var PageTransitions = (function() {

	var $main = $( '#pt-main' ),
		$pages = $main.children( 'div.pt-page' ),
		$iterate = $( '#iterateEffects' ),
		animcursor = 1,
		pagesCount = $pages.length,
		current = 0,
		isAnimating = false,
		endCurrPage = false,
		endNextPage = false,
		animEndEventNames = {
			'WebkitAnimation' : 'webkitAnimationEnd',
			'OAnimation' : 'oAnimationEnd',
			'msAnimation' : 'MSAnimationEnd',
			'animation' : 'animationend'
		},
		// animation end event name
		animEndEventName = animEndEventNames[ Modernizr.prefixed( 'animation' ) ],
		// support css animations
		support = Modernizr.cssanimations,
        animations = {
            max: 67
        },
        keys = {
            BACKSPACE: 8,
            DOWN: 40,
            ENTER: 13,
            LEFT: 37,
            RIGHT: 39,
            SPACE: 32,
            PAGE_DOWN: 34,
            PAGE_UP: 33
        };

	function init() {

		$pages.each( function() {
			var $page = $( this );
			$page.data( 'originalClassList', $page.attr( 'class' ) );
		} );

		$pages.eq( current ).addClass( 'pt-page-current' );

		$( '#dl-menu' ).dlmenu( {
			animationClasses : { in : 'dl-animate-in-2', out : 'dl-animate-out-2' },
			onLinkClick : function( el, ev ) {
				ev.preventDefault();
				nextPage( el.data( 'animation' ) );
			}
		} );

        var animcursorCheck = function() {
            if( isAnimating ) {
                return false;
            }
            if( animcursor > animations.max ) {
                animcursor = 1;
            }
            else if (animcursor < 1) {
                animcursor = animations.max
            }
            return animcursor;
        };

        $( "body" ).keyup(function(event) {
            var key = event.which,
                animation = $( '#dl-menu' ).data().dlmenu.$el.data( 'animation' );

            if ( key == keys.RIGHT || key == keys.SPACE || key == keys.ENTER || key == keys.DOWN || key == keys.PAGE_DOWN ) {
                nextPage( animcursorCheck() );
                ++animcursor;
            }
            if ( key == keys.LEFT || key == keys.BACKSPACE || key == keys.PAGE_UP ) {
                --animcursor;
                nextPage( animcursorCheck() );
            }
        });

        $iterate.on( 'click', function() {
            nextPage( animcursorCheck() );
            ++animcursor;
        } );

	}

	function nextPage(options ) {
		var animation = (options.animation) ? options.animation : options;

		if( isAnimating ) {
			return false;
		}

		isAnimating = true;

		var $currPage = $pages.eq( current );

		if(typeof options.showPage != 'undefined'){
			if( options.showPage < pagesCount - 1 ) {
				current = options.showPage;
			}
			else {
				current = 0;
			}
		}
		else{
			if( current < pagesCount - 1 ) {
				++current;
			}
			else {
				current = 0;
			}
		}

		var $nextPage = $pages.eq( current ).addClass( 'pt-page-current' ),
			outClass = '', inClass = '';

		switch( animation ) {

			case 1:
				outClass = 'pt-page-moveToLeft';
				inClass = 'pt-page-moveFromRight';
				break;
			case 2:
				outClass = 'pt-page-moveToRight';
				inClass = 'pt-page-moveFromLeft';
				break;
			case 3:
				outClass = 'pt-page-moveToTop';
				inClass = 'pt-page-moveFromBottom';
				break;
			case 4:
				outClass = 'pt-page-moveToBottom';
				inClass = 'pt-page-moveFromTop';
				break;
			case 5:
				outClass = 'pt-page-fade';
				inClass = 'pt-page-moveFromRight pt-page-ontop';
				break;
			case 6:
				outClass = 'pt-page-fade';
				inClass = 'pt-page-moveFromLeft pt-page-ontop';
				break;
			case 7:
				outClass = 'pt-page-fade';
				inClass = 'pt-page-moveFromBottom pt-page-ontop';
				break;
			case 8:
				outClass = 'pt-page-fade';
				inClass = 'pt-page-moveFromTop pt-page-ontop';
				break;
			case 9:
				outClass = 'pt-page-moveToLeftFade';
				inClass = 'pt-page-moveFromRightFade';
				break;
			case 10:
				outClass = 'pt-page-moveToRightFade';
				inClass = 'pt-page-moveFromLeftFade';
				break;
			case 11:
				outClass = 'pt-page-moveToTopFade';
				inClass = 'pt-page-moveFromBottomFade';
				break;
			case 12:
				outClass = 'pt-page-moveToBottomFade';
				inClass = 'pt-page-moveFromTopFade';
				break;
			case 13:
				outClass = 'pt-page-moveToLeftEasing pt-page-ontop';
				inClass = 'pt-page-moveFromRight';
				break;
			case 14:
				outClass = 'pt-page-moveToRightEasing pt-page-ontop';
				inClass = 'pt-page-moveFromLeft';
				break;
			case 15:
				outClass = 'pt-page-moveToTopEasing pt-page-ontop';
				inClass = 'pt-page-moveFromBottom';
				break;
			case 16:
				outClass = 'pt-page-moveToBottomEasing pt-page-ontop';
				inClass = 'pt-page-moveFromTop';
				break;
			case 17:
				outClass = 'pt-page-scaleDown';
				inClass = 'pt-page-moveFromRight pt-page-ontop';
				break;
			case 18:
				outClass = 'pt-page-scaleDown';
				inClass = 'pt-page-moveFromLeft pt-page-ontop';
				break;
			case 19:
				outClass = 'pt-page-scaleDown';
				inClass = 'pt-page-moveFromBottom pt-page-ontop';
				break;
			case 20:
				outClass = 'pt-page-scaleDown';
				inClass = 'pt-page-moveFromTop pt-page-ontop';
				break;
			case 21:
				outClass = 'pt-page-scaleDown';
				inClass = 'pt-page-scaleUpDown pt-page-delay300';
				break;
			case 22:
				outClass = 'pt-page-scaleDownUp';
				inClass = 'pt-page-scaleUp pt-page-delay300';
				break;
			case 23:
				outClass = 'pt-page-moveToLeft pt-page-ontop';
				inClass = 'pt-page-scaleUp';
				break;
			case 24:
				outClass = 'pt-page-moveToRight pt-page-ontop';
				inClass = 'pt-page-scaleUp';
				break;
			case 25:
				outClass = 'pt-page-moveToTop pt-page-ontop';
				inClass = 'pt-page-scaleUp';
				break;
			case 26:
				outClass = 'pt-page-moveToBottom pt-page-ontop';
				inClass = 'pt-page-scaleUp';
				break;
			case 27:
				outClass = 'pt-page-scaleDownCenter';
				inClass = 'pt-page-scaleUpCenter pt-page-delay400';
				break;
			case 28:
				outClass = 'pt-page-rotateRightSideFirst';
				inClass = 'pt-page-moveFromRight pt-page-delay200 pt-page-ontop';
				break;
			case 29:
				outClass = 'pt-page-rotateLeftSideFirst';
				inClass = 'pt-page-moveFromLeft pt-page-delay200 pt-page-ontop';
				break;
			case 30:
				outClass = 'pt-page-rotateTopSideFirst';
				inClass = 'pt-page-moveFromTop pt-page-delay200 pt-page-ontop';
				break;
			case 31:
				outClass = 'pt-page-rotateBottomSideFirst';
				inClass = 'pt-page-moveFromBottom pt-page-delay200 pt-page-ontop';
				break;
			case 32:
				outClass = 'pt-page-flipOutRight';
				inClass = 'pt-page-flipInLeft pt-page-delay500';
				break;
			case 33:
				outClass = 'pt-page-flipOutLeft';
				inClass = 'pt-page-flipInRight pt-page-delay500';
				break;
			case 34:
				outClass = 'pt-page-flipOutTop';
				inClass = 'pt-page-flipInBottom pt-page-delay500';
				break;
			case 35:
				outClass = 'pt-page-flipOutBottom';
				inClass = 'pt-page-flipInTop pt-page-delay500';
				break;
			case 36:
				outClass = 'pt-page-rotateFall pt-page-ontop';
				inClass = 'pt-page-scaleUp';
				break;
			case 37:
				outClass = 'pt-page-rotateOutNewspaper';
				inClass = 'pt-page-rotateInNewspaper pt-page-delay500';
				break;
			case 38:
				outClass = 'pt-page-rotatePushLeft';
				inClass = 'pt-page-moveFromRight';
				break;
			case 39:
				outClass = 'pt-page-rotatePushRight';
				inClass = 'pt-page-moveFromLeft';
				break;
			case 40:
				outClass = 'pt-page-rotatePushTop';
				inClass = 'pt-page-moveFromBottom';
				break;
			case 41:
				outClass = 'pt-page-rotatePushBottom';
				inClass = 'pt-page-moveFromTop';
				break;
			case 42:
				outClass = 'pt-page-rotatePushLeft';
				inClass = 'pt-page-rotatePullRight pt-page-delay180';
				break;
			case 43:
				outClass = 'pt-page-rotatePushRight';
				inClass = 'pt-page-rotatePullLeft pt-page-delay180';
				break;
			case 44:
				outClass = 'pt-page-rotatePushTop';
				inClass = 'pt-page-rotatePullBottom pt-page-delay180';
				break;
			case 45:
				outClass = 'pt-page-rotatePushBottom';
				inClass = 'pt-page-rotatePullTop pt-page-delay180';
				break;
			case 46:
				outClass = 'pt-page-rotateFoldLeft';
				inClass = 'pt-page-moveFromRightFade';
				break;
			case 47:
				outClass = 'pt-page-rotateFoldRight';
				inClass = 'pt-page-moveFromLeftFade';
				break;
			case 48:
				outClass = 'pt-page-rotateFoldTop';
				inClass = 'pt-page-moveFromBottomFade';
				break;
			case 49:
				outClass = 'pt-page-rotateFoldBottom';
				inClass = 'pt-page-moveFromTopFade';
				break;
			case 50:
				outClass = 'pt-page-moveToRightFade';
				inClass = 'pt-page-rotateUnfoldLeft';
				break;
			case 51:
				outClass = 'pt-page-moveToLeftFade';
				inClass = 'pt-page-rotateUnfoldRight';
				break;
			case 52:
				outClass = 'pt-page-moveToBottomFade';
				inClass = 'pt-page-rotateUnfoldTop';
				break;
			case 53:
				outClass = 'pt-page-moveToTopFade';
				inClass = 'pt-page-rotateUnfoldBottom';
				break;
			case 54:
				outClass = 'pt-page-rotateRoomLeftOut pt-page-ontop';
				inClass = 'pt-page-rotateRoomLeftIn';
				break;
			case 55:
				outClass = 'pt-page-rotateRoomRightOut pt-page-ontop';
				inClass = 'pt-page-rotateRoomRightIn';
				break;
			case 56:
				outClass = 'pt-page-rotateRoomTopOut pt-page-ontop';
				inClass = 'pt-page-rotateRoomTopIn';
				break;
			case 57:
				outClass = 'pt-page-rotateRoomBottomOut pt-page-ontop';
				inClass = 'pt-page-rotateRoomBottomIn';
				break;
			case 58:
				outClass = 'pt-page-rotateCubeLeftOut pt-page-ontop';
				inClass = 'pt-page-rotateCubeLeftIn';
				break;
			case 59:
				outClass = 'pt-page-rotateCubeRightOut pt-page-ontop';
				inClass = 'pt-page-rotateCubeRightIn';
				break;
			case 60:
				outClass = 'pt-page-rotateCubeTopOut pt-page-ontop';
				inClass = 'pt-page-rotateCubeTopIn';
				break;
			case 61:
				outClass = 'pt-page-rotateCubeBottomOut pt-page-ontop';
				inClass = 'pt-page-rotateCubeBottomIn';
				break;
			case 62:
				outClass = 'pt-page-rotateCarouselLeftOut pt-page-ontop';
				inClass = 'pt-page-rotateCarouselLeftIn';
				break;
			case 63:
				outClass = 'pt-page-rotateCarouselRightOut pt-page-ontop';
				inClass = 'pt-page-rotateCarouselRightIn';
				break;
			case 64:
				outClass = 'pt-page-rotateCarouselTopOut pt-page-ontop';
				inClass = 'pt-page-rotateCarouselTopIn';
				break;
			case 65:
				outClass = 'pt-page-rotateCarouselBottomOut pt-page-ontop';
				inClass = 'pt-page-rotateCarouselBottomIn';
				break;
			case 66:
				outClass = 'pt-page-rotateSidesOut';
				inClass = 'pt-page-rotateSidesIn pt-page-delay200';
				break;
			case 67:
				outClass = 'pt-page-rotateSlideOut';
				inClass = 'pt-page-rotateSlideIn';
				break;

		}

		$currPage.addClass( outClass ).on( animEndEventName, function() {
			$currPage.off( animEndEventName );
			endCurrPage = true;
			if( endNextPage ) {
				onEndAnimation( $currPage, $nextPage );
			}
		} );

		$nextPage.addClass( inClass ).on( animEndEventName, function() {
			$nextPage.off( animEndEventName );
			endNextPage = true;
			if( endCurrPage ) {
				onEndAnimation( $currPage, $nextPage );
			}
		} );

		if( !support ) {
			onEndAnimation( $currPage, $nextPage );
		}

	}

	function onEndAnimation( $outpage, $inpage ) {
		endCurrPage = false;
		endNextPage = false;
		resetPage( $outpage, $inpage );
		isAnimating = false;
	}

	function resetPage( $outpage, $inpage ) {
		$outpage.attr( 'class', $outpage.data( 'originalClassList' ) );
		$inpage.attr( 'class', $inpage.data( 'originalClassList' ) + ' pt-page-current' );
	}

	init();

	return {
		init : init,
		nextPage : nextPage
	};

})();