using System;
using System.Collections.Generic;
using System.IO;
using System.Diagnostics;
using System.Security.Cryptography;
using KaduhServer;

namespace PatcherServer.FileCheck
{
    public class FileSecurity
    {
        public static byte[] Version = new byte[] { 1, 0, 0, 3 }; //Version
        public static string LogPath = "Log.txt";
        public static string DBName = "";

        public static TextWriter tWriter;
        public static string localPath = Path.GetDirectoryName(Process.GetCurrentProcess().MainModule.FileName);
        public static bool Running = true;
        public static Dictionary<string, byte[]> FileChecks = new Dictionary<string, byte[]>();
        public static HackServer Server;

        public static ushort HackPort = 9334;
        public static ushort TunnelPort = 9333;
        public static string ClientName = "";

    	public static void Start()
        {
            tWriter = new StreamWriter(localPath + "\\" + LogPath, true);
            LoadSettings("ShieldSettings.txt");
            LoadFileChecks();

            Log.WriteLine(ELogLevel.Info, "Lade {0} file checks.", FileChecks.Count);
            Listener lGameListener = new Listener(TunnelPort, 9010, "127.0.0.1");
            Server = new HackServer();
        }

        static void LoadSettings(string pPath)
        {
            if (!File.Exists(pPath))
            {
                Log.WriteLine(ELogLevel.Warn, "Einstellungen nicht gefunden.");
                return;
            }
            try
            {
                TextReader reader = new StreamReader(pPath);
                string output = "";
                while ((output = reader.ReadLine()) != null)
                {
                    string[] command = output.Split('=');
                    switch (command[0].ToLower())
                    {
                        case "db":
                            DBName = command[1];
                            break;
                        case "debug":
                            Log.isDebug = bool.Parse(command[1]);
                            break;
                        case "tunnelport":
                            TunnelPort = ushort.Parse(command[1]);
                            break;
                        case "hackport":
                            HackPort = ushort.Parse(command[1]);
                            break;
                        case "clientname":
                            ClientName = command[1];
                            break;
                        default:
                            Log.WriteLine(ELogLevel.Info, "Settings file weird formatting.");
                            break;
                    }
                }
                reader.Close();
            }
            catch (Exception ex) { Log.WriteLine(ELogLevel.Exception, "Settings error: {0}", ex.Message); }
        }

        static void LoadFileChecks()
        {
            if (!File.Exists(localPath + "\\FileCheck.txt"))
            {
                Log.WriteLine(ELogLevel.Error, "Cannot find FileCheck file.");
                return;
            }
            TextReader reader = new StreamReader(localPath + "\\FileCheck.txt");
            MD5 md5 = new MD5CryptoServiceProvider();
            string line = "";
            while ((line = reader.ReadLine()) != null)
            {
                if (line.Contains("#")) continue;
                string FilePath = localPath + "\\" + line;
                if (!File.Exists(FilePath))
                {
                    Log.WriteLine(ELogLevel.Warn, "File not found: {0}", line);
                    continue;
                }
                FileStream fStream = File.Open(FilePath, FileMode.Open);
                FileChecks.Add(line, md5.ComputeHash(fStream));
                fStream.Close();
            }
            reader.Close();
        }
    }
}