fresh/input/

keybindings.rs

use crate::config::Config;
use crossterm::event::{KeyCode, KeyEvent, KeyModifiers};
use rust_i18n::t;
use std::collections::HashMap;
use std::sync::atomic::{AtomicBool, Ordering};

/// Normalize a key for consistent lookup in keybinding resolution.
///
/// Terminals vary in how they report certain keys:
/// - BackTab already encodes Shift+Tab, but some terminals also set SHIFT —
///   strip the redundant SHIFT so bindings defined as "BackTab" match.
/// - Shift+Backspace has no distinct semantics from plain Backspace — strip
///   the redundant SHIFT so bindings defined as "Backspace" match both.
/// - Uppercase letters may arrive as `Char('P')` + SHIFT (real Shift press)
///   or `Char('A')` without SHIFT (CapsLock on, kitty keyboard protocol).
///   In both cases, lowercase the character and preserve the existing
///   modifiers. This ensures CapsLock+Ctrl+A matches the `Ctrl+A` binding,
///   while Shift+P still matches the `Shift+P` binding.
fn normalize_key(code: KeyCode, modifiers: KeyModifiers) -> (KeyCode, KeyModifiers) {
    if code == KeyCode::BackTab {
        return (code, modifiers.difference(KeyModifiers::SHIFT));
    }
    if code == KeyCode::Backspace {
        return (code, modifiers.difference(KeyModifiers::SHIFT));
    }
    if let KeyCode::Char(c) = code {
        if c.is_ascii_uppercase() {
            return (KeyCode::Char(c.to_ascii_lowercase()), modifiers);
        }
    }
    (code, modifiers)
}

/// Global flag to force Linux-style keybinding display (Alt/Shift instead of ⌥/⇧)
/// This is primarily used in tests to ensure consistent output across platforms.
static FORCE_LINUX_KEYBINDINGS: AtomicBool = AtomicBool::new(false);

/// Force Linux-style keybinding display (Alt/Shift instead of ⌥/⇧)
/// Call this in tests to ensure consistent output regardless of platform.
pub fn set_force_linux_keybindings(force: bool) {
    FORCE_LINUX_KEYBINDINGS.store(force, Ordering::SeqCst);
}

/// Check if we should use macOS-style symbols for Alt and Shift keybindings
fn use_macos_symbols() -> bool {
    if FORCE_LINUX_KEYBINDINGS.load(Ordering::SeqCst) {
        return false;
    }
    cfg!(target_os = "macos")
}

/// Check if the given modifiers allow text input (character insertion).
///
/// Returns true for:
/// - No modifiers
/// - Shift only (for uppercase letters, symbols)
/// - Ctrl+Alt on Windows (AltGr key, used for special characters on international keyboards)
///
/// On Windows, the AltGr key is reported as Ctrl+Alt by crossterm, which is needed for
/// typing characters like @, [, ], {, }, etc. on German, French, and other keyboard layouts.
/// See: https://github.com/crossterm-rs/crossterm/issues/820
fn is_text_input_modifier(modifiers: KeyModifiers) -> bool {
    if modifiers.is_empty() || modifiers == KeyModifiers::SHIFT {
        return true;
    }

    // Windows: AltGr is reported as Ctrl+Alt by crossterm.
    // AltGr+Shift is needed for some layouts (e.g. Italian: AltGr+Shift+è = '{').
    // See: https://github.com/sinelaw/fresh/issues/993
    #[cfg(windows)]
    if modifiers == (KeyModifiers::CONTROL | KeyModifiers::ALT)
        || modifiers == (KeyModifiers::CONTROL | KeyModifiers::ALT | KeyModifiers::SHIFT)
    {
        return true;
    }

    false
}

/// Format a keybinding as a user-friendly string
/// On macOS, uses native symbols: ⌃ (Control), ⌥ (Option), ⇧ (Shift) without separators
/// On other platforms, uses "Ctrl+Alt+Shift+" format
pub fn format_keybinding(keycode: &KeyCode, modifiers: &KeyModifiers) -> String {
    let mut result = String::new();

    // On macOS, use native symbols: ⌃ (Control), ⌥ (Option/Alt), ⇧ (Shift), ⌘ (Command)
    let (ctrl_label, alt_label, shift_label, super_label) = if use_macos_symbols() {
        ("⌃", "⌥", "⇧", "⌘")
    } else {
        ("Ctrl", "Alt", "Shift", "Super")
    };

    let use_plus = !use_macos_symbols();

    if modifiers.contains(KeyModifiers::SUPER) {
        result.push_str(super_label);
        if use_plus {
            result.push('+');
        }
    }
    if modifiers.contains(KeyModifiers::CONTROL) {
        result.push_str(ctrl_label);
        if use_plus {
            result.push('+');
        }
    }
    if modifiers.contains(KeyModifiers::ALT) {
        result.push_str(alt_label);
        if use_plus {
            result.push('+');
        }
    }
    if modifiers.contains(KeyModifiers::SHIFT) {
        result.push_str(shift_label);
        if use_plus {
            result.push('+');
        }
    }

    match keycode {
        KeyCode::Enter => result.push_str("Enter"),
        KeyCode::Backspace => result.push_str("Backspace"),
        KeyCode::Delete => result.push_str("Del"),
        KeyCode::Tab => result.push_str("Tab"),
        KeyCode::Esc => result.push_str("Esc"),
        KeyCode::Left => result.push('←'),
        KeyCode::Right => result.push('→'),
        KeyCode::Up => result.push('↑'),
        KeyCode::Down => result.push('↓'),
        KeyCode::Home => result.push_str("Home"),
        KeyCode::End => result.push_str("End"),
        KeyCode::PageUp => result.push_str("PgUp"),
        KeyCode::PageDown => result.push_str("PgDn"),
        KeyCode::Char(' ') => result.push_str("Space"),
        KeyCode::Char(c) => result.push_str(&c.to_uppercase().to_string()),
        KeyCode::F(n) => result.push_str(&format!("F{}", n)),
        _ => return String::new(),
    }

    result
}

/// Returns a priority score for a keybinding key.
/// Lower scores indicate canonical/preferred keys, higher scores indicate terminal equivalents.
/// This helps ensure deterministic selection when multiple keybindings exist for an action.
fn keybinding_priority_score(key: &KeyCode) -> u32 {
    match key {
        // Terminal equivalents get higher scores (deprioritized)
        KeyCode::Char('@') => 100, // Equivalent of Space
        KeyCode::Char('7') => 100, // Equivalent of /
        KeyCode::Char('_') => 100, // Equivalent of -
        // Ctrl+H as backspace equivalent is handled differently (only plain Ctrl+H)
        // All other keys get default priority
        _ => 0,
    }
}

/// Returns terminal key equivalents for a given key combination.
///
/// Some key combinations are sent differently by terminals:
/// - Ctrl+/ is often sent as Ctrl+7
/// - Ctrl+Backspace is often sent as Ctrl+H
/// - Ctrl+Space is often sent as Ctrl+@ (NUL)
/// - Ctrl+[ is often sent as Escape
///
/// This function returns any equivalent key combinations that should be
/// treated as aliases for the given key.
pub fn terminal_key_equivalents(
    key: KeyCode,
    modifiers: KeyModifiers,
) -> Vec<(KeyCode, KeyModifiers)> {
    let mut equivalents = Vec::new();

    // Only consider equivalents when Ctrl is pressed
    if modifiers.contains(KeyModifiers::CONTROL) {
        let base_modifiers = modifiers; // Keep all modifiers including Ctrl

        match key {
            // Ctrl+/ is often sent as Ctrl+7
            KeyCode::Char('/') => {
                equivalents.push((KeyCode::Char('7'), base_modifiers));
            }
            KeyCode::Char('7') => {
                equivalents.push((KeyCode::Char('/'), base_modifiers));
            }

            // Ctrl+Backspace is often sent as Ctrl+H
            KeyCode::Backspace => {
                equivalents.push((KeyCode::Char('h'), base_modifiers));
            }
            KeyCode::Char('h') if modifiers == KeyModifiers::CONTROL => {
                // Only add Backspace equivalent for plain Ctrl+H (not Ctrl+Shift+H etc.)
                equivalents.push((KeyCode::Backspace, base_modifiers));
            }

            // Ctrl+Space is often sent as Ctrl+@ (NUL character, code 0)
            KeyCode::Char(' ') => {
                equivalents.push((KeyCode::Char('@'), base_modifiers));
            }
            KeyCode::Char('@') => {
                equivalents.push((KeyCode::Char(' '), base_modifiers));
            }

            // Ctrl+- is often sent as Ctrl+_
            KeyCode::Char('-') => {
                equivalents.push((KeyCode::Char('_'), base_modifiers));
            }
            KeyCode::Char('_') => {
                equivalents.push((KeyCode::Char('-'), base_modifiers));
            }

            _ => {}
        }
    }

    equivalents
}

/// Context in which a keybinding is active
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum KeyContext {
    /// Global bindings that work in all contexts (checked first with highest priority)
    Global,
    /// Normal editing mode
    Normal,
    /// Prompt/minibuffer is active
    Prompt,
    /// Popup window is visible
    Popup,
    /// Completion popup is visible (LSP or non-LSP). Takes precedence over `Popup`
    /// for `PopupKind::Completion` so accept/dismiss can be bound independently
    /// of the generic popup keys (Enter/Esc/Up/Down/PageUp/PageDown).
    Completion,
    /// File explorer has focus
    FileExplorer,
    /// Menu bar is active
    Menu,
    /// Terminal has focus
    Terminal,
    /// Settings modal is active
    Settings,
    /// Composite buffer (side-by-side diff) has focus
    CompositeBuffer,
    /// Buffer-local mode context (e.g. "search-replace-list")
    Mode(String),
}

impl KeyContext {
    /// Whether this context should allow all Normal-context bindings as fallbacks.
    ///
    /// CompositeBuffer is a specialized Normal view with extra context-specific
    /// bindings layered on top. All standard navigation bindings (arrows,
    /// PageUp/Down, etc.) should still work, so it falls through fully to
    /// Normal rather than restricting to application-wide actions only.
    pub fn allows_normal_fallthrough(&self) -> bool {
        matches!(self, Self::CompositeBuffer)
    }

    /// Whether this context should allow Normal-context bindings to fall
    /// through when the action is in the curated UI / navigation set
    /// (`is_terminal_ui_action`): tab/buffer switching, split navigation,
    /// palette, settings, etc. These actions don't depend on a text cursor
    /// and naturally apply to whichever buffer is currently active, so
    /// users expect them to work even when keyboard focus is elsewhere
    /// (e.g. on the file explorer). Issue #1903.
    ///
    /// Also true for plugin `Mode(_)` contexts so that focus inside a
    /// panel (search/replace, dashboard, git log, …) doesn't swallow
    /// global navigation keys. `is_terminal_ui_action` is the curated
    /// whitelist (split nav, palette, save, quit, help, …) — none of
    /// which a sensible plugin mode would want to suppress. See §18 of
    /// `docs/internal/search-replace-scope-replan-on-widgets.md`.
    pub fn allows_ui_fallthrough(&self) -> bool {
        matches!(self, Self::FileExplorer | Self::Mode(_))
    }

    /// Check if a context should allow input
    pub fn allows_text_input(&self) -> bool {
        matches!(self, Self::Normal | Self::Prompt | Self::FileExplorer)
    }

    /// Parse context from a "when" string
    pub fn from_when_clause(when: &str) -> Option<Self> {
        let trimmed = when.trim();
        if let Some(mode_name) = trimmed.strip_prefix("mode:") {
            return Some(Self::Mode(mode_name.to_string()));
        }
        Some(match trimmed {
            "global" => Self::Global,
            "prompt" => Self::Prompt,
            "popup" => Self::Popup,
            "completion" => Self::Completion,
            "fileExplorer" | "file_explorer" => Self::FileExplorer,
            "normal" => Self::Normal,
            "menu" => Self::Menu,
            "terminal" => Self::Terminal,
            "settings" => Self::Settings,
            "compositeBuffer" | "composite_buffer" => Self::CompositeBuffer,
            _ => return None,
        })
    }

    /// Convert context to "when" clause string
    pub fn to_when_clause(&self) -> String {
        match self {
            Self::Global => "global".to_string(),
            Self::Normal => "normal".to_string(),
            Self::Prompt => "prompt".to_string(),
            Self::Popup => "popup".to_string(),
            Self::Completion => "completion".to_string(),
            Self::FileExplorer => "fileExplorer".to_string(),
            Self::Menu => "menu".to_string(),
            Self::Terminal => "terminal".to_string(),
            Self::Settings => "settings".to_string(),
            Self::CompositeBuffer => "compositeBuffer".to_string(),
            Self::Mode(name) => format!("mode:{}", name),
        }
    }
}

/// High-level actions that can be performed in the editor
#[derive(Debug, Clone, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
pub enum Action {
    // Character input
    InsertChar(char),
    InsertNewline,
    InsertTab,

    // Basic movement
    MoveLeft,
    MoveRight,
    MoveUp,
    MoveDown,
    MoveWordLeft,
    MoveWordRight,
    MoveWordEnd,     // Move to end of current word (Ctrl+Right style, past the end)
    ViMoveWordEnd,   // Vim 'e' - move to end of word (ON last char, advances from word-end)
    MoveLeftInLine,  // Move left without crossing line boundaries
    MoveRightInLine, // Move right without crossing line boundaries
    MoveLineStart,
    MoveLineEnd,
    MoveLineUp,
    MoveLineDown,
    MovePageUp,
    MovePageDown,
    MoveDocumentStart,
    MoveDocumentEnd,

    // Selection movement (extends selection while moving)
    SelectLeft,
    SelectRight,
    SelectUp,
    SelectDown,
    SelectToParagraphUp,   // Jump to previous empty line with selection
    SelectToParagraphDown, // Jump to next empty line with selection
    SelectWordLeft,
    SelectWordRight,
    SelectWordEnd,   // Select to end of current word
    ViSelectWordEnd, // Vim 'e' selection - select to end of word (ON last char)
    SelectLineStart,
    SelectLineEnd,
    SelectDocumentStart,
    SelectDocumentEnd,
    SelectPageUp,
    SelectPageDown,
    SelectAll,
    SelectWord,
    SelectLine,
    ExpandSelection,

    // Block/rectangular selection (column-wise)
    BlockSelectLeft,
    BlockSelectRight,
    BlockSelectUp,
    BlockSelectDown,

    // Editing
    DeleteBackward,
    DeleteForward,
    DeleteWordBackward,
    DeleteWordForward,
    DeleteLine,
    DeleteToLineEnd,
    DeleteToLineStart,
    DeleteViWordEnd, // Delete from cursor to end of word (vim de)
    TransposeChars,
    OpenLine,
    DuplicateLine,

    // View
    Recenter,

    // Selection
    SetMark,

    // Clipboard
    Copy,
    CopyWithTheme(String),
    Cut,
    Paste,
    /// Copy the absolute filesystem path of the active buffer's file to the clipboard.
    CopyFilePath,
    /// Copy the active buffer's file path relative to the workspace root, falling
    /// back to the absolute path if the file lives outside the workspace.
    CopyRelativeFilePath,

    // Vi-style yank (copy without selection, then restore cursor)
    YankWordForward,
    YankWordBackward,
    YankToLineEnd,
    YankToLineStart,
    YankViWordEnd, // Yank from cursor to end of word (vim ye)

    // Multi-cursor
    AddCursorAbove,
    AddCursorBelow,
    AddCursorNextMatch,
    AddCursorsToLineEnds,
    RemoveSecondaryCursors,

    // File operations
    Save,
    SaveAs,
    Open,
    SwitchProject,
    New,
    Close,
    CloseTab,
    Quit,
    ForceQuit,
    Detach,
    Revert,
    ToggleAutoRevert,
    FormatBuffer,
    TrimTrailingWhitespace,
    EnsureFinalNewline,

    // Navigation
    GotoLine,
    ScanLineIndex,
    GoToMatchingBracket,
    JumpToNextError,
    JumpToPreviousError,

    // Smart editing
    SmartHome,
    DedentSelection,
    ToggleComment,
    DabbrevExpand,
    ToggleFold,

    // Bookmarks
    SetBookmark(char),
    JumpToBookmark(char),
    ClearBookmark(char),
    ListBookmarks,

    // Search options
    ToggleSearchCaseSensitive,
    ToggleSearchWholeWord,
    ToggleSearchRegex,
    ToggleSearchConfirmEach,

    // Macros
    StartMacroRecording,
    StopMacroRecording,
    PlayMacro(char),
    ToggleMacroRecording(char),
    ShowMacro(char),
    ListMacros,
    PromptRecordMacro,
    PromptPlayMacro,
    PlayLastMacro,

    // Bookmarks (prompt-based)
    PromptSetBookmark,
    PromptJumpToBookmark,

    // Undo/redo
    Undo,
    Redo,

    // View
    ScrollUp,
    ScrollDown,
    ShowHelp,
    ShowKeyboardShortcuts,
    ShowWarnings,
    ShowStatusLog,
    ShowLspStatus,
    ShowRemoteIndicatorMenu,
    ClearWarnings,
    CommandPalette, // Alias for QuickOpen — kept for keymap/plugin compatibility
    /// Quick Open - unified prompt with prefix-based provider routing
    QuickOpen,
    /// Quick Open - buffers (prefix: "#")
    QuickOpenBuffers,
    /// Quick Open - files (empty prefix)
    QuickOpenFiles,
    /// Open Live Grep as a floating overlay (issue #1796).
    OpenLiveGrep,
    /// Re-open Live Grep with the prior query and selection.
    ResumeLiveGrep,
    /// Export the Live Grep overlay's current results into the Utility
    /// Dock as a Quickfix list. Only fires when the active prompt is
    /// `PromptType::LiveGrep`.
    LiveGrepExportQuickfix,
    /// Toggle focus on the Utility Dock. If the dock exists and is not
    /// focused, focus it. If it is focused, return focus to the
    /// previously active editor split.
    ToggleUtilityDock,
    /// Open a terminal inside the Utility Dock (creates the dock if
    /// absent; otherwise swaps the active dock buffer to a terminal).
    OpenTerminalInDock,
    /// Switch the Live Grep overlay to the next available registered
    /// search provider (skipping unavailable ones), then re-run the
    /// current query under it. Plumbs through to the
    /// `live_grep_cycle_provider` plugin handler.
    CycleLiveGrepProvider,
    ToggleLineWrap,
    ToggleCurrentLineHighlight,
    ToggleReadOnly,
    TogglePageView,
    SetPageWidth,
    InspectThemeAtCursor,
    SelectTheme,
    SelectKeybindingMap,
    SelectCursorStyle,
    SelectLocale,

    // Buffer/tab navigation
    NextBuffer,
    PrevBuffer,
    SwitchToPreviousTab,
    SwitchToTabByName,

    // Tab scrolling
    ScrollTabsLeft,
    ScrollTabsRight,

    // Position history navigation
    NavigateBack,
    NavigateForward,

    // Split view operations
    SplitHorizontal,
    SplitVertical,
    CloseSplit,
    NextSplit,
    PrevSplit,
    NextWindow,
    PrevWindow,
    IncreaseSplitSize,
    DecreaseSplitSize,
    ToggleMaximizeSplit,

    // Prompt mode actions
    PromptConfirm,
    /// PromptConfirm with recorded text for macro playback
    PromptConfirmWithText(String),
    PromptCancel,
    PromptBackspace,
    PromptDelete,
    PromptMoveLeft,
    PromptMoveRight,
    PromptMoveStart,
    PromptMoveEnd,
    PromptSelectPrev,
    PromptSelectNext,
    PromptPageUp,
    PromptPageDown,
    PromptAcceptSuggestion,
    PromptMoveWordLeft,
    PromptMoveWordRight,
    // Advanced prompt editing (word operations, clipboard)
    PromptDeleteWordForward,
    PromptDeleteWordBackward,
    PromptDeleteToLineEnd,
    PromptCopy,
    PromptCut,
    PromptPaste,
    // Prompt selection actions
    PromptMoveLeftSelecting,
    PromptMoveRightSelecting,
    PromptMoveHomeSelecting,
    PromptMoveEndSelecting,
    PromptSelectWordLeft,
    PromptSelectWordRight,
    PromptSelectAll,

    // File browser actions
    FileBrowserToggleHidden,
    FileBrowserToggleDetectEncoding,

    // Popup mode actions
    PopupSelectNext,
    PopupSelectPrev,
    PopupPageUp,
    PopupPageDown,
    PopupConfirm,
    PopupCancel,
    /// Transfer keyboard focus to the topmost visible popup. LSP popups
    /// are shown unfocused (so they don't silently swallow keystrokes);
    /// this action lets the user grab them with the keyboard. Default
    /// binding is `Alt+T` and is configurable via the keybinding map.
    PopupFocus,

    // Completion popup actions (override generic Popup keys for PopupKind::Completion)
    CompletionAccept,
    CompletionDismiss,

    // File explorer operations
    ToggleFileExplorer,
    // File explorer side (left/right) toggle
    ToggleFileExplorerSide,
    // Menu bar visibility
    ToggleMenuBar,
    // Tab bar visibility
    ToggleTabBar,
    // Status bar visibility
    ToggleStatusBar,
    // Prompt line visibility
    TogglePromptLine,
    // Scrollbar visibility
    ToggleVerticalScrollbar,
    ToggleHorizontalScrollbar,
    FocusFileExplorer,
    FocusEditor,
    FileExplorerUp,
    FileExplorerDown,
    FileExplorerPageUp,
    FileExplorerPageDown,
    FileExplorerExpand,
    FileExplorerCollapse,
    FileExplorerOpen,
    FileExplorerRefresh,
    FileExplorerNewFile,
    FileExplorerNewDirectory,
    FileExplorerDelete,
    FileExplorerRename,
    FileExplorerToggleHidden,
    FileExplorerToggleGitignored,
    FileExplorerSearchClear,
    FileExplorerSearchBackspace,
    FileExplorerCopy,
    FileExplorerCut,
    FileExplorerPaste,
    FileExplorerDuplicate,
    FileExplorerCopyFullPath,
    FileExplorerCopyRelativePath,
    FileExplorerExtendSelectionUp,
    FileExplorerExtendSelectionDown,
    FileExplorerToggleSelect,
    FileExplorerSelectAll,

    // LSP operations
    LspCompletion,
    LspGotoDefinition,
    LspReferences,
    LspRename,
    LspHover,
    LspSignatureHelp,
    LspCodeActions,
    LspRestart,
    LspStop,
    LspToggleForBuffer,
    ToggleInlayHints,
    ToggleMouseHover,

    // View toggles
    ToggleLineNumbers,
    ToggleScrollSync,
    ToggleMouseCapture,
    ToggleDebugHighlights, // Debug mode: show highlight/overlay byte ranges
    SetBackground,
    SetBackgroundBlend,

    // Buffer settings (per-buffer overrides)
    SetTabSize,
    SetLineEnding,
    SetEncoding,
    ReloadWithEncoding,
    SetLanguage,
    ToggleIndentationStyle,
    ToggleTabIndicators,
    ToggleWhitespaceIndicators,
    ResetBufferSettings,
    AddRuler,
    RemoveRuler,

    // Config operations
    DumpConfig,

    // Force a full terminal clear + redraw (fixes display corruption from external output)
    RedrawScreen,

    // Search and replace
    Search,
    FindInSelection,
    FindNext,
    FindPrevious,
    FindSelectionNext,     // Quick find next occurrence of selection (Ctrl+F3)
    FindSelectionPrevious, // Quick find previous occurrence of selection (Ctrl+Shift+F3)
    Replace,
    QueryReplace, // Interactive replace (y/n/!/q for each match)

    // Menu navigation
    MenuActivate,     // Open menu bar (Alt or F10)
    MenuClose,        // Close menu (Esc)
    MenuLeft,         // Navigate to previous menu
    MenuRight,        // Navigate to next menu
    MenuUp,           // Navigate to previous item in menu
    MenuDown,         // Navigate to next item in menu
    MenuExecute,      // Execute selected menu item (Enter)
    MenuOpen(String), // Open a specific menu by name (e.g., "File", "Edit")

    // Keybinding map switching
    SwitchKeybindingMap(String), // Switch to a named keybinding map (e.g., "default", "emacs", "vscode")

    // Plugin custom actions
    PluginAction(String),

    // Settings operations
    OpenSettings,        // Open the settings modal
    CloseSettings,       // Close the settings modal
    SettingsSave,        // Save settings changes
    SettingsReset,       // Reset current setting to default
    SettingsToggleFocus, // Toggle focus between category and settings panels
    SettingsActivate,    // Activate/toggle the current setting
    SettingsSearch,      // Start search in settings
    SettingsHelp,        // Show settings help overlay
    SettingsIncrement,   // Increment number value or next dropdown option
    SettingsDecrement,   // Decrement number value or previous dropdown option
    SettingsInherit,     // Set nullable setting to null (inherit value)

    // Terminal operations
    OpenTerminal,          // Open a new terminal in the current split
    CloseTerminal,         // Close the current terminal
    FocusTerminal,         // Focus the terminal buffer (if viewing terminal, focus input)
    TerminalEscape,        // Escape from terminal mode back to editor
    ToggleKeyboardCapture, // Toggle keyboard capture mode (all keys go to terminal)
    TerminalPaste,         // Paste clipboard contents into terminal as a single batch

    // Shell command operations
    ShellCommand,        // Run shell command on buffer/selection, output to new buffer
    ShellCommandReplace, // Run shell command on buffer/selection, replace content

    // Case conversion
    ToUpperCase, // Convert selection to uppercase
    ToLowerCase, // Convert selection to lowercase
    ToggleCase,  // Toggle case of character under cursor (vim ~)
    SortLines,   // Sort selected lines alphabetically

    // Input calibration
    CalibrateInput, // Open the input calibration wizard

    // Event debug
    EventDebug, // Open the event debug dialog

    // Process control
    SuspendProcess, // Suspend the editor process (SIGTSTP on Unix); resume with `fg`

    // Keybinding editor
    OpenKeybindingEditor, // Open the keybinding editor modal

    // Plugin development
    LoadPluginFromBuffer, // Load current buffer as a plugin

    // User init.ts (design M4, M5, M6)
    InitReload, // Reload ~/.config/fresh/init.ts via the existing plugin pipeline
    InitEdit,   // Open ~/.config/fresh/init.ts (creates from template if missing)
    InitCheck,  // Syntax-check ~/.config/fresh/init.ts via oxc

    // Composite buffer (side-by-side diff) hunk navigation
    CompositeNextHunk, // Navigate to the next hunk in a composite diff view
    CompositePrevHunk, // Navigate to the previous hunk in a composite diff view

    // Workspace trust (per-project process-execution policy)
    WorkspaceTrustTrust,    // Trust this workspace: allow all process execution
    WorkspaceTrustRestrict, // Restrict: no repo-controlled execution (the safe default)
    WorkspaceTrustBlock,    // Block: no process execution at all
    WorkspaceTrustPrompt,   // Open the workspace-trust dialog to change the level

    // No-op
    None,
}

/// Macro that generates both `Action::from_str` and `Action::all_action_names` from a single
/// definition, ensuring the list of valid action name strings is always in sync at compile time.
///
/// The first argument (`$args_name`) is the identifier used for the args parameter in custom
/// bodies. This is needed so that macro hygiene allows the custom body expressions to reference
/// the function parameter (both the definition and usage share the call-site span).
///
/// Four categories of action mappings:
/// - `simple`: `"name" => Variant` — no args needed
/// - `alias`: `"name" => Variant` — like simple, but only for from_str (not to_action_str)
/// - `with_char`: `"name" => Variant` — passes through `with_char(args, ...)` for char-arg actions
/// - `custom`: `"name" => { body }` — arbitrary expression using `$args_name` for complex arg parsing
macro_rules! define_action_str_mapping {
    (
        $args_name:ident;
        simple { $($s_name:literal => $s_variant:ident),* $(,)? }
        alias { $($a_name:literal => $a_variant:ident),* $(,)? }
        with_char { $($c_name:literal => $c_variant:ident),* $(,)? }
        custom { $($x_name:literal => $x_variant:ident : $x_body:expr),* $(,)? }
    ) => {
        /// Parse action from string (used when loading from config)
        pub fn from_str(s: &str, $args_name: &HashMap<String, serde_json::Value>) -> Option<Self> {
            Some(match s {
                $($s_name => Self::$s_variant,)*
                $($a_name => Self::$a_variant,)*
                $($c_name => return Self::with_char($args_name, Self::$c_variant),)*
                $($x_name => $x_body,)*
                // Unrecognized action names are treated as plugin actions, allowing
                // keybindings for plugin-registered commands to load from config.
                _ => Self::PluginAction(s.to_string()),
            })
        }

        /// Convert an action back to its string name (inverse of from_str).
        /// Returns the canonical action name string.
        pub fn to_action_str(&self) -> String {
            match self {
                $(Self::$s_variant => $s_name.to_string(),)*
                $(Self::$c_variant(_) => $c_name.to_string(),)*
                $(Self::$x_variant(_) => $x_name.to_string(),)*
                Self::PluginAction(name) => name.clone(),
            }
        }

        /// All valid action name strings, sorted alphabetically.
        /// Generated from the same macro as `from_str`, guaranteeing compile-time completeness.
        pub fn all_action_names() -> Vec<String> {
            let mut names = vec![
                $($s_name.to_string(),)*
                $($a_name.to_string(),)*
                $($c_name.to_string(),)*
                $($x_name.to_string(),)*
            ];
            names.sort();
            names
        }
    };
}

impl Action {
    fn with_char(
        args: &HashMap<String, serde_json::Value>,
        make_action: impl FnOnce(char) -> Self,
    ) -> Option<Self> {
        if let Some(serde_json::Value::String(value)) = args.get("char") {
            value.chars().next().map(make_action)
        } else {
            None
        }
    }

    define_action_str_mapping! {
        args;
        simple {
            "insert_newline" => InsertNewline,
            "insert_tab" => InsertTab,

            "move_left" => MoveLeft,
            "move_right" => MoveRight,
            "move_up" => MoveUp,
            "move_down" => MoveDown,
            "move_word_left" => MoveWordLeft,
            "move_word_right" => MoveWordRight,
            "move_word_end" => MoveWordEnd,
            "vi_move_word_end" => ViMoveWordEnd,
            "move_left_in_line" => MoveLeftInLine,
            "move_right_in_line" => MoveRightInLine,
            "move_line_start" => MoveLineStart,
            "move_line_end" => MoveLineEnd,
            "move_line_up" => MoveLineUp,
            "move_line_down" => MoveLineDown,
            "move_page_up" => MovePageUp,
            "move_page_down" => MovePageDown,
            "move_document_start" => MoveDocumentStart,
            "move_document_end" => MoveDocumentEnd,

            "select_left" => SelectLeft,
            "select_right" => SelectRight,
            "select_up" => SelectUp,
            "select_down" => SelectDown,
            "select_to_paragraph_up" => SelectToParagraphUp,
            "select_to_paragraph_down" => SelectToParagraphDown,
            "select_word_left" => SelectWordLeft,
            "select_word_right" => SelectWordRight,
            "select_word_end" => SelectWordEnd,
            "vi_select_word_end" => ViSelectWordEnd,
            "select_line_start" => SelectLineStart,
            "select_line_end" => SelectLineEnd,
            "select_document_start" => SelectDocumentStart,
            "select_document_end" => SelectDocumentEnd,
            "select_page_up" => SelectPageUp,
            "select_page_down" => SelectPageDown,
            "select_all" => SelectAll,
            "select_word" => SelectWord,
            "select_line" => SelectLine,
            "expand_selection" => ExpandSelection,

            "block_select_left" => BlockSelectLeft,
            "block_select_right" => BlockSelectRight,
            "block_select_up" => BlockSelectUp,
            "block_select_down" => BlockSelectDown,

            "delete_backward" => DeleteBackward,
            "delete_forward" => DeleteForward,
            "delete_word_backward" => DeleteWordBackward,
            "delete_word_forward" => DeleteWordForward,
            "delete_line" => DeleteLine,
            "delete_to_line_end" => DeleteToLineEnd,
            "delete_to_line_start" => DeleteToLineStart,
            "delete_vi_word_end" => DeleteViWordEnd,
            "transpose_chars" => TransposeChars,
            "open_line" => OpenLine,
            "duplicate_line" => DuplicateLine,
            "recenter" => Recenter,
            "set_mark" => SetMark,

            "copy" => Copy,
            "cut" => Cut,
            "paste" => Paste,
            "copy_file_path" => CopyFilePath,
            "copy_relative_file_path" => CopyRelativeFilePath,

            "yank_word_forward" => YankWordForward,
            "yank_word_backward" => YankWordBackward,
            "yank_to_line_end" => YankToLineEnd,
            "yank_to_line_start" => YankToLineStart,
            "yank_vi_word_end" => YankViWordEnd,

            "add_cursor_above" => AddCursorAbove,
            "add_cursor_below" => AddCursorBelow,
            "add_cursor_next_match" => AddCursorNextMatch,
            "add_cursors_to_line_ends" => AddCursorsToLineEnds,
            "remove_secondary_cursors" => RemoveSecondaryCursors,

            "save" => Save,
            "save_as" => SaveAs,
            "open" => Open,
            "switch_project" => SwitchProject,
            "new" => New,
            "close" => Close,
            "close_tab" => CloseTab,
            "quit" => Quit,
            "force_quit" => ForceQuit,
            "detach" => Detach,
            "revert" => Revert,
            "toggle_auto_revert" => ToggleAutoRevert,
            "format_buffer" => FormatBuffer,
            "trim_trailing_whitespace" => TrimTrailingWhitespace,
            "ensure_final_newline" => EnsureFinalNewline,
            "goto_line" => GotoLine,
            "scan_line_index" => ScanLineIndex,
            "goto_matching_bracket" => GoToMatchingBracket,
            "jump_to_next_error" => JumpToNextError,
            "jump_to_previous_error" => JumpToPreviousError,

            "smart_home" => SmartHome,
            "dedent_selection" => DedentSelection,
            "toggle_comment" => ToggleComment,
            "dabbrev_expand" => DabbrevExpand,
            "toggle_fold" => ToggleFold,

            "list_bookmarks" => ListBookmarks,

            "toggle_search_case_sensitive" => ToggleSearchCaseSensitive,
            "toggle_search_whole_word" => ToggleSearchWholeWord,
            "toggle_search_regex" => ToggleSearchRegex,
            "toggle_search_confirm_each" => ToggleSearchConfirmEach,

            "start_macro_recording" => StartMacroRecording,
            "stop_macro_recording" => StopMacroRecording,

            "list_macros" => ListMacros,
            "prompt_record_macro" => PromptRecordMacro,
            "prompt_play_macro" => PromptPlayMacro,
            "play_last_macro" => PlayLastMacro,
            "prompt_set_bookmark" => PromptSetBookmark,
            "prompt_jump_to_bookmark" => PromptJumpToBookmark,

            "undo" => Undo,
            "redo" => Redo,

            "scroll_up" => ScrollUp,
            "scroll_down" => ScrollDown,
            "show_help" => ShowHelp,
            "keyboard_shortcuts" => ShowKeyboardShortcuts,
            "show_warnings" => ShowWarnings,
            "show_status_log" => ShowStatusLog,
            "show_lsp_status" => ShowLspStatus,
            "show_remote_indicator_menu" => ShowRemoteIndicatorMenu,
            "clear_warnings" => ClearWarnings,
            "command_palette" => CommandPalette,
            "quick_open" => QuickOpen,
            "quick_open_buffers" => QuickOpenBuffers,
            "quick_open_files" => QuickOpenFiles,
            "open_live_grep" => OpenLiveGrep,
            "resume_live_grep" => ResumeLiveGrep,
            "live_grep_export_quickfix" => LiveGrepExportQuickfix,
            "toggle_utility_dock" => ToggleUtilityDock,
            "open_terminal_in_dock" => OpenTerminalInDock,
            "cycle_live_grep_provider" => CycleLiveGrepProvider,
            "toggle_line_wrap" => ToggleLineWrap,
            "toggle_current_line_highlight" => ToggleCurrentLineHighlight,
            "toggle_read_only" => ToggleReadOnly,
            "toggle_page_view" => TogglePageView,
            "set_page_width" => SetPageWidth,

            "next_buffer" => NextBuffer,
            "prev_buffer" => PrevBuffer,
            "switch_to_previous_tab" => SwitchToPreviousTab,
            "switch_to_tab_by_name" => SwitchToTabByName,
            "scroll_tabs_left" => ScrollTabsLeft,
            "scroll_tabs_right" => ScrollTabsRight,

            "navigate_back" => NavigateBack,
            "navigate_forward" => NavigateForward,

            "split_horizontal" => SplitHorizontal,
            "split_vertical" => SplitVertical,
            "close_split" => CloseSplit,
            "next_split" => NextSplit,
            "prev_split" => PrevSplit,
            "next_window" => NextWindow,
            "prev_window" => PrevWindow,
            "increase_split_size" => IncreaseSplitSize,
            "decrease_split_size" => DecreaseSplitSize,
            "toggle_maximize_split" => ToggleMaximizeSplit,

            "prompt_confirm" => PromptConfirm,
            "prompt_cancel" => PromptCancel,
            "prompt_backspace" => PromptBackspace,
            "prompt_move_left" => PromptMoveLeft,
            "prompt_move_right" => PromptMoveRight,
            "prompt_move_start" => PromptMoveStart,
            "prompt_move_end" => PromptMoveEnd,
            "prompt_select_prev" => PromptSelectPrev,
            "prompt_select_next" => PromptSelectNext,
            "prompt_page_up" => PromptPageUp,
            "prompt_page_down" => PromptPageDown,
            "prompt_accept_suggestion" => PromptAcceptSuggestion,
            "prompt_delete_word_forward" => PromptDeleteWordForward,
            "prompt_delete_word_backward" => PromptDeleteWordBackward,
            "prompt_delete_to_line_end" => PromptDeleteToLineEnd,
            "prompt_copy" => PromptCopy,
            "prompt_cut" => PromptCut,
            "prompt_paste" => PromptPaste,
            "prompt_move_left_selecting" => PromptMoveLeftSelecting,
            "prompt_move_right_selecting" => PromptMoveRightSelecting,
            "prompt_move_home_selecting" => PromptMoveHomeSelecting,
            "prompt_move_end_selecting" => PromptMoveEndSelecting,
            "prompt_select_word_left" => PromptSelectWordLeft,
            "prompt_select_word_right" => PromptSelectWordRight,
            "prompt_select_all" => PromptSelectAll,
            "file_browser_toggle_hidden" => FileBrowserToggleHidden,
            "file_browser_toggle_detect_encoding" => FileBrowserToggleDetectEncoding,
            "prompt_move_word_left" => PromptMoveWordLeft,
            "prompt_move_word_right" => PromptMoveWordRight,
            "prompt_delete" => PromptDelete,

            "popup_select_next" => PopupSelectNext,
            "popup_select_prev" => PopupSelectPrev,
            "popup_page_up" => PopupPageUp,
            "popup_page_down" => PopupPageDown,
            "popup_confirm" => PopupConfirm,
            "popup_cancel" => PopupCancel,
            "popup_focus" => PopupFocus,

            "completion_accept" => CompletionAccept,
            "completion_dismiss" => CompletionDismiss,

            "toggle_file_explorer" => ToggleFileExplorer,
            "toggle_file_explorer_side" => ToggleFileExplorerSide,
            "toggle_menu_bar" => ToggleMenuBar,
            "toggle_tab_bar" => ToggleTabBar,
            "toggle_status_bar" => ToggleStatusBar,
            "toggle_prompt_line" => TogglePromptLine,
            "toggle_vertical_scrollbar" => ToggleVerticalScrollbar,
            "toggle_horizontal_scrollbar" => ToggleHorizontalScrollbar,
            "focus_file_explorer" => FocusFileExplorer,
            "focus_editor" => FocusEditor,
            "file_explorer_up" => FileExplorerUp,
            "file_explorer_down" => FileExplorerDown,
            "file_explorer_page_up" => FileExplorerPageUp,
            "file_explorer_page_down" => FileExplorerPageDown,
            "file_explorer_expand" => FileExplorerExpand,
            "file_explorer_collapse" => FileExplorerCollapse,
            "file_explorer_open" => FileExplorerOpen,
            "file_explorer_refresh" => FileExplorerRefresh,
            "file_explorer_new_file" => FileExplorerNewFile,
            "file_explorer_new_directory" => FileExplorerNewDirectory,
            "file_explorer_delete" => FileExplorerDelete,
            "file_explorer_rename" => FileExplorerRename,
            "file_explorer_toggle_hidden" => FileExplorerToggleHidden,
            "file_explorer_toggle_gitignored" => FileExplorerToggleGitignored,
            "file_explorer_search_clear" => FileExplorerSearchClear,
            "file_explorer_search_backspace" => FileExplorerSearchBackspace,
            "file_explorer_copy" => FileExplorerCopy,
            "file_explorer_cut" => FileExplorerCut,
            "file_explorer_paste" => FileExplorerPaste,
            "file_explorer_duplicate" => FileExplorerDuplicate,
            "file_explorer_copy_full_path" => FileExplorerCopyFullPath,
            "file_explorer_copy_relative_path" => FileExplorerCopyRelativePath,
            "file_explorer_extend_selection_up" => FileExplorerExtendSelectionUp,
            "file_explorer_extend_selection_down" => FileExplorerExtendSelectionDown,
            "file_explorer_toggle_select" => FileExplorerToggleSelect,
            "file_explorer_select_all" => FileExplorerSelectAll,

            "lsp_completion" => LspCompletion,
            "lsp_goto_definition" => LspGotoDefinition,
            "lsp_references" => LspReferences,
            "lsp_rename" => LspRename,
            "lsp_hover" => LspHover,
            "lsp_signature_help" => LspSignatureHelp,
            "lsp_code_actions" => LspCodeActions,
            "lsp_restart" => LspRestart,
            "lsp_stop" => LspStop,
            "lsp_toggle_for_buffer" => LspToggleForBuffer,
            "toggle_inlay_hints" => ToggleInlayHints,
            "toggle_mouse_hover" => ToggleMouseHover,

            "toggle_line_numbers" => ToggleLineNumbers,
            "toggle_scroll_sync" => ToggleScrollSync,
            "toggle_mouse_capture" => ToggleMouseCapture,
            "toggle_debug_highlights" => ToggleDebugHighlights,
            "set_background" => SetBackground,
            "set_background_blend" => SetBackgroundBlend,
            "inspect_theme_at_cursor" => InspectThemeAtCursor,
            "select_theme" => SelectTheme,
            "select_keybinding_map" => SelectKeybindingMap,
            "select_cursor_style" => SelectCursorStyle,
            "select_locale" => SelectLocale,

            "set_tab_size" => SetTabSize,
            "set_line_ending" => SetLineEnding,
            "set_encoding" => SetEncoding,
            "reload_with_encoding" => ReloadWithEncoding,
            "set_language" => SetLanguage,
            "toggle_indentation_style" => ToggleIndentationStyle,
            "toggle_tab_indicators" => ToggleTabIndicators,
            "toggle_whitespace_indicators" => ToggleWhitespaceIndicators,
            "reset_buffer_settings" => ResetBufferSettings,
            "add_ruler" => AddRuler,
            "remove_ruler" => RemoveRuler,

            "dump_config" => DumpConfig,
            "redraw_screen" => RedrawScreen,

            "search" => Search,
            "find_in_selection" => FindInSelection,
            "find_next" => FindNext,
            "find_previous" => FindPrevious,
            "find_selection_next" => FindSelectionNext,
            "find_selection_previous" => FindSelectionPrevious,
            "replace" => Replace,
            "query_replace" => QueryReplace,

            "menu_activate" => MenuActivate,
            "menu_close" => MenuClose,
            "menu_left" => MenuLeft,
            "menu_right" => MenuRight,
            "menu_up" => MenuUp,
            "menu_down" => MenuDown,
            "menu_execute" => MenuExecute,

            "open_terminal" => OpenTerminal,
            "close_terminal" => CloseTerminal,
            "focus_terminal" => FocusTerminal,
            "terminal_escape" => TerminalEscape,
            "toggle_keyboard_capture" => ToggleKeyboardCapture,
            "terminal_paste" => TerminalPaste,

            "shell_command" => ShellCommand,
            "shell_command_replace" => ShellCommandReplace,

            "to_upper_case" => ToUpperCase,
            "to_lower_case" => ToLowerCase,
            "toggle_case" => ToggleCase,
            "sort_lines" => SortLines,

            "calibrate_input" => CalibrateInput,
            "event_debug" => EventDebug,
            "suspend_process" => SuspendProcess,
            "load_plugin_from_buffer" => LoadPluginFromBuffer,
            "init_reload" => InitReload,
            "init_edit" => InitEdit,
            "init_check" => InitCheck,
            "open_keybinding_editor" => OpenKeybindingEditor,

            "composite_next_hunk" => CompositeNextHunk,
            "composite_prev_hunk" => CompositePrevHunk,

            "workspace_trust_trust" => WorkspaceTrustTrust,
            "workspace_trust_restrict" => WorkspaceTrustRestrict,
            "workspace_trust_block" => WorkspaceTrustBlock,
            "workspace_trust_prompt" => WorkspaceTrustPrompt,

            "noop" => None,

            "open_settings" => OpenSettings,
            "close_settings" => CloseSettings,
            "settings_save" => SettingsSave,
            "settings_reset" => SettingsReset,
            "settings_toggle_focus" => SettingsToggleFocus,
            "settings_activate" => SettingsActivate,
            "settings_search" => SettingsSearch,
            "settings_help" => SettingsHelp,
            "settings_increment" => SettingsIncrement,
            "settings_decrement" => SettingsDecrement,
            "settings_inherit" => SettingsInherit,
        }
        alias {
            "toggle_compose_mode" => TogglePageView,
            "set_compose_width" => SetPageWidth,
            // Common synonym users reach for when trying to disable a
            // default binding (issue #2030). Without this alias,
            // `Action::from_str` returns `None` for `"none"` and the
            // user's override silently fails to load.
            "none" => None,
        }
        with_char {
            "insert_char" => InsertChar,
            "set_bookmark" => SetBookmark,
            "jump_to_bookmark" => JumpToBookmark,
            "clear_bookmark" => ClearBookmark,
            "play_macro" => PlayMacro,
            "toggle_macro_recording" => ToggleMacroRecording,
            "show_macro" => ShowMacro,
        }
        custom {
            "copy_with_theme" => CopyWithTheme : {
                // Empty theme = open theme picker prompt
                let theme = args.get("theme").and_then(|v| v.as_str()).unwrap_or("");
                Self::CopyWithTheme(theme.to_string())
            },
            "menu_open" => MenuOpen : {
                let name = args.get("name")?.as_str()?;
                Self::MenuOpen(name.to_string())
            },
            "switch_keybinding_map" => SwitchKeybindingMap : {
                let map_name = args.get("map")?.as_str()?;
                Self::SwitchKeybindingMap(map_name.to_string())
            },
            "prompt_confirm_with_text" => PromptConfirmWithText : {
                let text = args.get("text")?.as_str()?;
                Self::PromptConfirmWithText(text.to_string())
            },
        }
    }

    /// For action names whose string form takes a string-typed arg, return the
    /// arg-map key that carries the variant value (e.g. `menu_open` → `"name"`).
    /// Returns `None` for actions with no enumerable string variant.
    ///
    /// Drives the keybinding editor's qualified-name syntax
    /// (`menu_open:File` ↔ `{action: "menu_open", args: {name: "File"}}`).
    pub fn variant_arg_key(bare_action: &str) -> Option<&'static str> {
        match bare_action {
            "menu_open" => Some("name"),
            "switch_keybinding_map" => Some("map"),
            _ => None,
        }
    }

    /// Collapse an `(action, args)` pair into a qualified action string.
    /// Parameterised actions with a string variant become `bare:value`
    /// (e.g. `menu_open:File`); everything else is returned unchanged.
    pub fn qualify_action(bare_action: &str, args: &HashMap<String, serde_json::Value>) -> String {
        if let Some(key) = Self::variant_arg_key(bare_action) {
            if let Some(v) = args.get(key).and_then(|v| v.as_str()) {
                return format!("{}:{}", bare_action, v);
            }
        }
        bare_action.to_string()
    }

    /// Qualified string for this Action value — the inverse of
    /// [`Self::unqualify_action`]. Used when we already hold an `Action`
    /// enum (e.g. from a plugin mode's default bindings) and want the same
    /// qualified form the editor uses elsewhere.
    pub fn to_qualified_action_str(&self) -> String {
        match self {
            Self::MenuOpen(name) => format!("menu_open:{}", name),
            Self::SwitchKeybindingMap(map) => format!("switch_keybinding_map:{}", map),
            other => other.to_action_str(),
        }
    }

    /// Inverse of [`qualify_action`]: split a qualified action string into the
    /// bare action name and the args map it implies. For unqualified strings
    /// (or suffix syntax used on an action with no variant arg) returns the
    /// input unchanged with empty args.
    pub fn unqualify_action(qualified: &str) -> (String, HashMap<String, serde_json::Value>) {
        if let Some((bare, suffix)) = qualified.split_once(':') {
            if let Some(arg_key) = Self::variant_arg_key(bare) {
                let mut args = HashMap::new();
                args.insert(
                    arg_key.to_string(),
                    serde_json::Value::String(suffix.to_string()),
                );
                return (bare.to_string(), args);
            }
        }
        (qualified.to_string(), HashMap::new())
    }

    /// Check if this action is a movement or editing action that should be
    /// ignored in virtual buffers with hidden cursors.
    pub fn is_movement_or_editing(&self) -> bool {
        matches!(
            self,
            // Movement actions
            Action::MoveLeft
                | Action::MoveRight
                | Action::MoveUp
                | Action::MoveDown
                | Action::MoveWordLeft
                | Action::MoveWordRight
                | Action::MoveWordEnd
                | Action::ViMoveWordEnd
                | Action::MoveLeftInLine
                | Action::MoveRightInLine
                | Action::MoveLineStart
                | Action::MoveLineEnd
                | Action::MovePageUp
                | Action::MovePageDown
                | Action::MoveDocumentStart
                | Action::MoveDocumentEnd
                // Selection actions
                | Action::SelectLeft
                | Action::SelectRight
                | Action::SelectUp
                | Action::SelectDown
                | Action::SelectToParagraphUp
                | Action::SelectToParagraphDown
                | Action::SelectWordLeft
                | Action::SelectWordRight
                | Action::SelectWordEnd
                | Action::ViSelectWordEnd
                | Action::SelectLineStart
                | Action::SelectLineEnd
                | Action::SelectDocumentStart
                | Action::SelectDocumentEnd
                | Action::SelectPageUp
                | Action::SelectPageDown
                | Action::SelectAll
                | Action::SelectWord
                | Action::SelectLine
                | Action::ExpandSelection
                // Block selection
                | Action::BlockSelectLeft
                | Action::BlockSelectRight
                | Action::BlockSelectUp
                | Action::BlockSelectDown
                // Editing actions
                | Action::InsertChar(_)
                | Action::InsertNewline
                | Action::InsertTab
                | Action::DeleteBackward
                | Action::DeleteForward
                | Action::DeleteWordBackward
                | Action::DeleteWordForward
                | Action::DeleteLine
                | Action::DeleteToLineEnd
                | Action::DeleteToLineStart
                | Action::TransposeChars
                | Action::OpenLine
                | Action::DuplicateLine
                | Action::MoveLineUp
                | Action::MoveLineDown
                // Clipboard editing (but not Copy)
                | Action::Cut
                | Action::Paste
                // Undo/Redo
                | Action::Undo
                | Action::Redo
        )
    }

    /// Check if this action modifies buffer content (for block selection conversion).
    /// Block selections should be converted to multi-cursor before these actions.
    pub fn is_editing(&self) -> bool {
        matches!(
            self,
            Action::InsertChar(_)
                | Action::InsertNewline
                | Action::InsertTab
                | Action::DeleteBackward
                | Action::DeleteForward
                | Action::DeleteWordBackward
                | Action::DeleteWordForward
                | Action::DeleteLine
                | Action::DeleteToLineEnd
                | Action::DeleteToLineStart
                | Action::DeleteViWordEnd
                | Action::TransposeChars
                | Action::OpenLine
                | Action::DuplicateLine
                | Action::MoveLineUp
                | Action::MoveLineDown
                | Action::Cut
                | Action::Paste
        )
    }
}

/// Result of chord resolution
#[derive(Debug, Clone, PartialEq)]
pub enum ChordResolution {
    /// Complete match: execute the action
    Complete(Action),
    /// Partial match: continue waiting for more keys in the sequence
    Partial,
    /// No match: the sequence doesn't match any binding
    NoMatch,
}

/// Resolves key events to actions based on configuration
#[derive(Clone)]
pub struct KeybindingResolver {
    /// Map from context to key bindings (single key bindings)
    /// Context-specific bindings have priority over normal bindings
    bindings: HashMap<KeyContext, HashMap<(KeyCode, KeyModifiers), Action>>,

    /// Default bindings for each context (single key bindings)
    default_bindings: HashMap<KeyContext, HashMap<(KeyCode, KeyModifiers), Action>>,

    /// Plugin default bindings (third tier, after custom and keymap defaults)
    /// Used for mode bindings registered by plugins via defineMode()
    plugin_defaults: HashMap<KeyContext, HashMap<(KeyCode, KeyModifiers), Action>>,

    /// Chord bindings (multi-key sequences)
    /// Maps context -> sequence -> action
    chord_bindings: HashMap<KeyContext, HashMap<Vec<(KeyCode, KeyModifiers)>, Action>>,

    /// Default chord bindings for each context
    default_chord_bindings: HashMap<KeyContext, HashMap<Vec<(KeyCode, KeyModifiers)>, Action>>,

    /// Plugin default chord bindings (for mode chord bindings from defineMode)
    plugin_chord_defaults: HashMap<KeyContext, HashMap<Vec<(KeyCode, KeyModifiers)>, Action>>,

    /// Plugin modes that want unbound keys to fall through to Normal
    /// bindings (motion, selection, copy). Populated by `defineMode` when
    /// `inheritNormalBindings: true`.
    inheriting_modes: std::collections::HashSet<String>,
}

impl KeybindingResolver {
    /// Create a new resolver from configuration
    pub fn new(config: &Config) -> Self {
        let mut resolver = Self {
            bindings: HashMap::new(),
            default_bindings: HashMap::new(),
            plugin_defaults: HashMap::new(),
            chord_bindings: HashMap::new(),
            default_chord_bindings: HashMap::new(),
            plugin_chord_defaults: HashMap::new(),
            inheriting_modes: std::collections::HashSet::new(),
        };

        // Load bindings from the active keymap (with inheritance resolution) into default_bindings
        let map_bindings = config.resolve_keymap(&config.active_keybinding_map);
        resolver.load_default_bindings_from_vec(&map_bindings);

        // Then, load custom keybindings (these override the default map bindings)
        resolver.load_bindings_from_vec(&config.keybindings);

        resolver
    }

    /// Load default bindings from a vector of keybinding definitions (into default_bindings/default_chord_bindings)
    fn load_default_bindings_from_vec(&mut self, bindings: &[crate::config::Keybinding]) {
        for binding in bindings {
            // Determine context from "when" clause
            let context = if let Some(ref when) = binding.when {
                KeyContext::from_when_clause(when).unwrap_or(KeyContext::Normal)
            } else {
                KeyContext::Normal
            };

            if let Some(action) = Action::from_str(&binding.action, &binding.args) {
                // Check if this is a chord binding (has keys field)
                if !binding.keys.is_empty() {
                    // Parse the chord sequence
                    let mut sequence = Vec::new();
                    for key_press in &binding.keys {
                        if let Some(key_code) = Self::parse_key(&key_press.key) {
                            let modifiers = Self::parse_modifiers(&key_press.modifiers);
                            sequence.push((key_code, modifiers));
                        } else {
                            // Invalid key in sequence, skip this binding
                            break;
                        }
                    }

                    // Only add if all keys in sequence were valid
                    if sequence.len() == binding.keys.len() && !sequence.is_empty() {
                        self.default_chord_bindings
                            .entry(context)
                            .or_default()
                            .insert(sequence, action);
                    }
                } else if let Some(key_code) = Self::parse_key(&binding.key) {
                    // Single key binding (legacy format)
                    let modifiers = Self::parse_modifiers(&binding.modifiers);

                    // Insert the primary binding
                    self.insert_binding_with_equivalents(
                        context,
                        key_code,
                        modifiers,
                        action,
                        &binding.key,
                    );
                }
            }
        }
    }

    /// Insert a binding and automatically add terminal key equivalents.
    /// Logs a warning if an equivalent key is already bound to a different action.
    fn insert_binding_with_equivalents(
        &mut self,
        context: KeyContext,
        key_code: KeyCode,
        modifiers: KeyModifiers,
        action: Action,
        key_name: &str,
    ) {
        let context_bindings = self.default_bindings.entry(context.clone()).or_default();

        // Insert the primary binding
        context_bindings.insert((key_code, modifiers), action.clone());

        // Get terminal key equivalents and add them as aliases
        let equivalents = terminal_key_equivalents(key_code, modifiers);
        for (equiv_key, equiv_mods) in equivalents {
            // Check if this equivalent is already bound
            if let Some(existing_action) = context_bindings.get(&(equiv_key, equiv_mods)) {
                // Only warn if bound to a DIFFERENT action
                if existing_action != &action {
                    let equiv_name = format!("{:?}", equiv_key);
                    tracing::warn!(
                        "Terminal key equivalent conflict in {:?} context: {} (equivalent of {}) \
                         is bound to {:?}, but {} is bound to {:?}. \
                         The explicit binding takes precedence.",
                        context,
                        equiv_name,
                        key_name,
                        existing_action,
                        key_name,
                        action
                    );
                }
                // Don't override explicit bindings with auto-generated equivalents
            } else {
                // Add the equivalent binding
                context_bindings.insert((equiv_key, equiv_mods), action.clone());
            }
        }
    }

    /// Load custom bindings from a vector of keybinding definitions (into bindings/chord_bindings)
    fn load_bindings_from_vec(&mut self, bindings: &[crate::config::Keybinding]) {
        for binding in bindings {
            // Determine context from "when" clause
            let context = if let Some(ref when) = binding.when {
                KeyContext::from_when_clause(when).unwrap_or(KeyContext::Normal)
            } else {
                KeyContext::Normal
            };

            if let Some(action) = Action::from_str(&binding.action, &binding.args) {
                // Check if this is a chord binding (has keys field)
                if !binding.keys.is_empty() {
                    // Parse the chord sequence
                    let mut sequence = Vec::new();
                    for key_press in &binding.keys {
                        if let Some(key_code) = Self::parse_key(&key_press.key) {
                            let modifiers = Self::parse_modifiers(&key_press.modifiers);
                            sequence.push((key_code, modifiers));
                        } else {
                            // Invalid key in sequence, skip this binding
                            break;
                        }
                    }

                    // Only add if all keys in sequence were valid
                    if sequence.len() == binding.keys.len() && !sequence.is_empty() {
                        self.chord_bindings
                            .entry(context)
                            .or_default()
                            .insert(sequence, action);
                    }
                } else if let Some(key_code) = Self::parse_key(&binding.key) {
                    // Single key binding (legacy format)
                    let modifiers = Self::parse_modifiers(&binding.modifiers);
                    self.bindings
                        .entry(context)
                        .or_default()
                        .insert((key_code, modifiers), action);
                }
            }
        }
    }

    /// Load a plugin default binding (for mode bindings registered via defineMode)
    pub fn load_plugin_default(
        &mut self,
        context: KeyContext,
        key_code: KeyCode,
        modifiers: KeyModifiers,
        action: Action,
    ) {
        self.plugin_defaults
            .entry(context)
            .or_default()
            .insert((key_code, modifiers), action);
    }

    /// Load a plugin default chord binding (for mode chord bindings from defineMode)
    pub fn load_plugin_chord_default(
        &mut self,
        context: KeyContext,
        sequence: Vec<(KeyCode, KeyModifiers)>,
        action: Action,
    ) {
        self.plugin_chord_defaults
            .entry(context)
            .or_default()
            .insert(sequence, action);
    }

    /// Clear all plugin default bindings (single-key and chord) for a specific mode
    pub fn clear_plugin_defaults_for_mode(&mut self, mode_name: &str) {
        let context = KeyContext::Mode(mode_name.to_string());
        self.plugin_defaults.remove(&context);
        self.plugin_chord_defaults.remove(&context);
        self.inheriting_modes.remove(mode_name);
    }

    /// Mark (or unmark) a plugin mode as inheriting Normal-context bindings
    /// for keys it doesn't bind itself.
    pub fn set_mode_inherits_normal_bindings(&mut self, mode_name: &str, inherit: bool) {
        if inherit {
            self.inheriting_modes.insert(mode_name.to_string());
        } else {
            self.inheriting_modes.remove(mode_name);
        }
    }

    /// Get all plugin default bindings (for keybinding editor display)
    pub fn get_plugin_defaults(
        &self,
    ) -> &HashMap<KeyContext, HashMap<(KeyCode, KeyModifiers), Action>> {
        &self.plugin_defaults
    }

    /// Check if an action is application-wide (should be accessible in all contexts)
    fn is_application_wide_action(action: &Action) -> bool {
        matches!(
            action,
            Action::Quit
                | Action::ForceQuit
                | Action::Save
                | Action::SaveAs
                | Action::ShowHelp
                | Action::ShowKeyboardShortcuts
                | Action::PromptCancel  // Esc should always cancel
                | Action::PopupCancel // Esc should always cancel
        )
    }

    /// Check if an action is a UI action that should work in terminal mode
    /// (without keyboard capture). These are general navigation and UI actions
    /// that don't involve text editing.
    pub fn is_terminal_ui_action(action: &Action) -> bool {
        matches!(
            action,
            // Global UI actions
            Action::CommandPalette
                | Action::QuickOpen
                | Action::QuickOpenBuffers
                | Action::QuickOpenFiles
                | Action::OpenLiveGrep
                | Action::ResumeLiveGrep
                | Action::LiveGrepExportQuickfix
                | Action::ToggleUtilityDock
                | Action::OpenTerminalInDock
                | Action::CycleLiveGrepProvider
                | Action::OpenSettings
                | Action::MenuActivate
                | Action::MenuOpen(_)
                | Action::ShowHelp
                | Action::ShowKeyboardShortcuts
                | Action::Quit
                | Action::ForceQuit
                // Split navigation
                | Action::NextSplit
                | Action::PrevSplit
                // Window navigation
                | Action::NextWindow
                | Action::PrevWindow
                | Action::SplitHorizontal
                | Action::SplitVertical
                | Action::CloseSplit
                | Action::ToggleMaximizeSplit
                // Tab/buffer navigation
                | Action::NextBuffer
                | Action::PrevBuffer
                | Action::Close
                | Action::CloseTab
                | Action::ScrollTabsLeft
                | Action::ScrollTabsRight
                // Terminal control
                | Action::TerminalEscape
                | Action::ToggleKeyboardCapture
                | Action::OpenTerminal
                | Action::CloseTerminal
                | Action::TerminalPaste
                // File explorer
                | Action::ToggleFileExplorer
                | Action::ToggleFileExplorerSide
                // Menu bar
                | Action::ToggleMenuBar
        )
    }

    /// Resolve a key event with chord state to check for multi-key sequences
    /// Returns:
    /// - Complete(action): The sequence is complete, execute the action
    /// - Partial: The sequence is partial (prefix of a chord), wait for more keys
    /// - NoMatch: The sequence doesn't match any chord binding
    pub fn resolve_chord(
        &self,
        chord_state: &[(KeyCode, KeyModifiers)],
        event: &KeyEvent,
        context: KeyContext,
    ) -> ChordResolution {
        // Build the full sequence: existing chord state + new key, all normalized
        let mut full_sequence: Vec<(KeyCode, KeyModifiers)> = chord_state
            .iter()
            .map(|(c, m)| normalize_key(*c, *m))
            .collect();
        let (norm_code, norm_mods) = normalize_key(event.code, event.modifiers);
        full_sequence.push((norm_code, norm_mods));

        tracing::trace!(
            "KeybindingResolver.resolve_chord: sequence={:?}, context={:?}",
            full_sequence,
            context
        );

        // Check all chord binding sources in priority order
        let search_order = vec![
            (&self.chord_bindings, &KeyContext::Global, "custom global"),
            (
                &self.default_chord_bindings,
                &KeyContext::Global,
                "default global",
            ),
            (&self.chord_bindings, &context, "custom context"),
            (&self.default_chord_bindings, &context, "default context"),
            (
                &self.plugin_chord_defaults,
                &context,
                "plugin default context",
            ),
        ];

        let mut has_partial_match = false;

        for (binding_map, bind_context, label) in search_order {
            if let Some(context_chords) = binding_map.get(bind_context) {
                // Check for exact match
                if let Some(action) = context_chords.get(&full_sequence) {
                    tracing::trace!("  -> Complete chord match in {}: {:?}", label, action);
                    return ChordResolution::Complete(action.clone());
                }

                // Check for partial match (our sequence is a prefix of any binding)
                for (chord_seq, _) in context_chords.iter() {
                    if chord_seq.len() > full_sequence.len()
                        && chord_seq[..full_sequence.len()] == full_sequence[..]
                    {
                        tracing::trace!("  -> Partial chord match in {}", label);
                        has_partial_match = true;
                        break;
                    }
                }
            }
        }

        if has_partial_match {
            ChordResolution::Partial
        } else {
            tracing::trace!("  -> No chord match");
            ChordResolution::NoMatch
        }
    }

    /// Resolve a key event to an action in the given context
    pub fn resolve(&self, event: &KeyEvent, context: KeyContext) -> Action {
        // Normalize key for lookups (e.g., BackTab+SHIFT → BackTab, Char('T')+SHIFT → Char('t')+SHIFT)
        // but keep original event for the InsertChar fallback at the end.
        let (norm_code, norm_mods) = normalize_key(event.code, event.modifiers);
        let norm = &(norm_code, norm_mods);
        tracing::trace!(
            "KeybindingResolver.resolve: code={:?}, modifiers={:?}, context={:?}",
            event.code,
            event.modifiers,
            context
        );

        // Check Global bindings first (highest priority - work in all contexts)
        if let Some(global_bindings) = self.bindings.get(&KeyContext::Global) {
            if let Some(action) = global_bindings.get(norm) {
                tracing::trace!("  -> Found in custom global bindings: {:?}", action);
                return action.clone();
            }
        }

        if let Some(global_bindings) = self.default_bindings.get(&KeyContext::Global) {
            if let Some(action) = global_bindings.get(norm) {
                tracing::trace!("  -> Found in default global bindings: {:?}", action);
                return action.clone();
            }
        }

        // Try context-specific custom bindings
        if let Some(context_bindings) = self.bindings.get(&context) {
            if let Some(action) = context_bindings.get(norm) {
                tracing::trace!(
                    "  -> Found in custom {} bindings: {:?}",
                    context.to_when_clause(),
                    action
                );
                return action.clone();
            }
        }

        // Try context-specific default bindings
        if let Some(context_bindings) = self.default_bindings.get(&context) {
            if let Some(action) = context_bindings.get(norm) {
                tracing::trace!(
                    "  -> Found in default {} bindings: {:?}",
                    context.to_when_clause(),
                    action
                );
                return action.clone();
            }
        }

        // Try plugin default bindings (mode bindings from defineMode)
        if let Some(plugin_bindings) = self.plugin_defaults.get(&context) {
            if let Some(action) = plugin_bindings.get(norm) {
                tracing::trace!(
                    "  -> Found in plugin default {} bindings: {:?}",
                    context.to_when_clause(),
                    action
                );
                return action.clone();
            }
        }

        // Fall back to Normal context bindings.
        // Contexts with allows_normal_fallthrough (e.g. CompositeBuffer) get ALL
        // Normal bindings; other contexts only get application-wide actions.
        if context != KeyContext::Normal {
            let full_fallthrough = context.allows_normal_fallthrough()
                || matches!(&context, KeyContext::Mode(name) if self.inheriting_modes.contains(name));

            let ui_fallthrough = context.allows_ui_fallthrough();

            // A user binding in Normal context shadows the default
            // Normal binding for the same key — even if the user's
            // action doesn't qualify for fallthrough (e.g. `noop` to
            // disable a default). Without this, the resolver fell
            // through to the default's application-wide entry,
            // making it impossible to disable application-wide
            // bindings like `Ctrl+Q → Quit` from a user config
            // (issue #2030).
            let custom_normal_has_binding = self
                .bindings
                .get(&KeyContext::Normal)
                .and_then(|m| m.get(norm))
                .is_some();

            if let Some(normal_bindings) = self.bindings.get(&KeyContext::Normal) {
                if let Some(action) = normal_bindings.get(norm) {
                    if full_fallthrough
                        || Self::is_application_wide_action(action)
                        || (ui_fallthrough && Self::is_terminal_ui_action(action))
                    {
                        tracing::trace!(
                            "  -> Found action in custom normal bindings (fallthrough): {:?}",
                            action
                        );
                        return action.clone();
                    }
                }
            }

            if !custom_normal_has_binding {
                if let Some(normal_bindings) = self.default_bindings.get(&KeyContext::Normal) {
                    if let Some(action) = normal_bindings.get(norm) {
                        if full_fallthrough
                            || Self::is_application_wide_action(action)
                            || (ui_fallthrough && Self::is_terminal_ui_action(action))
                        {
                            tracing::trace!(
                                "  -> Found action in default normal bindings (fallthrough): {:?}",
                                action
                            );
                            return action.clone();
                        }
                    }
                }
            }
        }

        // Handle regular character input in text input contexts
        if context.allows_text_input() && is_text_input_modifier(event.modifiers) {
            if let KeyCode::Char(c) = event.code {
                tracing::trace!("  -> Character input: '{}'", c);
                return Action::InsertChar(c);
            }
        }

        tracing::trace!("  -> No binding found, returning Action::None");
        Action::None
    }

    /// Resolve a key event looking only in the specified context (no Global fallback).
    /// This is used when a modal context (like Prompt) needs to check if it has
    /// a specific binding without being overridden by Global bindings.
    /// Returns None if no binding found in the specified context.
    pub fn resolve_in_context_only(&self, event: &KeyEvent, context: KeyContext) -> Option<Action> {
        let norm = normalize_key(event.code, event.modifiers);
        // Try custom bindings for this context
        if let Some(context_bindings) = self.bindings.get(&context) {
            if let Some(action) = context_bindings.get(&norm) {
                return Some(action.clone());
            }
        }

        // Try default bindings for this context
        if let Some(context_bindings) = self.default_bindings.get(&context) {
            if let Some(action) = context_bindings.get(&norm) {
                return Some(action.clone());
            }
        }

        None
    }

    /// `true` iff this context has its own binding for `event` —
    /// either user-customised, built-in default, or plugin-default
    /// (from `defineMode`). Unlike [`resolve`], this does **not**
    /// fall back to Global or Normal-context bindings; it's the
    /// "did someone *explicitly* claim this key for this mode"
    /// check used by `dispatch_floating_widget_key` to decide
    /// whether to let mode dispatch override its smart-key defaults.
    pub fn has_explicit_binding(&self, event: &KeyEvent, context: &KeyContext) -> bool {
        let norm = normalize_key(event.code, event.modifiers);
        if let Some(bindings) = self.bindings.get(context) {
            if bindings.contains_key(&norm) {
                return true;
            }
        }
        if let Some(bindings) = self.default_bindings.get(context) {
            if bindings.contains_key(&norm) {
                return true;
            }
        }
        if let Some(bindings) = self.plugin_defaults.get(context) {
            if bindings.contains_key(&norm) {
                return true;
            }
        }
        false
    }

    /// Resolve a key event to a UI action for terminal mode.
    /// Only returns actions that are classified as UI actions (is_terminal_ui_action).
    /// Returns Action::None if the key doesn't map to a UI action.
    pub fn resolve_terminal_ui_action(&self, event: &KeyEvent) -> Action {
        let norm = normalize_key(event.code, event.modifiers);
        tracing::trace!(
            "KeybindingResolver.resolve_terminal_ui_action: code={:?}, modifiers={:?}",
            event.code,
            event.modifiers
        );

        // Check Terminal context bindings first (highest priority for terminal mode)
        for bindings in [&self.bindings, &self.default_bindings] {
            if let Some(terminal_bindings) = bindings.get(&KeyContext::Terminal) {
                if let Some(action) = terminal_bindings.get(&norm) {
                    if Self::is_terminal_ui_action(action) {
                        tracing::trace!("  -> Found UI action in terminal bindings: {:?}", action);
                        return action.clone();
                    }
                }
            }
        }

        // Check Global bindings (work in all contexts)
        for bindings in [&self.bindings, &self.default_bindings] {
            if let Some(global_bindings) = bindings.get(&KeyContext::Global) {
                if let Some(action) = global_bindings.get(&norm) {
                    if Self::is_terminal_ui_action(action) {
                        tracing::trace!("  -> Found UI action in global bindings: {:?}", action);
                        return action.clone();
                    }
                }
            }
        }

        // Check Normal context bindings (for actions like next_split that are in Normal context)
        for bindings in [&self.bindings, &self.default_bindings] {
            if let Some(normal_bindings) = bindings.get(&KeyContext::Normal) {
                if let Some(action) = normal_bindings.get(&norm) {
                    if Self::is_terminal_ui_action(action) {
                        tracing::trace!("  -> Found UI action in normal bindings: {:?}", action);
                        return action.clone();
                    }
                }
            }
        }

        tracing::trace!("  -> No UI action found");
        Action::None
    }

    /// Find the primary keybinding for a given action (for display in menus)
    /// Returns a formatted string like "Ctrl+S" or "F12"
    pub fn find_keybinding_for_action(
        &self,
        action_name: &str,
        context: KeyContext,
    ) -> Option<String> {
        // Parse the action from the action name
        let target_action = Action::from_str(action_name, &HashMap::new())?;

        // Search in custom bindings first, then default bindings
        let search_maps = vec![
            self.bindings.get(&context),
            self.bindings.get(&KeyContext::Global),
            self.default_bindings.get(&context),
            self.default_bindings.get(&KeyContext::Global),
        ];

        for map in search_maps.into_iter().flatten() {
            // Collect all matching keybindings for deterministic selection
            let mut matches: Vec<(KeyCode, KeyModifiers)> = map
                .iter()
                .filter(|(_, action)| {
                    std::mem::discriminant(*action) == std::mem::discriminant(&target_action)
                })
                .map(|((key_code, modifiers), _)| (*key_code, *modifiers))
                .collect();

            if !matches.is_empty() {
                // Sort to get deterministic order: prefer fewer modifiers, then by key
                matches.sort_by(|(key_a, mod_a), (key_b, mod_b)| {
                    // Compare by number of modifiers first (prefer simpler bindings)
                    let mod_count_a = mod_a.bits().count_ones();
                    let mod_count_b = mod_b.bits().count_ones();
                    match mod_count_a.cmp(&mod_count_b) {
                        std::cmp::Ordering::Equal => {
                            // Then by modifier bits (for consistent ordering)
                            match mod_a.bits().cmp(&mod_b.bits()) {
                                std::cmp::Ordering::Equal => {
                                    // Finally by key code
                                    Self::key_code_sort_key(key_a)
                                        .cmp(&Self::key_code_sort_key(key_b))
                                }
                                other => other,
                            }
                        }
                        other => other,
                    }
                });

                let (key_code, modifiers) = matches[0];
                return Some(format_keybinding(&key_code, &modifiers));
            }
        }

        None
    }

    /// Generate a sort key for KeyCode to ensure deterministic ordering
    fn key_code_sort_key(key_code: &KeyCode) -> (u8, u32) {
        match key_code {
            KeyCode::Char(c) => (0, *c as u32),
            KeyCode::F(n) => (1, *n as u32),
            KeyCode::Enter => (2, 0),
            KeyCode::Tab => (2, 1),
            KeyCode::Backspace => (2, 2),
            KeyCode::Delete => (2, 3),
            KeyCode::Esc => (2, 4),
            KeyCode::Left => (3, 0),
            KeyCode::Right => (3, 1),
            KeyCode::Up => (3, 2),
            KeyCode::Down => (3, 3),
            KeyCode::Home => (3, 4),
            KeyCode::End => (3, 5),
            KeyCode::PageUp => (3, 6),
            KeyCode::PageDown => (3, 7),
            _ => (255, 0),
        }
    }

    /// Find the mnemonic character for a menu (based on Alt+letter keybindings)
    /// Returns the character that should be underlined in the menu label
    pub fn find_menu_mnemonic(&self, menu_name: &str) -> Option<char> {
        // Search in custom bindings first, then default bindings
        let search_maps = vec![
            self.bindings.get(&KeyContext::Normal),
            self.bindings.get(&KeyContext::Global),
            self.default_bindings.get(&KeyContext::Normal),
            self.default_bindings.get(&KeyContext::Global),
        ];

        for map in search_maps.into_iter().flatten() {
            for ((key_code, modifiers), action) in map {
                // Check if this is an Alt+letter binding for MenuOpen with matching name
                if let Action::MenuOpen(name) = action {
                    if name.eq_ignore_ascii_case(menu_name) && *modifiers == KeyModifiers::ALT {
                        // Return the character for Alt+letter bindings
                        if let KeyCode::Char(c) = key_code {
                            return Some(c.to_ascii_lowercase());
                        }
                    }
                }
            }
        }

        None
    }

    /// Parse a key string to KeyCode
    fn parse_key(key: &str) -> Option<KeyCode> {
        let lower = key.to_lowercase();
        match lower.as_str() {
            "enter" => Some(KeyCode::Enter),
            "backspace" => Some(KeyCode::Backspace),
            "delete" | "del" => Some(KeyCode::Delete),
            "tab" => Some(KeyCode::Tab),
            "backtab" => Some(KeyCode::BackTab),
            "esc" | "escape" => Some(KeyCode::Esc),
            "space" => Some(KeyCode::Char(' ')),

            "left" => Some(KeyCode::Left),
            "right" => Some(KeyCode::Right),
            "up" => Some(KeyCode::Up),
            "down" => Some(KeyCode::Down),
            "home" => Some(KeyCode::Home),
            "end" => Some(KeyCode::End),
            "pageup" => Some(KeyCode::PageUp),
            "pagedown" => Some(KeyCode::PageDown),

            s if s.len() == 1 => s.chars().next().map(KeyCode::Char),
            // Handle function keys like "f1", "f2", ..., "f12"
            s if s.starts_with('f') && s.len() >= 2 => s[1..].parse::<u8>().ok().map(KeyCode::F),
            _ => None,
        }
    }

    /// Parse modifiers from strings
    fn parse_modifiers(modifiers: &[String]) -> KeyModifiers {
        let mut result = KeyModifiers::empty();
        for m in modifiers {
            match m.to_lowercase().as_str() {
                "ctrl" | "control" => result |= KeyModifiers::CONTROL,
                "shift" => result |= KeyModifiers::SHIFT,
                "alt" => result |= KeyModifiers::ALT,
                "super" | "cmd" | "command" | "meta" => result |= KeyModifiers::SUPER,
                _ => {}
            }
        }
        result
    }

    /// Create default keybindings organized by context
    /// Get all keybindings (for help display)
    /// Returns a Vec of (key_description, action_description)
    pub fn get_all_bindings(&self) -> Vec<(String, String)> {
        let mut bindings = Vec::new();

        // Collect all bindings from all contexts
        for context in &[
            KeyContext::Normal,
            KeyContext::Prompt,
            KeyContext::Popup,
            KeyContext::FileExplorer,
            KeyContext::Menu,
            KeyContext::CompositeBuffer,
        ] {
            let mut all_keys: HashMap<(KeyCode, KeyModifiers), Action> = HashMap::new();

            // Start with defaults for this context
            if let Some(context_defaults) = self.default_bindings.get(context) {
                for (key, action) in context_defaults {
                    all_keys.insert(*key, action.clone());
                }
            }

            // Override with custom bindings for this context
            if let Some(context_bindings) = self.bindings.get(context) {
                for (key, action) in context_bindings {
                    all_keys.insert(*key, action.clone());
                }
            }

            // Convert to readable format with context prefix
            let context_str = if *context != KeyContext::Normal {
                format!("[{}] ", context.to_when_clause())
            } else {
                String::new()
            };

            for ((key_code, modifiers), action) in all_keys {
                let key_str = Self::format_key(key_code, modifiers);
                let action_str = format!("{}{}", context_str, Self::format_action(&action));
                bindings.push((key_str, action_str));
            }
        }

        // Sort by action description for easier browsing
        bindings.sort_by(|a, b| a.1.cmp(&b.1));

        bindings
    }

    /// Format a key combination as a readable string
    fn format_key(key_code: KeyCode, modifiers: KeyModifiers) -> String {
        format_keybinding(&key_code, &modifiers)
    }

    /// Format an action as a readable description
    pub fn format_action(action: &Action) -> String {
        match action {
            Action::InsertChar(c) => t!("action.insert_char", char = c),
            Action::InsertNewline => t!("action.insert_newline"),
            Action::InsertTab => t!("action.insert_tab"),
            Action::MoveLeft => t!("action.move_left"),
            Action::MoveRight => t!("action.move_right"),
            Action::MoveUp => t!("action.move_up"),
            Action::MoveDown => t!("action.move_down"),
            Action::MoveWordLeft => t!("action.move_word_left"),
            Action::MoveWordRight => t!("action.move_word_right"),
            Action::MoveWordEnd => t!("action.move_word_end"),
            Action::ViMoveWordEnd => t!("action.move_word_end"),
            Action::MoveLeftInLine => t!("action.move_left"),
            Action::MoveRightInLine => t!("action.move_right"),
            Action::MoveLineStart => t!("action.move_line_start"),
            Action::MoveLineEnd => t!("action.move_line_end"),
            Action::MoveLineUp => t!("action.move_line_up"),
            Action::MoveLineDown => t!("action.move_line_down"),
            Action::MovePageUp => t!("action.move_page_up"),
            Action::MovePageDown => t!("action.move_page_down"),
            Action::MoveDocumentStart => t!("action.move_document_start"),
            Action::MoveDocumentEnd => t!("action.move_document_end"),
            Action::SelectLeft => t!("action.select_left"),
            Action::SelectRight => t!("action.select_right"),
            Action::SelectUp => t!("action.select_up"),
            Action::SelectDown => t!("action.select_down"),
            Action::SelectToParagraphUp => t!("action.select_to_paragraph_up"),
            Action::SelectToParagraphDown => t!("action.select_to_paragraph_down"),
            Action::SelectWordLeft => t!("action.select_word_left"),
            Action::SelectWordRight => t!("action.select_word_right"),
            Action::SelectWordEnd => t!("action.select_word_end"),
            Action::ViSelectWordEnd => t!("action.select_word_end"),
            Action::SelectLineStart => t!("action.select_line_start"),
            Action::SelectLineEnd => t!("action.select_line_end"),
            Action::SelectDocumentStart => t!("action.select_document_start"),
            Action::SelectDocumentEnd => t!("action.select_document_end"),
            Action::SelectPageUp => t!("action.select_page_up"),
            Action::SelectPageDown => t!("action.select_page_down"),
            Action::SelectAll => t!("action.select_all"),
            Action::SelectWord => t!("action.select_word"),
            Action::SelectLine => t!("action.select_line"),
            Action::ExpandSelection => t!("action.expand_selection"),
            Action::BlockSelectLeft => t!("action.block_select_left"),
            Action::BlockSelectRight => t!("action.block_select_right"),
            Action::BlockSelectUp => t!("action.block_select_up"),
            Action::BlockSelectDown => t!("action.block_select_down"),
            Action::DeleteBackward => t!("action.delete_backward"),
            Action::DeleteForward => t!("action.delete_forward"),
            Action::DeleteWordBackward => t!("action.delete_word_backward"),
            Action::DeleteWordForward => t!("action.delete_word_forward"),
            Action::DeleteLine => t!("action.delete_line"),
            Action::DeleteToLineEnd => t!("action.delete_to_line_end"),
            Action::DeleteToLineStart => t!("action.delete_to_line_start"),
            Action::DeleteViWordEnd => t!("action.delete_word_forward"),
            Action::TransposeChars => t!("action.transpose_chars"),
            Action::OpenLine => t!("action.open_line"),
            Action::DuplicateLine => t!("action.duplicate_line"),
            Action::Recenter => t!("action.recenter"),
            Action::SetMark => t!("action.set_mark"),
            Action::Copy => t!("action.copy"),
            Action::CopyWithTheme(theme) if theme.is_empty() => t!("action.copy_with_formatting"),
            Action::CopyWithTheme(theme) => t!("action.copy_with_theme", theme = theme),
            Action::Cut => t!("action.cut"),
            Action::Paste => t!("action.paste"),
            Action::CopyFilePath => t!("action.copy_file_path"),
            Action::CopyRelativeFilePath => t!("action.copy_relative_file_path"),
            Action::YankWordForward => t!("action.yank_word_forward"),
            Action::YankWordBackward => t!("action.yank_word_backward"),
            Action::YankToLineEnd => t!("action.yank_to_line_end"),
            Action::YankToLineStart => t!("action.yank_to_line_start"),
            Action::YankViWordEnd => t!("action.yank_word_forward"),
            Action::AddCursorAbove => t!("action.add_cursor_above"),
            Action::AddCursorBelow => t!("action.add_cursor_below"),
            Action::AddCursorNextMatch => t!("action.add_cursor_next_match"),
            Action::AddCursorsToLineEnds => t!("action.add_cursors_to_line_ends"),
            Action::RemoveSecondaryCursors => t!("action.remove_secondary_cursors"),
            Action::Save => t!("action.save"),
            Action::SaveAs => t!("action.save_as"),
            Action::Open => t!("action.open"),
            Action::SwitchProject => t!("action.switch_project"),
            Action::New => t!("action.new"),
            Action::Close => t!("action.close"),
            Action::CloseTab => t!("action.close_tab"),
            Action::Quit => t!("action.quit"),
            Action::ForceQuit => t!("action.force_quit"),
            Action::Detach => t!("action.detach"),
            Action::Revert => t!("action.revert"),
            Action::ToggleAutoRevert => t!("action.toggle_auto_revert"),
            Action::FormatBuffer => t!("action.format_buffer"),
            Action::TrimTrailingWhitespace => t!("action.trim_trailing_whitespace"),
            Action::EnsureFinalNewline => t!("action.ensure_final_newline"),
            Action::GotoLine => t!("action.goto_line"),
            Action::ScanLineIndex => t!("action.scan_line_index"),
            Action::GoToMatchingBracket => t!("action.goto_matching_bracket"),
            Action::JumpToNextError => t!("action.jump_to_next_error"),
            Action::JumpToPreviousError => t!("action.jump_to_previous_error"),
            Action::SmartHome => t!("action.smart_home"),
            Action::DedentSelection => t!("action.dedent_selection"),
            Action::ToggleComment => t!("action.toggle_comment"),
            Action::DabbrevExpand => std::borrow::Cow::Borrowed("Expand abbreviation (dabbrev)"),
            Action::ToggleFold => t!("action.toggle_fold"),
            Action::SetBookmark(c) => t!("action.set_bookmark", key = c),
            Action::JumpToBookmark(c) => t!("action.jump_to_bookmark", key = c),
            Action::ClearBookmark(c) => t!("action.clear_bookmark", key = c),
            Action::ListBookmarks => t!("action.list_bookmarks"),
            Action::ToggleSearchCaseSensitive => t!("action.toggle_search_case_sensitive"),
            Action::ToggleSearchWholeWord => t!("action.toggle_search_whole_word"),
            Action::ToggleSearchRegex => t!("action.toggle_search_regex"),
            Action::ToggleSearchConfirmEach => t!("action.toggle_search_confirm_each"),
            Action::StartMacroRecording => t!("action.start_macro_recording"),
            Action::StopMacroRecording => t!("action.stop_macro_recording"),
            Action::PlayMacro(c) => t!("action.play_macro", key = c),
            Action::ToggleMacroRecording(c) => t!("action.toggle_macro_recording", key = c),
            Action::ShowMacro(c) => t!("action.show_macro", key = c),
            Action::ListMacros => t!("action.list_macros"),
            Action::PromptRecordMacro => t!("action.prompt_record_macro"),
            Action::PromptPlayMacro => t!("action.prompt_play_macro"),
            Action::PlayLastMacro => t!("action.play_last_macro"),
            Action::PromptSetBookmark => t!("action.prompt_set_bookmark"),
            Action::PromptJumpToBookmark => t!("action.prompt_jump_to_bookmark"),
            Action::Undo => t!("action.undo"),
            Action::Redo => t!("action.redo"),
            Action::ScrollUp => t!("action.scroll_up"),
            Action::ScrollDown => t!("action.scroll_down"),
            Action::ShowHelp => t!("action.show_help"),
            Action::ShowKeyboardShortcuts => t!("action.show_keyboard_shortcuts"),
            Action::ShowWarnings => t!("action.show_warnings"),
            Action::ShowStatusLog => t!("action.show_status_log"),
            Action::ShowLspStatus => t!("action.show_lsp_status"),
            Action::ShowRemoteIndicatorMenu => t!("action.show_remote_indicator_menu"),
            Action::ClearWarnings => t!("action.clear_warnings"),
            Action::CommandPalette => t!("action.command_palette"),
            Action::QuickOpen => t!("action.quick_open"),
            Action::QuickOpenBuffers => t!("action.quick_open_buffers"),
            Action::QuickOpenFiles => t!("action.quick_open_files"),
            Action::OpenLiveGrep => t!("action.open_live_grep"),
            Action::ResumeLiveGrep => t!("action.resume_live_grep"),
            Action::LiveGrepExportQuickfix => t!("action.live_grep_export_quickfix"),
            Action::ToggleUtilityDock => t!("action.toggle_utility_dock"),
            Action::OpenTerminalInDock => t!("action.open_terminal_in_dock"),
            Action::CycleLiveGrepProvider => t!("action.cycle_live_grep_provider"),
            Action::InspectThemeAtCursor => t!("action.inspect_theme_at_cursor"),
            Action::ToggleLineWrap => t!("action.toggle_line_wrap"),
            Action::ToggleCurrentLineHighlight => t!("action.toggle_current_line_highlight"),
            Action::ToggleReadOnly => t!("action.toggle_read_only"),
            Action::TogglePageView => t!("action.toggle_page_view"),
            Action::SetPageWidth => t!("action.set_page_width"),
            Action::NextBuffer => t!("action.next_buffer"),
            Action::PrevBuffer => t!("action.prev_buffer"),
            Action::NavigateBack => t!("action.navigate_back"),
            Action::NavigateForward => t!("action.navigate_forward"),
            Action::SplitHorizontal => t!("action.split_horizontal"),
            Action::SplitVertical => t!("action.split_vertical"),
            Action::CloseSplit => t!("action.close_split"),
            Action::NextSplit => t!("action.next_split"),
            Action::PrevSplit => t!("action.prev_split"),
            Action::NextWindow => t!("action.next_window"),
            Action::PrevWindow => t!("action.prev_window"),
            Action::IncreaseSplitSize => t!("action.increase_split_size"),
            Action::DecreaseSplitSize => t!("action.decrease_split_size"),
            Action::ToggleMaximizeSplit => t!("action.toggle_maximize_split"),
            Action::PromptConfirm => t!("action.prompt_confirm"),
            Action::PromptConfirmWithText(ref text) => {
                format!("{} ({})", t!("action.prompt_confirm"), text).into()
            }
            Action::PromptCancel => t!("action.prompt_cancel"),
            Action::PromptBackspace => t!("action.prompt_backspace"),
            Action::PromptDelete => t!("action.prompt_delete"),
            Action::PromptMoveLeft => t!("action.prompt_move_left"),
            Action::PromptMoveRight => t!("action.prompt_move_right"),
            Action::PromptMoveStart => t!("action.prompt_move_start"),
            Action::PromptMoveEnd => t!("action.prompt_move_end"),
            Action::PromptSelectPrev => t!("action.prompt_select_prev"),
            Action::PromptSelectNext => t!("action.prompt_select_next"),
            Action::PromptPageUp => t!("action.prompt_page_up"),
            Action::PromptPageDown => t!("action.prompt_page_down"),
            Action::PromptAcceptSuggestion => t!("action.prompt_accept_suggestion"),
            Action::PromptMoveWordLeft => t!("action.prompt_move_word_left"),
            Action::PromptMoveWordRight => t!("action.prompt_move_word_right"),
            Action::PromptDeleteWordForward => t!("action.prompt_delete_word_forward"),
            Action::PromptDeleteWordBackward => t!("action.prompt_delete_word_backward"),
            Action::PromptDeleteToLineEnd => t!("action.prompt_delete_to_line_end"),
            Action::PromptCopy => t!("action.prompt_copy"),
            Action::PromptCut => t!("action.prompt_cut"),
            Action::PromptPaste => t!("action.prompt_paste"),
            Action::PromptMoveLeftSelecting => t!("action.prompt_move_left_selecting"),
            Action::PromptMoveRightSelecting => t!("action.prompt_move_right_selecting"),
            Action::PromptMoveHomeSelecting => t!("action.prompt_move_home_selecting"),
            Action::PromptMoveEndSelecting => t!("action.prompt_move_end_selecting"),
            Action::PromptSelectWordLeft => t!("action.prompt_select_word_left"),
            Action::PromptSelectWordRight => t!("action.prompt_select_word_right"),
            Action::PromptSelectAll => t!("action.prompt_select_all"),
            Action::FileBrowserToggleHidden => t!("action.file_browser_toggle_hidden"),
            Action::FileBrowserToggleDetectEncoding => {
                t!("action.file_browser_toggle_detect_encoding")
            }
            Action::PopupSelectNext => t!("action.popup_select_next"),
            Action::PopupSelectPrev => t!("action.popup_select_prev"),
            Action::PopupPageUp => t!("action.popup_page_up"),
            Action::PopupPageDown => t!("action.popup_page_down"),
            Action::PopupConfirm => t!("action.popup_confirm"),
            Action::PopupCancel => t!("action.popup_cancel"),
            Action::PopupFocus => t!("action.popup_focus"),
            Action::CompletionAccept => t!("action.completion_accept"),
            Action::CompletionDismiss => t!("action.completion_dismiss"),
            Action::ToggleFileExplorer => t!("action.toggle_file_explorer"),
            Action::ToggleFileExplorerSide => t!("action.toggle_file_explorer_side"),
            Action::ToggleMenuBar => t!("action.toggle_menu_bar"),
            Action::ToggleTabBar => t!("action.toggle_tab_bar"),
            Action::ToggleStatusBar => t!("action.toggle_status_bar"),
            Action::TogglePromptLine => t!("action.toggle_prompt_line"),
            Action::ToggleVerticalScrollbar => t!("action.toggle_vertical_scrollbar"),
            Action::ToggleHorizontalScrollbar => t!("action.toggle_horizontal_scrollbar"),
            Action::FocusFileExplorer => t!("action.focus_file_explorer"),
            Action::FocusEditor => t!("action.focus_editor"),
            Action::FileExplorerUp => t!("action.file_explorer_up"),
            Action::FileExplorerDown => t!("action.file_explorer_down"),
            Action::FileExplorerPageUp => t!("action.file_explorer_page_up"),
            Action::FileExplorerPageDown => t!("action.file_explorer_page_down"),
            Action::FileExplorerExpand => t!("action.file_explorer_expand"),
            Action::FileExplorerCollapse => t!("action.file_explorer_collapse"),
            Action::FileExplorerOpen => t!("action.file_explorer_open"),
            Action::FileExplorerRefresh => t!("action.file_explorer_refresh"),
            Action::FileExplorerNewFile => t!("action.file_explorer_new_file"),
            Action::FileExplorerNewDirectory => t!("action.file_explorer_new_directory"),
            Action::FileExplorerDelete => t!("action.file_explorer_delete"),
            Action::FileExplorerRename => t!("action.file_explorer_rename"),
            Action::FileExplorerToggleHidden => t!("action.file_explorer_toggle_hidden"),
            Action::FileExplorerToggleGitignored => t!("action.file_explorer_toggle_gitignored"),
            Action::FileExplorerSearchClear => t!("action.file_explorer_search_clear"),
            Action::FileExplorerSearchBackspace => t!("action.file_explorer_search_backspace"),
            Action::FileExplorerCopy => t!("action.file_explorer_copy"),
            Action::FileExplorerCut => t!("action.file_explorer_cut"),
            Action::FileExplorerPaste => t!("action.file_explorer_paste"),
            Action::FileExplorerDuplicate => t!("action.file_explorer_duplicate"),
            Action::FileExplorerCopyFullPath => t!("action.file_explorer_copy_full_path"),
            Action::FileExplorerCopyRelativePath => t!("action.file_explorer_copy_relative_path"),
            Action::FileExplorerExtendSelectionUp => t!("action.file_explorer_extend_selection_up"),
            Action::FileExplorerExtendSelectionDown => {
                t!("action.file_explorer_extend_selection_down")
            }
            Action::FileExplorerToggleSelect => t!("action.file_explorer_toggle_select"),
            Action::FileExplorerSelectAll => t!("action.file_explorer_select_all"),
            Action::LspCompletion => t!("action.lsp_completion"),
            Action::LspGotoDefinition => t!("action.lsp_goto_definition"),
            Action::LspReferences => t!("action.lsp_references"),
            Action::LspRename => t!("action.lsp_rename"),
            Action::LspHover => t!("action.lsp_hover"),
            Action::LspSignatureHelp => t!("action.lsp_signature_help"),
            Action::LspCodeActions => t!("action.lsp_code_actions"),
            Action::LspRestart => t!("action.lsp_restart"),
            Action::LspStop => t!("action.lsp_stop"),
            Action::LspToggleForBuffer => t!("action.lsp_toggle_for_buffer"),
            Action::ToggleInlayHints => t!("action.toggle_inlay_hints"),
            Action::ToggleMouseHover => t!("action.toggle_mouse_hover"),
            Action::ToggleLineNumbers => t!("action.toggle_line_numbers"),
            Action::ToggleScrollSync => t!("action.toggle_scroll_sync"),
            Action::ToggleMouseCapture => t!("action.toggle_mouse_capture"),
            Action::ToggleDebugHighlights => t!("action.toggle_debug_highlights"),
            Action::SetBackground => t!("action.set_background"),
            Action::SetBackgroundBlend => t!("action.set_background_blend"),
            Action::AddRuler => t!("action.add_ruler"),
            Action::RemoveRuler => t!("action.remove_ruler"),
            Action::SetTabSize => t!("action.set_tab_size"),
            Action::SetLineEnding => t!("action.set_line_ending"),
            Action::SetEncoding => t!("action.set_encoding"),
            Action::ReloadWithEncoding => t!("action.reload_with_encoding"),
            Action::SetLanguage => t!("action.set_language"),
            Action::ToggleIndentationStyle => t!("action.toggle_indentation_style"),
            Action::ToggleTabIndicators => t!("action.toggle_tab_indicators"),
            Action::ToggleWhitespaceIndicators => t!("action.toggle_whitespace_indicators"),
            Action::ResetBufferSettings => t!("action.reset_buffer_settings"),
            Action::DumpConfig => t!("action.dump_config"),
            Action::RedrawScreen => t!("action.redraw_screen"),
            Action::Search => t!("action.search"),
            Action::FindInSelection => t!("action.find_in_selection"),
            Action::FindNext => t!("action.find_next"),
            Action::FindPrevious => t!("action.find_previous"),
            Action::FindSelectionNext => t!("action.find_selection_next"),
            Action::FindSelectionPrevious => t!("action.find_selection_previous"),
            Action::Replace => t!("action.replace"),
            Action::QueryReplace => t!("action.query_replace"),
            Action::MenuActivate => t!("action.menu_activate"),
            Action::MenuClose => t!("action.menu_close"),
            Action::MenuLeft => t!("action.menu_left"),
            Action::MenuRight => t!("action.menu_right"),
            Action::MenuUp => t!("action.menu_up"),
            Action::MenuDown => t!("action.menu_down"),
            Action::MenuExecute => t!("action.menu_execute"),
            Action::MenuOpen(name) => t!("action.menu_open", name = name),
            Action::SwitchKeybindingMap(map) => t!("action.switch_keybinding_map", map = map),
            Action::PluginAction(name) => t!("action.plugin_action", name = name),
            Action::ScrollTabsLeft => t!("action.scroll_tabs_left"),
            Action::ScrollTabsRight => t!("action.scroll_tabs_right"),
            Action::SelectTheme => t!("action.select_theme"),
            Action::SelectKeybindingMap => t!("action.select_keybinding_map"),
            Action::SelectCursorStyle => t!("action.select_cursor_style"),
            Action::SelectLocale => t!("action.select_locale"),
            Action::SwitchToPreviousTab => t!("action.switch_to_previous_tab"),
            Action::SwitchToTabByName => t!("action.switch_to_tab_by_name"),
            Action::OpenTerminal => t!("action.open_terminal"),
            Action::CloseTerminal => t!("action.close_terminal"),
            Action::FocusTerminal => t!("action.focus_terminal"),
            Action::TerminalEscape => t!("action.terminal_escape"),
            Action::ToggleKeyboardCapture => t!("action.toggle_keyboard_capture"),
            Action::TerminalPaste => t!("action.terminal_paste"),
            Action::OpenSettings => t!("action.open_settings"),
            Action::CloseSettings => t!("action.close_settings"),
            Action::SettingsSave => t!("action.settings_save"),
            Action::SettingsReset => t!("action.settings_reset"),
            Action::SettingsToggleFocus => t!("action.settings_toggle_focus"),
            Action::SettingsActivate => t!("action.settings_activate"),
            Action::SettingsSearch => t!("action.settings_search"),
            Action::SettingsHelp => t!("action.settings_help"),
            Action::SettingsIncrement => t!("action.settings_increment"),
            Action::SettingsDecrement => t!("action.settings_decrement"),
            Action::SettingsInherit => t!("action.settings_inherit"),
            Action::ShellCommand => t!("action.shell_command"),
            Action::ShellCommandReplace => t!("action.shell_command_replace"),
            Action::ToUpperCase => t!("action.to_uppercase"),
            Action::ToLowerCase => t!("action.to_lowercase"),
            Action::ToggleCase => t!("action.to_uppercase"),
            Action::SortLines => t!("action.sort_lines"),
            Action::CalibrateInput => t!("action.calibrate_input"),
            Action::EventDebug => t!("action.event_debug"),
            Action::SuspendProcess => t!("action.suspend_process"),
            Action::LoadPluginFromBuffer => "Load Plugin from Buffer".into(),
            Action::InitReload => "Reload init.ts".into(),
            Action::InitEdit => "Edit init.ts".into(),
            Action::InitCheck => "Check init.ts".into(),
            Action::OpenKeybindingEditor => "Keybinding Editor".into(),
            Action::CompositeNextHunk => t!("action.composite_next_hunk"),
            Action::CompositePrevHunk => t!("action.composite_prev_hunk"),
            Action::WorkspaceTrustTrust => "Trust This Folder".into(),
            Action::WorkspaceTrustRestrict => "Restrict This Folder".into(),
            Action::WorkspaceTrustBlock => "Block Process Execution".into(),
            Action::WorkspaceTrustPrompt => "Workspace Trust…".into(),
            Action::None => t!("action.none"),
        }
        .to_string()
    }

    /// Public wrapper for parse_key (for keybinding editor)
    pub fn parse_key_public(key: &str) -> Option<KeyCode> {
        Self::parse_key(key)
    }

    /// Public wrapper for parse_modifiers (for keybinding editor)
    pub fn parse_modifiers_public(modifiers: &[String]) -> KeyModifiers {
        Self::parse_modifiers(modifiers)
    }

    /// Format an action name string as a human-readable description.
    /// Used by the keybinding editor to display action names without needing
    /// a full Action enum parse.
    pub fn format_action_from_str(action_name: &str) -> String {
        Self::format_action_from_str_with_args(action_name, &std::collections::HashMap::new())
    }

    /// Like `format_action_from_str` but uses the provided args so parameterised
    /// actions (e.g. `menu_open` with `{"name": "File"}`) produce distinct,
    /// informative descriptions instead of a generic fallback.
    pub fn format_action_from_str_with_args(
        action_name: &str,
        args: &std::collections::HashMap<String, serde_json::Value>,
    ) -> String {
        // Try to parse as Action enum first
        if let Some(action) = Action::from_str(action_name, args) {
            Self::format_action(&action)
        } else {
            // Fallback: convert snake_case to Title Case
            action_name
                .split('_')
                .map(|word| {
                    let mut chars = word.chars();
                    match chars.next() {
                        Some(c) => {
                            let upper: String = c.to_uppercase().collect();
                            format!("{}{}", upper, chars.as_str())
                        }
                        None => String::new(),
                    }
                })
                .collect::<Vec<_>>()
                .join(" ")
        }
    }

    /// Return a sorted list of all valid action name strings.
    /// Delegates to `Action::all_action_names()` which is generated by the
    /// `define_action_str_mapping!` macro (same source of truth as `Action::from_str`).
    pub fn all_action_names() -> Vec<String> {
        Action::all_action_names()
    }

    /// Get the keybinding string for an action in a specific context
    /// Returns the first keybinding found (prioritizing custom bindings over defaults)
    /// When multiple keybindings exist for the same action, prefers canonical keys over
    /// terminal equivalents (e.g., "Space" over "@")
    /// Returns None if no binding is found
    pub fn get_keybinding_for_action(
        &self,
        action: &Action,
        context: KeyContext,
    ) -> Option<String> {
        self.get_keybinding_event_for_action(action, context)
            .map(|(k, m)| format_keybinding(&k, &m))
    }

    /// Raw-event counterpart to `get_keybinding_for_action`: returns the
    /// `(KeyCode, KeyModifiers)` pair bound to `action` in `context` — or
    /// falls through to the same Normal-context chain the string version
    /// does — so callers (notably tests simulating user input) can feed
    /// the bound key through the editor's key dispatcher without
    /// hardcoding a default that a rebind would invalidate.
    pub fn get_keybinding_event_for_action(
        &self,
        action: &Action,
        context: KeyContext,
    ) -> Option<(KeyCode, KeyModifiers)> {
        // Helper to collect all matching keybindings from a map and pick the best one
        fn find_best_keybinding(
            bindings: &HashMap<(KeyCode, KeyModifiers), Action>,
            action: &Action,
        ) -> Option<(KeyCode, KeyModifiers)> {
            let matches: Vec<_> = bindings
                .iter()
                .filter(|(_, a)| *a == action)
                .map(|((k, m), _)| (*k, *m))
                .collect();

            if matches.is_empty() {
                return None;
            }

            // Sort to prefer canonical keys over terminal equivalents
            // Terminal equivalents like '@' (for space), '7' (for '/'), etc. should be deprioritized
            let mut sorted = matches;
            sorted.sort_by(|(k1, m1), (k2, m2)| {
                let score1 = keybinding_priority_score(k1);
                let score2 = keybinding_priority_score(k2);
                // Lower score = higher priority
                match score1.cmp(&score2) {
                    std::cmp::Ordering::Equal => {
                        // Tie-break by formatted string for full determinism
                        let s1 = format_keybinding(k1, m1);
                        let s2 = format_keybinding(k2, m2);
                        s1.cmp(&s2)
                    }
                    other => other,
                }
            });

            sorted.into_iter().next()
        }

        // Check custom bindings first (higher priority)
        if let Some(context_bindings) = self.bindings.get(&context) {
            if let Some(hit) = find_best_keybinding(context_bindings, action) {
                return Some(hit);
            }
        }

        // Check default bindings for this context
        if let Some(context_bindings) = self.default_bindings.get(&context) {
            if let Some(hit) = find_best_keybinding(context_bindings, action) {
                return Some(hit);
            }
        }

        // For certain contexts, also check Normal context for fallthrough actions
        if context != KeyContext::Normal
            && (context.allows_normal_fallthrough()
                || Self::is_application_wide_action(action)
                || (context.allows_ui_fallthrough() && Self::is_terminal_ui_action(action)))
        {
            // Check custom normal bindings
            if let Some(normal_bindings) = self.bindings.get(&KeyContext::Normal) {
                if let Some(hit) = find_best_keybinding(normal_bindings, action) {
                    return Some(hit);
                }
            }

            // Check default normal bindings
            if let Some(normal_bindings) = self.default_bindings.get(&KeyContext::Normal) {
                if let Some(hit) = find_best_keybinding(normal_bindings, action) {
                    return Some(hit);
                }
            }
        }

        None
    }

    /// Reload bindings from config (for hot reload)
    pub fn reload(&mut self, config: &Config) {
        self.bindings.clear();
        for binding in &config.keybindings {
            if let Some(key_code) = Self::parse_key(&binding.key) {
                let modifiers = Self::parse_modifiers(&binding.modifiers);
                if let Some(action) = Action::from_str(&binding.action, &binding.args) {
                    // Determine context from "when" clause
                    let context = if let Some(ref when) = binding.when {
                        KeyContext::from_when_clause(when).unwrap_or(KeyContext::Normal)
                    } else {
                        KeyContext::Normal
                    };

                    self.bindings
                        .entry(context)
                        .or_default()
                        .insert((key_code, modifiers), action);
                }
            }
        }
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_parse_key() {
        assert_eq!(KeybindingResolver::parse_key("enter"), Some(KeyCode::Enter));
        assert_eq!(
            KeybindingResolver::parse_key("backspace"),
            Some(KeyCode::Backspace)
        );
        assert_eq!(KeybindingResolver::parse_key("tab"), Some(KeyCode::Tab));
        assert_eq!(
            KeybindingResolver::parse_key("backtab"),
            Some(KeyCode::BackTab)
        );
        assert_eq!(
            KeybindingResolver::parse_key("BackTab"),
            Some(KeyCode::BackTab)
        );
        assert_eq!(KeybindingResolver::parse_key("a"), Some(KeyCode::Char('a')));
    }

    #[test]
    fn test_parse_modifiers() {
        let mods = vec!["ctrl".to_string()];
        assert_eq!(
            KeybindingResolver::parse_modifiers(&mods),
            KeyModifiers::CONTROL
        );

        let mods = vec!["ctrl".to_string(), "shift".to_string()];
        assert_eq!(
            KeybindingResolver::parse_modifiers(&mods),
            KeyModifiers::CONTROL | KeyModifiers::SHIFT
        );
    }

    #[test]
    fn test_format_action_from_str_distinguishes_menu_open_by_name() {
        // Regression test for #1407: all menu_open bindings used to render with
        // the identical "Menu Open" fallback because the args weren't considered.
        let mut file_args = HashMap::new();
        file_args.insert(
            "name".to_string(),
            serde_json::Value::String("File".to_string()),
        );
        let mut edit_args = HashMap::new();
        edit_args.insert(
            "name".to_string(),
            serde_json::Value::String("Edit".to_string()),
        );

        let file_display =
            KeybindingResolver::format_action_from_str_with_args("menu_open", &file_args);
        let edit_display =
            KeybindingResolver::format_action_from_str_with_args("menu_open", &edit_args);
        let no_args_display = KeybindingResolver::format_action_from_str("menu_open");

        assert_ne!(
            file_display, edit_display,
            "menu_open with different names should produce different descriptions"
        );
        assert!(
            file_display.contains("File"),
            "expected the File menu description to contain \"File\", got {file_display:?}"
        );
        assert!(
            edit_display.contains("Edit"),
            "expected the Edit menu description to contain \"Edit\", got {edit_display:?}"
        );
        // Without args the parameterised action can't be reconstructed, so the
        // generic fallback is used — which is the bug this fix routes around
        // whenever callers have the args available.
        assert_eq!(no_args_display, "Menu Open");
    }

    #[test]
    fn test_format_action_word_end_actions_are_localized() {
        // Regression test for #1878: `action.move_word_end` and
        // `action.select_word_end` were referenced via `t!()` from
        // `format_action` but missing from every locale file, so the
        // Keyboard Shortcuts menu rendered the raw key as the description.
        crate::i18n::set_locale("en");

        let move_desc = KeybindingResolver::format_action(&Action::MoveWordEnd);
        assert_ne!(
            move_desc, "action.move_word_end",
            "MoveWordEnd should resolve to a translated description"
        );
        let select_desc = KeybindingResolver::format_action(&Action::SelectWordEnd);
        assert_ne!(
            select_desc, "action.select_word_end",
            "SelectWordEnd should resolve to a translated description"
        );

        // Vim aliases share the same translation keys.
        assert_eq!(
            KeybindingResolver::format_action(&Action::ViMoveWordEnd),
            move_desc,
        );
        assert_eq!(
            KeybindingResolver::format_action(&Action::ViSelectWordEnd),
            select_desc,
        );
    }

    #[test]
    fn test_qualify_and_unqualify_roundtrip_menu_open() {
        let mut args = HashMap::new();
        args.insert(
            "name".to_string(),
            serde_json::Value::String("File".to_string()),
        );

        let qualified = Action::qualify_action("menu_open", &args);
        assert_eq!(qualified, "menu_open:File");

        let (bare, parsed_args) = Action::unqualify_action(&qualified);
        assert_eq!(bare, "menu_open");
        assert_eq!(
            parsed_args.get("name").and_then(|v| v.as_str()),
            Some("File")
        );
    }

    #[test]
    fn test_qualify_action_passthrough_for_unparameterised() {
        // Non-parameterised actions should round-trip as-is, with no suffix.
        let args = HashMap::new();
        assert_eq!(Action::qualify_action("save", &args), "save");
        let (bare, parsed) = Action::unqualify_action("save");
        assert_eq!(bare, "save");
        assert!(parsed.is_empty());
    }

    #[test]
    fn test_qualify_action_no_suffix_when_arg_missing() {
        // A parameterised action without its variant arg keeps the bare form —
        // caller (the editor) treats this as "needs a variant picked".
        let args = HashMap::new();
        assert_eq!(Action::qualify_action("menu_open", &args), "menu_open");
    }

    #[test]
    fn test_unqualify_action_ignores_colon_on_unknown_action() {
        // Plugin action names aren't the variant-arg kind, so the colon must
        // not be treated as a variant separator.
        let (bare, parsed) = Action::unqualify_action("my_plugin:action_with:colons");
        assert_eq!(bare, "my_plugin:action_with:colons");
        assert!(parsed.is_empty());
    }

    #[test]
    fn test_to_qualified_action_str_for_menu_open() {
        let action = Action::MenuOpen("Edit".to_string());
        assert_eq!(action.to_qualified_action_str(), "menu_open:Edit");
    }

    #[test]
    fn test_resolve_basic() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        let event = KeyEvent::new(KeyCode::Left, KeyModifiers::empty());
        assert_eq!(
            resolver.resolve(&event, KeyContext::Normal),
            Action::MoveLeft
        );

        let event = KeyEvent::new(KeyCode::Char('a'), KeyModifiers::empty());
        assert_eq!(
            resolver.resolve(&event, KeyContext::Normal),
            Action::InsertChar('a')
        );
    }

    /// Editor-global navigation actions (split nav, save, palette, …)
    /// must resolve when a plugin `Mode(_)` context is active, even
    /// though the mode itself doesn't bind those keys. Without this,
    /// focus inside a panel (search/replace, dashboard, git log, …)
    /// swallows `Alt+]`, `Ctrl+S`, `Ctrl+P`, etc. Regression guard for
    /// §18 of `docs/internal/search-replace-scope-replan-on-widgets.md`.
    #[test]
    fn test_panel_mode_passthrough_for_ui_actions() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);
        let mode_ctx = KeyContext::Mode("search-replace-list".to_string());

        // Alt+] is bound to next_split in the keymap (Normal context).
        let alt_close = KeyEvent::new(KeyCode::Char(']'), KeyModifiers::ALT);
        assert_eq!(
            resolver.resolve(&alt_close, mode_ctx.clone()),
            Action::NextSplit,
            "Alt+] should fall through to next_split inside a panel mode"
        );

        // Alt+[ → prev_split.
        let alt_open = KeyEvent::new(KeyCode::Char('['), KeyModifiers::ALT);
        assert_eq!(
            resolver.resolve(&alt_open, mode_ctx.clone()),
            Action::PrevSplit,
            "Alt+[ should fall through to prev_split inside a panel mode"
        );

        // Ctrl+S is application-wide (covered by `is_application_wide_action`),
        // but also `is_terminal_ui_action`-true — verify the UI fallthrough
        // path doesn't accidentally exclude it.
        let ctrl_s = KeyEvent::new(KeyCode::Char('s'), KeyModifiers::CONTROL);
        assert_eq!(
            resolver.resolve(&ctrl_s, mode_ctx.clone()),
            Action::Save,
            "Ctrl+S should still save while a panel mode is active"
        );

        // Editing actions on the source buffer must NOT pass through.
        // Ctrl+D (add cursor next match) is editor-only and absent from
        // `is_terminal_ui_action`.
        let ctrl_d = KeyEvent::new(KeyCode::Char('d'), KeyModifiers::CONTROL);
        assert_ne!(
            resolver.resolve(&ctrl_d, mode_ctx),
            Action::AddCursorNextMatch,
            "Ctrl+D (add cursor next match) must not pass through to a panel mode"
        );
    }

    #[test]
    fn test_shift_backspace_matches_backspace() {
        // Regression test for https://github.com/sinelaw/fresh/issues/1588
        // Shift+Backspace should resolve to the same action as plain Backspace
        // in every context where Backspace has a binding.
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        let backspace = KeyEvent::new(KeyCode::Backspace, KeyModifiers::empty());
        let shift_backspace = KeyEvent::new(KeyCode::Backspace, KeyModifiers::SHIFT);

        // Normal context: backspace deletes backward
        assert_eq!(
            resolver.resolve(&backspace, KeyContext::Normal),
            Action::DeleteBackward,
            "Backspace should resolve to DeleteBackward in Normal context"
        );
        assert_eq!(
            resolver.resolve(&shift_backspace, KeyContext::Normal),
            Action::DeleteBackward,
            "Shift+Backspace should resolve to DeleteBackward (same as Backspace) in Normal context"
        );

        // Prompt context: prompt_backspace
        assert_eq!(
            resolver.resolve(&backspace, KeyContext::Prompt),
            Action::PromptBackspace,
            "Backspace should resolve to PromptBackspace in Prompt context"
        );
        assert_eq!(
            resolver.resolve(&shift_backspace, KeyContext::Prompt),
            Action::PromptBackspace,
            "Shift+Backspace should resolve to PromptBackspace (same as Backspace) in Prompt context"
        );

        // FileExplorer context: file_explorer_search_backspace
        assert_eq!(
            resolver.resolve(&backspace, KeyContext::FileExplorer),
            Action::FileExplorerSearchBackspace,
            "Backspace should resolve to FileExplorerSearchBackspace in FileExplorer context"
        );
        assert_eq!(
            resolver.resolve(&shift_backspace, KeyContext::FileExplorer),
            Action::FileExplorerSearchBackspace,
            "Shift+Backspace should resolve to FileExplorerSearchBackspace (same as Backspace) in FileExplorer context"
        );
    }

    #[test]
    fn test_file_explorer_ui_fallthrough() {
        // Regression test for https://github.com/sinelaw/fresh/issues/1903
        // From the FileExplorer context, application-level UI / navigation
        // bindings (next/prev buffer, scroll tabs, close tab, next/prev
        // split, ...) bound only in Normal must still fire — the user
        // expects to act on the "tabbed files" without first transferring
        // focus out of the explorer.
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        let cases = [
            (
                KeyCode::PageUp,
                KeyModifiers::CONTROL,
                Action::PrevBuffer,
                "Ctrl+PageUp -> prev_buffer",
            ),
            (
                KeyCode::PageDown,
                KeyModifiers::CONTROL,
                Action::NextBuffer,
                "Ctrl+PageDown -> next_buffer",
            ),
            (
                KeyCode::PageUp,
                KeyModifiers::ALT,
                Action::ScrollTabsLeft,
                "Alt+PageUp -> scroll_tabs_left",
            ),
            (
                KeyCode::PageDown,
                KeyModifiers::ALT,
                Action::ScrollTabsRight,
                "Alt+PageDown -> scroll_tabs_right",
            ),
            (
                KeyCode::Char('w'),
                KeyModifiers::ALT,
                Action::CloseTab,
                "Alt+W -> close_tab",
            ),
        ];

        for (code, mods, expected, label) in cases {
            let event = KeyEvent::new(code, mods);
            assert_eq!(
                resolver.resolve(&event, KeyContext::FileExplorer),
                expected,
                "{label} should fall through from FileExplorer to Normal"
            );
        }

        // Cursor-level Normal bindings (e.g. arrow keys for cursor movement)
        // must NOT fall through — the explorer has its own arrow handlers.
        // Up arrow in FileExplorer is bound to file_explorer_up; verify
        // the explorer binding wins over a hypothetical Normal MoveUp.
        let up = KeyEvent::new(KeyCode::Up, KeyModifiers::empty());
        assert_eq!(
            resolver.resolve(&up, KeyContext::FileExplorer),
            Action::FileExplorerUp,
            "Up must continue to navigate the explorer, not move the cursor"
        );

        // Plain InsertChar fallthrough must NOT happen for non-UI Normal
        // bindings: 'd' (without Alt/Ctrl) is part of FileExplorer text
        // input (search-as-you-type), it must remain InsertChar and not
        // resolve to AddCursorNextMatch (Ctrl+D) or anything else.
        let plain_d = KeyEvent::new(KeyCode::Char('d'), KeyModifiers::empty());
        assert_eq!(
            resolver.resolve(&plain_d, KeyContext::FileExplorer),
            Action::InsertChar('d'),
            "Plain 'd' must remain text input for explorer search-as-you-type"
        );
    }

    #[test]
    fn test_action_from_str() {
        let args = HashMap::new();
        assert_eq!(Action::from_str("move_left", &args), Some(Action::MoveLeft));
        assert_eq!(Action::from_str("save", &args), Some(Action::Save));
        // Unknown action names are treated as plugin actions
        assert_eq!(
            Action::from_str("unknown", &args),
            Some(Action::PluginAction("unknown".to_string()))
        );

        // Test new context-specific actions
        assert_eq!(
            Action::from_str("keyboard_shortcuts", &args),
            Some(Action::ShowKeyboardShortcuts)
        );
        assert_eq!(
            Action::from_str("prompt_confirm", &args),
            Some(Action::PromptConfirm)
        );
        assert_eq!(
            Action::from_str("popup_cancel", &args),
            Some(Action::PopupCancel)
        );

        // Test calibrate_input action
        assert_eq!(
            Action::from_str("calibrate_input", &args),
            Some(Action::CalibrateInput)
        );
    }

    #[test]
    fn test_key_context_from_when_clause() {
        assert_eq!(
            KeyContext::from_when_clause("normal"),
            Some(KeyContext::Normal)
        );
        assert_eq!(
            KeyContext::from_when_clause("prompt"),
            Some(KeyContext::Prompt)
        );
        assert_eq!(
            KeyContext::from_when_clause("popup"),
            Some(KeyContext::Popup)
        );
        assert_eq!(KeyContext::from_when_clause("help"), None);
        assert_eq!(KeyContext::from_when_clause("  help  "), None); // Test trimming
        assert_eq!(KeyContext::from_when_clause("unknown"), None);
        assert_eq!(KeyContext::from_when_clause(""), None);
    }

    #[test]
    fn test_key_context_to_when_clause() {
        assert_eq!(KeyContext::Normal.to_when_clause(), "normal");
        assert_eq!(KeyContext::Prompt.to_when_clause(), "prompt");
        assert_eq!(KeyContext::Popup.to_when_clause(), "popup");
    }

    #[test]
    fn test_context_specific_bindings() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        // Test prompt context bindings
        let enter_event = KeyEvent::new(KeyCode::Enter, KeyModifiers::empty());
        assert_eq!(
            resolver.resolve(&enter_event, KeyContext::Prompt),
            Action::PromptConfirm
        );
        assert_eq!(
            resolver.resolve(&enter_event, KeyContext::Normal),
            Action::InsertNewline
        );

        // Test popup context bindings
        let up_event = KeyEvent::new(KeyCode::Up, KeyModifiers::empty());
        assert_eq!(
            resolver.resolve(&up_event, KeyContext::Popup),
            Action::PopupSelectPrev
        );
        assert_eq!(
            resolver.resolve(&up_event, KeyContext::Normal),
            Action::MoveUp
        );
    }

    #[test]
    fn test_context_fallback_to_normal() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        // Ctrl+S should work in all contexts (falls back to normal)
        let save_event = KeyEvent::new(KeyCode::Char('s'), KeyModifiers::CONTROL);
        assert_eq!(
            resolver.resolve(&save_event, KeyContext::Normal),
            Action::Save
        );
        assert_eq!(
            resolver.resolve(&save_event, KeyContext::Popup),
            Action::Save
        );
        // Note: Prompt context might handle this differently in practice
    }

    #[test]
    fn test_context_priority_resolution() {
        use crate::config::Keybinding;

        // Create a config with a custom binding that overrides default in help context
        let mut config = Config::default();
        config.keybindings.push(Keybinding {
            key: "esc".to_string(),
            modifiers: vec![],
            keys: vec![],
            action: "quit".to_string(), // Override Esc in popup context to quit
            args: HashMap::new(),
            when: Some("popup".to_string()),
        });

        let resolver = KeybindingResolver::new(&config);
        let esc_event = KeyEvent::new(KeyCode::Esc, KeyModifiers::empty());

        // In popup context, custom binding should override default PopupCancel
        assert_eq!(
            resolver.resolve(&esc_event, KeyContext::Popup),
            Action::Quit
        );

        // In normal context, should still be RemoveSecondaryCursors
        assert_eq!(
            resolver.resolve(&esc_event, KeyContext::Normal),
            Action::RemoveSecondaryCursors
        );
    }

    #[test]
    fn test_character_input_in_contexts() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        let char_event = KeyEvent::new(KeyCode::Char('a'), KeyModifiers::empty());

        // Character input should work in Normal and Prompt contexts
        assert_eq!(
            resolver.resolve(&char_event, KeyContext::Normal),
            Action::InsertChar('a')
        );
        assert_eq!(
            resolver.resolve(&char_event, KeyContext::Prompt),
            Action::InsertChar('a')
        );

        // But not in Popup contexts (returns None)
        assert_eq!(
            resolver.resolve(&char_event, KeyContext::Popup),
            Action::None
        );
    }

    #[test]
    fn test_custom_keybinding_loading() {
        use crate::config::Keybinding;

        let mut config = Config::default();

        // Add a custom keybinding for normal context
        config.keybindings.push(Keybinding {
            key: "f".to_string(),
            modifiers: vec!["ctrl".to_string()],
            keys: vec![],
            action: "command_palette".to_string(),
            args: HashMap::new(),
            when: None, // Default to normal context
        });

        let resolver = KeybindingResolver::new(&config);

        // Test normal context custom binding
        let ctrl_f = KeyEvent::new(KeyCode::Char('f'), KeyModifiers::CONTROL);
        assert_eq!(
            resolver.resolve(&ctrl_f, KeyContext::Normal),
            Action::CommandPalette
        );

        // Test prompt context custom binding
        let ctrl_k = KeyEvent::new(KeyCode::Char('k'), KeyModifiers::CONTROL);
        assert_eq!(
            resolver.resolve(&ctrl_k, KeyContext::Prompt),
            Action::PromptDeleteToLineEnd
        );
        assert_eq!(
            resolver.resolve(&ctrl_k, KeyContext::Normal),
            Action::DeleteToLineEnd
        );
    }

    #[test]
    fn test_all_context_default_bindings_exist() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        // Verify that default bindings exist for all contexts
        assert!(resolver.default_bindings.contains_key(&KeyContext::Normal));
        assert!(resolver.default_bindings.contains_key(&KeyContext::Prompt));
        assert!(resolver.default_bindings.contains_key(&KeyContext::Popup));
        assert!(resolver
            .default_bindings
            .contains_key(&KeyContext::FileExplorer));
        assert!(resolver.default_bindings.contains_key(&KeyContext::Menu));

        // Verify each context has some bindings
        assert!(!resolver.default_bindings[&KeyContext::Normal].is_empty());
        assert!(!resolver.default_bindings[&KeyContext::Prompt].is_empty());
        assert!(!resolver.default_bindings[&KeyContext::Popup].is_empty());
        assert!(!resolver.default_bindings[&KeyContext::FileExplorer].is_empty());
        assert!(!resolver.default_bindings[&KeyContext::Menu].is_empty());
    }

    /// Validate that every action name in every built-in keymap resolves to a
    /// known built-in action, not a `PluginAction`.  This catches typos like
    /// `"prompt_delete_to_end"` (should be `"prompt_delete_to_line_end"`).
    ///
    /// A built-in keymap may also legitimately bind to a plugin action when
    /// the plugin ships with the editor and the host has no native equivalent
    /// (e.g. Alt+A → search/replace, see §10 of
    /// docs/internal/search-replace-scope-replan-on-widgets.md). Such actions
    /// are listed in `ALLOWED_PLUGIN_ACTIONS_IN_DEFAULTS` below; any new
    /// addition must be added there explicitly so genuine typos still fail.
    #[test]
    fn test_all_builtin_keymaps_have_valid_action_names() {
        let known_actions: std::collections::HashSet<String> =
            Action::all_action_names().into_iter().collect();

        const ALLOWED_PLUGIN_ACTIONS_IN_DEFAULTS: &[&str] = &["start_search_replace"];

        let config = Config::default();

        for map_name in crate::config::KeybindingMapName::BUILTIN_OPTIONS {
            let bindings = config.resolve_keymap(map_name);
            for binding in &bindings {
                let is_known_builtin = known_actions.contains(&binding.action);
                let is_allowed_plugin =
                    ALLOWED_PLUGIN_ACTIONS_IN_DEFAULTS.contains(&binding.action.as_str());
                assert!(
                    is_known_builtin || is_allowed_plugin,
                    "Keymap '{}' contains unknown action '{}' (key: '{}', when: {:?}). \
                     This will be treated as a plugin action at runtime. \
                     Check for typos in the keymap JSON file, or add the action to \
                     ALLOWED_PLUGIN_ACTIONS_IN_DEFAULTS if it's an intentional \
                     plugin-action binding.",
                    map_name,
                    binding.action,
                    binding.key,
                    binding.when,
                );
            }
        }
    }

    #[test]
    fn test_resolve_determinism() {
        // Property: Resolving the same key in the same context should always return the same action
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        let test_cases = vec![
            (KeyCode::Left, KeyModifiers::empty(), KeyContext::Normal),
            (
                KeyCode::Esc,
                KeyModifiers::empty(),
                KeyContext::FileExplorer,
            ),
            (KeyCode::Enter, KeyModifiers::empty(), KeyContext::Prompt),
            (KeyCode::Down, KeyModifiers::empty(), KeyContext::Popup),
        ];

        for (key_code, modifiers, context) in test_cases {
            let event = KeyEvent::new(key_code, modifiers);
            let action1 = resolver.resolve(&event, context.clone());
            let action2 = resolver.resolve(&event, context.clone());
            let action3 = resolver.resolve(&event, context);

            assert_eq!(action1, action2, "Resolve should be deterministic");
            assert_eq!(action2, action3, "Resolve should be deterministic");
        }
    }

    #[test]
    fn test_modifier_combinations() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        // Test that modifier combinations are distinguished correctly
        let char_s = KeyCode::Char('s');

        let no_mod = KeyEvent::new(char_s, KeyModifiers::empty());
        let ctrl = KeyEvent::new(char_s, KeyModifiers::CONTROL);
        let shift = KeyEvent::new(char_s, KeyModifiers::SHIFT);
        let ctrl_shift = KeyEvent::new(char_s, KeyModifiers::CONTROL | KeyModifiers::SHIFT);

        let action_no_mod = resolver.resolve(&no_mod, KeyContext::Normal);
        let action_ctrl = resolver.resolve(&ctrl, KeyContext::Normal);
        let action_shift = resolver.resolve(&shift, KeyContext::Normal);
        let action_ctrl_shift = resolver.resolve(&ctrl_shift, KeyContext::Normal);

        // These should all be different actions (or at least distinguishable)
        assert_eq!(action_no_mod, Action::InsertChar('s'));
        assert_eq!(action_ctrl, Action::Save);
        assert_eq!(action_shift, Action::InsertChar('s')); // Shift alone is still character input
                                                           // Ctrl+Shift+S is not bound by default, should return None
        assert_eq!(action_ctrl_shift, Action::None);
    }

    #[test]
    fn test_scroll_keybindings() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        // Test Ctrl+Up -> ScrollUp
        let ctrl_up = KeyEvent::new(KeyCode::Up, KeyModifiers::CONTROL);
        assert_eq!(
            resolver.resolve(&ctrl_up, KeyContext::Normal),
            Action::ScrollUp,
            "Ctrl+Up should resolve to ScrollUp"
        );

        // Test Ctrl+Down -> ScrollDown
        let ctrl_down = KeyEvent::new(KeyCode::Down, KeyModifiers::CONTROL);
        assert_eq!(
            resolver.resolve(&ctrl_down, KeyContext::Normal),
            Action::ScrollDown,
            "Ctrl+Down should resolve to ScrollDown"
        );
    }

    #[test]
    fn test_lsp_completion_keybinding() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        // Test Ctrl+Space -> LspCompletion
        let ctrl_space = KeyEvent::new(KeyCode::Char(' '), KeyModifiers::CONTROL);
        assert_eq!(
            resolver.resolve(&ctrl_space, KeyContext::Normal),
            Action::LspCompletion,
            "Ctrl+Space should resolve to LspCompletion"
        );
    }

    #[test]
    fn test_terminal_key_equivalents() {
        // Test that terminal_key_equivalents returns correct mappings
        let ctrl = KeyModifiers::CONTROL;

        // Ctrl+/ <-> Ctrl+7
        let slash_equivs = terminal_key_equivalents(KeyCode::Char('/'), ctrl);
        assert_eq!(slash_equivs, vec![(KeyCode::Char('7'), ctrl)]);

        let seven_equivs = terminal_key_equivalents(KeyCode::Char('7'), ctrl);
        assert_eq!(seven_equivs, vec![(KeyCode::Char('/'), ctrl)]);

        // Ctrl+Backspace <-> Ctrl+H
        let backspace_equivs = terminal_key_equivalents(KeyCode::Backspace, ctrl);
        assert_eq!(backspace_equivs, vec![(KeyCode::Char('h'), ctrl)]);

        let h_equivs = terminal_key_equivalents(KeyCode::Char('h'), ctrl);
        assert_eq!(h_equivs, vec![(KeyCode::Backspace, ctrl)]);

        // No equivalents for regular keys
        let a_equivs = terminal_key_equivalents(KeyCode::Char('a'), ctrl);
        assert!(a_equivs.is_empty());

        // No equivalents without Ctrl
        let slash_no_ctrl = terminal_key_equivalents(KeyCode::Char('/'), KeyModifiers::empty());
        assert!(slash_no_ctrl.is_empty());
    }

    #[test]
    fn test_terminal_key_equivalents_auto_binding() {
        let config = Config::default();
        let resolver = KeybindingResolver::new(&config);

        // Ctrl+/ should be bound to toggle_comment
        let ctrl_slash = KeyEvent::new(KeyCode::Char('/'), KeyModifiers::CONTROL);
        let action_slash = resolver.resolve(&ctrl_slash, KeyContext::Normal);
        assert_eq!(
            action_slash,
            Action::ToggleComment,
            "Ctrl+/ should resolve to ToggleComment"
        );

        // Ctrl+7 should also be bound to toggle_comment (auto-generated equivalent)
        let ctrl_7 = KeyEvent::new(KeyCode::Char('7'), KeyModifiers::CONTROL);
        let action_7 = resolver.resolve(&ctrl_7, KeyContext::Normal);
        assert_eq!(
            action_7,
            Action::ToggleComment,
            "Ctrl+7 should resolve to ToggleComment (terminal equivalent of Ctrl+/)"
        );
    }

    #[test]
    fn test_terminal_key_equivalents_normalization() {
        // This test verifies that all terminal key equivalents are correctly mapped
        // These mappings exist because terminals send different key codes for certain
        // key combinations due to historical terminal emulation reasons.

        let ctrl = KeyModifiers::CONTROL;

        // === Ctrl+/ <-> Ctrl+7 ===
        // Most terminals send Ctrl+7 (0x1F) when user presses Ctrl+/
        let slash_equivs = terminal_key_equivalents(KeyCode::Char('/'), ctrl);
        assert_eq!(
            slash_equivs,
            vec![(KeyCode::Char('7'), ctrl)],
            "Ctrl+/ should map to Ctrl+7"
        );
        let seven_equivs = terminal_key_equivalents(KeyCode::Char('7'), ctrl);
        assert_eq!(
            seven_equivs,
            vec![(KeyCode::Char('/'), ctrl)],
            "Ctrl+7 should map back to Ctrl+/"
        );

        // === Ctrl+Backspace <-> Ctrl+H ===
        // Many terminals send Ctrl+H (0x08, ASCII backspace) for Ctrl+Backspace
        let backspace_equivs = terminal_key_equivalents(KeyCode::Backspace, ctrl);
        assert_eq!(
            backspace_equivs,
            vec![(KeyCode::Char('h'), ctrl)],
            "Ctrl+Backspace should map to Ctrl+H"
        );
        let h_equivs = terminal_key_equivalents(KeyCode::Char('h'), ctrl);
        assert_eq!(
            h_equivs,
            vec![(KeyCode::Backspace, ctrl)],
            "Ctrl+H should map back to Ctrl+Backspace"
        );

        // === Ctrl+Space <-> Ctrl+@ ===
        // Ctrl+Space sends NUL (0x00), same as Ctrl+@
        let space_equivs = terminal_key_equivalents(KeyCode::Char(' '), ctrl);
        assert_eq!(
            space_equivs,
            vec![(KeyCode::Char('@'), ctrl)],
            "Ctrl+Space should map to Ctrl+@"
        );
        let at_equivs = terminal_key_equivalents(KeyCode::Char('@'), ctrl);
        assert_eq!(
            at_equivs,
            vec![(KeyCode::Char(' '), ctrl)],
            "Ctrl+@ should map back to Ctrl+Space"
        );

        // === Ctrl+- <-> Ctrl+_ ===
        // Ctrl+- and Ctrl+_ both send 0x1F in some terminals
        let minus_equivs = terminal_key_equivalents(KeyCode::Char('-'), ctrl);
        assert_eq!(
            minus_equivs,
            vec![(KeyCode::Char('_'), ctrl)],
            "Ctrl+- should map to Ctrl+_"
        );
        let underscore_equivs = terminal_key_equivalents(KeyCode::Char('_'), ctrl);
        assert_eq!(
            underscore_equivs,
            vec![(KeyCode::Char('-'), ctrl)],
            "Ctrl+_ should map back to Ctrl+-"
        );

        // === No equivalents for regular keys ===
        assert!(
            terminal_key_equivalents(KeyCode::Char('a'), ctrl).is_empty(),
            "Ctrl+A should have no terminal equivalents"
        );
        assert!(
            terminal_key_equivalents(KeyCode::Char('z'), ctrl).is_empty(),
            "Ctrl+Z should have no terminal equivalents"
        );
        assert!(
            terminal_key_equivalents(KeyCode::Enter, ctrl).is_empty(),
            "Ctrl+Enter should have no terminal equivalents"
        );

        // === No equivalents without Ctrl modifier ===
        assert!(
            terminal_key_equivalents(KeyCode::Char('/'), KeyModifiers::empty()).is_empty(),
            "/ without Ctrl should have no equivalents"
        );
        assert!(
            terminal_key_equivalents(KeyCode::Char('7'), KeyModifiers::SHIFT).is_empty(),
            "Shift+7 should have no equivalents"
        );
        assert!(
            terminal_key_equivalents(KeyCode::Char('h'), KeyModifiers::ALT).is_empty(),
            "Alt+H should have no equivalents"
        );

        // === Ctrl+H only maps to Backspace when ONLY Ctrl is pressed ===
        // Ctrl+Shift+H or Ctrl+Alt+H should NOT map to Backspace
        let ctrl_shift = KeyModifiers::CONTROL | KeyModifiers::SHIFT;
        let ctrl_shift_h_equivs = terminal_key_equivalents(KeyCode::Char('h'), ctrl_shift);
        assert!(
            ctrl_shift_h_equivs.is_empty(),
            "Ctrl+Shift+H should NOT map to Ctrl+Shift+Backspace"
        );
    }

    #[test]
    fn test_no_duplicate_keybindings_in_keymaps() {
        // Load all keymaps and check for duplicate bindings within the same context
        // A duplicate is when the same key+modifiers+context is defined more than once
        use std::collections::HashMap;

        let keymaps: &[(&str, &str)] = &[
            ("default", include_str!("../../keymaps/default.json")),
            ("macos", include_str!("../../keymaps/macos.json")),
        ];

        for (keymap_name, json_content) in keymaps {
            let keymap: crate::config::KeymapConfig = serde_json::from_str(json_content)
                .unwrap_or_else(|e| panic!("Failed to parse keymap '{}': {}", keymap_name, e));

            // Track seen bindings per context: (key, modifiers, context) -> action
            let mut seen: HashMap<(String, Vec<String>, String), String> = HashMap::new();
            let mut duplicates: Vec<String> = Vec::new();

            for binding in &keymap.bindings {
                let when = binding.when.clone().unwrap_or_default();
                let key_id = (binding.key.clone(), binding.modifiers.clone(), when.clone());

                if let Some(existing_action) = seen.get(&key_id) {
                    duplicates.push(format!(
                        "Duplicate in '{}': key='{}', modifiers={:?}, when='{}' -> '{}' vs '{}'",
                        keymap_name,
                        binding.key,
                        binding.modifiers,
                        when,
                        existing_action,
                        binding.action
                    ));
                } else {
                    seen.insert(key_id, binding.action.clone());
                }
            }

            assert!(
                duplicates.is_empty(),
                "Found duplicate keybindings:\n{}",
                duplicates.join("\n")
            );
        }
    }
}