using DaJiaoYan.Utils;
using System.Net;
using System.Text.RegularExpressions;
using System.Threading;

namespace DaJiaoYan.Services
{
    internal class Instance
    {
        public static void Run()
        {
            Functions.UUIDBackgroundFunc();
            FileExts.CheckDirectory(Variables.Const.TMP_PATH, true);
            InitHttpServer();
        }


        public static void InitHttpServer()
        {

            AsyncHttpServer httpServer = new AsyncHttpServer(Variables.Const.TMP_PATH);

            httpServer.RegisterMiddleware((HttpListenerRequest request, HttpListenerResponse response) =>
            {
                // cors middleware
                string origin = request.Headers.Get("origin");
                //string referer = request.Headers.Get("referer");

                if (!string.IsNullOrEmpty(origin))
                {
                    var m = Regex.Match(origin, @"(https?:\/\/([^/]*\.dajiaoyan.com|dajiaoyan.com))", RegexOptions.IgnoreCase);
                    if (m.Success)
                    {
                        response.Headers.Add("Access-Control-Allow-Credentials", "true");
                        response.Headers.Add("Access-Control-Allow-Origin", origin);
                    }
                }
                return true;
            });

            httpServer.RegisterMiddleware((HttpListenerRequest request, HttpListenerResponse response) =>
            {
                // options middleware
                response.StatusCode = 200;
                if (string.Equals(request.HttpMethod, "OPTIONS", System.StringComparison.OrdinalIgnoreCase))
                {
                    response.Headers.Add("Access-Control-Allow-Methods", "GET, POST, PATCH, OPTIONS, PUT, DELETE");
                    response.Headers.Add("Access-Control-Allow-Headers", "AppName,AppVersion,Authorization,Platform");
                    return false;
                }
                return true;
            });

            httpServer.RegisterPrefix("/ping", new PingHandler(httpServer));
            httpServer.RegisterPrefix("/scanners", new ScannerHandler(httpServer));
            httpServer.RegisterPrefix("/scan", new ScanHandler(httpServer));
            httpServer.RegisterPrefix("/upload", new UploadHandler(httpServer));
            new Thread(State => { _ = httpServer.StartAsync(); })
            {
                IsBackground = true
            }.Start();
        }
    }
}