cascade_cli/cli/commands/

entry.rs

use crate::cli::output::Output;
use crate::errors::{CascadeError, Result};
use crate::git::find_repository_root;
use crate::stack::StackManager;
use clap::Subcommand;
use crossterm::{
    event::{self, DisableMouseCapture, EnableMouseCapture, Event, KeyCode, KeyEventKind},
    execute,
    terminal::{disable_raw_mode, enable_raw_mode, EnterAlternateScreen, LeaveAlternateScreen},
};
use dialoguer::{theme::ColorfulTheme, Confirm};
use ratatui::{
    backend::CrosstermBackend,
    layout::{Alignment, Constraint, Direction, Layout},
    style::{Color, Modifier, Style},
    text::{Line, Span},
    widgets::{Block, Borders, List, ListItem, ListState, Paragraph},
    Terminal,
};
use std::env;
use std::io;
use tracing::{info, warn};

#[derive(Debug, Subcommand)]
pub enum EntryAction {
    /// Interactively checkout a stack entry for editing
    Checkout {
        /// Stack entry number (optional, shows picker if not provided)
        entry: Option<usize>,
        /// Skip interactive picker and use entry number directly
        #[arg(long)]
        direct: bool,
        /// Skip confirmation prompts
        #[arg(long, short)]
        yes: bool,
    },
    /// Show current edit mode status
    Status {
        /// Show brief status only
        #[arg(long)]
        quiet: bool,
    },
    /// List all entries with their edit status
    List {
        /// Show detailed information
        #[arg(long, short)]
        verbose: bool,
    },
}

pub async fn run(action: EntryAction) -> Result<()> {
    let _current_dir = env::current_dir()
        .map_err(|e| CascadeError::config(format!("Could not get current directory: {e}")))?;

    match action {
        EntryAction::Checkout { entry, direct, yes } => checkout_entry(entry, direct, yes).await,
        EntryAction::Status { quiet } => show_edit_status(quiet).await,
        EntryAction::List { verbose } => list_entries(verbose).await,
    }
}

/// Checkout a specific stack entry for editing
async fn checkout_entry(
    entry_num: Option<usize>,
    direct: bool,
    skip_confirmation: bool,
) -> Result<()> {
    let current_dir = env::current_dir()
        .map_err(|e| CascadeError::config(format!("Could not get current directory: {e}")))?;

    let repo_root = find_repository_root(&current_dir)
        .map_err(|e| CascadeError::config(format!("Could not find git repository: {e}")))?;

    let mut manager = StackManager::new(&repo_root)?;

    // Get active stack
    let active_stack = manager.get_active_stack().ok_or_else(|| {
        CascadeError::config("No active stack. Create a stack first with 'ca stack create'")
    })?;

    if active_stack.entries.is_empty() {
        return Err(CascadeError::config(
            "Stack is empty. Push some commits first with 'ca stack push'",
        ));
    }

    // Determine which entry to checkout
    let target_entry_num = if let Some(num) = entry_num {
        if num == 0 || num > active_stack.entries.len() {
            return Err(CascadeError::config(format!(
                "Invalid entry number: {}. Stack has {} entries",
                num,
                active_stack.entries.len()
            )));
        }
        num
    } else if direct {
        return Err(CascadeError::config(
            "Entry number required when using --direct flag",
        ));
    } else {
        // Show interactive picker
        show_entry_picker(active_stack).await?
    };

    let target_entry = &active_stack.entries[target_entry_num - 1]; // Convert to 0-based index

    // Clone the values we need before borrowing manager mutably
    let stack_id = active_stack.id;
    let entry_id = target_entry.id;
    let entry_commit_hash = target_entry.commit_hash.clone();
    let entry_branch = target_entry.branch.clone();
    let entry_short_hash = target_entry.short_hash();
    let entry_short_message = target_entry.short_message(50);
    let entry_pr_id = target_entry.pull_request_id.clone();

    // Check if already in edit mode
    if manager.is_in_edit_mode() {
        let edit_info = manager.get_edit_mode_info().unwrap();
        warn!("Already in edit mode for entry in stack");

        if !skip_confirmation {
            Output::warning("Already in edit mode!");

            // Try to get the commit message for the current edit target
            let commit_message = if let Some(target_entry_id) = edit_info.target_entry_id {
                if let Some(entry) = active_stack
                    .entries
                    .iter()
                    .find(|e| e.id == target_entry_id)
                {
                    entry.short_message(50)
                } else {
                    "Unknown entry".to_string()
                }
            } else {
                "Unknown target".to_string()
            };

            Output::sub_item(format!(
                "Current target: {} ({})",
                &edit_info.original_commit_hash[..8],
                commit_message
            ));

            // Interactive confirmation to exit current edit mode
            let should_exit_edit_mode = Confirm::with_theme(&ColorfulTheme::default())
                .with_prompt("Exit current edit mode and start a new one?")
                .default(false)
                .interact()
                .map_err(|e| {
                    CascadeError::config(format!("Failed to get user confirmation: {e}"))
                })?;

            if !should_exit_edit_mode {
                return Err(CascadeError::config(
                    "Operation cancelled. Use 'ca entry status' to see current edit mode details.",
                ));
            }

            // TODO: Implement proper exit from edit mode
            // For now, just warn that this isn't implemented yet
            return Err(CascadeError::config("Exiting edit mode not yet implemented. Use 'ca entry status' and handle any pending changes manually."));
        }
    }

    // Confirmation prompt
    if !skip_confirmation {
        Output::section("Checking out entry for editing");
        Output::sub_item(format!(
            "Entry #{target_entry_num}: {entry_short_hash} ({entry_short_message})"
        ));
        Output::sub_item(format!("Branch: {entry_branch}"));
        if let Some(pr_id) = &entry_pr_id {
            Output::sub_item(format!("PR: #{pr_id}"));
        }

        // Display full commit message
        Output::sub_item("Commit Message:");
        let lines: Vec<&str> = target_entry.message.lines().collect();
        for line in lines {
            Output::sub_item(format!("  {line}"));
        }

        Output::warning("This will checkout the commit and enter edit mode.");
        Output::info("Any changes you make can be amended to this commit or create new entries.");

        // Interactive confirmation to proceed with checkout
        let should_continue = Confirm::with_theme(&ColorfulTheme::default())
            .with_prompt("Continue with checkout?")
            .default(false)
            .interact()
            .map_err(|e| CascadeError::config(format!("Failed to get user confirmation: {e}")))?;

        if !should_continue {
            return Err(CascadeError::config("Entry checkout cancelled"));
        }
    }

    // Enter edit mode
    manager.enter_edit_mode(stack_id, entry_id)?;

    // Checkout the commit
    let current_dir = env::current_dir()
        .map_err(|e| CascadeError::config(format!("Could not get current directory: {e}")))?;

    let repo_root = find_repository_root(&current_dir)
        .map_err(|e| CascadeError::config(format!("Could not find git repository: {e}")))?;
    let repo = crate::git::GitRepository::open(&repo_root)?;

    info!("Checking out commit: {}", entry_commit_hash);
    repo.checkout_commit(&entry_commit_hash)?;

    Output::success(format!("Entered edit mode for entry #{target_entry_num}"));
    Output::sub_item(format!(
        "You are now on commit: {entry_short_hash} ({entry_short_message})"
    ));
    Output::sub_item(format!("Branch: {entry_branch}"));

    Output::section("Make your changes and commit normally");
    Output::bullet("Use 'ca entry status' to see edit mode info");
    Output::bullet("Use 'git commit --amend' to modify this entry");
    Output::bullet("Use 'git commit' to create a new entry on top");
    Output::bullet("Run 'ca sync' after committing to update PRs");

    // Check if prepare-commit-msg hook is installed
    let hooks_dir = repo_root.join(".git/hooks");
    let hook_path = hooks_dir.join("prepare-commit-msg");
    if !hook_path.exists() {
        Output::tip("Install the prepare-commit-msg hook for better guidance:");
        Output::sub_item("ca hooks add prepare-commit-msg");
    }

    Ok(())
}

/// Interactive entry picker using TUI
async fn show_entry_picker(stack: &crate::stack::Stack) -> Result<usize> {
    // Setup terminal
    enable_raw_mode()?;
    let mut stdout = io::stdout();
    execute!(stdout, EnterAlternateScreen, EnableMouseCapture)?;
    let backend = CrosstermBackend::new(stdout);
    let mut terminal = Terminal::new(backend)?;

    let mut list_state = ListState::default();
    list_state.select(Some(0));

    let result = loop {
        terminal.draw(|f| {
            let size = f.area();

            // Create layout
            let chunks = Layout::default()
                .direction(Direction::Vertical)
                .margin(2)
                .constraints(
                    [
                        Constraint::Length(3), // Title
                        Constraint::Min(5),    // List
                        Constraint::Length(3), // Help
                    ]
                    .as_ref(),
                )
                .split(size);

            // Title
            let title = Paragraph::new(format!("📚 Select Entry from Stack: {}", stack.name))
                .style(
                    Style::default()
                        .fg(Color::Cyan)
                        .add_modifier(Modifier::BOLD),
                )
                .alignment(Alignment::Center)
                .block(Block::default().borders(Borders::ALL));
            f.render_widget(title, chunks[0]);

            // Entry list
            let items: Vec<ListItem> = stack
                .entries
                .iter()
                .enumerate()
                .map(|(i, entry)| {
                    let status_icon = if entry.is_submitted {
                        if entry.pull_request_id.is_some() {
                            "📤"
                        } else {
                            "📝"
                        }
                    } else {
                        "🔄"
                    };

                    let pr_text = if let Some(pr_id) = &entry.pull_request_id {
                        format!(" PR: #{pr_id}")
                    } else {
                        "".to_string()
                    };

                    let line = Line::from(vec![
                        Span::raw(format!("  {}. ", i + 1)),
                        Span::raw(status_icon),
                        Span::raw(" "),
                        Span::styled(entry.short_message(40), Style::default().fg(Color::White)),
                        Span::raw(" "),
                        Span::styled(
                            format!("({})", entry.short_hash()),
                            Style::default().fg(Color::Yellow),
                        ),
                        Span::styled(pr_text, Style::default().fg(Color::Green)),
                    ]);

                    ListItem::new(line)
                })
                .collect();

            let list = List::new(items)
                .block(Block::default().borders(Borders::ALL).title("Entries"))
                .highlight_style(Style::default().fg(Color::Black).bg(Color::Cyan))
                .highlight_symbol("→ ");

            f.render_stateful_widget(list, chunks[1], &mut list_state);

            // Help text
            let help = Paragraph::new("↑/↓: Navigate • Enter: Select • q: Quit • r: Refresh")
                .style(Style::default().fg(Color::DarkGray))
                .alignment(Alignment::Center)
                .block(Block::default().borders(Borders::ALL));
            f.render_widget(help, chunks[2]);
        })?;

        // Handle input
        if let Event::Key(key) = event::read()? {
            if key.kind == KeyEventKind::Press {
                match key.code {
                    KeyCode::Char('q') => {
                        break Err(CascadeError::config("Entry selection cancelled"));
                    }
                    KeyCode::Up => {
                        let selected = list_state.selected().unwrap_or(0);
                        if selected > 0 {
                            list_state.select(Some(selected - 1));
                        } else {
                            list_state.select(Some(stack.entries.len() - 1));
                        }
                    }
                    KeyCode::Down => {
                        let selected = list_state.selected().unwrap_or(0);
                        if selected < stack.entries.len() - 1 {
                            list_state.select(Some(selected + 1));
                        } else {
                            list_state.select(Some(0));
                        }
                    }
                    KeyCode::Enter => {
                        let selected = list_state.selected().unwrap_or(0);
                        break Ok(selected + 1); // Convert to 1-based index
                    }
                    KeyCode::Char('r') => {
                        // Refresh - for now just continue the loop
                        continue;
                    }
                    _ => {}
                }
            }
        }
    };

    // Restore terminal
    disable_raw_mode()?;
    execute!(
        terminal.backend_mut(),
        LeaveAlternateScreen,
        DisableMouseCapture
    )?;
    terminal.show_cursor()?;

    result
}

/// Show current edit mode status
async fn show_edit_status(quiet: bool) -> Result<()> {
    let current_dir = env::current_dir()
        .map_err(|e| CascadeError::config(format!("Could not get current directory: {e}")))?;

    let repo_root = find_repository_root(&current_dir)
        .map_err(|e| CascadeError::config(format!("Could not find git repository: {e}")))?;
    let manager = StackManager::new(&repo_root)?;

    if !manager.is_in_edit_mode() {
        if quiet {
            println!("inactive");
        } else {
            Output::info("Not in edit mode");
            Output::sub_item("Use 'ca entry checkout' to start editing a stack entry");
        }
        return Ok(());
    }

    let edit_info = manager.get_edit_mode_info().unwrap();

    if quiet {
        println!("active:{:?}", edit_info.target_entry_id);
        return Ok(());
    }

    Output::section("Currently in edit mode");

    // Try to get the entry information
    if let Some(active_stack) = manager.get_active_stack() {
        if let Some(target_entry_id) = edit_info.target_entry_id {
            if let Some(entry) = active_stack
                .entries
                .iter()
                .find(|e| e.id == target_entry_id)
            {
                Output::sub_item(format!(
                    "Target entry: {} ({})",
                    entry.short_hash(),
                    entry.short_message(50)
                ));
                Output::sub_item(format!("Branch: {}", entry.branch));

                // Display full commit message
                Output::sub_item("Commit Message:");
                let lines: Vec<&str> = entry.message.lines().collect();
                for line in lines {
                    Output::sub_item(format!("  {line}"));
                }
            } else {
                Output::sub_item(format!("Target entry: {target_entry_id:?} (not found)"));
            }
        } else {
            Output::sub_item("Target entry: Unknown");
        }
    } else {
        Output::sub_item(format!("Target entry: {:?}", edit_info.target_entry_id));
    }

    Output::sub_item(format!(
        "Original commit: {}",
        &edit_info.original_commit_hash[..8]
    ));
    Output::sub_item(format!(
        "Started: {}",
        edit_info.started_at.format("%Y-%m-%d %H:%M:%S")
    ));

    // Show current Git status
    Output::section("Current state");

    // Get current repository state
    let current_dir = env::current_dir()
        .map_err(|e| CascadeError::config(format!("Could not get current directory: {e}")))?;
    let repo_root = find_repository_root(&current_dir)
        .map_err(|e| CascadeError::config(format!("Could not find git repository: {e}")))?;
    let repo = crate::git::GitRepository::open(&repo_root)?;

    // Current HEAD vs original commit
    let current_head = repo.get_current_commit_hash()?;
    if current_head != edit_info.original_commit_hash {
        let current_short = &current_head[..8];
        let original_short = &edit_info.original_commit_hash[..8];
        Output::sub_item(format!("HEAD moved: {original_short} → {current_short}"));

        // Show if there are new commits
        match repo.get_commit_count_between(&edit_info.original_commit_hash, &current_head) {
            Ok(count) if count > 0 => {
                Output::sub_item(format!("  {count} new commit(s) created"));
            }
            _ => {}
        }
    } else {
        Output::sub_item(format!("HEAD: {} (unchanged)", &current_head[..8]));
    }

    // Working directory and staging status
    match repo.get_status_summary() {
        Ok(status) => {
            if status.is_clean() {
                Output::sub_item("Working directory: clean");
            } else {
                if status.has_staged_changes() {
                    Output::sub_item(format!("Staged changes: {} files", status.staged_count()));
                }
                if status.has_unstaged_changes() {
                    Output::sub_item(format!(
                        "Unstaged changes: {} files",
                        status.unstaged_count()
                    ));
                }
                if status.has_untracked_files() {
                    Output::sub_item(format!(
                        "Untracked files: {} files",
                        status.untracked_count()
                    ));
                }
            }
        }
        Err(_) => {
            Output::sub_item("Working directory: status unavailable");
        }
    }

    Output::tip("Use 'git status' for detailed file-level status");
    Output::sub_item("Use 'ca entry list' to see all entries");

    Ok(())
}

/// List all entries in the stack with edit status
async fn list_entries(verbose: bool) -> Result<()> {
    let current_dir = env::current_dir()
        .map_err(|e| CascadeError::config(format!("Could not get current directory: {e}")))?;

    let repo_root = find_repository_root(&current_dir)
        .map_err(|e| CascadeError::config(format!("Could not find git repository: {e}")))?;
    let manager = StackManager::new(&repo_root)?;

    let active_stack = manager.get_active_stack().ok_or_else(|| {
        CascadeError::config(
            "No active stack. Create a stack first with 'ca stack create'".to_string(),
        )
    })?;

    if active_stack.entries.is_empty() {
        Output::info(format!(
            "Active stack '{}' has no entries yet",
            active_stack.name
        ));
        Output::sub_item("Add some commits to the stack with 'ca stack push'");
        return Ok(());
    }

    Output::section(format!(
        "Stack: {} ({} entries)",
        active_stack.name,
        active_stack.entries.len()
    ));

    let edit_mode_info = manager.get_edit_mode_info();

    for (i, entry) in active_stack.entries.iter().enumerate() {
        let entry_num = i + 1;

        // Status icon
        let status_icon = if entry.is_submitted {
            if entry.pull_request_id.is_some() {
                "📤"
            } else {
                "📝"
            }
        } else {
            "🔄"
        };

        // Edit mode indicator
        let edit_indicator = if edit_mode_info.is_some()
            && edit_mode_info.unwrap().target_entry_id == Some(entry.id)
        {
            " 🎯"
        } else {
            ""
        };

        // Basic entry line
        print!(
            "   {}. {} {} ({})",
            entry_num,
            status_icon,
            entry.short_message(50),
            entry.short_hash()
        );

        // PR information
        if let Some(pr_id) = &entry.pull_request_id {
            print!(" PR: #{pr_id}");
        }

        print!("{edit_indicator}");
        println!(); // Line break for entry

        // Verbose information
        if verbose {
            Output::sub_item(format!("Branch: {}", entry.branch));
            Output::sub_item(format!("Commit: {}", entry.commit_hash));
            Output::sub_item(format!(
                "Created: {}",
                entry.created_at.format("%Y-%m-%d %H:%M:%S")
            ));
            if entry.is_submitted {
                Output::sub_item("Status: Submitted");
            } else {
                Output::sub_item("Status: Draft");
            }

            // Display full commit message
            Output::sub_item("Message:");
            let lines: Vec<&str> = entry.message.lines().collect();
            for line in lines {
                Output::sub_item(format!("  {line}"));
            }

            // Add Git status info for entry in edit mode
            if edit_mode_info.is_some() && edit_mode_info.unwrap().target_entry_id == Some(entry.id)
            {
                if let Ok(repo_root) = find_repository_root(&env::current_dir().unwrap_or_default())
                {
                    if let Ok(repo) = crate::git::GitRepository::open(&repo_root) {
                        match repo.get_status_summary() {
                            Ok(status) => {
                                if !status.is_clean() {
                                    Output::sub_item("Git Status:");
                                    if status.has_staged_changes() {
                                        Output::sub_item(format!(
                                            "  Staged: {} files",
                                            status.staged_count()
                                        ));
                                    }
                                    if status.has_unstaged_changes() {
                                        Output::sub_item(format!(
                                            "  Unstaged: {} files",
                                            status.unstaged_count()
                                        ));
                                    }
                                    if status.has_untracked_files() {
                                        Output::sub_item(format!(
                                            "  Untracked: {} files",
                                            status.untracked_count()
                                        ));
                                    }
                                } else {
                                    Output::sub_item("Git Status: clean");
                                }
                            }
                            Err(_) => {
                                Output::sub_item("Git Status: unavailable");
                            }
                        }
                    }
                }
            }
            // Add spacing between entries
        }
    }

    if let Some(_edit_info) = edit_mode_info {
        Output::spacing();
        Output::info("Edit mode active - use 'ca entry status' for details");
    } else {
        Output::spacing();
        Output::tip("Use 'ca entry checkout' to start editing an entry");
    }

    Ok(())
}