use actix_web::{web, HttpResponse};
use serde::Deserialize;
use utoipa::IntoParams;

use crate::api::response::{ApiResponse, ApiErrorResponse};
use crate::error::AppError;
use crate::service::AppService;
use crate::session::Session;
use crate::service::repo::watches::WatchParams;

#[derive(Debug, Deserialize, IntoParams)]
pub struct PathParams {
    /// Workspace name (unique identifier)
    pub workspace_name: String,
    /// Repository name (unique within the workspace)
    pub repo_name: String,
}

/// Watch a repository
///
/// Subscribes the current user to notifications for repository activities.
/// Requires read access to the repository.
/// 
/// Watch levels:
/// - "participating": Notifications for issues/PRs you're involved in
/// - "watching": All repository notifications (default)
/// - "ignoring": No notifications
/// 
/// Returns success message on completion. Idempotent operation.
#[utoipa::path(
    post,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/watch",
    tag = "Repos",
    operation_id = "repoWatch",
    params(PathParams),
    request_body(
        content = WatchParams,
        description = "Watch parameters (level is optional, defaults to 'watching')",
        content_type = "application/json"
    ),
    responses(
        (status = 200, description = "Repository watch subscription updated successfully.", body = ApiResponse<String>),
        (status = 400, description = "Invalid watch level (must be 'participating', 'watching', or 'ignoring')", body = ApiErrorResponse),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "Insufficient permissions to access this repository", body = ApiErrorResponse),
        (status = 404, description = "Repository or workspace not found", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn watch_repo(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    params: web::Json<WatchParams>,
) -> Result<HttpResponse, AppError> {
    service
        .repo
        .repo_watch(&session, &path.workspace_name, &path.repo_name, params.into_inner())
        .await?;

    Ok(HttpResponse::Ok().json(ApiResponse::new("Repository watch subscription updated successfully".to_string())))
}