import java.io.*;
import java.security.*;

public class Listener extends PluginListener{


    PropertiesFile user_data;
    PropertiesFile MBLogin_Groups;

    public void onPlayerMove(Player player, Location from, Location to) {
        if (player.isInGroup("logged_out")){
            player.teleportTo(from);
        }
    }
    public boolean onBlockDestroy(Player player, Block block) {
        if (player.isInGroup("logged_out")){
            return true;
        }
        return false;
    }
    public boolean onBlockCreate(Player player, Block block) {
        if (player.isInGroup("logged_out")){
            return true;
        }
        return false;
    }

    public void register(Player player, String password) throws NoSuchAlgorithmException, UnsupportedEncodingException{

        if (user_data==null){
            user_data = new PropertiesFile("user_data.properties");
        }
        else {
            user_data.load();
        }
        if (!user_data.keyExists(player.getName())){
            String username = player.getName();
            String passwordMd5 = MD5(password);
            user_data.setString(username, passwordMd5);
            player.sendMessage(Colors.LightGreen+"Thankyou for registering. You can now use /login to login.");
        }
        else{
            player.sendMessage(Colors.Red+"You have already registered!");
        }

    }
    public void login(Player player, String password) throws NoSuchAlgorithmException, UnsupportedEncodingException{
        String username = player.getName();
        String passwordMd5 = MD5(password);

        if (user_data==null){
            user_data = new PropertiesFile("user_data.properties");
        }
        else {
            user_data.load();
        }
        if (MBLogin_Groups==null){
            MBLogin_Groups= new PropertiesFile("MBLogin_Groups.properties");
        }
        else {
            MBLogin_Groups.load();
        }
        if (user_data.keyExists(username)){
            String realPassword = user_data.getString(username);

            if(realPassword.equals(passwordMd5)){
                String group = MBLogin_Groups.getString(username);
                player.addGroup(group);
                player.sendMessage(Colors.Green+"Thankyou for logging on. Have fun.");
            }
            if(!realPassword.equals(passwordMd5)){
                player.kick(Colors.Red+"You entered the wrong password!");
            }
        }
        else{
            player.sendMessage(Colors.Red+"You have not registered!");
        }

    }
    private static String convertToHex(byte[] data) {
        StringBuffer buf = new StringBuffer();
        for (int i = 0; i < data.length; i++) {
            int halfbyte = (data[i] >>> 4) & 0x0F;
            int two_halfs = 0;
            do {
                if ((0 <= halfbyte) && (halfbyte <= 9))
                    buf.append((char) ('0' + halfbyte));
                else
                    buf.append((char) ('a' + (halfbyte - 10)));
                halfbyte = data[i] & 0x0F;
            } while(two_halfs++ < 1);
        }
        return buf.toString();
    }

    public static String MD5(String text)
    throws NoSuchAlgorithmException, UnsupportedEncodingException  {
        MessageDigest md;
        md = MessageDigest.getInstance("MD5");
        byte[] md5hash = new byte[32];
        md.update(text.getBytes("iso-8859-1"), 0, text.length());
        md5hash = md.digest();
        return convertToHex(md5hash);
    }


    public void onLogin(Player player){
        if (player.isInGroup("logged_out")){
            player.sendMessage("Welcome " + player.getName());
            player.sendMessage("Use /login <password> to start editing map");
            player.sendMessage("If you have not yet registered. Use /register <password>");
        }
        else {
            player.sendMessage("Welcome " + player.getName());
            player.sendMessage("You have to become a trusted user to start editing the map.");
            player.sendMessage("Please talk to one of the moderators or admins.");
        }


    }
    public void addUser(Player player, String group)
      {
        File users = new File("users.txt");
        try
        {
          FileWriter writer = new FileWriter(users, true);
          writer.write(player.getName() + ":logged_out" +
            System.getProperty("line.separator"));
          writer.flush();
          writer.close();
        }
        catch (IOException localIOException)
        {
        }
        if (MBLogin_Groups==null){
            MBLogin_Groups= new PropertiesFile("MBLogin_Groups.properties");
        }
        else {
            MBLogin_Groups.load();
        }
        MBLogin_Groups.setString(player.getName(), group);
      }

    public boolean onCommand(Player player, String[] split){
        if ((split[0].equalsIgnoreCase("/groups"))) {
            String[] groups = player.getGroups();
            int numberOfGroups = groups.length;
            player.sendMessage(Colors.LightBlue+"You are in "+numberOfGroups +" groups");
            int i = 0;
            while (i<numberOfGroups){
                player.sendMessage(Colors.LightBlue+groups[i]);
                i++;
            }
            return true;

        }
         if ((split[0].equalsIgnoreCase("/reg")) && (player.canUseCommand("/reg"))) {
                Player playerToWhitelist = etc.getServer().matchPlayer(split[1]);
                if (playerToWhitelist != null)
                {
                  playerToWhitelist.addGroup("logged_out");
                  addUser(playerToWhitelist, "logged_in");
                  player.sendMessage(Colors.Green+  playerToWhitelist.getName() + " was successfully added to the trusted users");
                  playerToWhitelist.sendMessage(Colors.Green+"You have been made a trusted user!");
                } else {
                  player.sendMessage("Player not found!");
                }return true;
              }
              if ((split[0].equalsIgnoreCase("/vip")) && (player.canUseCommand("/vip"))) {
                Player playerToWhitelist = etc.getServer().matchPlayer(split[1]);
                if (playerToWhitelist != null)
                {
                  playerToWhitelist.addGroup("vip");
                  addUser(playerToWhitelist, "vip");
                  player.sendMessage("§6" + playerToWhitelist.getName() + " was successfully added to the group 'vip'");
                  playerToWhitelist.sendMessage("§3You have been made a VIP!");
                } else {
                  player.sendMessage(Colors.Red+"Player not found!");
                }return true;
              }
        if(split[0].equalsIgnoreCase("/register")){
            if(split.length==1)
            {
                player.sendMessage(Colors.Red+"Usage: /register <password>");
            }
            if(split.length==2){
                    try {
                        register(player,split[1]);
                    } catch (NoSuchAlgorithmException e) {
                        player.sendMessage(Colors.Red+"Could not register your password. Please talk to ttocskcaj Error: 00001");
                    } catch (UnsupportedEncodingException e) {
                        player.sendMessage(Colors.Red+"Could not register your password. Please talk to ttocskcaj Error: 00002");
                    }

            }
            return true;
        }
        if(split[0].equalsIgnoreCase("/login")){
            if(split.length==1)
            {
                player.sendMessage("Usage: /login <password>");
            }
            if(split.length==2){
                    try {
                        login(player,split[1]);
                    } catch (NoSuchAlgorithmException e) {
                        player.sendMessage(Colors.Red+"Could not login. Please talk to ttocskcaj Error: 00003");
                    } catch (UnsupportedEncodingException e) {
                        player.sendMessage(Colors.Red+"Could not login. Please talk to ttocskcaj Error: 00004");
                    }

            }


            return true;
        }
        return false;
    }


}