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

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::models::notifications::NotificationTemplate;
use crate::service::AppService;
use crate::session::Session;

#[derive(Debug, Deserialize, IntoParams)]
pub struct QueryParams {
    pub limit: Option<i64>,
    pub offset: Option<i64>,
}

/// List notification templates (requires system admin)
#[utoipa::path(
    get,
    path = "/api/v1/notifications/templates",
    tag = "Notifications",
    operation_id = "notificationListTemplates",
    params(QueryParams),
    responses(
        (status = 200, description = "Templates listed successfully", body = ApiResponse<Vec<NotificationTemplate>>),
        (status = 401, description = "Authentication required or session expired", body = ApiErrorResponse),
        (status = 403, description = "System admin access required", body = ApiErrorResponse),
        (status = 500, description = "Internal server error", body = ApiErrorResponse),
    ),
    security(
        ("session_cookie" = [])
    )
)]
pub async fn list_templates(
    service: web::Data<AppService>,
    session: Session,
    query: web::Query<QueryParams>,
) -> Result<HttpResponse, AppError> {
    let result = service
        .notify
        .list_templates(
            &session,
            query.limit.unwrap_or(50),
            query.offset.unwrap_or(0),
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(result)))
}