//Augment Module
var ITW = (function(itw){
    "use strict";
    //aliases
    var components, protot, _this, _super;
    itw.components = itw.components || Object.create(null);
    components = itw.components;

    var MAX_FISH = 6;

    //privates - initialize on constructor function
    var _skyContainer, _landContainer, _seabedContainer1, _seabedContainer2, _bgFishContainer;
    var _sky, _land, _underwater, _decomanager, _bgFishies, _seabed;

    components.Background = function(){
        this.super.call(this);
        _this = this;
        _super = _this.super;

        var _init = function(){
            // init stuff here
            var index = 0;

            _skyContainer = new EHDI.aka.Container();
            for( index = 0; index < 2; index++ ){
                var skyObj = new EHDI.aka.Sprite( EHDI.Assets.images[ "sky" ] );
                _skyContainer.addChild( skyObj );

                if( index === 1 ) skyObj.x = skyObj.width;
            }

            _landContainer = new EHDI.aka.Container();
            for( index = 0; index < 2; index++ ){
                var landObj = new EHDI.aka.Sprite( EHDI.Assets.images[ "terrain" ] );
                _landContainer.addChild( landObj );

                if( index === 1 ) landObj.x = landObj.width;
            }

            _underwater = new EHDI.aka.Sprite( EHDI.Assets.images[ "underwater" ] );
            _underwater.y = ITW.SceneMgr.getStageHeight() - _underwater.height;

            // _decomanager = new ITW.managers.UnderwaterDecoManager();

            _seabedContainer1 = new EHDI.aka.Container();
            for( index = 0; index < 2; index++ ){
                var seabedObj = new EHDI.aka.Sprite( EHDI.Assets.images[ "seabed1" ] );
                _seabedContainer1.addChild( seabedObj );

                if( index === 1 ) seabedObj.x = seabedObj.width;
            }
            _seabedContainer1.y = ITW.SceneMgr.getStageHeight() - _seabedContainer1.height;

            _seabedContainer2 = new EHDI.aka.Container();
            for( index = 0; index < 2; index++ ){
                var seabedObj = new EHDI.aka.Sprite( EHDI.Assets.images[ "seabed2" ] );
                _seabedContainer2.addChild( seabedObj );

                if( index === 1 ) seabedObj.x = seabedObj.width;
            }
            _seabedContainer2.y = ITW.SceneMgr.getStageHeight() - _seabedContainer2.height;

            if(!ITW.isIP4){
              _bgFishContainer = new EHDI.aka.Container();
              ITW.components.BGFish.setMaxHeight(ITW.SceneMgr.getStageHeight() * 0.34, _seabedContainer2.y - 40);
              _bgFishies = [];
              var type;
              for( index = 0; index < MAX_FISH; index++){
                type = index % 2;
                _bgFishies[index] = new ITW.components.BGFish(type+1);
                _bgFishContainer.addChild(_bgFishies[index])
              }
            }

            _seabed = new ITW.components.SeaBed();

            _this.addChild( _skyContainer );
            _this.addChild( _landContainer );
            _this.addChild( _underwater );
            if(_bgFishContainer)_this.addChild( _bgFishContainer );
            _this.addChild( _seabed );

            _landContainer.y = _underwater.y - _landContainer.height;
            _this.scale.x = 1.02;
        }
        _init();
    }

    protot = components.Background.prototype = Object.create(EHDI.aka.Container.prototype);
    protot.constructor = components.Background;
    protot.super = EHDI.aka.Container;

    protot.loop = function( dt ){
        if(!!ITW.GameMgr.getGameOver()) return;

        _skyContainer.x -= dt * ( ITW.GameMgr.getSpeed() * 0.15 );
        if( _skyContainer.x <= _skyContainer.width * -0.5 ) _skyContainer.x += _skyContainer.width * 0.5;

        _landContainer.x -= dt * ( ITW.GameMgr.getSpeed() * 0.6 );
        if( _landContainer.x <= _landContainer.width * -0.5 ) _landContainer.x += _landContainer.width * 0.5;

        if(_bgFishContainer) for(var i = 0, len = _bgFishies.length; i < len; i++) _bgFishies[i].loop( dt );

        _seabed.loop( dt );
    }

    protot.destroy = function(){
      if(_bgFishContainer){
        while(_bgFishies.length > 0){
          var spr = _bgFishies.pop();
          spr.destroy({children: true});
        }
      }
      _super.prototype.destroy.call(this, {children: true});
    }

    return itw;
}(ITW || Object.create(null)));