/*
 * mobile navigation unit tests
 */
(function($){
	var transitioning = "ui-mobile-viewport-transitioning",
			animationCompleteFn = $.fn.animationComplete,
			defaultMaxTrans = $.mobile.maxTransitionWidth,

			//TODO centralize class names?
			transitionTypes = "in out fade slide flip reverse pop",

			isTransitioning = function(page){
				return $.grep(transitionTypes.split(" "), function(className, i){
					return page.hasClass(className);
				}).length > 0;
			},

			isTransitioningIn = function(page){
				return page.hasClass("in") && isTransitioning(page);
			},

			disableMaxTransWidth = function(){
				$.mobile.maxTransitionWidth = false;
			},

			enableMaxTransWidth = function(){
				$.mobile.maxTransitionWidth = defaultMaxTrans;
			},

			//animationComplete callback queue
			fromQueue = [],
			toQueue = [],

			resetQueues = function(){
				fromQueue = [];
				toQueue = [];
			},

			onFromComplete = function( f ){
				fromQueue.push( f );
			},

			onToComplete = function( f ){
				toQueue.push( f );
			},


			//wipe all urls
			clearUrlHistory = function(){
				$.mobile.navigate.history.stack = [];
				$.mobile.navigate.history.activeIndex = 0;
			};

	module('jquery.mobile.navigation.js', {
		setup: function(){


			// disable this option so we can test transitions regardless of window width
			disableMaxTransWidth();

			//stub to allow callback before function is returned to transition handler
			$.fn.animationComplete = function( callback ){
				animationCompleteFn.call( this, function(){
					var queue = $(this).is(".out") ? fromQueue : toQueue;
					for( var i = 0, il = queue.length; i < il; i++ ){
						queue.pop()( this );
					}
					callback();
				});

				return this;
			};

			resetQueues();
			clearUrlHistory();

			if ( location.hash !== "#harmless-default-page" ) {
				stop();

				$(document).one("pagechange", function() {
					start();
				} );

				location.hash = "#harmless-default-page";
			}
		},

		teardown: function(){
			// unmock animation complete
			$.fn.animationComplete = animationCompleteFn;
			enableMaxTransWidth();
		}
	});

	/*
	NOTES:
	Our default transition handler now has either one or two animationComplete calls - two if there are two pages in play (from and to)
	To is required, so each async function must call start() onToComplete, not onFromComplete.
	*/
	asyncTest( "changePage applies perspective class to mobile viewport for flip", function(){
		expect(1);

		$.testHelper.pageSequence([
			function() {
				$.mobile.changePage("#foo");
			},

			function() {
				onToComplete( function( el ) {
					ok($("body").hasClass("viewport-flip") || $("body").hasClass("viewport-fade"), "has viewport-flip or viewport-fade");
					start();
				});

				$("#foo > a").first().click();
			}
		]);
	});

	asyncTest( "changePage applies transition class to mobile viewport for default transition", function(){
		expect(1);
		$.testHelper.pageSequence([
			function() {
				$.mobile.changePage("#baz");
			},

			function() {
				onToComplete( function( el ){
					ok($("body").hasClass(transitioning), "has transitioning class");
					start();
				});

				$("#baz > a").click();
			}
		]);
	});

	asyncTest( "explicit transition preferred for page navigation reversal (ie back)", function(){
		expect( 1 );

		onToComplete(function(){
			$("#flip-trans > a").click();
			onToComplete(function(){
				$("#fade-trans > a").click();
				onToComplete(function(){
					ok($("#flip-trans").hasClass("fade"), "has fade class");
					start();
				});
			});
		});

		$("#fade-trans > a").click();
	});

	asyncTest( "default transition is fade", function(){
		onToComplete(function(){
			ok($("#no-trans").hasClass("fade"), "has fade class");
			start();
		});

		$("#default-trans > a").click();
	});

	asyncTest( "changePage queues requests", function(){
		expect(4)
		var firstPage = $("#foo"),
			secondPage = $("#bar");

		$.mobile.changePage(firstPage);
		$.mobile.changePage(secondPage);

		onToComplete(function(){
			ok(isTransitioningIn(firstPage), "first page begins transition");
			ok(!isTransitioningIn(secondPage), "second page doesn't transition yet");
			onToComplete(function(){
				ok(!isTransitioningIn(firstPage), "first page transition should be complete");
				ok(isTransitioningIn(secondPage), "second page should begin transitioning");
				start();

			});
		});
	});

	test( "animationComplete return value", function(){
		$.fn.animationComplete = animationCompleteFn;
		equal($("#foo").animationComplete(function(){})[0], $("#foo")[0]);
	});


	// reusable function for a few tests below
	function testTransitionMaxWidth( val, expected ){
		expect( 1 );

		$.mobile.maxTransitionWidth = val;

		var transitionOccurred = false;

		onToComplete(function(){
			transitionOccurred = true;
		});


		return setTimeout(function(){
			ok( transitionOccurred === expected, (expected ? "" : "no ") + "transition occurred" );
			start();
		}, 5000);

		$.mobile.changePage( $(".ui-page:not(.ui-page-active)").first() );

	}

	asyncTest( "maxTransitionWidth property disables transitions when value is less than browser width", function(){
		testTransitionMaxWidth( $( window ).width() - 1, false );
	});

	asyncTest( "maxTransitionWidth property disables transitions when value is false", function(){
		testTransitionMaxWidth( false, false );
	});
})(jQuery);