var canvas = {};

var game = {

  //Current level played
  gameLevel : 0,

  enemies : [],
  enemiesToCome : 1,
  secondsBetweenEnemies : 0,
  timeLastEnemy : Math.round(new Date().getTime() / 1000),

  timeLastFrame : Math.round(new Date().getTime() / 1000),

  tileSize : 32,

  init : function () {
    this.canvasDOMelm = document.getElementById('gameCanvas');
    canvas = new CanvasTools(this.canvasDOMelm.getContext('2d'), this.canvasDOMelm.width, this.canvasDOMelm.height);

    this.start();
  },

  start : function () {
    this.map = maps[this.gameLevel].map;
    this.mapParser = new MapParser(this.gameLevel, this.tileSize);
    this.mapParser.doParse();

    this.loop();
  },

  loop : function () {
    if(!this.gameOver) {
      this.update();
      this.draw();

      window.setTimeout('game.loop()', 10);
    }
  },

  update : function () {
    var time = Math.round(new Date().getTime() / 1000);
    var secondsSinceLastEnemy = time-this.timeLastEnemy;
    //If we need to set in a new enemy
    if(this.enemiesToCome>0 && secondsSinceLastEnemy>=this.secondsBetweenEnemies) {
      var enemy = new Enemy();
      enemy.init(this.mapParser.getPathPositions(), this.mapParser.getStartPosition(), 2, 10);
      this.enemies.push(enemy);
      this.enemiesToCome--;
      this.timeLastEnemy = time;
    }

    for(var i in this.enemies) {
      this.enemies[i].update();
    }

    this.timeLastFrame = time;
  },

  draw : function () {
    canvas.clear();
    this.drawMap();
    for(var i in this.enemies) {
      this.enemies[i].draw();
    }
  },

  drawMap : function () {

    //Draw start position
    var start = this.mapParser.getStartCell();
    canvas.fillStyle("green");
    canvas.rect(
      start[0]*this.tileSize,
      start[1]*this.tileSize,
      this.tileSize,
      this.tileSize
    );

    //Drawing path
    var path = this.mapParser.getPathCells();
    canvas.fillStyle("black");
    for(var i in path) {
      canvas.rect(
        path[i][0]*this.tileSize,
        path[i][1]*this.tileSize,
        this.tileSize,
        this.tileSize
      );
    }
    //Draw end position
    var end = this.mapParser.getEndCell();
    canvas.fillStyle("red");
    canvas.rect(
      end[0]*this.tileSize,
      end[1]*this.tileSize,
      this.tileSize,
      this.tileSize
    );
  }
}

window.onload = function () {
  game.init();
}