//! `#[tauri::command]` handlers — the **driving adapters** (frontend → backend).
//!
//! Each handler is a thin shell: deserialise the DTO, call the use case from
//! [`AppState`], map `Result<Output, AppError>` to `Result<ResponseDto,
//! ErrorDto>`. No business logic lives here.

use tauri::ipc::Channel;
use tauri::State;

use application::{
    AppError, CloseProjectInput, CreateAgentInput, CreateLayoutInput, DeleteAgentInput,
    DeleteLayoutInput, DeleteTemplateInput, DetectAgentDriftInput, GitBranchesInput,
    GitCheckoutInput, GitCommitInput, GitGraphInput, GitInitInput, GitLogInput, GitStagePathInput,
    GitStatusInput, LaunchAgentInput, ListAgentsInput, ListLayoutsInput, LoadLayoutInput,
    MutateLayoutInput, OpenProjectInput, ReadAgentContextInput, RenameLayoutInput,
    SetActiveLayoutInput, SyncAgentWithTemplateInput, UpdateAgentContextInput,
};
use domain::ports::PtyHandle;

use crate::dto::{
    parse_agent_id, parse_close_terminal, parse_delete_profile, parse_layout_id, parse_profile_id,
    parse_project_id, parse_session_id, parse_template_id, AgentDriftListDto, AgentDto,
    AgentListDto, ConfigureProfilesRequestDto, CreateAgentFromTemplateRequestDto,
    CreateAgentRequestDto, CreateLayoutRequestDto, CreateLayoutResultDto, CreateProjectRequestDto,
    CreateTemplateRequestDto, DeleteLayoutRequestDto, DeleteLayoutResultDto,
    DetectProfilesRequestDto, DetectProfilesResponseDto, ErrorDto, FirstRunStateDto,
    GitBranchesDto, GitCheckoutRequestDto, GitCommitDto, GitCommitListDto, GitCommitRequestDto,
    GitStageRequestDto, GitStatusListDto, GraphCommitListDto, HealthRequestDto, HealthResponseDto,
    LaunchAgentRequestDto, LayoutDto, LayoutOperationDto, ListLayoutsDto, OpenTerminalRequestDto,
    ProfileDto, ProfileListDto, ProjectDto, ProjectListDto, ReadAgentContextResponseDto,
    RenameLayoutRequestDto, ResizeTerminalRequestDto, SaveProfileRequestDto,
    SetActiveLayoutRequestDto, SyncAgentWithTemplateRequestDto, SyncResultDto, TemplateDto,
    TemplateListDto, TerminalClosedDto, TerminalSessionDto, UpdateAgentContextRequestDto,
    UpdateTemplateRequestDto, WriteTerminalRequestDto,
};
use crate::pty::{PtyBridge, PtyChunk};
use crate::state::AppState;

/// `health` — trivial command validating the full IPC pipeline
/// (frontend gateway → invoke → command → use case → ports → event relay).
///
/// # Errors
/// Returns an [`ErrorDto`] if the use case fails.
#[tauri::command]
pub fn health(
    request: Option<HealthRequestDto>,
    state: State<'_, AppState>,
) -> Result<HealthResponseDto, ErrorDto> {
    let input = request.unwrap_or_default().into();
    state
        .health
        .execute(input)
        .map(HealthResponseDto::from)
        .map_err(ErrorDto::from)
}

/// `create_project` — create a project from a root: init `.ideai/`, register it.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad root/name or a duplicate
/// `(remote, root)`, `FILESYSTEM`/`STORE` on I/O failure).
#[tauri::command]
pub async fn create_project(
    request: CreateProjectRequestDto,
    state: State<'_, AppState>,
) -> Result<ProjectDto, ErrorDto> {
    state
        .create_project
        .execute(request.into())
        .await
        .map(ProjectDto::from)
        .map_err(ErrorDto::from)
}

/// `open_project` — load a project and its `.ideai/` meta/manifest.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project is unknown, `STORE` on registry I/O failure).
#[tauri::command]
pub async fn open_project(
    project_id: String,
    state: State<'_, AppState>,
) -> Result<ProjectDto, ErrorDto> {
    let id = parse_project_id(&project_id)?;
    state
        .open_project
        .execute(OpenProjectInput { project_id: id })
        .await
        .map(ProjectDto::from)
        .map_err(ErrorDto::from)
}

/// `close_project` — persist state and release resources for a project.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `STORE` on failure).
#[tauri::command]
pub async fn close_project(
    project_id: String,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let id = parse_project_id(&project_id)?;
    state
        .close_project
        .execute(CloseProjectInput {
            project_id: id,
            // L2 has no UI-side workspace mutations to persist yet.
            workspace: None,
        })
        .await
        .map(|_| ())
        .map_err(ErrorDto::from)
}

/// `list_projects` — list the projects known to the registry.
///
/// # Errors
/// Returns an [`ErrorDto`] (`STORE` on registry I/O failure).
#[tauri::command]
pub async fn list_projects(state: State<'_, AppState>) -> Result<ProjectListDto, ErrorDto> {
    state
        .list_projects
        .execute()
        .await
        .map(ProjectListDto::from)
        .map_err(ErrorDto::from)
}

// ---------------------------------------------------------------------------
// Terminals (L3)
// ---------------------------------------------------------------------------

/// `open_terminal` — spawn a PTY and wire its byte stream to the frontend.
///
/// The frontend passes a per-session [`Channel`] (xterm's output sink). We:
/// 1. run [`application::OpenTerminal`] (spawn the PTY, register the session),
/// 2. register the channel in the [`PtyBridge`] keyed by the new session id,
/// 3. start a pump that drains the PTY's blocking output stream and forwards
///    each chunk through the bridge to that channel.
///
/// Returns the [`TerminalSessionDto`] (its `sessionId` is what `write`/`resize`/
/// `close` reference).
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad cwd/size, `PROCESS` if the PTY
/// fails to spawn or its output cannot be subscribed).
#[tauri::command]
pub async fn open_terminal(
    request: OpenTerminalRequestDto,
    on_output: Channel<PtyChunk>,
    state: State<'_, AppState>,
) -> Result<TerminalSessionDto, ErrorDto> {
    let output = state
        .open_terminal
        .execute(request.into())
        .await
        .map_err(ErrorDto::from)?;
    let session_id = output.session.id;

    // (2) Register the xterm output channel for this session.
    state.pty_bridge.register(session_id, on_output);

    // (3) Subscribe to the PTY's byte stream and pump it to the channel. The
    // stream is a blocking iterator, so it runs on a dedicated OS thread; it
    // ends when the PTY hits EOF (process exit) or the bridge channel is gone.
    let handle = PtyHandle { session_id };
    match state.pty_port.subscribe_output(&handle) {
        Ok(stream) => {
            let bridge: std::sync::Arc<PtyBridge> = std::sync::Arc::clone(&state.pty_bridge);
            std::thread::spawn(move || {
                for chunk in stream {
                    if !bridge.send_output(&session_id, chunk) {
                        break;
                    }
                }
                // Stream ended (process exited): drop the channel registration.
                bridge.unregister(&session_id);
            });
        }
        Err(e) => {
            state.pty_bridge.unregister(&session_id);
            return Err(ErrorDto::from(application::AppError::from(e)));
        }
    }

    Ok(TerminalSessionDto::from(output))
}

/// `write_terminal` — forward bytes (xterm keystrokes) to a live PTY.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// session is unknown, `PROCESS` on PTY I/O failure).
#[tauri::command]
pub fn write_terminal(
    request: WriteTerminalRequestDto,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let input = request.into_input()?;
    state
        .write_terminal
        .execute(input)
        .map_err(ErrorDto::from)
}

/// `resize_terminal` — resize a live PTY.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id/size, `NOT_FOUND` if the
/// session is unknown, `PROCESS` on failure).
#[tauri::command]
pub fn resize_terminal(
    request: ResizeTerminalRequestDto,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let input = request.into_input()?;
    state
        .resize_terminal
        .execute(input)
        .map_err(ErrorDto::from)
}

/// `close_terminal` — kill a live PTY and tear down its channel.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// session is unknown, `PROCESS` if the kill fails).
#[tauri::command]
pub async fn close_terminal(
    session_id: String,
    state: State<'_, AppState>,
) -> Result<TerminalClosedDto, ErrorDto> {
    let input = parse_close_terminal(&session_id)?;
    let sid = parse_session_id(&session_id)?;
    let result = state
        .close_terminal
        .execute(input)
        .await
        .map(TerminalClosedDto::from)
        .map_err(ErrorDto::from);
    // Tear down the channel regardless of kill outcome.
    state.pty_bridge.unregister(&sid);
    result
}

// ---------------------------------------------------------------------------
// Layout (L4)
// ---------------------------------------------------------------------------

/// `load_layout` — read a project's named layout (the active one when `layout_id`
/// is omitted).
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project or layout is unknown, `STORE` on registry I/O failure).
#[tauri::command]
pub async fn load_layout(
    project_id: String,
    layout_id: Option<String>,
    state: State<'_, AppState>,
) -> Result<LayoutDto, ErrorDto> {
    let id = parse_project_id(&project_id)?;
    let lid = layout_id.as_deref().map(parse_layout_id).transpose()?;
    state
        .load_layout
        .execute(LoadLayoutInput {
            project_id: id,
            layout_id: lid,
        })
        .await
        .map(LayoutDto::from)
        .map_err(ErrorDto::from)
}

/// `mutate_layout` — apply a split/merge/resize/move/setSession/setCellAgent
/// operation, persist the result and announce `LayoutChanged`.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id/operation or an invariant
/// violation, `NOT_FOUND` for an unknown project/node, `FILESYSTEM`/`STORE` on I/O
/// failure).
#[tauri::command]
pub async fn mutate_layout(
    project_id: String,
    layout_id: Option<String>,
    operation: LayoutOperationDto,
    state: State<'_, AppState>,
) -> Result<LayoutDto, ErrorDto> {
    let id = parse_project_id(&project_id)?;
    let lid = layout_id.as_deref().map(parse_layout_id).transpose()?;
    let operation = operation.into_operation()?;
    state
        .mutate_layout
        .execute(MutateLayoutInput {
            project_id: id,
            layout_id: lid,
            operation,
        })
        .await
        .map(LayoutDto::from)
        .map_err(ErrorDto::from)
}

// ---------------------------------------------------------------------------
// Named-layout management (#4)
// ---------------------------------------------------------------------------

/// `list_layouts` — list all named layouts of a project and the active one.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project is unknown, `STORE`/`FILESYSTEM` on I/O failure).
#[tauri::command]
pub async fn list_layouts(
    project_id: String,
    state: State<'_, AppState>,
) -> Result<ListLayoutsDto, ErrorDto> {
    let id = parse_project_id(&project_id)?;
    state
        .list_layouts
        .execute(ListLayoutsInput { project_id: id })
        .await
        .map(ListLayoutsDto::from)
        .map_err(ErrorDto::from)
}

/// `create_layout` — create a new empty named layout and make it active.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for empty name or malformed id, `NOT_FOUND`
/// if the project is unknown, `STORE`/`FILESYSTEM` on I/O failure).
#[tauri::command]
pub async fn create_layout(
    request: CreateLayoutRequestDto,
    state: State<'_, AppState>,
) -> Result<CreateLayoutResultDto, ErrorDto> {
    let project_id = parse_project_id(&request.project_id)?;
    let kind = request.parse_kind()?;
    state
        .create_layout
        .execute(CreateLayoutInput {
            project_id,
            name: request.name,
            kind,
        })
        .await
        .map(CreateLayoutResultDto::from)
        .map_err(ErrorDto::from)
}

/// `rename_layout` — rename a named layout.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for empty name or malformed id, `NOT_FOUND`
/// if the project or layout is unknown).
#[tauri::command]
pub async fn rename_layout(
    request: RenameLayoutRequestDto,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let project_id = parse_project_id(&request.project_id)?;
    let layout_id = parse_layout_id(&request.layout_id)?;
    state
        .rename_layout
        .execute(RenameLayoutInput {
            project_id,
            layout_id,
            name: request.name,
        })
        .await
        .map_err(ErrorDto::from)
}

/// `delete_layout` — delete a named layout (cannot be the last one).
///
/// Returns the active layout id after the deletion.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for malformed id or last layout attempt,
/// `NOT_FOUND` if the project or layout is unknown).
#[tauri::command]
pub async fn delete_layout(
    request: DeleteLayoutRequestDto,
    state: State<'_, AppState>,
) -> Result<DeleteLayoutResultDto, ErrorDto> {
    let project_id = parse_project_id(&request.project_id)?;
    let layout_id = parse_layout_id(&request.layout_id)?;
    state
        .delete_layout
        .execute(DeleteLayoutInput {
            project_id,
            layout_id,
        })
        .await
        .map(DeleteLayoutResultDto::from)
        .map_err(ErrorDto::from)
}

/// `set_active_layout` — switch the active named layout of a project.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for malformed id, `NOT_FOUND` if the
/// project or layout is unknown).
#[tauri::command]
pub async fn set_active_layout(
    request: SetActiveLayoutRequestDto,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let project_id = parse_project_id(&request.project_id)?;
    let layout_id = parse_layout_id(&request.layout_id)?;
    state
        .set_active_layout
        .execute(SetActiveLayoutInput {
            project_id,
            layout_id,
        })
        .await
        .map_err(ErrorDto::from)
}

// ---------------------------------------------------------------------------
// Profiles & first-run (L5)
// ---------------------------------------------------------------------------

/// `first_run_state` — whether the first-run wizard should show (no
/// `profiles.json` yet) plus the pre-filled reference catalogue to seed it.
///
/// # Errors
/// Returns an [`ErrorDto`] (`STORE` on profiles I/O failure).
#[tauri::command]
pub async fn first_run_state(state: State<'_, AppState>) -> Result<FirstRunStateDto, ErrorDto> {
    state
        .first_run_state
        .execute()
        .await
        .map(FirstRunStateDto::from)
        .map_err(ErrorDto::from)
}

/// `reference_profiles` — the pre-filled, editable reference catalogue
/// (Claude/Codex/Gemini/Aider).
///
/// # Errors
/// Returns an [`ErrorDto`] (never in practice; the catalogue is in-memory).
#[tauri::command]
pub async fn reference_profiles(state: State<'_, AppState>) -> Result<ProfileListDto, ErrorDto> {
    state
        .reference_profiles
        .execute()
        .await
        .map(ProfileListDto::from)
        .map_err(ErrorDto::from)
}

/// `detect_profiles` — probe each candidate profile's detection command and
/// report which CLIs are installed (✓/✗).
///
/// # Errors
/// Returns an [`ErrorDto`] (detection failures degrade to `available: false`).
#[tauri::command]
pub async fn detect_profiles(
    request: DetectProfilesRequestDto,
    state: State<'_, AppState>,
) -> Result<DetectProfilesResponseDto, ErrorDto> {
    state
        .detect_profiles
        .execute(request.into())
        .await
        .map(DetectProfilesResponseDto::from)
        .map_err(ErrorDto::from)
}

/// `list_profiles` — list the configured profiles.
///
/// # Errors
/// Returns an [`ErrorDto`] (`STORE` on profiles I/O failure).
#[tauri::command]
pub async fn list_profiles(state: State<'_, AppState>) -> Result<ProfileListDto, ErrorDto> {
    state
        .list_profiles
        .execute()
        .await
        .map(ProfileListDto::from)
        .map_err(ErrorDto::from)
}

/// `save_profile` — create or replace (by id) a single profile.
///
/// # Errors
/// Returns an [`ErrorDto`] (`STORE` on profiles I/O failure).
#[tauri::command]
pub async fn save_profile(
    request: SaveProfileRequestDto,
    state: State<'_, AppState>,
) -> Result<ProfileDto, ErrorDto> {
    state
        .save_profile
        .execute(request.into())
        .await
        .map(ProfileDto::from)
        .map_err(ErrorDto::from)
}

/// `delete_profile` — delete a profile by id.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if absent,
/// `STORE` on failure).
#[tauri::command]
pub async fn delete_profile(
    profile_id: String,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let input = parse_delete_profile(&profile_id)?;
    state
        .delete_profile
        .execute(input)
        .await
        .map_err(ErrorDto::from)
}

/// `configure_profiles` — persist the batch of chosen/edited/custom profiles,
/// closing the first run.
///
/// # Errors
/// Returns an [`ErrorDto`] (`STORE` on profiles I/O failure).
#[tauri::command]
pub async fn configure_profiles(
    request: ConfigureProfilesRequestDto,
    state: State<'_, AppState>,
) -> Result<ProfileListDto, ErrorDto> {
    state
        .configure_profiles
        .execute(request.into())
        .await
        .map(ProfileListDto::from)
        .map_err(ErrorDto::from)
}

// ---------------------------------------------------------------------------
// Agents (L6)
// ---------------------------------------------------------------------------

/// Resolves a [`domain::Project`] by id, mapping `StoreError` → `AppError` → `ErrorDto`.
async fn resolve_project(
    project_id: &str,
    state: &State<'_, AppState>,
) -> Result<domain::Project, ErrorDto> {
    let id = parse_project_id(project_id)?;
    state
        .project_store
        .load_project(id)
        .await
        .map_err(|e| ErrorDto::from(AppError::from(e)))
}

/// `create_agent` — create a new project agent from scratch.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad id/name, `NOT_FOUND` if the
/// project is unknown, `STORE` on I/O failure).
#[tauri::command]
pub async fn create_agent(
    request: CreateAgentRequestDto,
    state: State<'_, AppState>,
) -> Result<AgentDto, ErrorDto> {
    let project = resolve_project(&request.project_id, &state).await?;
    let profile_id = parse_profile_id(&request.profile_id)?;
    state
        .create_agent
        .execute(CreateAgentInput {
            project,
            name: request.name,
            profile_id,
            initial_content: request.initial_content,
        })
        .await
        .map(AgentDto::from)
        .map_err(ErrorDto::from)
}

/// `list_agents` — list the agents of a project.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project is unknown, `STORE` on I/O failure).
#[tauri::command]
pub async fn list_agents(
    project_id: String,
    state: State<'_, AppState>,
) -> Result<AgentListDto, ErrorDto> {
    let project = resolve_project(&project_id, &state).await?;
    state
        .list_agents
        .execute(ListAgentsInput { project })
        .await
        .map(AgentListDto::from)
        .map_err(ErrorDto::from)
}

/// `read_agent_context` — read an agent's Markdown context.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project or agent is unknown, `STORE` on I/O failure).
#[tauri::command]
pub async fn read_agent_context(
    project_id: String,
    agent_id: String,
    state: State<'_, AppState>,
) -> Result<ReadAgentContextResponseDto, ErrorDto> {
    let project = resolve_project(&project_id, &state).await?;
    let agent_id = parse_agent_id(&agent_id)?;
    state
        .read_agent_context
        .execute(ReadAgentContextInput { project, agent_id })
        .await
        .map(ReadAgentContextResponseDto::from)
        .map_err(ErrorDto::from)
}

/// `update_agent_context` — overwrite an agent's Markdown context.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project or agent is unknown, `STORE` on I/O failure).
#[tauri::command]
pub async fn update_agent_context(
    request: UpdateAgentContextRequestDto,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let project = resolve_project(&request.project_id, &state).await?;
    let agent_id = parse_agent_id(&request.agent_id)?;
    state
        .update_agent_context
        .execute(UpdateAgentContextInput {
            project,
            agent_id,
            content: request.content,
        })
        .await
        .map_err(ErrorDto::from)
}

/// `delete_agent` — remove an agent from the project manifest.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project or agent is unknown, `STORE` on I/O failure).
#[tauri::command]
pub async fn delete_agent(
    project_id: String,
    agent_id: String,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let project = resolve_project(&project_id, &state).await?;
    let agent_id = parse_agent_id(&agent_id)?;
    state
        .delete_agent
        .execute(DeleteAgentInput { project, agent_id })
        .await
        .map_err(ErrorDto::from)
}

/// `launch_agent` — spawn an agent's CLI in a PTY and wire its byte stream to
/// the frontend via a [`Channel`].
///
/// Mirrors `open_terminal`: execute the use case (spawn + register session),
/// register the xterm channel in the [`PtyBridge`], then pump PTY output to
/// that channel on a dedicated OS thread.
///
/// Returns the [`TerminalSessionDto`] (its `sessionId` is what
/// `write`/`resize`/`close` reference).
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad id/size, `NOT_FOUND` if the
/// project, agent or profile is unknown, `PROCESS` if the PTY fails to spawn).
#[tauri::command]
pub async fn launch_agent(
    request: LaunchAgentRequestDto,
    on_output: Channel<PtyChunk>,
    state: State<'_, AppState>,
) -> Result<TerminalSessionDto, ErrorDto> {
    let project = resolve_project(&request.project_id, &state).await?;
    let agent_id = parse_agent_id(&request.agent_id)?;

    let output = state
        .launch_agent
        .execute(LaunchAgentInput {
            project,
            agent_id,
            rows: request.rows,
            cols: request.cols,
            node_id: None,
        })
        .await
        .map_err(ErrorDto::from)?;

    let session_id = output.session.id;

    // Register the xterm output channel for this session.
    state.pty_bridge.register(session_id, on_output);

    // Subscribe to the PTY's byte stream and pump it to the channel.
    // The stream is a blocking iterator; it runs on a dedicated OS thread and
    // ends when the PTY hits EOF or the bridge channel is gone.
    let handle = PtyHandle { session_id };
    match state.pty_port.subscribe_output(&handle) {
        Ok(stream) => {
            let bridge: std::sync::Arc<PtyBridge> = std::sync::Arc::clone(&state.pty_bridge);
            std::thread::spawn(move || {
                for chunk in stream {
                    if !bridge.send_output(&session_id, chunk) {
                        break;
                    }
                }
                bridge.unregister(&session_id);
            });
        }
        Err(e) => {
            state.pty_bridge.unregister(&session_id);
            return Err(ErrorDto::from(AppError::from(e)));
        }
    }

    Ok(TerminalSessionDto::from(output))
}

// ---------------------------------------------------------------------------
// Templates & sync (L7)
// ---------------------------------------------------------------------------

/// `create_template` — create a template in the global IDE store.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for an empty name or malformed profile id,
/// `STORE` on persistence failure).
#[tauri::command]
pub async fn create_template(
    request: CreateTemplateRequestDto,
    state: State<'_, AppState>,
) -> Result<TemplateDto, ErrorDto> {
    let input = request.into_input()?;
    state
        .create_template
        .execute(input)
        .await
        .map(TemplateDto::from)
        .map_err(ErrorDto::from)
}

/// `update_template` — update a template's content (bumps version, fires
/// `TemplateUpdated` event).
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// template is unknown, `STORE` on persistence failure).
#[tauri::command]
pub async fn update_template(
    request: UpdateTemplateRequestDto,
    state: State<'_, AppState>,
) -> Result<TemplateDto, ErrorDto> {
    let input = request.into_input()?;
    state
        .update_template
        .execute(input)
        .await
        .map(TemplateDto::from)
        .map_err(ErrorDto::from)
}

/// `list_templates` — list all templates in the global IDE store.
///
/// # Errors
/// Returns an [`ErrorDto`] (`STORE` on persistence failure).
#[tauri::command]
pub async fn list_templates(state: State<'_, AppState>) -> Result<TemplateListDto, ErrorDto> {
    state
        .list_templates
        .execute()
        .await
        .map(TemplateListDto::from)
        .map_err(ErrorDto::from)
}

/// `delete_template` — remove a template from the global IDE store.
///
/// Agents previously created from it keep their `.md`; drift detection simply
/// finds nothing to compare against afterwards.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// template is unknown, `STORE` on failure).
#[tauri::command]
pub async fn delete_template(
    template_id: String,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let id = parse_template_id(&template_id)?;
    state
        .delete_template
        .execute(DeleteTemplateInput { template_id: id })
        .await
        .map_err(ErrorDto::from)
}

/// `create_agent_from_template` — instantiate a project agent from a template.
///
/// Copies the template's Markdown content, links the agent origin and version,
/// and records the manifest entry.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project or template is unknown, `STORE` on I/O failure).
#[tauri::command]
pub async fn create_agent_from_template(
    request: CreateAgentFromTemplateRequestDto,
    state: State<'_, AppState>,
) -> Result<AgentDto, ErrorDto> {
    let project = resolve_project(&request.project_id, &state).await?;
    let input = request.into_input(project)?;
    state
        .create_agent_from_template
        .execute(input)
        .await
        .map(|out| AgentDto(out.agent))
        .map_err(ErrorDto::from)
}

/// `detect_agent_drift` — list which synchronized agents are behind their
/// template (version drift).
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project is unknown, `STORE` on I/O failure).
#[tauri::command]
pub async fn detect_agent_drift(
    project_id: String,
    state: State<'_, AppState>,
) -> Result<AgentDriftListDto, ErrorDto> {
    let project = resolve_project(&project_id, &state).await?;
    state
        .detect_agent_drift
        .execute(DetectAgentDriftInput { project })
        .await
        .map(AgentDriftListDto::from)
        .map_err(ErrorDto::from)
}

/// `sync_agent_with_template` — apply the latest template content to a
/// synchronized agent.
///
/// Returns whether a sync was applied and the resulting version.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed id, `NOT_FOUND` if the
/// project, agent or template is unknown, `STORE` on I/O failure).
#[tauri::command]
pub async fn sync_agent_with_template(
    request: SyncAgentWithTemplateRequestDto,
    state: State<'_, AppState>,
) -> Result<SyncResultDto, ErrorDto> {
    let project = resolve_project(&request.project_id, &state).await?;
    let agent_id = parse_agent_id(&request.agent_id)?;
    state
        .sync_agent_with_template
        .execute(SyncAgentWithTemplateInput { project, agent_id })
        .await
        .map(SyncResultDto::from)
        .map_err(ErrorDto::from)
}

// ---------------------------------------------------------------------------
// Git (L8)
// ---------------------------------------------------------------------------

/// `git_status` — report the working-tree status of a project's repository.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad project id or root, `GIT` if
/// the repo is missing or the operation fails).
#[tauri::command]
pub async fn git_status(
    project_id: String,
    state: State<'_, AppState>,
) -> Result<GitStatusListDto, ErrorDto> {
    let project = resolve_project(&project_id, &state).await?;
    let root = project.root.as_str().to_owned();
    state
        .git_status
        .execute(GitStatusInput { root })
        .await
        .map(GitStatusListDto::from)
        .map_err(ErrorDto::from)
}

/// `git_stage` — stage a path in a project's repository.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad project id or root, `GIT` on
/// failure).
#[tauri::command]
pub async fn git_stage(
    request: GitStageRequestDto,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let project = resolve_project(&request.project_id, &state).await?;
    let root = project.root.as_str().to_owned();
    state
        .git_stage
        .execute(GitStagePathInput {
            root,
            path: request.path,
        })
        .await
        .map_err(ErrorDto::from)
}

/// `git_unstage` — unstage a path in a project's repository.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad project id or root, `GIT` on
/// failure).
#[tauri::command]
pub async fn git_unstage(
    request: GitStageRequestDto,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let project = resolve_project(&request.project_id, &state).await?;
    let root = project.root.as_str().to_owned();
    state
        .git_unstage
        .execute(GitStagePathInput {
            root,
            path: request.path,
        })
        .await
        .map_err(ErrorDto::from)
}

/// `git_commit` — create a commit in a project's repository.
///
/// Announces [`DomainEvent::GitStateChanged`].
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad id or an empty message, `GIT`
/// on failure).
#[tauri::command]
pub async fn git_commit(
    request: GitCommitRequestDto,
    state: State<'_, AppState>,
) -> Result<GitCommitDto, ErrorDto> {
    let project = resolve_project(&request.project_id, &state).await?;
    let root = project.root.as_str().to_owned();
    state
        .git_commit
        .execute(GitCommitInput {
            project_id: project.id,
            root,
            message: request.message,
        })
        .await
        .map(GitCommitDto::from)
        .map_err(ErrorDto::from)
}

/// `git_branches` — list branches and the current one for a project's repository.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad project id or root, `GIT` on
/// failure).
#[tauri::command]
pub async fn git_branches(
    project_id: String,
    state: State<'_, AppState>,
) -> Result<GitBranchesDto, ErrorDto> {
    let project = resolve_project(&project_id, &state).await?;
    let root = project.root.as_str().to_owned();
    state
        .git_branches
        .execute(GitBranchesInput { root })
        .await
        .map(GitBranchesDto::from)
        .map_err(ErrorDto::from)
}

/// `git_checkout` — check out a branch in a project's repository.
///
/// Announces [`DomainEvent::GitStateChanged`].
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad project id or root, `GIT` on
/// failure).
#[tauri::command]
pub async fn git_checkout(
    request: GitCheckoutRequestDto,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let project = resolve_project(&request.project_id, &state).await?;
    let root = project.root.as_str().to_owned();
    state
        .git_checkout
        .execute(GitCheckoutInput {
            project_id: project.id,
            root,
            branch: request.branch,
        })
        .await
        .map_err(ErrorDto::from)
}

/// `git_log` — return the recent commit log for a project's repository.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad project id or root, `GIT` on
/// failure).
#[tauri::command]
pub async fn git_log(
    project_id: String,
    limit: usize,
    state: State<'_, AppState>,
) -> Result<GitCommitListDto, ErrorDto> {
    let project = resolve_project(&project_id, &state).await?;
    let root = project.root.as_str().to_owned();
    state
        .git_log
        .execute(GitLogInput { root, limit })
        .await
        .map(GitCommitListDto::from)
        .map_err(ErrorDto::from)
}

/// `git_init` — initialise a git repository at a project's root.
///
/// Announces [`DomainEvent::GitStateChanged`].
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad project id or root, `GIT` on
/// failure).
#[tauri::command]
pub async fn git_init(
    project_id: String,
    state: State<'_, AppState>,
) -> Result<(), ErrorDto> {
    let project = resolve_project(&project_id, &state).await?;
    let root = project.root.as_str().to_owned();
    state
        .git_init
        .execute(GitInitInput {
            project_id: project.id,
            root,
        })
        .await
        .map_err(ErrorDto::from)
}

/// `git_graph` — return the commit graph for all local branches of a project.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a bad project id or root, `GIT` on
/// failure).
#[tauri::command]
pub async fn git_graph(
    project_id: String,
    limit: usize,
    state: State<'_, AppState>,
) -> Result<GraphCommitListDto, ErrorDto> {
    let project = resolve_project(&project_id, &state).await?;
    let root = project.root.as_str().to_owned();
    state
        .git_graph
        .execute(GitGraphInput { root, limit })
        .await
        .map(GraphCommitListDto::from)
        .map_err(ErrorDto::from)
}

// ---------------------------------------------------------------------------
// Windows (L10)
// ---------------------------------------------------------------------------

use application::MoveTabToNewWindowInput;
use crate::dto::{parse_tab_id, MoveTabResultDto};

/// `move_tab_to_new_window` — detach a tab into a brand-new OS window.
///
/// Applies the workspace topology change (the tab is *moved*, not duplicated)
/// and opens a fresh [`tauri::WebviewWindow`]. The session-state handoff to that
/// window (rendering the detached tab) is the L11 multi-window UI work; this
/// command provides the backend primitive and the new OS window.
///
/// # Errors
/// Returns an [`ErrorDto`] (`INVALID` for a malformed tab id, `NOT_FOUND` if the
/// tab is unknown to the persisted workspace, `INTERNAL` if the window fails to
/// open).
#[tauri::command]
pub async fn move_tab_to_new_window(
    app: tauri::AppHandle,
    tab_id: String,
    state: State<'_, AppState>,
) -> Result<MoveTabResultDto, ErrorDto> {
    let tid = parse_tab_id(&tab_id)?;
    let out = state
        .move_tab
        .execute(MoveTabToNewWindowInput { tab_id: tid })
        .await
        .map_err(ErrorDto::from)?;

    let label = format!("win-{}", out.new_window_id);
    tauri::WebviewWindowBuilder::new(&app, &label, tauri::WebviewUrl::App("index.html".into()))
        .title("IdeA")
        .inner_size(1280.0, 800.0)
        .build()
        .map_err(|e| ErrorDto {
            code: "INTERNAL".to_owned(),
            message: e.to_string(),
        })?;

    Ok(MoveTabResultDto::from(out))
}