var EventEmitter = require('events').EventEmitter;
var util = require('util');

/**
 *
 * @constructor
 */
var Board = function() {
    this.cups = [];
    this.players = [];
    this.currentTurn = 0;
    this.ready = false;

    this.init();
};

Board.events = {
    PLAYER_CONNECTED: 'playerConnected',
    GAME_READY: 'gameReady',
    CUP_MARKED: 'cupMarked',
    CHANGE_TURN: 'changeTurn',
    WINNER: 'winner'
};

util.inherits(Board, EventEmitter);

/**
 *
 */
Board.prototype.init = function() {
    for (var i = 0; i <= 9; i++) {
        this.cups.push({});
    }
};

Board.prototype.disableAll = function() {
    this.cups.forEach(function(cup) {
        cup.active = false;
    });
};

Board.prototype.enableAll = function() {
    this.cups.forEach(function(cup) {
        cup.active = true;
    });
};

/**
 *
 * @param cupId
 */
Board.prototype.mark = function(cupId) {
    var cup = this.cups[cupId];

    if (!cup) {
        return false;
    }

    if (this.ready && cup.active) {
        var player = this.players[this.currentTurn];
        cup.value = player.label;
        cup.active = false;

        this.emit(Board.events.CUP_MARKED, {cupId: cupId, player: player});

        var res = this.checkWinner();
        if (res.win) {
            this.disableAll();
            this.emit(Board.events.WINNER, {player: this.players[this.currentTurn]});
        } else {
            this.currentTurn = (this.currentTurn + 1) % 2;
            this.emit(Board.events.CHANGE_TURN, this.players[this.currentTurn]);
        }
    }
};

/**
 *
 * @param playerId
 * @returns {boolean}
 */
Board.prototype.checkTurn = function(playerId) {
    return this.players[this.currentTurn].id == playerId;
};

/**
 *
 * @returns {{win: boolean, pos: Array}}
 */
 Board.prototype.checkWinner = function() {
   var win = false;
   var counter=0;

   this.cups.forEach(function(cup) {
     if(cup.active == false) {
       counter++;
     }
   });

   if(counter == 10) {
     win = true;
   }



 /*
     var winPosition = [
         [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
     ];

     var player = this.players[this.currentTurn];
     var pos = [];

     var win = winPosition.some(function(win) {
         if (this.cups[win[0]].textContent === player.label) {
             var res = this.cups[win[0]].textContent === this.cups[win[1]].textContent && this.cups[win[1]].textContent === this.cups[win[2]].textContent;

             if (res) {
                 pos = win;
                 return true;
             }
}

         return false;
     }, this);*/

     return {
         win: win
     };

 };



/**
 *
 * @param player
 */
Board.prototype.addPlayer = function(player) {
    if (this.players.length < 2) {
        var isNew = this.players.filter(function(p) {
            return p.id == player.id;
        }).length === 0;

        if (isNew) {
            this.players.push(player);
            this.ready = this.players.length === 2;
            this.emit(Board.events.PLAYER_CONNECTED, player);

            if (this.ready) {
                this.enableAll();
                this.emit(Board.events.GAME_READY, this.players[0]);
            }
        }
    }
};

module.exports = Board;