( function ( mw, $ ) {
	QUnit.module( 'mmv.bootstrap', QUnit.newMwEnvironment() );

	function createGallery ( imageSrc ) {
		var div = $( '<div>' ).addClass( 'gallery' ).appendTo( '#qunit-fixture' ),
			link = $( '<a>' ).addClass( 'image' ).appendTo( div );

		$( '<img>' ).attr( 'src',  ( imageSrc || 'thumb.jpg' ) ).appendTo( link );

		return div;
	}

	function createThumb( imageSrc, caption ) {
		var div = $( '<div>' ).addClass( 'thumb' ).appendTo( '#qunit-fixture' ),
			link = $( '<a>' ).addClass( 'image' ).appendTo( div );

		$( '<div>' ).addClass( 'thumbcaption' ).appendTo( div ).text( caption );
		$( '<img>' ).attr( 'src', ( imageSrc || 'thumb.jpg' ) ).appendTo( link );

		return div;
	}

	QUnit.test( 'Check viewer invoked when clicking on legit image links', 2, function ( assert ) {
		// TODO: Is <div class="gallery"><span class="image"><img/></span></div> valid ???
		var div, link, link2, link3, bootstrap,
			oldLoadImageByTitle = mw.mediaViewer.loadImageByTitle;

		// Create gallery with legit link image
		div = createGallery();
		link = div.find( 'a.image' );

		// Legit isolated thumbnail
		link2 = $( '<a>' ).addClass( 'image' ).appendTo( '#qunit-fixture' );
		$( '<img>' ).attr( 'src',  'thumb2.jpg' ).appendTo( link2 );

		// Non-legit fragment
		link3 = $( '<a>' ).addClass( 'noImage' ).appendTo( div );
		$( '<img>' ).attr( 'src',  'thumb3.jpg' ).appendTo( link3 );

		// Create a new bootstrap object to trigger the DOM scan, etc.
		bootstrap = new mw.mmv.MultimediaViewerBootstrap();

		mw.mediaViewer.loadImageByTitle = function() {
			assert.ok( true, 'Image loaded' );
		};

		// Click on legit link
		link.trigger( { type : 'click', which : 1 } );

		// Click on legit link
		link2.trigger( { type : 'click', which : 1 } );

		mw.mediaViewer.loadImageByTitle = function() {
			assert.ok( false, 'Image should not be loaded' );
		};

		// Click on non-legit link
		link3.trigger( { type : 'click', which : 1 } );

		mw.mediaViewer.loadImageByTitle = oldLoadImageByTitle;
		bootstrap.hash = $.noop;
	} );

	QUnit.test( 'Skip images with invalid extensions', 0, function ( assert ) {
		var div, link, bootstrap,
			oldLoadImageByTitle = mw.mediaViewer.loadImageByTitle;

		// Create gallery with image that has invalid name extension
		div = createGallery( 'thumb.badext' );
		link = div.find( 'a.image' );

		// Create a new bootstrap object to trigger the DOM scan, etc.
		bootstrap = new mw.mmv.MultimediaViewerBootstrap();

		mw.mediaViewer.loadImageByTitle = function() {
			assert.ok( false, 'Image should not be loaded' );
		};

		// Click on legit link with wrong image extension
		link.trigger( { type : 'click', which : 1 } );

		mw.mediaViewer.loadImageByTitle = oldLoadImageByTitle;
		bootstrap.hash = $.noop;
	} );

	QUnit.test( 'Accept only left clicks without modifier keys, skip the rest', 1, function ( assert ) {
		var $div, $link, bootstrap,
			oldLoadImageByTitle = mw.mediaViewer.loadImageByTitle;

		// Create gallery with image that has invalid name extension
		$div = createGallery();

		// Create a new bootstrap object to trigger the DOM scan, etc.
		bootstrap = new mw.mmv.MultimediaViewerBootstrap();

		$link = $div.find( 'a.image' );

		mw.mediaViewer.loadImageByTitle = function() {
			assert.ok( true, 'Image loaded' );
		};

		// Handle valid left click, it should try to load the image
		$link.trigger( { type : 'click', which : 1 } );

		mw.mediaViewer.loadImageByTitle = function() {
			assert.ok( false, 'Image should not be loaded' );
		};

		// Skip Ctrl-left-click, no image is loaded
		$link.trigger( { type : 'click', which : 1, ctrlKey : true } );

		// Skip invalid right click, no image is loaded
		$link.trigger( { type : 'click', which : 2 } );

		mw.mediaViewer.loadImageByTitle = oldLoadImageByTitle;
		bootstrap.hash = $.noop;
	} );

	QUnit.test( 'Ensure that the correct title is loaded when clicking', 1, function ( assert ) {
		var bootstrap,
			oldByTitle,
			$div = createGallery( 'foo.jpg' ),
			$link = $div.find( 'a.image' );

		oldByTitle = mw.mediaViewer.loadImageByTitle;

		mw.mediaViewer.loadImageByTitle = function ( loadedTitle ) {
			assert.strictEqual( loadedTitle, 'File:Foo.jpg', 'Titles are identical' );
		};

		// Create a new bootstrap object to trigger the DOM scan, etc.
		bootstrap = new mw.mmv.MultimediaViewerBootstrap();

		$link.trigger( { type : 'click', which : 1 } );

		mw.mediaViewer.loadImageByTitle = oldByTitle;
		bootstrap.hash = $.noop;
	} );

	QUnit.test( 'Validate new LightboxImage object has sane constructor parameters', 6, function ( assert ) {
		var bootstrap,
			$div,
			$link,
			oldNewImage = mw.mediaViewer.createNewImage,
			oldLoadImage = mw.mediaViewer.loadImage,
			fname = 'valid',
			imgSrc = '/' + fname + '.jpg/300px-' + fname + '.jpg',
			imgRegex = new RegExp( imgSrc + '$' );

		$div = createThumb( imgSrc, 'Blah blah' );
		$link = $div.find( 'a.image' );

		mw.mediaViewer.loadImage = $.noop;

		mw.mediaViewer.createNewImage = function ( fileLink, filePageLink, fileTitle, index, thumb, caption ) {
			assert.ok( fileLink.match( imgRegex ), 'Thumbnail URL used in creating new image object' );
			assert.strictEqual( filePageLink, '', 'File page link is sane when creating new image object' );
			assert.strictEqual( fileTitle.title, fname, 'Filename is correct when passed into new image constructor' );
			assert.strictEqual( index, 0, 'The only image we created in the gallery is set at index 0 in the images array' );
			assert.strictEqual( thumb.outerHTML, '<img src="' + imgSrc + '">', 'The image element passed in is the thumbnail we want.' );
			assert.strictEqual( caption, 'Blah blah', 'The caption passed in is correct' );
		};

		// Create a new bootstrap object to trigger the DOM scan, etc.
		bootstrap = new mw.mmv.MultimediaViewerBootstrap();

		$link.trigger( { type : 'click', which : 1 } );

		mw.mediaViewer.createNewImage = oldNewImage;
		mw.mediaViewer.loadImage = oldLoadImage;
		bootstrap.hash = $.noop;
	} );

	QUnit.test( 'Only load the viewer on a valid hash', 1, function ( assert ) {
		var bootstrap;

		window.location.hash = '';

		bootstrap = new mw.mmv.MultimediaViewerBootstrap();

		bootstrap.loadViewer = function () {
			assert.ok( false, 'Viewer should not be loaded' );
			return $.Deferred().reject();
		};

		window.location.hash = 'Foo';

		bootstrap.loadViewer = function () {
			assert.ok( true, 'Viewer should be loaded' );
			return $.Deferred().reject();
		};

		window.location.hash = 'mediaviewer/foo';

		bootstrap.hash = $.noop;

		window.location.hash = '';
	} );
}( mediaWiki, jQuery ) );