using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;
using static FaceSdkX64Service.TH_Faces;

namespace FaceSdkX64Service
{
    public class HttpServer
    {
        private string ImgPath = string.Empty;

        HttpListener listener;

        public HttpServer(int port, string imgPath)
        {
            ImgPath = imgPath;

            listener = new HttpListener();
            listener.Prefixes.Add($"http://+:{port}/");
            listener.Start();

            HttpListenerContext httpListenerContext = listener.GetContext();

            GetConnect(httpListenerContext);

            listener.Stop(); //关闭HttpListener
        }

        private void GetConnect(HttpListenerContext context)
        {
            try
            {
                // 等待客户端连接
                if (!context.Request.IsWebSocketRequest)
                {
                    if (context == null) return;
                    var request = context.Request;
                    var response = context.Response;

                    response.StatusCode = 200;
                    response.ContentType = "text/plain; charset=utf-8";
                    response.Headers.Add("Access-Control-Allow-Origin", "*"); // 允许跨域访问

                    using (var stream = response.OutputStream)
                    {

                        // 把处理信息返回到客户端
                        if (string.IsNullOrEmpty(ImgPath))
                        {
                            stream.Write(new byte[0], 0, 0);
                        }
                        else
                        {
                            string base64 = ImageToBase64(ImgPath); // 将图片转换为Base64字符串
                            byte[] buffer = Encoding.UTF8.GetBytes(base64);
                            stream.Write(buffer, 0, buffer.Length);
                        }

                    }

                }

            }
            catch (Exception ex)
            {
            }

        }

        private string ImageToBase64(string imagePath)
        {
            try
            {
                byte[] imageBytes = System.IO.File.ReadAllBytes(imagePath);
                return Convert.ToBase64String(imageBytes);
            }
            catch (Exception ex)
            {
                return string.Empty;
            }
        }
    }
}