//! Agent-related API routes.
//!
//! Endpoints:
//!
//! - `GET  /api/agents`         — list available agents
//! - `POST /api/agents/refresh` — refresh agent list (e.g. after new agent is added to the system)
//! - `POST /api/agents/test`    — test custom agent configuration (e.g. LLM connection)
//! - `PATCH /api/agents/{id}/team-capable` — manual `supports_team` override

use axum::Router;
use axum::extract::rejection::JsonRejection;
use axum::extract::{Extension, Json, Path, State};
use axum::routing::{get, patch, post, put};

use nomifun_api_types::{
    AcpHealthCheckRequest, AcpHealthCheckResponse, AgentMetadata, ApiResponse, CustomAgentUpsertRequest,
    DeleteCustomAgentResponse, ProviderHealthCheckRequest, ProviderHealthCheckResponse, SetEnabledRequest,
    SetTeamCapableRequest, TryConnectCustomAgentRequest, TryConnectCustomAgentResponse,
};
use nomifun_auth::CurrentUser;
use nomifun_common::AppError;

use crate::routes::state::AgentRouterState;

pub fn agent_routes(state: AgentRouterState) -> Router {
    Router::new()
        .route("/api/agents", get(list_agents))
        .route("/api/agents/refresh", post(refresh_agents))
        .route("/api/agents/health-check", post(health_check))
        .route("/api/agents/provider-health-check", post(provider_health_check))
        .route("/api/agents/{id}/enabled", patch(set_agent_enabled))
        .route("/api/agents/{id}/team-capable", patch(set_agent_team_capable))
        .route("/api/agents/custom", post(create_custom))
        .route("/api/agents/custom/{id}", put(update_custom).delete(delete_custom))
        .route("/api/agents/custom/try-connect", post(try_connect_custom))
        .with_state(state)
}

async fn list_agents(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
) -> Result<Json<ApiResponse<Vec<AgentMetadata>>>, AppError> {
    Ok(Json(ApiResponse::ok(state.service.list_agents().await?)))
}

async fn refresh_agents(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
) -> Result<Json<ApiResponse<Vec<AgentMetadata>>>, AppError> {
    Ok(Json(ApiResponse::ok(state.service.refresh_agents().await?)))
}

async fn health_check(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
    body: Result<Json<AcpHealthCheckRequest>, JsonRejection>,
) -> Result<Json<ApiResponse<AcpHealthCheckResponse>>, AppError> {
    let Json(req) = body.map_err(|e| AppError::BadRequest(e.to_string()))?;
    Ok(Json(ApiResponse::ok(state.service.acp_health_check(req).await?)))
}

async fn provider_health_check(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
    body: Result<Json<ProviderHealthCheckRequest>, JsonRejection>,
) -> Result<Json<ApiResponse<ProviderHealthCheckResponse>>, AppError> {
    let Json(req) = body.map_err(|e| AppError::BadRequest(e.to_string()))?;
    Ok(Json(ApiResponse::ok(state.service.provider_health_check(req).await?)))
}

async fn try_connect_custom(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
    body: Result<Json<TryConnectCustomAgentRequest>, JsonRejection>,
) -> Result<Json<ApiResponse<TryConnectCustomAgentResponse>>, AppError> {
    let Json(req) = body.map_err(|e| AppError::BadRequest(e.to_string()))?;
    Ok(Json(ApiResponse::ok(
        state.service.try_connect_custom_agent(req).await?,
    )))
}

async fn create_custom(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
    body: Result<Json<CustomAgentUpsertRequest>, JsonRejection>,
) -> Result<Json<ApiResponse<AgentMetadata>>, AppError> {
    let Json(req) = body.map_err(|e| AppError::BadRequest(e.to_string()))?;
    Ok(Json(ApiResponse::ok(state.service.create_custom_agent(req).await?)))
}

async fn update_custom(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
    Path(id): Path<String>,
    body: Result<Json<CustomAgentUpsertRequest>, JsonRejection>,
) -> Result<Json<ApiResponse<AgentMetadata>>, AppError> {
    let Json(req) = body.map_err(|e| AppError::BadRequest(e.to_string()))?;
    Ok(Json(ApiResponse::ok(
        state.service.update_custom_agent(&id, req).await?,
    )))
}

async fn delete_custom(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
    Path(id): Path<String>,
) -> Result<Json<ApiResponse<DeleteCustomAgentResponse>>, AppError> {
    state.service.delete_custom_agent(&id).await?;
    Ok(Json(ApiResponse::ok(DeleteCustomAgentResponse { deleted: true })))
}

async fn set_agent_enabled(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
    Path(id): Path<String>,
    body: Result<Json<SetEnabledRequest>, JsonRejection>,
) -> Result<Json<ApiResponse<AgentMetadata>>, AppError> {
    let Json(req) = body.map_err(|e| AppError::BadRequest(e.to_string()))?;
    Ok(Json(ApiResponse::ok(
        state.service.set_agent_enabled(&id, req.enabled).await?,
    )))
}

async fn set_agent_team_capable(
    State(state): State<AgentRouterState>,
    Extension(_user): Extension<CurrentUser>,
    Path(id): Path<String>,
    body: Result<Json<SetTeamCapableRequest>, JsonRejection>,
) -> Result<Json<ApiResponse<AgentMetadata>>, AppError> {
    let Json(req) = body.map_err(|e| AppError::BadRequest(e.to_string()))?;
    Ok(Json(ApiResponse::ok(
        state.service.set_agent_team_capable(&id, req.supports_team).await?,
    )))
}