//! Domain events published on the [`crate::ports::EventBus`] and relayed to the
//! presentation layer (ARCHITECTURE §3.2).

use crate::ids::{AgentId, ProfileId, ProjectId, SessionId, SkillId, TemplateId};
use crate::memory::MemorySlug;
use crate::template::TemplateVersion;

/// Which entry door a processed orchestration request arrived through.
///
/// IdeA exposes the *same* [`crate::OrchestratorService::dispatch`] behind two
/// substitutable driving adapters (ARCHITECTURE §14.3 + cadrage `orchestration-v3`):
/// the `.ideai/requests` filesystem watcher and the MCP server. This tag — set by
/// the adapter that received the request, never inferred in the application — lets
/// the presentation layer surface *how* a delegation came in.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum OrchestrationSource {
    /// A JSON request file dropped under `.ideai/requests/`.
    File,
    /// A `tools/call` on the MCP server.
    Mcp,
}

/// Events emitted by the domain/application as state changes occur.
///
/// Deliberately *not* `Serialize`/`Deserialize`: events are an in-process
/// concern relayed to IPC by an infrastructure adapter, which owns the wire
/// format. `PtyOutput` in particular is usually short-circuited to a Tauri
/// channel rather than serialised here.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum DomainEvent {
    /// A project was created.
    ProjectCreated {
        /// The new project.
        project_id: ProjectId,
    },
    /// An agent was launched in a terminal.
    AgentLaunched {
        /// The agent.
        agent_id: AgentId,
        /// The session it runs in.
        session_id: SessionId,
    },
    /// A target agent produced a synchronous reply to an inter-agent `ask`
    /// (ARCHITECTURE §17.4): the requester sent a task via `agent.message`, IdeA
    /// drove the target's structured session to its turn `Final`, and this is the
    /// observability beacon for that completed rendezvous. Carries the target id and
    /// the reply size (a lightweight metric); the full body is returned to the
    /// requester out-of-band, not in the event payload (the bus stays I/O-free).
    AgentReplied {
        /// The agent that produced the reply.
        agent_id: AgentId,
        /// Number of bytes in the reply content (preview metric, not the payload).
        reply_len: usize,
    },
    /// An agent's process exited.
    AgentExited {
        /// The agent.
        agent_id: AgentId,
        /// Exit code.
        code: i32,
    },
    /// An agent's runtime profile was changed (hot-swap of the AI engine).
    AgentProfileChanged {
        /// The agent.
        agent_id: AgentId,
        /// The new runtime profile it now uses.
        profile_id: ProfileId,
    },
    /// A template was updated (content changed, version bumped).
    TemplateUpdated {
        /// The template.
        template_id: TemplateId,
        /// New version.
        version: TemplateVersion,
    },
    /// A synchronized agent is behind its template.
    AgentDriftDetected {
        /// The drifting agent.
        agent_id: AgentId,
        /// Version the agent is currently at.
        from: TemplateVersion,
        /// Version available from the template.
        to: TemplateVersion,
    },
    /// A synchronized agent received its template update.
    AgentSynced {
        /// The agent.
        agent_id: AgentId,
        /// Version it was brought up to.
        to: TemplateVersion,
    },
    /// A skill was assigned to (or unassigned from) an agent.
    SkillAssigned {
        /// The agent whose skill set changed.
        agent_id: AgentId,
        /// The skill involved.
        skill_id: SkillId,
        /// `true` if assigned, `false` if unassigned.
        assigned: bool,
    },
    /// A tab's layout changed.
    LayoutChanged {
        /// The project whose layout changed.
        project_id: ProjectId,
    },
    /// A remote host connection was established.
    RemoteConnected {
        /// The project on that remote.
        project_id: ProjectId,
    },
    /// Git state for a project changed.
    GitStateChanged {
        /// The project.
        project_id: ProjectId,
    },
    /// An orchestrator request (dropped under `.ideai/requests/`) was processed
    /// by IdeA on behalf of a requester agent (ARCHITECTURE §14.3). Relayed so the
    /// frontend can surface orchestration activity; the resulting cell/tab opens
    /// off the [`AgentLaunched`](Self::AgentLaunched) event for `spawn_agent`.
    OrchestratorRequestProcessed {
        /// Id of the requesting (orchestrator) agent — the request subdirectory.
        requester_id: String,
        /// The action that was processed (`spawn_agent`, `stop_agent`, …).
        action: String,
        /// Whether IdeA handled it successfully.
        ok: bool,
        /// Which entry door the request arrived through (file watcher vs MCP),
        /// tagged by the receiving adapter.
        source: OrchestrationSource,
    },
    /// A memory note was created or updated (`.md` written, index upserted).
    MemorySaved {
        /// The saved note's slug.
        slug: MemorySlug,
    },
    /// A memory note was deleted.
    MemoryDeleted {
        /// The deleted note's slug.
        slug: MemorySlug,
    },
    /// The aggregated `MEMORY.md` index was rebuilt for a project.
    MemoryIndexRebuilt {
        /// The project whose index was rebuilt.
        project_id: ProjectId,
    },
    /// A project's memory grew past the recall budget while no embedder is
    /// configured (strategy `none`): the first moment a semantic embedder would
    /// help (ARCHITECTURE §14.5.5, LOT C3). Published **at most once per session per
    /// project** (and never again once the user chose "ne plus demander"); the
    /// frontend surfaces a one-time, dismissible suggestion. Carries the detected
    /// local environment and the compiled-in capabilities so the UI never proposes
    /// a strategy this binary cannot run.
    EmbedderSuggested {
        /// The project whose memory crossed the budget.
        project_id: ProjectId,
        /// Whether an Ollama-style local embedding server was detected (best-effort).
        ollama_detected: bool,
        /// Ids of the recommended ONNX models already present in the local cache.
        onnx_cached: Vec<String>,
        /// Whether the HTTP capability (`localServer`/`api`) is compiled in.
        vector_http_enabled: bool,
        /// Whether the in-process ONNX capability (`localOnnx`) is compiled in.
        vector_onnx_enabled: bool,
    },
    /// Raw PTY output (usually routed to a dedicated channel, not this bus).
    PtyOutput {
        /// The session.
        session_id: SessionId,
        /// Output bytes.
        bytes: Vec<u8>,
    },
}