mahbot 0.4.1

//! Role metadata consolidation — single source of truth for all static [`Role`] properties.
//!
//! This module is the canonical home for [`Role`]'s static methods, trait impls,
//! and metadata lookups — including role descriptions, discovery prompts,
//! tool assignments, and [`RoleInfo`]. Used by [`crate::agent`] and other modules
//! that need role data.

use std::sync::LazyLock;

use strum::IntoEnumIterator;

use crate::Role;

/// Role string for diagnostics comments — used both when posting diagnostics
/// comments and in the circuit breaker filter. Must stay in sync between
/// both sites to prevent silent miscounting on re-dispatch.
pub(crate) const DIAGNOSTICS_ROLE: &str = "diagnostics";

/// Role string for system comments — used when posting system comments on
/// tickets (notifications, circuit breaker trip comments, agent summaries)
/// and when filtering comments in circuit breaker [`CircuitBreakerKind::should_trip`]
/// implementations. Must stay in sync between all sites to prevent silent miscounting.
pub(crate) const SYSTEM_ROLE: &str = "system";

/// Role string for sanitation comments — used both when posting sanitation
/// failure marker comments and in the circuit breaker filter. Must stay in
/// sync between both sites to prevent silent miscounting on re-dispatch.
pub(crate) const SANITATION_ROLE: &str = "sanitation_admin";

// ── RoleInfo ──────────────────────────────────────────────────────────────

/// All static metadata for a [`Role`] variant.
///
/// Every accessor goes through a single match in [`role_info()`], replacing
/// the match statements that were previously scattered across the codebase
/// for role metadata lookups. Icon widgets live in `theme::role_icon()`.
///
/// Adding a new role requires updating the [`Role`] enum in `lib.rs`,
/// creating prompt files at `src/prompt/role/{name}.md` and
/// `src/prompt/summarize/{name}.md` (and optionally
/// `src/prompt/discovery/{name}.md` if `has_discovery` is true),
/// adding an arm in this match, the [`Role::tools()`] method,
/// and the `theme::role_icon()` match.
/// The compiler will catch missing arms in exhaustive matches, but it
/// cannot catch an arm that returns an empty tool set or silently uses
/// struct update defaults — the tests in this module guard against those:
///
/// * `badge_fg` black sentinel (struct update syntax)
/// * `display_label` empty string sentinel (struct update syntax)
/// * `default_reasoning_effort` non-empty (struct update)
/// * [`Role::tools()`] non-empty for every variant
/// * `role_description()` contains real content (no placeholder)
/// * `summary_prompt()` contains real content (no placeholder)
/// * `discovery_prompt()` contains real content (no placeholder, for roles where `has_discovery` is true)
pub struct RoleInfo {
    /// Whether this role has a discovery prompt for workspace exploration.
    pub has_discovery: bool,
    /// Whether this role requires a vision-capable (multimodal) model.
    ///
    /// Controls two downstream behaviors:
    /// 1. **Message enrichment** (in `main.rs`): local image files are uploaded as
    ///    data URIs instead of being transcribed to text.
    /// 2. **Provider payload format** (in `agent.rs`): user-provided image markers
    ///    are embedded as `image_url` parts in the chat request.
    ///
    /// Only [`Role::Artist`] currently sets this to `true`.
    /// Note: image/video *generation* tools ([`ImageGenTool`], [`VideoGenTool`])
    /// use their own generation model configuration and do **not** depend on this flag.
    pub requires_multimodal: bool,
    /// Badge foreground color as an RGB tuple.
    ///
    /// Converted to an [`iced::Color`] badge in `gui/theme.rs`. The badge
    /// background is always this color at 0.1 alpha.
    pub badge_fg: (f32, f32, f32),
    /// Default reasoning effort for this role.
    ///
    /// Authoritative since mahbot-1819: reasoning effort is no longer
    /// user-tunable and stored `config_role.reasoning_effort` values are never
    /// consulted, so this baked default is what request time always uses.
    pub default_reasoning_effort: &'static str,
    /// Human-readable display label (e.g. `"QA"` for [`Role::Qa`]).
    pub display_label: &'static str,
}

// ── Single source of truth ────────────────────────────────────────────────

/// Default values shared by most [`Role`] variants in [`role_info()`].
///
/// Used via struct update syntax (`..BASE_ROLE_INFO`) to keep each arm
/// concise and make future field additions cheap.
const BASE_ROLE_INFO: RoleInfo = RoleInfo {
    has_discovery: true,
    requires_multimodal: false,
    badge_fg: (0.0, 0.0, 0.0),
    default_reasoning_effort: "high",
    display_label: "",
};

/// Look up static metadata for a role.
///
/// # Panics
/// Never — this is a complete match over all [`Role`] variants.
#[must_use]
#[allow(clippy::trivially_copy_pass_by_ref)]
pub const fn role_info(role: &Role) -> &'static RoleInfo {
    match role {
        Role::Manager => &RoleInfo {
            badge_fg: (0.816, 0.635, 0.082),
            default_reasoning_effort: "xhigh",
            display_label: "Manager",
            ..BASE_ROLE_INFO
        },
        Role::Engineer => &RoleInfo {
            badge_fg: (0.855, 0.439, 0.173),
            display_label: "Engineer",
            ..BASE_ROLE_INFO
        },
        Role::Analyst => &RoleInfo {
            badge_fg: (0.263, 0.522, 0.745),
            display_label: "Analyst",
            ..BASE_ROLE_INFO
        },
        Role::Coder => &RoleInfo {
            badge_fg: (0.353, 0.604, 0.416),
            display_label: "Coder",
            ..BASE_ROLE_INFO
        },
        Role::Qa => &RoleInfo {
            badge_fg: (0.545, 0.494, 0.784),
            display_label: "QA",
            ..BASE_ROLE_INFO
        },
        Role::Reviewer => &RoleInfo {
            badge_fg: (0.431, 0.494, 0.784),
            display_label: "Reviewer",
            ..BASE_ROLE_INFO
        },
        Role::Discovery => &RoleInfo {
            has_discovery: false,
            default_reasoning_effort: "xhigh",
            badge_fg: (0.227, 0.663, 0.624),
            display_label: "Discovery",
            ..BASE_ROLE_INFO
        },
        Role::Artist => &RoleInfo {
            has_discovery: false,
            requires_multimodal: true,
            badge_fg: (0.808, 0.365, 0.592),
            default_reasoning_effort: "high",
            display_label: "Artist",
        },
        Role::Maintainer => &RoleInfo {
            badge_fg: (0.753, 0.376, 0.502),
            default_reasoning_effort: "xhigh",
            display_label: "Maintainer",
            ..BASE_ROLE_INFO
        },
        Role::Sanitation => &RoleInfo {
            badge_fg: (0.482, 0.482, 0.482),
            display_label: "Sanitation",
            ..BASE_ROLE_INFO
        },
        Role::Assistant => &RoleInfo {
            has_discovery: false,
            badge_fg: (0.153, 0.820, 0.757),
            default_reasoning_effort: "xhigh",
            display_label: "Assistant",
            ..BASE_ROLE_INFO
        },
    }
}

// ── Trait impls ─────────────────────────────────────────────────────────

/// Valid role names, pre-computed once to avoid re-iteration in error paths.
static ALL_ROLE_NAMES: LazyLock<String> = LazyLock::new(|| {
    Role::iter()
        .map(|r| r.as_str())
        .collect::<Vec<_>>()
        .join(", ")
});

impl std::str::FromStr for Role {
    type Err = anyhow::Error;

    fn from_str(s: &str) -> Result<Self, Self::Err> {
        let lower = s.to_ascii_lowercase();
        Role::iter().find(|r| r.as_str() == lower).ok_or_else(|| {
            anyhow::anyhow!("Unknown role '{s}', expected one of: {}", *ALL_ROLE_NAMES)
        })
    }
}

// ── Role metadata methods ──────────────────────────────────────────────

impl Role {
    /// Canonical role name as a `&'static str` (lowercase).
    ///
    /// Delegates to the [`strum::IntoStaticStr`] derive, which produces
    /// string literals with a `'static` lifetime. This is the canonical
    /// method for obtaining the role's string representation.
    #[must_use]
    pub fn as_str(&self) -> &'static str {
        self.into()
    }

    /// Whether this role requires a vision-capable (multimodal) model.
    #[must_use]
    pub const fn requires_multimodal(&self) -> bool {
        role_info(self).requires_multimodal
    }

    /// Human-readable display label (e.g. `"QA"` for [`Role::Qa`]).
    #[must_use]
    pub const fn display_label(&self) -> &'static str {
        role_info(self).display_label
    }

    /// Role description loaded from embedded prompt files.
    #[must_use]
    pub fn role_description(&self) -> String {
        crate::prompt::load_prompt(&format!("role/{}.md", self.as_str()))
    }

    /// Discovery prompt for this role, loaded from embedded prompt files.
    ///
    /// # Panics
    /// Panics if the role does not have a discovery prompt (see
    /// [`RoleInfo::has_discovery`]) — callers must check `has_discovery`
    /// before calling this method or use a role that is known to have one.
    #[must_use]
    pub fn discovery_prompt(&self) -> String {
        let info = role_info(self);
        if info.has_discovery {
            crate::prompt::load_prompt(&format!("discovery/{}.md", self.as_str()))
        } else {
            panic!("Discovery prompt for role '{self}' does not exist")
        }
    }

    /// Conversation compaction prompt for this role, loaded from
    /// `src/prompt/summarize/{role}.md`.
    #[must_use]
    pub fn summary_prompt(&self) -> String {
        crate::prompt::load_prompt(&format!("summarize/{}.md", self.as_str()))
    }
}

// ── Tool set factory ──────────────────────────────────────────────────────

use crate::Tool;
use crate::Workspace;
use crate::config::CONFIG;
use crate::tools::{
    AddCommentTool, AnalyzeTool, BrowserTool, CreateTicketTool, DispatchMode, EditTool,
    GetTicketTool, ImageGenTool, ImplementTool, ListTicketsTool, ReadTool, ResearchTool,
    SearchArchivedTicketsTool, SearchTool, ShellMode, ShellTool, UpdateTicketTool, VideoEditTool,
    VideoGenTool, WebSearchBackend, WebSearchTool,
};

impl Role {
    /// Core read/search/read-only-shell tools for inspector-style roles
    /// (Analyst, QA, Reviewer, Discovery, Maintainer).
    fn readonly_core_tools() -> Vec<Box<dyn Tool>> {
        vec![
            Box::new(ReadTool),
            Box::new(SearchTool),
            Box::new(ShellTool::new(ShellMode::ReadOnly)),
        ]
    }

    /// Core full-shell/read/edit/search tools for full-access roles
    /// (Engineer, Coder).
    fn full_core_tools() -> Vec<Box<dyn Tool>> {
        vec![
            Box::new(ShellTool::new(ShellMode::Full)),
            Box::new(ReadTool),
            Box::new(EditTool),
            Box::new(SearchTool),
        ]
    }

    /// Build the tool set for this role.
    ///
    /// Ticket tools are bound to `ws` at construction time — all their
    /// operations are confined to that workspace.
    #[must_use]
    pub(crate) fn tools(self, ws: &Workspace) -> Vec<Box<dyn Tool>> {
        let mut tools: Vec<Box<dyn Tool>> = match self {
            Role::Engineer => {
                let mut t = Self::full_core_tools();
                t.push(Box::new(AnalyzeTool::new(
                    DispatchMode::Sync,
                    Role::Engineer,
                )));
                t.push(Box::new(ImplementTool));
                t
            }
            Role::Manager => {
                vec![
                    Box::new(CreateTicketTool::new("manager", ws)),
                    Box::new(UpdateTicketTool::new(ws)),
                    Box::new(ListTicketsTool::new(ws)),
                    Box::new(GetTicketTool::new(ws)),
                    Box::new(AddCommentTool::new(ws)),
                    Box::new(SearchArchivedTicketsTool::new(ws)),
                    Box::new(AnalyzeTool::new(DispatchMode::Async, Role::Manager)),
                    Box::new(ResearchTool::new(Role::Manager)),
                ]
            }
            Role::Analyst => {
                let mut t = Self::readonly_core_tools();
                t.push(Box::new(BrowserTool::default()));
                t
            }
            Role::Coder => Self::full_core_tools(),
            Role::Qa | Role::Reviewer | Role::Discovery => Self::readonly_core_tools(),
            Role::Sanitation => {
                // Sanitation deliberately has NO search tools (local `search`
                // or `web_search`): the role inspects and cleans specific
                // filesystem artifacts and never needs to index the temp tree
                // or hit the web — for the periodic temp-dir cleaner a
                // `search` over the whole temp folder would index junk and
                // start filesystem watchers. Read + read-only shell cover
                // inspection and temp-root mutation (mahbot-1779).
                vec![
                    Box::new(ReadTool),
                    Box::new(ShellTool::new(ShellMode::ReadOnly)),
                ]
            }
            Role::Artist => {
                vec![
                    Box::new(SearchTool),
                    Box::new(ImageGenTool),
                    Box::new(VideoGenTool),
                    Box::new(VideoEditTool),
                ]
            }
            Role::Maintainer => {
                let mut t = Self::readonly_core_tools();
                t.push(Box::new(AnalyzeTool::new(
                    DispatchMode::Sync,
                    Role::Maintainer,
                )));
                t.push(Box::new(CreateTicketTool::new("maintainer", ws)));
                t
            }
            Role::Assistant => {
                vec![Box::new(AnalyzeTool::new(
                    DispatchMode::Async,
                    Role::Assistant,
                ))]
            }
        };

        if !matches!(self, Role::Manager | Role::Sanitation) {
            Self::add_web_search_tool(&mut tools);
        }

        tools
    }

    /// Appends a web search tool based on the current configuration.
    ///
    /// At most one web search tool is registered — if an explicit provider
    /// is configured but its API key is missing, no tool is added.
    /// Auto-selection: Firecrawl wins ties (both keys set, no preference).
    /// The caller is responsible for skipping this for Manager (who is
    /// expected to delegate web searches to analysts via [`AnalyzeTool`])
    /// and Sanitation (whose toolset is deliberately search-free — see
    /// [`Role::tools`]).
    fn add_web_search_tool(tools: &mut Vec<Box<dyn Tool>>) {
        let provider = CONFIG.web_search_provider();
        let firecrawl_key = CONFIG.firecrawl_key();
        let exa_key = CONFIG.exa_key();

        let backend: Option<WebSearchBackend> = match provider.as_deref() {
            Some(p) if p.eq_ignore_ascii_case("firecrawl") => {
                firecrawl_key.map(|key| WebSearchBackend::Firecrawl { key })
            }
            Some(p) if p.eq_ignore_ascii_case("exa") => {
                exa_key.map(|key| WebSearchBackend::Exa { key })
            }
            Some(other) => {
                tracing::warn!("Unknown web_search_provider: {other}");
                None
            }
            None => firecrawl_key
                .map(|key| WebSearchBackend::Firecrawl { key })
                .or_else(|| exa_key.map(|key| WebSearchBackend::Exa { key })),
        };

        if let Some(backend) = backend {
            tools.push(Box::new(WebSearchTool::new(backend)));
        }
    }
}

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

    #[test]
    fn role_roundtrip() {
        // FromStr for every variant by lowercase name
        for role in Role::iter() {
            let parsed: crate::Role = role.as_str().parse().unwrap();
            assert_eq!(parsed, role, "roundtrip failed for '{}'", role.as_str());
            // Display (strum-generated) must match the canonical as_str()
            assert_eq!(role.to_string(), role.as_str());
            // as_str() returns a &'static str — verify it's non-empty
            assert!(
                !role.as_str().is_empty(),
                "as_str() empty for '{}'",
                role.as_str()
            );
        }

        // Error case
        assert!("unknown_role".parse::<crate::Role>().is_err());
    }

    #[test]
    fn requires_multimodal_only_artist() {
        // Only Artist should require multimodal; every other role should not.
        for role in Role::iter() {
            let info = super::role_info(&role);
            let expected = matches!(role, crate::Role::Artist);
            assert_eq!(
                info.requires_multimodal,
                expected,
                "{}: expected requires_multimodal={expected}, got {}",
                role.as_str(),
                info.requires_multimodal
            );
        }
    }

    #[test]
    fn badge_colors_set() {
        // Guards against the BASE_ROLE_INFO default of (0,0,0) — a new role
        // added with struct update syntax must set badge_fg explicitly.
        for role in Role::iter() {
            let info = super::role_info(&role);
            let (r, g, b) = info.badge_fg;
            let is_black = r == 0.0 && g == 0.0 && b == 0.0;
            assert!(
                !is_black,
                "{}: badge_fg must not be (0,0,0) — set a visible color",
                role.as_str()
            );
        }
    }

    #[test]
    fn defaults_set() {
        // Guards against an empty default_reasoning_effort — a new role added
        // with struct update syntax must set it if it differs from the
        // BASE_ROLE_INFO default, and even the base must be non-empty.
        for role in Role::iter() {
            let info = super::role_info(&role);
            assert!(
                !info.default_reasoning_effort.is_empty(),
                "{}: default_reasoning_effort must not be empty",
                role.as_str()
            );
        }
    }

    #[test]
    fn display_labels_set() {
        // Guards against the BASE_ROLE_INFO sentinel of "" — every role must
        // set a display_label explicitly.
        for role in Role::iter() {
            let info = super::role_info(&role);
            assert!(
                !info.display_label.is_empty(),
                "{}: display_label must not be empty — set a display_label in role_info()",
                role.as_str()
            );
        }
    }

    #[test]
    fn all_roles_have_tools() {
        // Guards against an empty Vec in Role::tools() — the compiler catches
        // missing arms in the match, but cannot catch an arm that returns
        // vec![]. Every role needs at least one tool to function.
        for role in Role::iter() {
            let tools = role.tools(&crate::workspace::test_ws("test"));
            assert!(
                !tools.is_empty(),
                "{}: Role::tools() must not be empty — every role needs at least one tool",
                role.as_str()
            );
        }
    }

    #[test]
    #[serial_test::serial(config_persist)] // swaps the process-global CONFIG
    fn sanitation_toolset_is_read_and_shell_only() {
        // Acceptance pin (mahbot-1779): the Sanitation role advertises NO
        // search tools — even with web search configured — exactly read +
        // read-only shell.
        let snapshot = crate::config::CONFIG.snapshot();
        crate::config::CONFIG.swap(crate::config::ConfigData::STRUCT_FIELDS_DEFAULT);
        let _ = crate::config::CONFIG.set_string_field("web_search_provider", "exa");
        let _ = crate::config::CONFIG.set_string_field("exa_key", "test-key");
        let names: Vec<&str> = crate::Role::Sanitation
            .tools(&crate::workspace::test_ws("test"))
            .iter()
            .map(|t| t.name())
            .collect();
        crate::config::CONFIG.swap(snapshot);
        assert_eq!(
            names,
            ["read", "shell"],
            "Sanitation toolset must be exactly read + read-only shell, got: {names:?}"
        );
    }

    #[test]
    fn qa_display_label() {
        // QA has a special display label (not "Qa").
        let info = super::role_info(&crate::Role::Qa);
        assert_eq!(info.display_label, "QA");
    }

    #[test]
    fn all_roles_have_role_description() {
        // Guards against an empty or unsubstituted role description file.
        for role in Role::iter() {
            let desc = role.role_description();
            assert!(
                !desc.trim().is_empty(),
                "{}: role_description() must not be empty",
                role.as_str()
            );
            assert!(
                !crate::prompt::TEMPLATE_RE.is_match(&desc),
                "{}: role description must not contain unsubstituted template keys",
                role.as_str()
            );
        }
    }

    #[test]
    fn all_roles_have_summary_prompt() {
        // Guards against an empty or unsubstituted summary prompt file.
        for role in Role::iter() {
            let prompt = role.summary_prompt();
            assert!(
                !prompt.trim().is_empty(),
                "{}: summary_prompt() must not be empty",
                role.as_str()
            );
            assert!(
                !crate::prompt::TEMPLATE_RE.is_match(&prompt),
                "{}: summary prompt must not contain unsubstituted template keys",
                role.as_str()
            );
        }
    }

    #[test]
    fn all_roles_have_discovery_prompt() {
        // Guards against an empty or unsubstituted discovery prompt file.
        for role in Role::iter() {
            if !super::role_info(&role).has_discovery {
                continue;
            }
            let prompt = role.discovery_prompt();
            assert!(
                !prompt.trim().is_empty(),
                "{}: discovery_prompt() must not be empty",
                role.as_str()
            );
            assert!(
                !crate::prompt::TEMPLATE_RE.is_match(&prompt),
                "{}: discovery prompt must not contain unsubstituted template keys",
                role.as_str()
            );
        }
    }
}