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

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::models::prs::PrTemplate;
use crate::service::AppService;
use crate::service::pr::templates::{CreatePrTemplateParams, UpdatePrTemplateParams};
use crate::session::Session;

#[derive(Debug, Deserialize, IntoParams)]
pub struct PathParams {
    pub workspace_name: String,
    pub repo_name: String,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct TemplatePathParams {
    pub workspace_name: String,
    pub repo_name: String,
    pub template_id: uuid::Uuid,
}

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

#[utoipa::path(
    get,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/prs/templates",
    tag = "PullRequests",
    operation_id = "prListTemplates",
    params(PathParams, QueryParams),
    responses(
        (status = 200, description = "List of PR templates", body = ApiResponse<Vec<PrTemplate>>),
        (status = 401, description = "Unauthorized", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn list_templates(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    query: web::Query<QueryParams>,
) -> Result<HttpResponse, AppError> {
    let result = service
        .pr
        .pr_templates(
            &session,
            &path.workspace_name,
            &path.repo_name,
            query.limit.unwrap_or(50),
            query.offset.unwrap_or(0),
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(result)))
}

#[utoipa::path(
    post,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/prs/templates",
    tag = "PullRequests",
    operation_id = "prCreateTemplate",
    params(PathParams),
    request_body(content = CreatePrTemplateParams),
    responses(
        (status = 201, description = "Template created", body = ApiResponse<PrTemplate>),
        (status = 401, description = "Unauthorized", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn create_template(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    body: web::Json<CreatePrTemplateParams>,
) -> Result<HttpResponse, AppError> {
    let result = service
        .pr
        .pr_create_template(
            &session,
            &path.workspace_name,
            &path.repo_name,
            body.into_inner(),
        )
        .await?;
    Ok(HttpResponse::Created().json(ApiResponse::new(result)))
}

#[utoipa::path(
    put,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/prs/templates/{template_id}",
    tag = "PullRequests",
    operation_id = "prUpdateTemplate",
    params(TemplatePathParams),
    request_body(content = UpdatePrTemplateParams),
    responses(
        (status = 200, description = "Template updated", body = ApiResponse<PrTemplate>),
        (status = 401, description = "Unauthorized", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn update_template(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<TemplatePathParams>,
    body: web::Json<UpdatePrTemplateParams>,
) -> Result<HttpResponse, AppError> {
    let result = service
        .pr
        .pr_update_template(
            &session,
            &path.workspace_name,
            &path.repo_name,
            path.template_id,
            body.into_inner(),
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(result)))
}

#[utoipa::path(
    delete,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/prs/templates/{template_id}",
    tag = "PullRequests",
    operation_id = "prDeleteTemplate",
    params(TemplatePathParams),
    responses(
        (status = 200, description = "Template deleted", body = ApiResponse<String>),
        (status = 401, description = "Unauthorized", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn delete_template(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<TemplatePathParams>,
) -> Result<HttpResponse, AppError> {
    service
        .pr
        .pr_delete_template(
            &session,
            &path.workspace_name,
            &path.repo_name,
            path.template_id,
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new("template deleted".to_string())))
}