public class BT2ArenaManager {

    //save where the player teleported
    public Map<String, Location> locs = new HashMap<String, Location>();
    //make a new instance of the class
    public static BT2ArenaManager am = new BT2ArenaManager();
    //a few other fields
    Map<String, ItemStack[]> inv = new HashMap<String, ItemStack[]>();
    Map<String, ItemStack[]> armor = new HashMap<String, ItemStack[]>();
    //list of BT2Arenas
    List<BT2Arena> BT2Arenas = new ArrayList<BT2Arena>();
    int BT2ArenaSize = 0; // <--- that is how the arenas get their id's

    GameMode g = null;

    //Stuff to add to inventory for minigame
    ItemStack bow = new ItemStack(Material.BOW, 1);
    ItemStack arrow = new ItemStack(Material.ARROW, 1);

    static BowThrow2 plugin;
    public BT2ArenaManager(BowThrow2 bowThrow2) {
        plugin = bowThrow2;
    }

    public BT2ArenaManager(){

    }

    //we want to get an instance of the manager to work with it statically
    public static BT2ArenaManager getManager(){
        return am;
    }

    //get an BT2Arena object from the list
    public BT2Arena getBT2Arena(int i){
        for(BT2Arena a : BT2Arenas){
            if(a.getId() == i){
                return a;
            }
        }
        return null;
    }

    //add players to the BT2Arena, save their inventory
    public void addPlayer(Player p, int i){
        BT2Arena a = getBT2Arena(i);//get the BT2Arena you want to join
        if(a == null){//make sure it is not null
            p.sendMessage(ChatColor.RED + "Arena is null (probably doesn't exist)!");
            return;
        }

        a.getPlayers().add(p.getName());//add them to the BT2Arena list of players
        inv.put(p.getName(), p.getInventory().getContents());//save inventory
        armor.put(p.getName(), p.getInventory().getArmorContents());

        p.getInventory().setArmorContents(null);
        p.getInventory().clear();
        p.getInventory().addItem(bow);
        p.getInventory().addItem(arrow);
        g = p.getGameMode();
        p.setGameMode(GameMode.SURVIVAL);

        BT2GameListener.addPlayer(p);

        locs.put(p.getName(), p.getLocation());

        p.teleport(a.spawn);

        p.sendMessage(ChatColor.GREEN + "You joined Arena " + a.id);
    }

    //remove players
    public void removePlayer(Player p){
        BT2Arena a = null;//make an BT2Arena
        for(BT2Arena BT2Arena : BT2Arenas){
            if(BT2Arena.getPlayers().contains(p.getName())){
                a = BT2Arena;//if the BT2Arena has the player, the BT2Arena field would be the BT2Arena containing the player
            }
            //if none is found, the BT2Arena will be null
        }
        if(a == null || !a.getPlayers().contains(p.getName())){//make sure it is not null
            p.sendMessage("Invalid operation!");
            return;
        }

        a.getPlayers().remove(p.getName());//remove from BT2Arena

        p.getInventory().clear();
        p.getInventory().setArmorContents(null);

        p.getInventory().setContents(inv.get(p.getName()));//restore inventory
        p.getInventory().setArmorContents(armor.get(p.getName()));

        inv.remove(p.getName());//remove entries from hashmaps
        armor.remove(p.getName());
        p.teleport(locs.get(p.getName()));
        locs.remove(p.getName());
        p.setGameMode(g);

        p.setFireTicks(0);
    }

    //create BT2Arena
    public BT2Arena createBT2Arena(Location l){
        int num = BT2ArenaSize + 1;
        BT2ArenaSize++;

        BT2Arena a = new BT2Arena(l, num);
        BT2Arenas.add(a);

        plugin.getConfig().set("BT2Arenas." + num, serializeLoc(l));
        List<Integer> list = plugin.getConfig().getIntegerList("BT2Arenas.BT2Arenas");
        list.add(num);
        plugin.getConfig().set("BT2Arenas.BT2Arenas", list);
        plugin.saveConfig();

        return a;
    }

    public BT2Arena reloadBT2Arena(Location l) {
        int num = BT2ArenaSize + 1;
        BT2ArenaSize++;

        BT2Arena a = new BT2Arena(l, num);
        BT2Arenas.add(a);

        return a;
    }

    public void removeBT2Arena(int i) {
        BT2Arena a = getBT2Arena(i);

        if(a == null) {
            return;
        }

        BT2Arenas.remove(a);
        BT2ArenaSize--;

        if (BT2ArenaSize == -1) {
        	BT2ArenaSize = 0;
        }


        plugin.getConfig().set("BT2Arenas." + i, null);
        List<Integer> list = plugin.getConfig().getIntegerList("BT2Arenas.BT2Arenas");
        list.remove(a);
        plugin.getConfig().set("BT2Arenas.BT2Arenas", list);
        plugin.saveConfig();
    }

    public boolean isInGame(Player p){
        for(BT2Arena a : BT2Arenas){
            if(a.getPlayers().contains(p.getName()))
                return true;
        }
        return false;
    }

    public void loadGames(){
        BT2ArenaSize = 0;

        if(plugin.getConfig().getIntegerList("BT2Arenas.BT2Arenas").isEmpty()){
            return;
        }

        for(int i : plugin.getConfig().getIntegerList("BT2Arenas.BT2Arenas")){
            BT2Arena a = reloadBT2Arena(deserializeLoc(plugin.getConfig().getString("BT2Arenas." + i)));
            a.id = i;
        }
    }

    public String serializeLoc(Location l){
        return l.getWorld().getName()+","+l.getBlockX()+","+l.getBlockY()+","+l.getBlockZ();
    }
    public Location deserializeLoc(String s){
        String[] st = s.split(",");
        return new Location(Bukkit.getWorld(st[0]), Integer.parseInt(st[1]), Integer.parseInt(st[2]), Integer.parseInt(st[3]));
    }