using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using RestSharp;

namespace YuanXuan.IM.Common.Helpers
{
    /// <summary>
    /// RestSharpHelper
    /// </summary>
    public class RestSharpHelper
    {

        private readonly RestClient _client;

        /// <summary>
        /// 构造函数，初始化 RestClient
        /// </summary>
        public RestSharpHelper()
        {
            _client = new RestClient();
        }

        /// <summary>
        /// 发送 GET 请求
        /// </summary>
        /// <param name="url">完整的请求 URL</param>
        /// <param name="headers">请求头</param>
        /// <returns>响应数据</returns>
        public async Task<string> GetAsync(string url, Dictionary<string, string>? headers = null)
        {
            var request = new RestRequest(url, Method.Get);
            AddHeaders(request, headers);

            var response = await _client.ExecuteAsync(request);
            return HandleResponse(response);
        }

        /// <summary>
        /// 发送 POST 请求
        /// </summary>
        /// <param name="url">完整的请求 URL</param>
        /// <param name="body">请求体</param>
        /// <param name="headers">请求头</param>
        /// <returns>响应数据</returns>
        public async Task<string> PostAsync(string url, object body, Dictionary<string, string>? headers = null)
        {
            var request = new RestRequest(url, Method.Post);
            AddHeaders(request, headers);
            request.AddBody(body);

            var response = await _client.ExecuteAsync(request);
            return HandleResponse(response);
        }

        /// <summary>
        /// 发送 POST 请求
        /// </summary>
        /// <param name="url">完整的请求 URL</param>
        /// <param name="body">请求体</param>
        /// <param name="headers">请求头</param>
        /// <returns>响应数据</returns>
        public async Task<string> PostByJsonBodyAsync(string url, object body, Dictionary<string, string>? headers = null)
        {
            var request = new RestRequest(url, Method.Post);
            AddHeaders(request, headers);
            request.AddJsonBody(body);

            var response = await _client.ExecuteAsync(request);
            return HandleResponse(response);
        }

        /// <summary>
        /// 发送 PUT 请求
        /// </summary>
        /// <param name="url">完整的请求 URL</param>
        /// <param name="body">请求体</param>
        /// <param name="headers">请求头</param>
        /// <returns>响应数据</returns>
        public async Task<string> PutAsync(string url, object body, Dictionary<string, string>? headers = null)
        {
            var request = new RestRequest(url, Method.Put);
            AddHeaders(request, headers);
            request.AddJsonBody(body);

            var response = await _client.ExecuteAsync(request);
            return HandleResponse(response);
        }

        /// <summary>
        /// 添加请求头
        /// </summary>
        /// <param name="request">RestSharp 请求对象</param>
        /// <param name="headers">请求头</param>
        private void AddHeaders(RestRequest request, Dictionary<string, string>? headers)
        {
            if (headers != null)
            {
                foreach (var header in headers)
                {
                    request.AddHeader(header.Key, header.Value);
                }
            }
        }

        /// <summary>
        /// 处理响应
        /// </summary>
        /// <param name="response">RestSharp 响应对象</param>
        /// <returns>响应数据</returns>
        /// <exception cref="Exception">当响应失败时抛出异常</exception>
        private string HandleResponse(RestResponse response)
        {
            if (response.IsSuccessful && response.Content != null)
            {
                return response.Content;
            }

            throw new Exception($"请求失败: {response.StatusCode}, 错误信息: {response.ErrorMessage ?? response.Content}");
        }
    }
}