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

use crate::api::response::{ApiErrorResponse, ApiResponse};
use crate::error::AppError;
use crate::service::AppService;
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 QueryParams {
    pub limit: Option<i64>,
    pub offset: Option<i64>,
}

#[utoipa::path(
    get,
    path = "/api/v1/workspaces/{workspace_name}/repos/{repo_name}/branches",
    tag = "Repos",
    operation_id = "repoListBranches",
    params(PathParams, QueryParams),
    responses(
        (status = 200, description = "Branches listed successfully", body = ApiResponse<crate::pb::repo::ListBranchesResponse>),
        (status = 401, description = "Authentication required", body = ApiErrorResponse),
        (status = 404, description = "Repository not found", body = ApiErrorResponse),
    ),
    security(("session_cookie" = []))
)]
pub async fn list_branches(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    query: web::Query<QueryParams>,
) -> Result<HttpResponse, AppError> {
    let limit = query.limit.unwrap_or(50).clamp(1, 100);
    let offset = query.offset.unwrap_or(0).max(0);
    let page_size = limit as u32;
    let page_token = if offset > 0 {
        format!("{offset}")
    } else {
        String::new()
    };

    let result = service
        .repo
        .git_list_branches(
            &session,
            &path.workspace_name,
            &path.repo_name,
            None,
            page_size,
            Some(page_token),
        )
        .await?;
    Ok(HttpResponse::Ok().json(ApiResponse::new(result)))
}