using System.Net;

namespace Microservice.Common
{
    /// <summary>
    /// API 响应工具类
    /// </summary>
    public static class ApiResponseHelper
    {
        /// <summary>
        /// 生成成功响应
        /// </summary>
        /// <typeparam name="T">响应数据类型</typeparam>
        /// <param name="data">数据负载</param>
        /// <param name="message">响应消息</param>
        /// <returns>标准化 API 响应</returns>
        public static ApiResponse<T> Success<T>(T data, string message = "Success")
        {
            return new ApiResponse<T>(
                statusCode: (int)HttpStatusCode.OK,
                message: message,
                data: data
            );
        }

        /// <summary>
        /// 生成成功响应（无数据）
        /// </summary>
        /// <param name="message">响应消息</param>
        /// <returns>标准化 API 响应</returns>
        public static ApiResponse Success(string message = "Success")
        {
            return new ApiResponse(
                statusCode: (int)HttpStatusCode.OK,
                message: message,
                data: null
            );
        }

        /// <summary>
        /// 生成失败响应
        /// </summary>
        /// <typeparam name="T">响应数据类型</typeparam>
        /// <param name="statusCode">状态码</param>
        /// <param name="message">响应消息</param>
        /// <param name="data">数据负载</param>
        /// <returns>标准化 API 响应</returns>
        public static ApiResponse<T> Error<T>(HttpStatusCode statusCode, string message, T data = default)
        {
            return new ApiResponse<T>(
                statusCode: (int)statusCode,
                message: message,
                data: data
            );
        }

        /// <summary>
        /// 生成失败响应（无数据）
        /// </summary>
        /// <param name="statusCode">状态码</param>
        /// <param name="message">响应消息</param>
        /// <returns>标准化 API 响应</returns>
        public static ApiResponse Error(HttpStatusCode statusCode, string message)
        {
            return new ApiResponse(
                statusCode: (int)statusCode,
                message: message,
                data: null
            );
        }

        /// <summary>
        /// 生成 400 Bad Request 响应
        /// </summary>
        /// <typeparam name="T">响应数据类型</typeparam>
        /// <param name="message">响应消息</param>
        /// <param name="data">数据负载</param>
        /// <returns>标准化 API 响应</returns>
        public static ApiResponse<T> BadRequest<T>(string message = "Bad Request", T data = default)
        {
            return Error(HttpStatusCode.BadRequest, message, data);
        }

        /// <summary>
        /// 生成 401 Unauthorized 响应
        /// </summary>
        /// <typeparam name="T">响应数据类型</typeparam>
        /// <param name="message">响应消息</param>
        /// <param name="data">数据负载</param>
        /// <returns>标准化 API 响应</returns>
        public static ApiResponse<T> Unauthorized<T>(string message = "Unauthorized", T data = default)
        {
            return Error(HttpStatusCode.Unauthorized, message, data);
        }

        /// <summary>
        /// 生成 403 Forbidden 响应
        /// </summary>
        /// <typeparam name="T">响应数据类型</typeparam>
        /// <param name="message">响应消息</param>
        /// <param name="data">数据负载</param>
        /// <returns>标准化 API 响应</returns>
        public static ApiResponse<T> Forbidden<T>(string message = "Forbidden", T data = default)
        {
            return Error(HttpStatusCode.Forbidden, message, data);
        }

        /// <summary>
        /// 生成 404 Not Found 响应
        /// </summary>
        /// <typeparam name="T">响应数据类型</typeparam>
        /// <param name="message">响应消息</param>
        /// <param name="data">数据负载</param>
        /// <returns>标准化 API 响应</returns>
        public static ApiResponse<T> NotFound<T>(string message = "Not Found", T data = default)
        {
            return Error(HttpStatusCode.NotFound, message, data);
        }

        /// <summary>
        /// 生成 500 Internal Server Error 响应
        /// </summary>
        /// <typeparam name="T">响应数据类型</typeparam>
        /// <param name="message">响应消息</param>
        /// <param name="data">数据负载</param>
        /// <returns>标准化 API 响应</returns>
        public static ApiResponse<T> InternalServerError<T>(string message = "Internal Server Error", T data = default)
        {
            return Error(HttpStatusCode.InternalServerError, message, data);
        }
    }
}