using SimpleWebServer;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading;
using System.Threading.Tasks;

namespace ServerControl
{
   class Program
    {
        static void Main(string[] args)
        {
            WebServer ws = new WebServer("http://*:8080/");
            ws.AddPage("/", rootPage);
            ws.AddPage("/list", list);
            ws.AddPage("/set", set);
            ws.AddPage("/skip", skipCurrent);
            ws.AddPage("/current", getCurrent);
            ws.Run();
            Console.WriteLine("A simple webserver. Press a key to quit.");
            while (true)
            {
                Thread.Sleep(1000);
            }
            ws.Stop();
        }

        public static string rootPage(HttpListenerRequest request) {
            return File.ReadAllText("index.html");
        }

        public static string list(HttpListenerRequest request)
        {
            return executeProcess("find ./content/music/* | sort -V | grep mp4");
        }

        public static string set(HttpListenerRequest request)
        {
            var p = request.QueryString["number"];
            if (p != null && p.All(Char.IsDigit) && p.Length<5) {
                File.WriteAllText("counter.cfg", p);
            }
            executeProcess("killall ffmpeg_stream");
            return "done";
        }

        private static string skipCurrent(HttpListenerRequest request)
        {
            return executeProcess("killall ffmpeg_stream");
        }

        private static string getCurrent(HttpListenerRequest request)
        {
            return File.ReadAllText("counter.cfg");
        }


        private static string executeProcess(string proc)
        {
            Process process = new Process();
            var startInfo = new ProcessStartInfo
            {
                FileName = "/bin/bash",
                Arguments = $"-c \"{proc}\""
            };
            startInfo.UseShellExecute = false;
            startInfo.RedirectStandardOutput = true;
            process.StartInfo = startInfo;
            process.Start();
            string output = process.StandardOutput.ReadToEnd();
            return output;
        }
    }
}