using System.IO;
using System.Net;
using System.Text;

namespace Ramitta.lib
{
    public static class HttpHelper
    {
        // 异步发送HTTP GET请求
        public static async Task<string> SendHttpGetAsync(string url, int timeout = 10000)
        {
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "GET";
                request.Timeout = timeout;
                request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36";

                using (HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync())
                using (Stream stream = response.GetResponseStream())
                using (StreamReader reader = new StreamReader(stream, Encoding.UTF8))
                {
                    return await reader.ReadToEndAsync();
                }
            }
            catch (Exception ex)
            {
                throw new Exception($"GET请求失败: {ex.Message}");
            }
        }

        public static async Task<string> SendHttpPostAsync(string url, string jsonData, int timeout = 10000)
        {
            try
            {
                HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
                request.Method = "POST";
                request.Timeout = timeout;
                request.ContentType = "application/json";
                request.UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36";

                byte[] data = Encoding.UTF8.GetBytes(jsonData);
                request.ContentLength = data.Length;

                using (Stream requestStream = await request.GetRequestStreamAsync())
                {
                    await requestStream.WriteAsync(data, 0, data.Length);
                }

                using (HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync())
                using (Stream responseStream = response.GetResponseStream())
                using (StreamReader reader = new StreamReader(responseStream, Encoding.UTF8))
                {
                    return await reader.ReadToEndAsync();
                }
            }
            catch (WebException ex)
            {
                WebResponse errorResponse = ex.Response;
                if (errorResponse is HttpWebResponse httpErrorResponse)
                {
                    using (Stream errorStream = httpErrorResponse.GetResponseStream())
                    using (StreamReader errorReader = new StreamReader(errorStream, Encoding.UTF8))
                    {
                        string errorContent = await errorReader.ReadToEndAsync();
                        throw new Exception($"HTTP错误 {(int)httpErrorResponse.StatusCode} ({httpErrorResponse.StatusCode}): {errorContent}");
                    }
                }
                throw new Exception("网络错误: " + ex.Message);
            }
            catch (Exception ex)
            {
                throw new Exception("POST请求失败: " + ex.Message);
            }
        }
    }
}