using HttpServer.App;
using System;
using System.Net;
using System.Text;
using System.Threading;
using System.Web;

namespace HttpServer
{
    internal static class HttpProgram
    {
        private static bool _isRunning;

        private static void Main(string[] args)
        {
            Console.WriteLine("Starting...");

            var tWorker = new Thread(Working);
            _isRunning = true;
            tWorker.Start();

            Console.WriteLine("Press ENTER to Stop.");
            Console.ReadLine();

            Console.Write("Shutting down...");
            _isRunning = false;
            tWorker.Join();

            Console.Write("Stopped.");

            Console.WriteLine();
            Console.Write("Press ENTER to Exit.");
            Console.ReadLine();
        }

        private static void Working()
        {
            var listener = new HttpListener();
            listener.Prefixes.Add(Properties.Settings.Default.ListenPrefix);
            listener.Start();

            var upTime = DateTime.Now;

            Console.WriteLine($"HTTP Server started, listening on {Properties.Settings.Default.ListenPrefix}");

            var task = listener.GetContextAsync();

            var polling = DateTime.Now;
            var polled = false;
            while (_isRunning)
            {
                Console.CursorLeft = 0;
                if (false == task.Wait(500))
                {
                    var timeSpan = DateTime.Now - polling;
                    var up = DateTime.Now - upTime;
                    Console.Write("Polling request..." +
                                  $" {timeSpan.Days:00}D {timeSpan.Hours:00}H {timeSpan.Minutes:00}M {timeSpan.Seconds:00}S {timeSpan.Milliseconds:000}" +
                                  $" / UP {up.Days:00}D {up.Hours:00}H {up.Minutes:00}M {up.Seconds:00}S {up.Milliseconds:000}");

                    polled = true;
                }
                else // polled
                {
                    polling = DateTime.Now;
                    if (polled)
                    {
                        Console.WriteLine();
                        polled = false;
                    }

                    var context = task.Result;
                    task = listener.GetContextAsync();

                    var request = context.Request;
                    Console.WriteLine($"Request from {request.RemoteEndPoint} {request.HttpMethod} {request.RawUrl}");

                    var requestPath = request.Url.LocalPath.ToLower();

                    try
                    {
                        if (requestPath == "/boot/ipxe")
                        {
                            Console.WriteLine(" Send init script");
                            var buffer =
                                Encoding.ASCII.GetBytes(
                                    IpxeScriptManager.GetInitScript(Properties.Settings.Default.ListenPrefix));
                            context.Response.OutputStream.Write(buffer, 0, buffer.Length);
                        }
                        else if (requestPath == "/boot/ipxe/script")
                        {
                            var queryString = HttpUtility.ParseQueryString(request.Url.Query);
                            var mac = queryString["mac"].ToUpper();

                            Console.WriteLine($" MAC:{mac}, send boot script");

                            var buffer = Encoding.ASCII.GetBytes(IpxeScriptManager.GetScript(mac));
                            context.Response.OutputStream.Write(buffer, 0, buffer.Length);
                        }
                        else
                        {
                            context.Response.StatusCode = 404;
                        }
                    }
                    catch (Exception e)
                    {
                        Console.WriteLine(e);
                    }
                    finally
                    {
                        context.Response.Close();
                    }
                }
            }

            listener.Close();
        }
    }
}