'use strict';

( function () {
	function createStubTitle( fragment = null ) {
		return {
			getFragment() {
				return fragment;
			}
		};
	}

	( mw.loader.getModuleNames().indexOf( 'ext.popups.main' ) !== -1 ?
		QUnit.module :
		QUnit.module.skip )( 'ext.cite.referencePreviews#createReferenceGateway', {
		beforeEach: function () {
			this.sandbox.stub( mw, 'msg', ( key ) => `<${ key }>` );
			this.sandbox.stub( mw, 'message', ( key ) => ( {
				exists: () => !key.endsWith( 'generic' ),
				text: () => `<${ key }>`
			} ) );

			this.$sourceElement = $( '<a>' ).appendTo(
				$( '<sup>' ).attr( 'id', 'cite_ref-1' ).appendTo( document.body )
			);

			this.$references = $( '<ul>' ).append(
				$( '<li>' ).attr( 'id', 'cite_note-1' ).append(
					$( '<span>' ).addClass( 'mw-reference-text' ).text( 'Footnote 1' )
				),
				$( '<li>' ).attr( 'id', 'cite_note-2' ).append(
					$( '<span>' ).addClass( 'reference-text' ).append(
						$( '<cite>' ).addClass( 'journal web unknown' ).text( 'Footnote 2' )
					)
				),
				$( '<li>' ).attr( 'id', 'cite_note-3' ).append(
					$( '<span>' ).addClass( 'reference-text' ).append(
						$( '<cite>' ).addClass( 'news' ).text( 'Footnote 3' ),
						$( '<cite>' ).addClass( 'news citation' ),
						$( '<cite>' ).addClass( 'citation' )
					)
				),
				$( '<li>' ).attr( 'id', 'cite_note-4' ).append(
					$( '<span>' ).addClass( 'reference-text' ).append(
						$( '<cite>' ).addClass( 'news' ).text( 'Footnote 4' ),
						$( '<cite>' ).addClass( 'web' )
					)
				),
				$( '<li>' ).attr( 'id', 'cite_note-5' ).append(
					$( '<span>' ).addClass( 'mw-reference-text' ).html( '&nbsp;' )
				)
			).appendTo( document.body );
		},
		afterEach() {
			this.$sourceElement.parent().remove();
			this.$references.remove();
		}
	} );

	QUnit.test( 'Reference preview gateway returns the correct data', function ( assert ) {
		const gateway = require( 'ext.cite.referencePreviews' ).private.createReferenceGateway(),
			title = createStubTitle( 'cite note-1' );

		return gateway.fetchPreviewForTitle( title, this.$sourceElement[ 0 ] ).then( ( result ) => {
			assert.propEqual(
				result,
				{
					url: '#cite_note-1',
					extract: 'Footnote 1',
					type: 'reference',
					referenceType: null,
					sourceElementId: 'cite_ref-1'
				}
			);
		} );
	} );

	QUnit.test( 'Reference preview gateway accepts alternative text node class name', function ( assert ) {
		const gateway = require( 'ext.cite.referencePreviews' ).private.createReferenceGateway(),
			title = createStubTitle( 'cite note-2' );

		return gateway.fetchPreviewForTitle( title, this.$sourceElement[ 0 ] ).then( ( result ) => {
			assert.propEqual(
				result,
				{
					url: '#cite_note-2',
					extract: '<cite class="journal web unknown">Footnote 2</cite>',
					type: 'reference',
					referenceType: 'web',
					sourceElementId: 'cite_ref-1'
				}
			);
		} );
	} );

	QUnit.test( 'Reference preview gateway accepts duplicated types', function ( assert ) {
		const gateway = require( 'ext.cite.referencePreviews' ).private.createReferenceGateway(),
			title = createStubTitle( 'cite note-3' );

		return gateway.fetchPreviewForTitle( title, this.$sourceElement[ 0 ] ).then( ( result ) => {
			assert.propEqual(
				result,
				{
					url: '#cite_note-3',
					extract: '<cite class="news">Footnote 3</cite><cite class="news citation"></cite><cite class="citation"></cite>',
					type: 'reference',
					referenceType: 'news',
					sourceElementId: 'cite_ref-1'
				}
			);
		} );
	} );

	QUnit.test( 'Reference preview gateway ignores conflicting types', function ( assert ) {
		const gateway = require( 'ext.cite.referencePreviews' ).private.createReferenceGateway(),
			title = createStubTitle( 'cite note-4' );

		return gateway.fetchPreviewForTitle( title, this.$sourceElement[ 0 ] ).then( ( result ) => {
			assert.propEqual(
				result,
				{
					url: '#cite_note-4',
					extract: '<cite class="news">Footnote 4</cite><cite class="web"></cite>',
					type: 'reference',
					referenceType: 'news',
					sourceElementId: 'cite_ref-1'
				}
			);
		} );
	} );

	QUnit.test( 'Reference preview gateway returns source element id', function ( assert ) {
		const gateway = require( 'ext.cite.referencePreviews' ).private.createReferenceGateway(),
			title = createStubTitle( 'cite note-1' );

		return gateway.fetchPreviewForTitle( title, this.$sourceElement[ 0 ] ).then( ( result ) => {
			assert.propEqual(
				result,
				{
					url: '#cite_note-1',
					extract: 'Footnote 1',
					type: 'reference',
					referenceType: null,
					sourceElementId: 'cite_ref-1'
				}
			);
		} );
	} );

	QUnit.test( 'Reference preview gateway rejects non-existing references', function ( assert ) {
		const gateway = require( 'ext.cite.referencePreviews' ).private.createReferenceGateway(),
			title = createStubTitle( 'undefined' );

		return gateway.fetchPreviewForTitle( title, this.$sourceElement[ 0 ] ).then( () => {
			assert.true( false, 'It should not resolve' );
		} ).catch( ( result ) => {
			assert.propEqual( result, {
				textStatus: 'abort',
				textContext: 'Footnote not found or empty',
				xhr: { readyState: 0 }
			} );
		} );
	} );

	QUnit.test( 'Reference preview gateway rejects all-whitespace references', function ( assert ) {
		const gateway = require( 'ext.cite.referencePreviews' ).private.createReferenceGateway(),
			title = createStubTitle( 'cite note-5' );

		return gateway.fetchPreviewForTitle( title, this.$sourceElement[ 0 ] ).then( () => {
			assert.true( false, 'It should not resolve' );
		} ).catch( ( result ) => {
			assert.propEqual( result, {
				textStatus: 'abort',
				textContext: 'Footnote not found or empty',
				xhr: { readyState: 0 }
			} );
		} );
	} );

	QUnit.test( 'Reference preview gateway is abortable', function ( assert ) {
		const gateway = require( 'ext.cite.referencePreviews' ).private.createReferenceGateway(),
			title = createStubTitle( 'cite note-1' ),
			promise = gateway.fetchPreviewForTitle( title, this.$sourceElement[ 0 ] );

		assert.strictEqual( typeof promise.abort, 'function' );
	} );
}() );