import * as renderer from '../../../src/ui/renderer';

var $ = jQuery;

/**
 * A utility function that creates a bare bones preview
 *
 * @param {boolean} [isTall]
 * @param {boolean} [hasThumbnail]
 * @param {ext.popups.Thumbnail} [thumbnail]
 * @return {ext.popups.Preview}
 */
function createPreview( isTall, hasThumbnail, thumbnail ) {
	return {
		el: $( '<div>' )
			.append( hasThumbnail ? $( '<image>' ) : '' )
			.append( $( '<a>', { 'class': 'mwe-popups-extract', text: 'extract' } ) )
			.append( $( '<a>', { 'class': 'mwe-popups-settings-icon' } ) ),
		isTall: isTall,
		hasThumbnail: hasThumbnail,
		thumbnail: thumbnail
	};
}

function createBehavior( sandbox ) {
	return {
		settingsUrl: 'https://settings.url',
		showSettings: sandbox.spy(),
		previewDwell: sandbox.spy(),
		previewAbandon: sandbox.spy(),
		previewShow: sandbox.spy(),
		click: sandbox.spy()
	};
}

QUnit.module( 'ext.popups#renderer', {
	beforeEach: function () {
		var self = this;

		$.bracketedDevicePixelRatio = function () {
			return 1;
		};

		window.mediaWiki.RegExp = {
			escape: this.sandbox.spy( function ( str ) {
				return str.replace( /([\\{}()|.?*+\-^$[\]])/g, '\\$1' );
			} )
		};

		window.mediaWiki.msg = function ( key ) {
			switch ( key ) {
				case 'popups-preview-no-preview':
					return 'Looks like there isn\'t a preview for this page';
				case 'popups-preview-footer-read':
					return 'Read';
			}
		};

		this.renderSpy = this.sandbox.spy();
		window.mediaWiki.template = {
			get: function () {
				return {
					render: self.renderSpy
				};
			}
		};
	},
	afterEach: function () {
		$.bracketedDevicePixelRatio = null;
		window.mediaWiki.RegExp = null;
		window.mediaWiki.msg = null;
		window.mediaWiki.template = null;
	}
} );

QUnit.test( 'createPokeyMasks', function ( assert ) {
	var $container = $( '<div>' ),
		cases = [
			[ 'clippath#mwe-popups-mask polygon', '0 8, 10 8, 18 0, 26 8, 1000 8, 1000 1000, 0 1000' ],
			[ 'clippath#mwe-popups-mask-flip polygon', '0 8, 274 8, 282 0, 290 8, 1000 8, 1000 1000, 0 1000' ],
			[ 'clippath#mwe-popups-landscape-mask polygon', '0 8, 174 8, 182 0, 190 8, 1000 8, 1000 1000, 0 1000' ],
			[ 'clippath#mwe-popups-landscape-mask-flip polygon', '0 0, 1000 0, 1000 242, 190 242, 182 250, 174 242, 0 242' ]
		];

	renderer.createPokeyMasks( $container.get( 0 ) );

	cases.forEach( function ( case_ ) {
		assert.equal(
			$container.find( case_[ 0 ] ).attr( 'points' ),
			case_[ 1 ]
		);
	} );
} );

QUnit.test( 'createPreview', function ( assert ) {
	var model = {
			title: 'Test',
			url: 'https://en.wikipedia.org/wiki/Test',
			languageCode: 'en',
			languageDirection: 'ltr',
			extract: 'This is a test page.',
			thumbnail: {
				source: 'https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/409px-President_Barack_Obama.jpg',
				width: 409,
				height: 512
			}
		},
		preview;

	window.mediaWiki.template = {
		get: function () {
			return {
				render: function () {
					return $( '<div>', { 'class': 'mwe-popups-discreet' } )
						.append( $( '<div>', { 'class': 'mwe-popups-extract' } ) );
				}
			};
		}
	};

	preview = renderer.createPreview( model );

	assert.equal( preview.hasThumbnail, true, 'Preview has thumbnail.' );
	assert.deepEqual(
		preview.thumbnail,
		renderer.createThumbnail( model.thumbnail ),
		'Preview thumbnail is the correct one.'
	);
	assert.equal(
		preview.isTall,
		true,
		'Preview is tall (because the thumbnail is tall).'
	);
	assert.equal(
		preview.el.find( '.mwe-popups-extract' ).text(),
		'This is a test page.',
		'Preview extract is correct.'
	);
} );

QUnit.test( 'createEmptyPreview', function ( assert ) {
	var model = {
			title: 'Test',
			url: 'https://en.wikipedia.org/wiki/Test',
			languageCode: 'en',
			languageDirection: 'ltr',
			extract: 'This is a test page.',
			thumbnail: {
				source: 'https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/409px-President_Barack_Obama.jpg',
				width: 409,
				height: 512
			}
		},
		emptyPreview = renderer.createEmptyPreview( model );

	assert.equal(
		emptyPreview.hasThumbnail,
		false,
		'Empty preview doesn\'t have a thumbnail (even though one is provided).'
	);

	assert.equal(
		emptyPreview.isTall,
		false,
		'Empty preview is never tall (even though the supplied thumbnail is tall).'
	);

	assert.ok( this.renderSpy.calledOnce, 'Template has been rendered.' );

	assert.deepEqual(
		this.renderSpy.getCall( 0 ).args[ 0 ],
		$.extend( {}, model, {
			extractMsg: 'Looks like there isn\'t a preview for this page',
			readMsg: 'Read'
		} ),
		'Template is called with the correct data.'
	);
} );

QUnit.test( 'bindBehavior - preview dwell', function ( assert ) {
	var preview = createPreview(),
		behavior = createBehavior( this.sandbox );

	renderer.bindBehavior( preview, behavior );
	preview.el.mouseenter();

	assert.ok( behavior.previewDwell.calledOnce, 'Preview dwell is called.' );
	assert.notOk( behavior.previewAbandon.called, 'Preview abandon is NOT called.' );
	assert.notOk( behavior.click.called, 'Click is NOT called.' );
	assert.notOk( behavior.showSettings.called, 'Show settings is NOT called.' );
} );

QUnit.test( 'bindBehavior - preview abandon', function ( assert ) {
	var preview = createPreview(),
		behavior = createBehavior( this.sandbox );

	renderer.bindBehavior( preview, behavior );
	preview.el.mouseleave();

	assert.notOk( behavior.previewDwell.called, 'Preview dwell is NOT called.' );
	assert.ok( behavior.previewAbandon.calledOnce, 'Preview abandon is called.' );
	assert.notOk( behavior.click.called, 'Click is NOT called.' );
	assert.notOk( behavior.showSettings.called, 'Show settings is NOT called.' );
} );

QUnit.test( 'bindBehavior - preview click', function ( assert ) {
	var preview = createPreview(),
		behavior = createBehavior( this.sandbox );

	renderer.bindBehavior( preview, behavior );
	preview.el.click();

	assert.notOk( behavior.previewDwell.called, 'Preview dwell is NOT called.' );
	assert.notOk( behavior.previewAbandon.called, 'Preview abandon is NOT called.' );
	assert.ok( behavior.click.calledOnce, 'Click is called.' );
	assert.notOk( behavior.showSettings.called, 'Settings link click is NOT called.' );
} );

QUnit.test( 'bindBehavior - settings link click', function ( assert ) {
	var preview = createPreview(),
		behavior = createBehavior( this.sandbox );

	renderer.bindBehavior( preview, behavior );
	preview.el.find( '.mwe-popups-settings-icon' ).click();

	assert.notOk( behavior.previewDwell.called, 'Preview dwell is NOT called.' );
	assert.notOk( behavior.previewAbandon.called, 'Preview abandon is NOT called.' );
	assert.notOk( behavior.click.called, 'Click is NOT called.' );
	assert.ok( behavior.showSettings.calledOnce, 'Settings link click is called.' );
} );

QUnit.test( 'bindBehavior - settings link URL', function ( assert ) {
	var preview = createPreview(),
		behavior = createBehavior( this.sandbox );

	renderer.bindBehavior( preview, behavior );

	assert.equal(
		preview.el.find( '.mwe-popups-settings-icon' ).attr( 'href' ),
		behavior.settingsUrl,
		'Settings link URL is correct.'
	);
} );

QUnit.test( 'show', function ( assert ) {
	var preview = createPreview(),
		event = {
			pageX: 252,
			pageY: 1146,
			clientY: 36
		},
		link = {
			get: function () {
				return {
					getClientRects: function () {
						return [ {
							bottom: 37,
							height: 13,
							left: 201,
							right: 357,
							top: 24,
							width: 156
						} ];
					}
				};
			},
			offset: function () {
				return {
					top: 1134,
					left: 201
				};
			},
			width: function () {
				return 156;
			},
			height: function () {
				return 13;
			}
		},
		behavior = createBehavior( this.sandbox ),
		token = 'some-token',
		$container = $( '<div>' ),
		showPreview;

	preview.el.show = this.sandbox.stub();

	showPreview = renderer.show(
		preview, event, link, behavior, token, $container.get( 0 ) );

	assert.notEqual(
		$container.html(),
		'',
		'Container is not empty.'
	);
	assert.ok(
		preview.el.show.calledOnce,
		'Preview has been shown.'
	);

	return showPreview.then( function () {
		assert.ok(
			behavior.previewShow.calledWith( token ),
			'previewShow has been called with the correct token.'
		);
	} );
} );

QUnit.test( 'hide - fade out up', function ( assert ) {
	var preview = {
			el: $( '<div>', { 'class': 'mwe-popups-fade-in-down' } ),
			hasThumbnail: false,
			thumbnail: null,
			isTall: false
		},
		$container = $( '<div>' ).append( preview.el ),
		hidePreview = renderer.hide( preview );

	assert.ok(
		preview.el.hasClass( 'mwe-popups-fade-out-up' ),
		'Thumbnail has faded out up.'
	);
	assert.notOk(
		preview.el.hasClass( 'mwe-popups-fade-in-down' ),
		'Fade-in class has been removed.'
	);
	assert.notEqual(
		$container.html(),
		'',
		'Preview is still in the container.'
	);
	return hidePreview.then( function () {
		assert.equal(
			$container.html(),
			'',
			'Preview has been removed from the container.'
		);
	} );
} );

QUnit.test( 'hide - fade out down', function ( assert ) {
	var preview = {
			el: $( '<div>', { 'class': 'mwe-popups-fade-in-up' } ),
			hasThumbnail: false,
			thumbnail: null,
			isTall: false
		},
		$container = $( '<div>' ).append( preview.el ),
		hidePreview = renderer.hide( preview );

	assert.ok(
		preview.el.hasClass( 'mwe-popups-fade-out-down' ),
		'Thumbnail has faded out down.'
	);
	assert.notOk(
		preview.el.hasClass( 'mwe-popups-fade-in-up' ),
		'Fade-in class has been removed.'
	);
	assert.notEqual(
		$container.html(),
		'',
		'Preview is still in the container.'
	);
	return hidePreview.then( function () {
		assert.equal(
			$container.html(),
			'',
			'Preview has been removed from the container.'
		);
	} );
} );

QUnit.test( 'createThumbnail - tall image', function ( assert ) {
	var devicePixelRatio = $.bracketedDevicePixelRatio(),
		rawThumbnail = {
			source: 'https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/409px-President_Barack_Obama.jpg',
			width: 409,
			height: 512
		},
		thumbnail = renderer.createThumbnail( rawThumbnail );

	assert.equal(
		thumbnail.isTall,
		true,
		'Thumbnail is tall.'
	);
	assert.equal(
		thumbnail.width,
		thumbnail.width / devicePixelRatio,
		'Thumbnail width is correct.'
	);
	assert.equal(
		thumbnail.height,
		thumbnail.height / devicePixelRatio,
		'Thumbnail height is correct.'
	);
} );

QUnit.test( 'createThumbnail - tall image element', function ( assert ) {
	var thumbnail,
		cases = [
			{
				width: 200,
				height: 300,
				expectedX: 203 - 200,
				expectedY: ( 300 - 250 ) / -2,
				expectedSVGWidth: 203,
				expectedSVGHeight: 250,
				message: 'Width smaller than the predefined width (203).'
			},
			{
				width: 250,
				height: 300,
				expectedX: ( 250 - 203 ) / -2,
				expectedY: ( 300 - 250 ) / -2,
				expectedSVGWidth: 203,
				expectedSVGHeight: 250,
				message: 'Width bigger than the predefined width (203).'
			}
		];

	cases.forEach( function ( case_ ) {
		thumbnail = renderer.createThumbnail( {
			source: 'https://image.url',
			width: case_.width,
			height: case_.height
		} );

		assert.equal(
			thumbnail.el.find( 'image' ).attr( 'x' ),
			case_.expectedX,
			'Image element x coordinate is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.find( 'image' ).attr( 'y' ),
			case_.expectedY,
			'Image element y coordinate is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.find( 'image' ).attr( 'width' ),
			case_.width,
			'Image element width is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.find( 'image' ).attr( 'height' ),
			case_.height,
			'Image element height is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.attr( 'width' ),
			case_.expectedSVGWidth,
			'Image SVG width is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.attr( 'height' ),
			case_.expectedSVGHeight,
			'Image SVG height is correct. ' + case_.message
		);
	} );
} );

QUnit.test( 'createThumbnail - landscape image', function ( assert ) {
	var devicePixelRatio = $.bracketedDevicePixelRatio(),
		rawThumbnail = {
			source: 'https://upload.wikimedia.org/wikipedia/commons/thumb/8/8d/President_Barack_Obama.jpg/500px-President_Barack_Obama.jpg',
			width: 500,
			height: 400
		},
		thumbnail = renderer.createThumbnail( rawThumbnail );

	assert.equal(
		thumbnail.isTall,
		false,
		'Thumbnail is not tall.'
	);
	assert.equal(
		thumbnail.width,
		thumbnail.width / devicePixelRatio,
		'Thumbnail width is correct.'
	);
	assert.equal(
		thumbnail.height,
		thumbnail.height / devicePixelRatio,
		'Thumbnail height is correct.'
	);
} );

QUnit.test( 'createThumbnail - landscape image element', function ( assert ) {
	var thumbnail,
		cases = [
			{
				width: 400,
				height: 150,
				expectedX: 0,
				expectedY: 0,
				expectedSVGWidth: 320 + 3,
				expectedSVGHeight: 150,
				message: 'Height smaller than the predefined height (200).'
			},
			{
				width: 400,
				height: 250,
				expectedX: 0,
				expectedY: ( 250 - 200 ) / -2,
				expectedSVGWidth: 320 + 3,
				expectedSVGHeight: 200,
				message: 'Height bigger than the predefined height (200).'
			}
		];

	cases.forEach( function ( case_ ) {
		thumbnail = renderer.createThumbnail( {
			source: 'https://image.url',
			width: case_.width,
			height: case_.height
		} );

		assert.equal(
			thumbnail.el.find( 'image' ).attr( 'x' ),
			case_.expectedX,
			'Image x coordinate is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.find( 'image' ).attr( 'y' ),
			case_.expectedY,
			'Image y coordinate is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.find( 'image' ).attr( 'width' ),
			case_.width,
			'Image element width is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.find( 'image' ).attr( 'height' ),
			case_.height,
			'Image element height is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.attr( 'width' ),
			case_.expectedSVGWidth,
			'Image SVG width is correct. ' + case_.message
		);
		assert.equal(
			thumbnail.el.attr( 'height' ),
			case_.expectedSVGHeight,
			'Image SVG height is correct. ' + case_.message
		);
	} );
} );

QUnit.test( 'createThumbnail - no raw thumbnail', function ( assert ) {
	var thumbnail = renderer.createThumbnail( null );

	assert.equal( thumbnail, null, 'No thumbnail.' );
} );

QUnit.test( 'createThumbnail - small wide image', function ( assert ) {
	var rawThumbnail = {
			source: 'https://landscape-image.jpg',
			width: 299,
			height: 298
		},
		thumbnail = renderer.createThumbnail( rawThumbnail );

	assert.equal( thumbnail, null, 'No thumbnail.' );
} );

QUnit.test( 'createThumbnail - small tall image', function ( assert ) {
	var rawThumbnail = {
			source: 'https://tall-image.jpg',
			width: 248,
			height: 249
		},
		thumbnail = renderer.createThumbnail( rawThumbnail );

	assert.equal( thumbnail, null, 'No thumbnail.' );
} );

QUnit.test( 'createThumbnail - insecure URL', function ( assert ) {
	var cases = [
			'https://tall-ima\\ge.jpg',
			'https://tall-ima\'ge.jpg',
			'https://tall-ima"ge.jpg'
		],
		thumbnail;

	cases.forEach( function ( case_ ) {
		thumbnail = renderer.createThumbnail( {
			source: case_,
			width: 500,
			height: 400
		} );

		assert.equal( thumbnail, null, 'No thumbnail.' );
	} );
} );

QUnit.test( 'createThumbnailElement', function ( assert ) {
	var className = 'thumb-class',
		url = 'https://thumbnail.url',
		x = 25,
		y = 50,
		thumbnailWidth = 200,
		thumbnailHeight = 250,
		width = 500,
		height = 300,
		clipPath = 'mwe-popups-mask',
		$thumbnail = renderer.createThumbnailElement(
			className, url, x, y, thumbnailWidth, thumbnailHeight,
			width, height, clipPath );

	assert.equal(
		$thumbnail.html(),
		'<image href="https://thumbnail.url" class="thumb-class" x="25" y="50" width="200" height="250" clip-path="url(#mwe-popups-mask)"></image>',
		'Thumbnail HTML is correct.'
	);
	assert.equal(
		$thumbnail.attr( 'xmlns' ),
		'http://www.w3.org/2000/svg',
		'SVG namespace is correct.'
	);
	assert.equal( $thumbnail.attr( 'height' ), height, 'SVG height is correct.' );
	assert.equal( $thumbnail.attr( 'width' ), width, 'SVG width is correct.' );

} );

QUnit.test( '#createLayout - portrait preview, mouse event, link is on the top left of the page', function ( assert ) {
	var isPreviewTall = false,
		eventData = {
			pageX: 252,
			pageY: 1146,
			clientY: 36
		},
		linkData = {
			clientRects: [ {
				bottom: 37,
				height: 13,
				left: 201,
				right: 357,
				top: 24,
				width: 156
			} ],
			offset: {
				top: 1134,
				left: 201
			},
			width: 156,
			height: 13
		},
		windowData = {
			scrollTop: 1109,
			width: 1239,
			height: 827
		},
		pokeySize = 8,
		layout = renderer.createLayout( isPreviewTall, eventData, linkData, windowData, pokeySize );

	assert.deepEqual(
		layout,
		{
			offset: {
				top: 1154,
				left: 232
			},
			flippedX: false,
			flippedY: false
		},
		'Layout is correct.'
	);
} );

QUnit.test( '#createLayout - tall preview, mouse event, link is on the bottom center of the page', function ( assert ) {
	var isPreviewTall = true,
		eventData = {
			pageX: 176,
			pageY: 1252,
			clientY: 628
		},
		linkData = {
			clientRects: [ {
				bottom: 640,
				height: 13,
				left: 177,
				right: 209,
				top: 627,
				width: 32
			} ],
			offset: {
				top: 1250,
				left: 177
			},
			width: 32,
			height: 13
		},
		windowData = {
			scrollTop: 623,
			width: 587,
			height: 827
		},
		pokeySize = 8,
		layout = renderer.createLayout( isPreviewTall, eventData, linkData, windowData, pokeySize );

	assert.deepEqual(
		layout,
		{
			offset: {
				top: 1242,
				left: 156
			},
			flippedX: false,
			flippedY: true
		},
		'Layout is correct. Y is flipped.'
	);
} );

QUnit.test( '#createLayout - empty preview, keyboard event, link is on the center right of the page', function ( assert ) {
	var isPreviewTall = false,
		eventData = {},
		linkData = {
			clientRects: [ {
				bottom: 442,
				height: 13,
				left: 654,
				right: 692,
				top: 430,
				width: 38
			} ],
			offset: {
				top: 1118,
				left: 654
			},
			width: 38,
			height: 13
		},
		windowData = {
			scrollTop: 689,
			width: 801,
			height: 827
		},
		pokeySize = 8,
		layout = renderer.createLayout( isPreviewTall, eventData, linkData, windowData, pokeySize );

	assert.deepEqual(
		layout,
		{
			offset: {
				top: 1110,
				left: 372
			},
			flippedX: true,
			flippedY: true
		},
		'Layout is correct. Both X and Y are flipped.'
	);
} );

QUnit.test( '#getClasses when no thumbnail is available', function ( assert ) {
	var cases = [
		// [ previewOptions, layoutOptions, expected, message ]
		[
			{
				hasThumbnail: false,
				isTall: false
			},
			{
				flippedX: false,
				flippedY: false
			},
			[
				'mwe-popups-fade-in-up',
				'mwe-popups-no-image-tri',
				'mwe-popups-is-not-tall'
			],
			'No flip.'
		],
		[
			{
				hasThumbnail: false,
				isTall: false
			},
			{
				flippedX: false,
				flippedY: true
			},
			[
				'mwe-popups-fade-in-down',
				'flipped_y',
				'mwe-popups-is-not-tall'
			],
			'Y flipped.'
		],
		[
			{
				hasThumbnail: false,
				isTall: false
			},
			{
				flippedX: true,
				flippedY: false
			},
			[
				'mwe-popups-fade-in-up',
				'flipped_x',
				'mwe-popups-no-image-tri',
				'mwe-popups-is-not-tall'
			],
			'X flipped.'
		],
		[
			{
				hasThumbnail: false,
				isTall: false
			},
			{
				flippedX: true,
				flippedY: true
			},
			[
				'mwe-popups-fade-in-down',
				'flipped_x_y',
				'mwe-popups-is-not-tall'
			],
			'X and Y flipped.'
		]
	];

	cases.forEach( function ( case_ ) {
		assert.deepEqual(
			renderer.getClasses( case_[ 0 ], case_[ 1 ] ),
			case_[ 2 ],
			case_[ 3 ]
		);
	} );
} );
QUnit.test( '#getClasses when a non-tall thumbnail is available', function ( assert ) {
	var cases = [
		[
			{
				hasThumbnail: true,
				isTall: false
			},
			{
				flippedX: false,
				flippedY: false
			},
			[
				'mwe-popups-fade-in-up',
				'mwe-popups-image-tri',
				'mwe-popups-is-not-tall'
			],
			'No flip.'
		],
		[
			{
				hasThumbnail: true,
				isTall: false
			},
			{
				flippedX: false,
				flippedY: true
			},
			[
				'mwe-popups-fade-in-down',
				'flipped_y',
				'mwe-popups-is-not-tall'
			],
			'Y flipped.'
		],
		[
			{
				hasThumbnail: true,
				isTall: false
			},
			{
				flippedX: true,
				flippedY: false
			},
			[
				'mwe-popups-fade-in-up',
				'flipped_x',
				'mwe-popups-image-tri',
				'mwe-popups-is-not-tall'
			],
			'X flipped.'
		],
		[
			{
				hasThumbnail: true,
				isTall: false
			},
			{
				flippedX: true,
				flippedY: true
			},
			[
				'mwe-popups-fade-in-down',
				'flipped_x_y',
				'mwe-popups-is-not-tall'
			],
			'X and Y flipped.'
		]
	];

	cases.forEach( function ( case_ ) {
		assert.deepEqual(
			renderer.getClasses( case_[ 0 ], case_[ 1 ] ),
			case_[ 2 ],
			case_[ 3 ]
		);
	} );
} );

QUnit.test( '#getClasses when a tall thumbnail is available', function ( assert ) {
	var cases = [
		[
			{
				hasThumbnail: true,
				isTall: true
			},
			{
				flippedX: false,
				flippedY: false
			},
			[
				'mwe-popups-fade-in-up',
				'mwe-popups-no-image-tri',
				'mwe-popups-is-tall'
			],
			'No flip.'
		],
		[
			{
				hasThumbnail: true,
				isTall: true
			},
			{
				flippedX: false,
				flippedY: true
			},
			[
				'mwe-popups-fade-in-down',
				'flipped_y',
				'mwe-popups-is-tall'
			],
			'Y flipped.'
		],
		[
			{
				hasThumbnail: true,
				isTall: true
			},
			{
				flippedX: true,
				flippedY: false
			},
			[
				'mwe-popups-fade-in-up',
				'flipped_x',
				'mwe-popups-no-image-tri',
				'mwe-popups-is-tall'
			],
			'X flipped.'
		],
		[
			{
				hasThumbnail: true,
				isTall: true
			},
			{
				flippedX: true,
				flippedY: true
			},
			[
				'mwe-popups-fade-in-down',
				'flipped_x_y',
				'mwe-popups-is-tall'
			],
			'X and Y flipped.'
		]
	];

	cases.forEach( function ( case_ ) {
		assert.deepEqual(
			renderer.getClasses( case_[ 0 ], case_[ 1 ] ),
			case_[ 2 ],
			case_[ 3 ]
		);
	} );
} );

QUnit.test( '#layoutPreview - no thumbnail', function ( assert ) {
	var preview = createPreview( false, false, null ),
		layout = {
			flippedX: false,
			flippedY: false,
			offset: {
				top: 100,
				left: 200
			}
		},
		classes = [ 'some-class', 'another-class' ];

	renderer.layoutPreview( preview, layout, classes, 200, 8 );

	assert.ok(
		preview.el.hasClass( classes.join( ' ' ) ),
		'Classes have been added.'
	);
	assert.equal(
		preview.el.css( 'top' ),
		layout.offset.top + 'px',
		'Top is correct.'
	);
	assert.equal(
		preview.el.css( 'left' ),
		layout.offset.left + 'px',
		'Left is correct.'
	);
} );

QUnit.test( '#layoutPreview - tall preview, flipped X, has thumbnail', function ( assert ) {
	var preview = createPreview( true, true, { height: 200 } ),
		layout = {
			flippedX: true,
			flippedY: false,
			offset: {
				top: 100,
				left: 200
			}
		},
		classes = [ 'some-class', 'another-class' ];

	renderer.layoutPreview( preview, layout, classes, 200, 8 );

	assert.ok(
		preview.el.hasClass( classes.join( ' ' ) ),
		'Classes have been added.'
	);
	assert.equal(
		preview.el.css( 'top' ),
		layout.offset.top + 'px',
		'Top is correct.'
	);
	assert.equal(
		preview.el.css( 'left' ),
		layout.offset.left + 'px',
		'Left is correct.'
	);
	assert.notOk(
		preview.el.hasClass( 'mwe-popups-no-image-tri' ),
		'A class has been removed.'
	);
	assert.equal(
		preview.el.find( 'image' ).attr( 'clip-path' ),
		'url(#mwe-popups-landscape-mask)',
		'Image clip path is correct.'
	);
} );

QUnit.test( '#layoutPreview - portrait preview, flipped X, has thumbnail, small height', function ( assert ) {
	var preview = createPreview( false, true, { height: 199 } ),
		layout = {
			flippedX: true,
			flippedY: false,
			offset: {
				top: 100,
				left: 200
			}
		},
		classes = [ 'some-class', 'another-class' ];

	renderer.layoutPreview( preview, layout, classes, 200, 8 );

	assert.ok(
		preview.el.hasClass( classes.join( ' ' ) ),
		'Classes have been added.'
	);
	assert.equal(
		preview.el.css( 'top' ),
		layout.offset.top + 'px',
		'Top is correct.'
	);
	assert.equal(
		preview.el.css( 'left' ),
		layout.offset.left + 'px',
		'Left is correct.'
	);
	assert.equal(
		preview.el.find( '.mwe-popups-extract' ).css( 'margin-top' ),
		( 199 - 8 ) + 'px', // thumb height - pokey size
		'Extract margin top has been set when preview height is smaller than the predefined landscape image height.'
	);
	assert.equal(
		preview.el.find( 'image' ).attr( 'clip-path' ),
		'url(#mwe-popups-mask-flip)',
		'Image clip path is correct.'
	);
} );

QUnit.test( '#layoutPreview - portrait preview, flipped X, has thumbnail, big height', function ( assert ) {
	var preview = createPreview( false, true, { height: 201 } ),
		layout = {
			flippedX: true,
			flippedY: false,
			offset: {
				top: 100,
				left: 200
			}
		},
		classes = [ 'some-class', 'another-class' ];

	renderer.layoutPreview( preview, layout, classes, 200, 8 );

	assert.ok(
		preview.el.hasClass( classes.join( ' ' ) ),
		'Classes have been added.'
	);
	assert.equal(
		preview.el.css( 'top' ),
		layout.offset.top + 'px',
		'Top is correct.'
	);
	assert.equal(
		preview.el.css( 'left' ),
		layout.offset.left + 'px',
		'Left is correct.'
	);
	assert.equal(
		preview.el.find( '.mwe-popups-extract' ).attr( 'margin-top' ),
		undefined,
		'Extract margin top has NOT been set when preview height is bigger than the predefined landscape image height.'
	);
	assert.equal(
		preview.el.find( 'image' ).attr( 'clip-path' ),
		'url(#mwe-popups-mask-flip)',
		'Image clip path is correct.'
	);
} );

QUnit.test( '#layoutPreview - tall preview, has thumbnail, flipped Y', function ( assert ) {
	var preview = createPreview( true, true, { height: 200 } ),
		layout = {
			flippedX: false,
			flippedY: true,
			offset: {
				top: 100,
				left: 200
			}
		},
		classes = [ 'some-class', 'another-class' ];

	preview.el.outerHeight = function () {
		return 20;
	};

	renderer.layoutPreview( preview, layout, classes, 200, 8 );

	assert.ok(
		preview.el.hasClass( classes.join( ' ' ) ),
		'Classes have been added.'
	);
	assert.equal(
		preview.el.css( 'top' ),
		( layout.offset.top - 20 ) + 'px', // - outer height
		'Top is correct.'
	);
	assert.equal(
		preview.el.css( 'left' ),
		layout.offset.left + 'px',
		'Left is correct.'
	);
	assert.notOk(
		preview.el.find( 'image' ).attr( 'clip-path' ),
		'Image clip path is not set.'
	);
} );

QUnit.test( '#layoutPreview - tall preview, has thumbnail, flipped X and Y', function ( assert ) {
	var preview = createPreview( true, true, { height: 200 } ),
		layout = {
			flippedX: true,
			flippedY: true,
			offset: {
				top: 100,
				left: 200
			}
		},
		classes = [ 'some-class', 'another-class' ];

	preview.el.outerHeight = function () {
		return 20;
	};

	renderer.layoutPreview( preview, layout, classes, 200, 8 );

	assert.ok(
		preview.el.hasClass( classes.join( ' ' ) ),
		'Classes have been added.'
	);
	assert.equal(
		preview.el.css( 'top' ),
		( layout.offset.top - 20 ) + 'px', // - outer height
		'Top is correct.'
	);
	assert.equal(
		preview.el.css( 'left' ),
		layout.offset.left + 'px',
		'Left is correct.'
	);
	assert.equal(
		preview.el.find( 'image' ).attr( 'clip-path' ),
		'url(#mwe-popups-landscape-mask-flip)',
		'Image clip path is not set.'
	);
} );

QUnit.test( '#layoutPreview - portrait preview, has thumbnail, flipped X and Y', function ( assert ) {
	var preview = createPreview( false, true, { height: 200 } ),
		layout = {
			flippedX: true,
			flippedY: true,
			offset: {
				top: 100,
				left: 200
			}
		},
		classes = [ 'some-class', 'another-class' ];

	preview.el.outerHeight = function () {
		return 20;
	};

	renderer.layoutPreview( preview, layout, classes, 200, 8 );

	assert.ok(
		preview.el.hasClass( classes.join( ' ' ) ),
		'Classes have been added.'
	);
	assert.equal(
		preview.el.css( 'top' ),
		( layout.offset.top - 20 ) + 'px', // - outer height
		'Top is correct.'
	);
	assert.equal(
		preview.el.css( 'left' ),
		layout.offset.left + 'px',
		'Left is correct.'
	);
	assert.notOk(
		preview.el.find( 'image' ).attr( 'clip-path' ),
		'Image clip path is not set.'
	);
} );

QUnit.test( 'getClosestYPosition', function ( assert ) {
	assert.equal( renderer.getClosestYPosition( 100, [
		{
			top: 99,
			bottom: 119
		},
		{
			top: 120,
			bottom: 140
		}
	] ), 119, 'Correct lower Y.' );

	assert.equal( renderer.getClosestYPosition( 100, [
		{
			top: 99,
			bottom: 119
		},
		{
			top: 120,
			bottom: 140
		}
	], true ), 99, 'Correct upper Y.' );

	assert.equal( renderer.getClosestYPosition( 135, [
		{
			top: 99,
			bottom: 119
		},
		{
			top: 120,
			bottom: 140
		}
	], true ), 120, 'Correct upper Y 2.' );
} );