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

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

#[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,
}

#[derive(Debug, Deserialize, IntoParams)]
pub struct QueryParams {
    /// Maximum number of branches to return (default: 50, max: 100)
    pub limit: Option<i64>,
    /// Number of branches to skip for pagination (default: 0)
    pub offset: Option<i64>,
}

/// List branches in a repository
///
/// Returns a paginated list of all branches in the repository, sorted by name alphabetically.
/// Includes branch metadata such as:
/// - Branch name and commit SHA
/// - Protected status
/// - Default branch flag
/// - Last push information
/// 
/// Requires read access to the repository.
#[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. Returns an array of branch objects with metadata.", body = ApiResponse<Vec<RepoBranch>>),
        (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 list_branches(
    service: web::Data<AppService>,
    session: Session,
    path: web::Path<PathParams>,
    query: web::Query<QueryParams>,
) -> Result<HttpResponse, AppError> {
    let branches = service
        .repo
        .repo_branches(
            &session,
            &path.workspace_name,
            &path.repo_name,
            query.limit.unwrap_or(50),
            query.offset.unwrap_or(0),
        )
        .await?;

    Ok(HttpResponse::Ok().json(ApiResponse::new(branches)))
}