/*!
 * VisualEditor ContentEditable Surface tests.
 *
 * @copyright 2011-2013 VisualEditor Team and others; see AUTHORS.txt
 * @license The MIT License (MIT); see LICENSE.txt
 */

QUnit.module( 've.ce.Surface' );

/* Tests */

ve.test.utils.runSurfaceHandleDeleteTest = function( assert, html, range, operations, expectedData, expectedRange, msg ) {
	var i, args,
		selection,
		deleteArgs = {
			'backspace': [ {}, true ],
			'delete': [ {}, false ],
			'modifiedBackspace': [ { 'ctrlKey': true }, true ],
			'modifiedDelete': [ { 'ctrlKey': true }, false ]
		},
		surface = ve.test.utils.createSurfaceFromHtml( html || ve.dm.example.html ),
		view = surface.getView(),
		model = surface.getModel(),
		data = ve.copy( model.getDocument().getFullData() );

	// TODO: model.getSelection() should be consistent after it has been
	// changed but appears to behave differently depending on the browser.
	// The selection from the select event is still consistent.
	selection = range;
	model.on( 'select', function( s ) {
		selection = s;
	} );

	model.setSelection( range );
	for ( i = 0; i < operations.length; i++ ) {
		args = deleteArgs[operations[i]];
		view.handleDelete( args[0], args[1] );
	}
	expectedData( data );

	assert.deepEqualWithDomElements( model.getDocument().getFullData(), data, msg + ': data' );
	assert.deepEqual( selection, expectedRange, msg + ': range' );
	surface.destroy();
};

QUnit.test( 'handleDelete', function ( assert ) {
	var i,
		cases = [
			{
				'range': new ve.Range( 2 ),
				'operations': ['backspace'],
				'expectedData': function ( data ) {
					data.splice( 1, 1 );
				},
				'expectedRange': new ve.Range( 1 ),
				'msg': 'Character deleted by backspace'
			},
			{
				'range': new ve.Range( 2 ),
				'operations': ['delete'],
				'expectedData': function ( data ) {
					data.splice( 2, 1 );
				},
				'expectedRange': new ve.Range( 2 ),
				'msg': 'Character deleted by delete'
			},
			{
				'range': new ve.Range( 1, 4 ),
				'operations': ['backspace'],
				'expectedData': function ( data ) {
					data.splice( 1, 3 );
				},
				'expectedRange': new ve.Range( 1 ),
				'msg': 'Selection deleted by backspace'
			},
			{
				'range': new ve.Range( 1, 4 ),
				'operations': ['delete'],
				'expectedData': function ( data ) {
					data.splice( 1, 3 );
				},
				'expectedRange': new ve.Range( 1 ),
				'msg': 'Selection deleted by delete'
			},
			{
				'range': new ve.Range( 4 ),
				'operations': ['modifiedBackspace'],
				'expectedData': function ( data ) {
					data.splice( 1, 3 );
				},
				'expectedRange': new ve.Range( 1 ),
				'msg': 'Whole word deleted by modified backspace'
			},
			{
				'range': new ve.Range( 1 ),
				'operations': ['modifiedDelete'],
				'expectedData': function ( data ) {
					data.splice( 1, 3 );
				},
				'expectedRange': new ve.Range( 1 ),
				'msg': 'Whole word deleted by modified delete'
			},
			{
				'range': new ve.Range( 1, 4 ),
				'operations': ['delete', 'delete'],
				'expectedData': function ( data ) {
					data.splice( 0, 5 );
				},
				'expectedRange': new ve.Range( 1 ),
				'msg': 'Empty node deleted by delete'
			},
			{
				'range': new ve.Range( 41 ),
				'operations': ['backspace'],
				'expectedData': function () {},
				'expectedRange': new ve.Range( 39, 41 ),
				'msg': 'Focusable node selected but not deleted by backspace'
			},
			{
				'range': new ve.Range( 39 ),
				'operations': ['delete'],
				'expectedData': function () {},
				'expectedRange': new ve.Range( 39, 41 ),
				'msg': 'Focusable node selected but not deleted by delete'
			},
			{
				'range': new ve.Range( 39, 41 ),
				'operations': ['delete'],
				'expectedData': function ( data ) {
					data.splice( 39, 2 );
				},
				'expectedRange': new ve.Range( 39 ),
				'msg': 'Focusable node deleted if selected first'
			}
		];

	QUnit.expect( cases.length * 2 );

	for ( i = 0; i < cases.length; i++ ) {
		ve.test.utils.runSurfaceHandleDeleteTest(
			assert, cases[i].html, cases[i].range, cases[i].operations,
			cases[i].expectedData, cases[i].expectedRange, cases[i].msg
		);
	}
} );

QUnit.test( 'onContentChange', function ( assert ) {
	var i,
		cases = [
			{
				'prevHtml': '<p></p>',
				'prevRange': new ve.Range( 1 ),
				'nextHtml': '<p>A</p>',
				'nextRange': new ve.Range( 2 ),
				'expectedOps': [
					[
						{ 'type': 'retain', 'length': 1 },
						{
							'type': 'replace',
							'insert': [ 'A' ],
							'remove': []
						},
						{ 'type': 'retain', 'length': 3 }
					]
				],
				'msg': 'Simple insertion into empty paragraph'
			},
			{
				'prevHtml': '<p>A</p>',
				'prevRange': new ve.Range( 1, 2 ),
				'nextHtml': '<p>B</p>',
				'nextRange': new ve.Range( 2 ),
				'expectedOps': [
					[
						{ 'type': 'retain', 'length': 1 },
						{
							'type': 'replace',
							'insert': [ 'B' ],
							'remove': []
						},
						{ 'type': 'retain', 'length': 4 }
					],
					[
						{ 'type': 'retain', 'length': 2 },
						{
							'type': 'replace',
							'insert': [],
							'remove': [ 'A' ]
						},
						{ 'type': 'retain', 'length': 3 }
					]
				],
				'msg': 'Simple replace'
			},
			{
				'prevHtml': '<p><a href="Foo">A</a><a href="Bar">FooX?</a></p>',
				'prevRange': new ve.Range( 5, 6 ),
				'nextHtml': '<p><a href="Foo">A</a><a href="Bar">FooB?</a></p>',
				'nextRange': new ve.Range( 6 ),
				'expectedOps': [
					[
						{ 'type': 'retain', 'length': 5 },
						{
							'type': 'replace',
							'insert': [ ['B', [1]] ],
							'remove': []
						},
						{ 'type': 'retain', 'length': 5 }
					],
					[
						{ 'type': 'retain', 'length': 6 },
						{
							'type': 'replace',
							'insert': [],
							'remove': [ ['X', [1]] ]
						},
						{ 'type': 'retain', 'length': 4 }
					]
				],
				'msg': 'Replace into non-zero annotation next to word break'
			}
		];

	QUnit.expect( cases.length * 2 );

	function testRunner( prevHtml, prevRange, nextHtml, nextRange, expectedOps, expectedRange, msg ) {
		var txs, i, ops,
			surface = ve.test.utils.createSurfaceFromHtml( prevHtml ),
			view = surface.getView().getDocument().getDocumentNode().children[0],
			prevNode = $( prevHtml )[0],
			nextNode = $( nextHtml )[0],
			prev = {
				'text': ve.ce.getDomText( prevNode ),
				'hash': ve.ce.getDomHash( prevNode ),
				'range': prevRange
			},
			next = {
				'text': ve.ce.getDomText( nextNode ),
				'hash': ve.ce.getDomHash( nextNode ),
				'range': nextRange
			};

		surface.getView().onContentChange( view, prev, next );
		txs = surface.getModel().getHistory()[0].stack;
		ops = [];
		for ( i = 0; i < txs.length; i++ ) {
			ops.push( txs[i].getOperations() );
		}
		assert.deepEqual( ops, expectedOps, msg + ': operations' );
		assert.deepEqual( surface.getModel().getSelection(), expectedRange, msg + ': range' );

		surface.destroy();
	}

	for ( i = 0; i < cases.length; i++ ) {
		testRunner(
			cases[i].prevHtml, cases[i].prevRange, cases[i].nextHtml, cases[i].nextRange,
			cases[i].expectedOps, cases[i].expectedRange || cases[i].nextRange, cases[i].msg
		);
	}

} );

/* Methods with return values */
// TODO: ve.ce.Surface.static.getClipboardHash
// TODO: ve.ce.Surface#hasSlugAtOffset
// TODO: ve.ce.Surface#getClickCount
// TODO: ve.ce.Surface#needsPawn
// TODO: ve.ce.Surface#getSurface
// TODO: ve.ce.Surface#getModel
// TODO: ve.ce.Surface#getDocument
// TODO: ve.ce.Surface#getFocusedNode
// TODO: ve.ce.Surface#isRenderingLocked
// TODO: ve.ce.Surface#getDir

/* Methods without return values */
// TODO: ve.ce.Surface#getSelectionRect
// TODO: ve.ce.Surface#initialize
// TODO: ve.ce.Surface#enable
// TODO: ve.ce.Surface#disable
// TODO: ve.ce.Surface#destroy
// TODO: ve.ce.Surface#focus
// TODO: ve.ce.Surface#documentOnFocus
// TODO: ve.ce.Surface#documentOnBlur
// TODO: ve.ce.Surface#onDocumentMouseDown
// TODO: ve.ce.Surface#onDocumentMouseUp
// TODO: ve.ce.Surface#onDocumentMouseMove
// TODO: ve.ce.Surface#onDocumentDragOver
// TODO: ve.ce.Surface#onDocumentDrop
// TODO: ve.ce.Surface#onDocumentKeyDown
// TODO: ve.ce.Surface#onDocumentKeyPress
// TODO: ve.ce.Surface#afterDocumentKeyPress
// TODO: ve.ce.Surface#onDocumentKeyUp
// TODO: ve.ce.Surface#onCut
// TODO: ve.ce.Surface#onCopy
// TODO: ve.ce.Surface#onPaste
// TODO: ve.ce.Surface#beforePaste
// TODO: ve.ce.Surface#afterPaste
// TODO: ve.ce.Surface#onDocumentCompositionEnd
// TODO: ve.ce.Surface#onChange
// TODO: ve.ce.Surface#onSelectionChange
// TODO: ve.ce.Surface#onLock
// TODO: ve.ce.Surface#onUnlock
// TODO: ve.ce.Surface#startRelocation
// TODO: ve.ce.Surface#endRelocation
// TODO: ve.ce.Surface#handleLeftOrRightArrowKey
// TODO: ve.ce.Surface#handleUpOrDownArrowKey
// TODO: ve.ce.Surface#handleInsertion
// TODO: ve.ce.Surface#handleEnter
// TODO: ve.ce.Surface#handleDelete
// TODO: ve.ce.Surface#showSelection
// TODO: ve.ce.Surface#replacePhantoms
// TODO: ve.ce.Surface#replaceHighlight
// TODO: ve.ce.Surface#getNearestCorrectOffset
// TODO: ve.ce.Surface#incRenderLock
// TODO: ve.ce.Surface#decRenderLock