package fr.xephi.authme;

import java.io.File;
import java.io.FileWriter;
import java.util.Iterator;
import java.util.Random;
import java.util.Scanner;

import org.bukkit.Bukkit;
import org.bukkit.GameMode;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.entity.Player;

import fr.xephi.authme.api.API;
import fr.xephi.authme.cache.auth.PlayerCache;
import fr.xephi.authme.events.AuthMeTeleportEvent;
import fr.xephi.authme.settings.Settings;

public class Utils {
     private String currentGroup;
     private static Utils singleton;
     private String unLoggedGroup = Settings.getUnloggedinGroup;
     int id;

  public void setGroup(Player player, groupType group) {
    if (!player.isOnline())
        return;
    if(!Settings.isPermissionCheckEnabled)
        return;

        switch(group) {
            case UNREGISTERED: {
                currentGroup = AuthMe.permission.getPrimaryGroup(player);
                AuthMe.permission.playerRemoveGroup(player, currentGroup);
                AuthMe.permission.playerAddGroup(player, Settings.unRegisteredGroup);
                break;
            }
            case REGISTERED: {
                currentGroup = AuthMe.permission.getPrimaryGroup(player);
                AuthMe.permission.playerRemoveGroup(player, currentGroup);
                AuthMe.permission.playerAddGroup(player, Settings.getRegisteredGroup);
                break;
            }
        }
        return;
    }

    public String removeAll(Player player) {
        if(!Utils.getInstance().useGroupSystem()){
            return null;
        }
        if( !Settings.getJoinPermissions.isEmpty() ) {
            hasPermOnJoin(player);
        }
        this.currentGroup = AuthMe.permission.getPrimaryGroup(player.getWorld(),player.getName().toString());
        if(AuthMe.permission.playerRemoveGroup(player.getWorld(),player.getName().toString(), currentGroup) && AuthMe.permission.playerAddGroup(player.getWorld(),player.getName().toString(),this.unLoggedGroup)) {
            return currentGroup;
        }
        return null;
    }

    public boolean addNormal(Player player, String group) {
    	if(!Utils.getInstance().useGroupSystem()){
            return false;
        }
        if(AuthMe.permission.playerRemoveGroup(player.getWorld(),player.getName().toString(),this.unLoggedGroup) && AuthMe.permission.playerAddGroup(player.getWorld(),player.getName().toString(),group)) {
            return true;
        }
        return false;
    }

    private String hasPermOnJoin(Player player) {
    	Iterator<String> iter = Settings.getJoinPermissions.iterator();
    	while (iter.hasNext()) {
    		String permission = iter.next();
    		if(AuthMe.permission.playerHas(player, permission)){
    			AuthMe.permission.playerAddTransient(player, permission);
    		}
    	}
    	return null;
    }

    public boolean isUnrestricted(Player player) {
        if(Settings.getUnrestrictedName.isEmpty() || Settings.getUnrestrictedName == null)
            return false;
        if(Settings.getUnrestrictedName.contains(player.getName()))
            return true;
        return false;
    }

     public static Utils getInstance() {
    	 singleton = new Utils();
    	 return singleton;
    }

    private boolean useGroupSystem() {
        if(Settings.isPermissionCheckEnabled && !Settings.getUnloggedinGroup.isEmpty()) {
            return true;
        } return false;
    }

    public void packCoords(int x, int y, int z, String w, final Player pl)
    {
    	World theWorld;
    	if (w.equals("unavailableworld")) {
    		theWorld = pl.getWorld();
    	} else {
    		theWorld = Bukkit.getWorld(w);
    	}
    	if (theWorld == null)
			theWorld = pl.getWorld();
    	final World world = theWorld;
    	final int fY = y;
    	final Location locat = new Location(world, x, y + 0.4D, z);
    	final Location loc = locat.getBlock().getLocation();

    	Bukkit.getScheduler().scheduleSyncDelayedTask(AuthMe.getInstance(), new Runnable() {
			@Override
			public void run() {
		        AuthMeTeleportEvent tpEvent = new AuthMeTeleportEvent(pl, loc);
		        AuthMe.getInstance().getServer().getPluginManager().callEvent(tpEvent);
		        if(!tpEvent.isCancelled()) {
		        	if (!tpEvent.getTo().getChunk().isLoaded())
		        		tpEvent.getTo().getChunk().load();
		      	  pl.teleport(tpEvent.getTo());
		        }
			}
    	});

    	if (!PlayerCache.getInstance().isAuthenticated(pl.getName().toLowerCase())) {
        	id = Bukkit.getScheduler().scheduleSyncRepeatingTask(AuthMe.getInstance(), new Runnable()
        	{
        		@Override
        		public void run() {
        			if (!PlayerCache.getInstance().isAuthenticated(pl.getName().toLowerCase())) {
            			int current = (int)pl.getLocation().getY();
            			World currentWorld = pl.getWorld();
            			if (current != fY && world.getName() == currentWorld.getName()) {
            				pl.teleport(loc);
            			}
        			}
        		}
        	}, 1L, 20L);
        	Bukkit.getScheduler().scheduleSyncDelayedTask(AuthMe.getInstance(), new Runnable()
        	{
        		@Override
        		public void run() {
        			Bukkit.getScheduler().cancelTask(id);
        		}
          }, 60L);
    	}
      }

	/*
     * Random Token for passpartu
     * 
     */
    public boolean obtainToken() {
    	File file = new File("plugins/AuthMe/passpartu.token");
    	if (file.exists())
    		file.delete();

		FileWriter writer = null;
		try {
			file.createNewFile();
			writer = new FileWriter(file);
			String token = generateToken();
			writer.write(token + ":" + System.currentTimeMillis() / 1000 + API.newline);
			writer.flush();
			ConsoleLogger.info("[AuthMe] Security passpartu token: "+ token);
			writer.close();
			return true;
		} catch(Exception e) {
			e.printStackTrace();
		}
        return false;
    }

    /*
     * Read Token
     */
    public boolean readToken(String inputToken) {
        File file = new File("plugins/AuthMe/passpartu.token");

        if (!file.exists())
            return false;

        if (inputToken.isEmpty())
            return false;
		Scanner reader = null;
		try {
			reader = new Scanner(file);
			while (reader.hasNextLine()) {
				final String line = reader.nextLine();
				if (line.contains(":")) {
					String[] tokenInfo = line.split(":");
					if(tokenInfo[0].equals(inputToken) && System.currentTimeMillis()/1000-30 <= Integer.parseInt(tokenInfo[1]) ) {
						file.delete();
						reader.close();
						return true;
					}
				}
			}
		} catch(Exception e) {
			e.printStackTrace();
		}
		reader.close();
		return false;
    }

    /*
     * Generate Random Token
     */
    private String generateToken() {
    	// obtain new random token
    	Random rnd = new Random ();
    	char[] arr = new char[5];
    	for (int i=0; i<5; i++) {
    		int n = rnd.nextInt (36);
    		arr[i] = (char) (n < 10 ? '0'+n : 'a'+n-10);
    	}
    	return new String(arr);
	}

    /*
     * Used for force player GameMode
     */
    public static void forceGM(Player player) {
    	if (!AuthMe.getInstance().authmePermissible(player, "authme.bypassforcesurvival"))
    		player.setGameMode(GameMode.SURVIVAL);
    }

    public enum groupType {
        UNREGISTERED, REGISTERED, NOTLOGGEDIN, LOGGEDIN
    }

}