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

QUnit.module( 've.dm.SurfaceFragment' );

/* Tests */

QUnit.test( 'constructor', 8, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface );
	// Default range and autoSelect
	assert.strictEqual( fragment.getSurface(), surface, 'surface reference is stored' );
	assert.strictEqual( fragment.getDocument(), doc, 'document reference is stored' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 0, 0 ), 'range is taken from surface' );
	assert.strictEqual( fragment.willAutoSelect(), true, 'auto select by default' );
	assert.strictEqual( fragment.isNull(), false, 'valid fragment is not null' );
	// Invalid range and autoSelect
	fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( -100, 100 ), 'truthy' );
	assert.equal( fragment.getRange().from, 0, 'range is clamped between 0 and document length' );
	assert.equal( fragment.getRange().to, 61, 'range is clamped between 0 and document length' );
	assert.strictEqual( fragment.willAutoSelect(), false, 'noAutoSelect values are boolean' );
} );

QUnit.test( 'onTransact', 1, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment1 = new ve.dm.SurfaceFragment( surface, new ve.Range( 1, 56 ) ),
		fragment2 = new ve.dm.SurfaceFragment( surface, new ve.Range( 2, 4 ) );
	fragment1.removeContent();
	assert.deepEqual(
		fragment2.getRange(),
		new ve.Range( 1, 1 ),
		'fragment ranges are auto-translated when transactions are processed'
	);
} );

QUnit.test( 'adjustRange', 3, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 20, 21 ) ),
		adjustedFragment = fragment.adjustRange( -19, 35 );
	assert.ok( fragment !== adjustedFragment, 'adjustRange produces a new fragment' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 20, 21 ), 'old fragment is not changed' );
	assert.deepEqual( adjustedFragment.getRange(), new ve.Range( 1, 56 ), 'new range is used' );
} );

QUnit.test( 'collapseRange', 3, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 20, 21 ) ),
		collapsedFragment = fragment.collapseRange();
	assert.ok( fragment !== collapsedFragment, 'collapseRange produces a new fragment' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 20, 21 ), 'old fragment is not changed' );
	assert.deepEqual( collapsedFragment.getRange(), new ve.Range( 20, 20 ), 'new range is used' );
} );

QUnit.test( 'expandRange (closest)', 1, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 20, 21 ) );
	assert.strictEqual(
		fragment.expandRange( 'closest', 'invalid type' ).isNull(),
		true,
		'closest with invalid type results in null fragment'
	);
} );

QUnit.test( 'expandRange (word)', 1, function ( assert ) {
	var i, doc, surface, fragment, newFragment, range, word, cases = [
		{
			phrase: 'the quick brown fox',
			range: new ve.Range( 6, 13 ),
			expected: 'quick brown',
			msg: 'range starting and ending in latin words'
		},
		{
			phrase: 'the quick brown fox',
			range: new ve.Range( 18, 12 ),
			expected: 'brown fox',
			msg: 'backwards range starting and ending in latin words'
		},
		{
			phrase: 'the quick brown fox',
			range: new ve.Range( 7, 7 ),
			expected: 'quick',
			msg: 'zero-length range'
		}
	];
	QUnit.expect( cases.length*2 );
	for ( i = 0; i < cases.length; i++ ) {
		doc = new ve.dm.Document( cases[i].phrase.split('') );
		surface = new ve.dm.Surface( doc );
		fragment = new ve.dm.SurfaceFragment( surface, cases[i].range );
		newFragment = fragment.expandRange( 'word' );
		range = newFragment.getRange();
		word = cases[i].phrase.substring( range.start, range.end );
		assert.strictEqual( word, cases[i].expected, cases[i].msg + ': text' );
		assert.strictEqual( cases[i].range.isBackwards(), range.isBackwards(), cases[i].msg + ': range direction' );
	}
} );

QUnit.test( 'removeContent', 2, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 1, 56 ) ),
		expectedData = ve.copyArray( ve.dm.example.data.slice( 0, 1 ) )
			.concat( ve.copyArray( ve.dm.example.data.slice( 4, 5 ) ) )
			.concat( ve.copyArray( ve.dm.example.data.slice( 55 ) ) );
	ve.setProp( expectedData[0], 'internal', 'changed', 'content', 1 );
	fragment.removeContent();
	assert.deepEqual(
		doc.getData(),
		expectedData,
		'removing content drops fully covered nodes and strips partially covered ones'
	);
	assert.deepEqual(
		fragment.getRange(),
		new ve.Range( 1, 1 ),
		'removing content results in a zero-length fragment'
	);
} );

QUnit.test( 'insertContent', 3, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 1, 4 ) );
	fragment.insertContent( ['1', '2', '3'] );
	assert.deepEqual(
		doc.getData( new ve.Range( 1, 4 ) ),
		['1', '2', '3'],
		'inserting content replaces selection with new content'
	);
	assert.deepEqual(
		fragment.getRange(),
		new ve.Range( 4, 4 ),
		'inserting content results in a zero-length fragment'
	);
	fragment.insertContent( '321' );
	assert.deepEqual(
		doc.getData( new ve.Range( 4, 7 ) ),
		['3', '2', '1'],
		'strings get converted into data when inserting content'
	);
} );

QUnit.test( 'wrapNodes/unwrapNodes', 10, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		originalDoc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 55, 61 ) );

	// Make 2 paragraphs into 2 lists of 1 item each
	fragment.wrapNodes(
		[{ 'type': 'list', 'attributes': { 'style': 'bullet' } }, { 'type': 'listItem' }]
	);
	assert.deepEqual(
		doc.getData( new ve.Range( 55, 69 ) ),
		[
			{
				'type': 'list',
				'attributes': { 'style': 'bullet' },
				'internal': { 'changed': { 'created': 1 } }
			},
			{ 'type': 'listItem', 'internal': { 'changed': { 'created': 1 } } },
			{ 'type': 'paragraph' },
			'l',
			{ 'type': '/paragraph' },
			{ 'type': '/listItem' },
			{ 'type': '/list' },
			{
				'type': 'list',
				'attributes': { 'style': 'bullet' },
				'internal': { 'changed': { 'created': 1 } }
			},
			{ 'type': 'listItem', 'internal': { 'changed': { 'created': 1 } } },
			{ 'type': 'paragraph' },
			'm',
			{ 'type': '/paragraph' },
			{ 'type': '/listItem' },
			{ 'type': '/list' }
		],
		'wrapping nodes can add multiple levels of wrapping to multiple elements'
	);
	assert.deepEqual( fragment.getRange(), new ve.Range( 55, 69 ), 'new range contains wrapping elements' );

	fragment.unwrapNodes( 0, 2 );
	assert.deepEqual( doc.getData(), originalDoc.getData(), 'unwrapping 2 levels restores document to original state' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 55, 61 ), 'range after unwrapping is same as original range' );

	// Make a 1 paragraph into 1 list with 1 item
	fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 9, 12 ) );
	fragment.wrapNodes(
		[{ 'type': 'list', 'attributes': { 'style': 'bullet' } }, { 'type': 'listItem' }]
	);
	assert.deepEqual(
		doc.getData( new ve.Range( 9, 16 ) ),
		[
			{
				'type': 'list',
				'attributes': { 'style': 'bullet' },
				'internal': { 'changed': { 'created': 1 } }
			},
			{ 'type': 'listItem', 'internal': { 'changed': { 'created': 1 } } },
			{ 'type': 'paragraph' },
			'd',
			{ 'type': '/paragraph' },
			{ 'type': '/listItem' },
			{ 'type': '/list' }
		],
		'wrapping nodes can add multiple levels of wrapping to a single element'
	);
	assert.deepEqual( fragment.getRange(), new ve.Range( 9, 16 ), 'new range contains wrapping elements' );

	fragment.unwrapNodes( 0, 2 );
	assert.deepEqual( doc.getData(), originalDoc.getData(), 'unwrapping 2 levels restores document to original state' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 9, 12 ), 'range after unwrapping is same as original range' );

	fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 8, 34 ) );
	fragment.unwrapNodes( 3, 1 );
	assert.deepEqual( fragment.getData(), doc.getData( new ve.Range( 5, 29 ) ), 'unwrapping multiple outer nodes and an inner node' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 5, 29 ), 'new range contains inner elements' );

} );

QUnit.test( 'rewrapNodes', 4, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 43, 55 ) ),
		expectedDoc = ve.dm.example.createExampleDocument(),
		expectedSurface = new ve.dm.Surface( expectedDoc ),
		expectedFragment = new ve.dm.SurfaceFragment( expectedSurface, new ve.Range( 43, 55 ) ),
		created = { 'changed': { 'created': 1 } },
		expectedData;

	// set up wrapped nodes in example document
	fragment.wrapNodes(
		[{ 'type': 'list', 'attributes': { 'style': 'bullet' } }, { 'type': 'listItem' }]
	);
	expectedFragment.wrapNodes(
		[{ 'type': 'list', 'attributes': { 'style': 'bullet' } }, { 'type': 'listItem' }]
	);
	// range is now 43, 59

	// Compare a rewrap operation with its equivalent unwrap + wrap
	// This type of test can only exist if the intermediate state is valid
	fragment.rewrapNodes(
		2,
		[{ 'type': 'definitionList' }, { 'type': 'definitionListItem', 'attributes': { 'style': 'term' } }]
	);
	expectedFragment.unwrapNodes( 0, 2 );
	expectedFragment.wrapNodes(
		[{ 'type': 'definitionList' }, { 'type': 'definitionListItem', 'attributes': { 'style': 'term' } }]
	);

	assert.deepEqual(
		doc.getData(),
		expectedDoc.getData(),
		'rewrapping multiple nodes via a valid intermediate state produces the same document as unwrapping then wrapping'
	);
	assert.deepEqual( fragment.getRange(), expectedFragment.getRange(), 'new range contains rewrapping elements' );

	// Rewrap paragrphs as headings
	// The intermediate stage (plain text attached to the document) would be invalid
	// if performed as an unwrap and a wrap
	expectedData = ve.copyArray( doc.getData() );

	fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 59, 65 ) );
	fragment.rewrapNodes( 1, [ { 'type': 'heading', 'attributes': { 'level': 1 } } ] );

	expectedData.splice( 59, 1, { 'type': 'heading', 'attributes': { 'level': 1 }, 'internal': created } );
	expectedData.splice( 61, 1, { 'type': '/heading' } );
	expectedData.splice( 62, 1, { 'type': 'heading', 'attributes': { 'level': 1 }, 'internal': created } );
	expectedData.splice( 64, 1, { 'type': '/heading' } );

	assert.deepEqual( doc.getData(), expectedData, 'rewrapping paragraphs as headings' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 59, 65 ), 'new range contains rewrapping elements' );
} );

QUnit.test( 'wrapAllNodes', 10, function ( assert ) {
	var doc = ve.dm.example.createExampleDocument(),
		originalDoc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 55, 61 ) ),
		expectedData = ve.copyArray( doc.getData() );

	// Make 2 paragraphs into 1 lists of 1 item with 2 paragraphs
	fragment.wrapAllNodes(
		[{ 'type': 'list', 'attributes': { 'style': 'bullet' } }, { 'type': 'listItem' }]
	);
	assert.deepEqual(
		doc.getData( new ve.Range( 55, 65 ) ),
		[
			{
				'type': 'list',
				'attributes': { 'style': 'bullet' },
				'internal': { 'changed': { 'created': 1 } }
			},
			{ 'type': 'listItem', 'internal': { 'changed': { 'created': 1 } } },
			{ 'type': 'paragraph' },
			'l',
			{ 'type': '/paragraph' },
			{ 'type': 'paragraph' },
			'm',
			{ 'type': '/paragraph' },
			{ 'type': '/listItem' },
			{ 'type': '/list' }
		],
		'wrapping nodes can add multiple levels of wrapping to multiple elements'
	);
	assert.deepEqual( fragment.getRange(), new ve.Range( 55, 65 ), 'new range contains wrapping elements' );

	fragment.unwrapNodes( 0, 2 );
	assert.deepEqual( doc.getData(), originalDoc.getData(), 'unwrapping 2 levels restores document to original state' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 55, 61 ), 'range after unwrapping is same as original range' );

	// Make a 1 paragraph into 1 list with 1 item
	fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 9, 12 ) );
	fragment.wrapAllNodes(
		[{ 'type': 'list', 'attributes': { 'style': 'bullet' } }, { 'type': 'listItem' }]
	);
	assert.deepEqual(
		doc.getData( new ve.Range( 9, 16 ) ),
		[
			{
				'type': 'list',
				'attributes': { 'style': 'bullet' },
				'internal': { 'changed': { 'created': 1 } }
			},
			{ 'type': 'listItem', 'internal': { 'changed': { 'created': 1 } } },
			{ 'type': 'paragraph' },
			'd',
			{ 'type': '/paragraph' },
			{ 'type': '/listItem' },
			{ 'type': '/list' }
		],
		'wrapping nodes can add multiple levels of wrapping to a single element'
	);
	assert.deepEqual( fragment.getRange(), new ve.Range( 9, 16 ), 'new range contains wrapping elements' );

	fragment.unwrapNodes( 0, 2 );
	assert.deepEqual( doc.getData(), originalDoc.getData(), 'unwrapping 2 levels restores document to original state' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 9, 12 ), 'range after unwrapping is same as original range' );

	fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 5, 37 ) );

	assert.throws( function() {
		fragment.unwrapNodes( 0, 20 );
	}, /cannot unwrap by greater depth/, 'error thrown trying to unwrap more nodes that it is possible to contain' );

	expectedData.splice( 5, 4 );
	expectedData.splice( 29, 4 );
	fragment.unwrapNodes( 0, 4 );
	assert.deepEqual(
		doc.getData(),
		expectedData,
		'unwrapping 4 levels (table, tableSection, tableRow and tableCell)'
	);
} );

QUnit.test( 'rewrapAllNodes', 6, function ( assert ) {
	var expectedData,
		doc = ve.dm.example.createExampleDocument(),
		originalDoc = ve.dm.example.createExampleDocument(),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 5, 37 ) ),
		expectedDoc = ve.dm.example.createExampleDocument(),
		expectedSurface = new ve.dm.Surface( expectedDoc ),
		expectedFragment = new ve.dm.SurfaceFragment( expectedSurface, new ve.Range( 5, 37 ) ),
		created = { 'changed': { 'created' : 1 } };

	// Compare a rewrap operation with its equivalent unwrap + wrap
	// This type of test can only exist if the intermediate state is valid
	fragment.rewrapAllNodes(
		4,
		[{ 'type': 'list', 'attributes': { 'style': 'bullet' } }, { 'type': 'listItem' }]
	);
	expectedFragment.unwrapNodes( 0, 4 );
	expectedFragment.wrapAllNodes(
		[{ 'type': 'list', 'attributes': { 'style': 'bullet' } }, { 'type': 'listItem' }]
	);
	assert.deepEqual(
		doc.getData(),
		expectedDoc.getData(),
		'rewrapping multiple nodes via a valid intermediate state produces the same document as unwrapping then wrapping'
	);
	assert.deepEqual( fragment.getRange(), expectedFragment.getRange(), 'new range contains rewrapping elements' );

	// Reverse of first test
	fragment.rewrapAllNodes(
		2,
		[
			{ 'type': 'table', },
			{ 'type': 'tableSection', 'attributes': { 'style': 'body' } },
			{ 'type': 'tableRow' },
			{ 'type': 'tableCell', 'attributes': { 'style': 'data' } }
		]
	);

	expectedData = originalDoc.getData();
	expectedData[5].internal = created;
	expectedData[6].internal = created;
	expectedData[7].internal = created;
	expectedData[8].internal = created;
	assert.deepEqual(
		doc.getData(),
		expectedData,
		'rewrapping multiple nodes via a valid intermediate state produces the same document as unwrapping then wrapping'
	);
	assert.deepEqual( fragment.getRange(), new ve.Range( 5, 37 ), 'new range contains rewrapping elements' );

	// Rewrap a heading as a paragraph
	// The intermediate stage (plain text attached to the document) would be invalid
	// if performed as an unwrap and a wrap
	fragment = new ve.dm.SurfaceFragment( surface, new ve.Range( 0, 5 ) );
	fragment.rewrapAllNodes( 1, [ { 'type': 'paragraph' } ] );

	expectedData.splice( 0, 1, { 'type': 'paragraph', 'internal': created } );
	expectedData.splice( 4, 1, { 'type': '/paragraph' } );

	assert.deepEqual( doc.getData(), expectedData, 'rewrapping a heading as a paragraph' );
	assert.deepEqual( fragment.getRange(), new ve.Range( 0, 5 ), 'new range contains rewrapping elements' );
} );

function runIsolateTest( assert, type, range, expected, label ) {
	var doc = ve.dm.example.createExampleDocument( 'isolationData' ),
		surface = new ve.dm.Surface( doc ),
		fragment = new ve.dm.SurfaceFragment( surface, range ),
		data;

	data = ve.copyArray( doc.getFullData() );
	fragment.isolateAndUnwrap( type );
	expected( data );

	assert.deepEqual( doc.getFullData(), data, label );
}

QUnit.test( 'isolateAndUnwrap', 4, function ( assert ) {
	var rebuilt = { 'changed': { 'rebuilt': 1 } },
		createdAndRebuilt = { 'changed': { 'created': 1, 'rebuilt': 1 } };

	runIsolateTest( assert, 'MWheading', new ve.Range( 12, 20 ), function( data ) {
		data[0].internal = rebuilt;
		data.splice( 11, 0, { 'type': '/list' } );
		data.splice( 12, 1 );
		data.splice( 20, 1, { 'type': 'list', 'attributes': { 'style': 'bullet' }, 'internal': createdAndRebuilt });
	}, 'isolating paragraph in list item "Item 2" for MWheading');

	runIsolateTest( assert, 'heading', new ve.Range( 12, 20 ), function( data ) {
		data.splice( 11, 0, { 'type': 'listItem' } );
		data.splice( 12, 1 );
		data.splice( 20, 1, { 'type': '/listItem' });
	}, 'isolating paragraph in list item "Item 2" for heading');

	runIsolateTest( assert, 'MWheading', new ve.Range( 89, 97 ), function( data ) {
		data[75].internal = rebuilt;
		data[76].internal = rebuilt;
		data[77].internal = rebuilt;
		data.splice( 88, 1,
			{ 'type': '/tableRow' },
			{ 'type': '/tableSection' },
			{ 'type': '/table' }
		);
		data.splice( 99, 1,
			{ 'type': 'table', 'internal': createdAndRebuilt },
			{ 'type': 'tableSection', 'attributes': { 'style': 'body' }, 'internal': createdAndRebuilt },
			{ 'type': 'tableRow', 'internal': createdAndRebuilt }
		);
	}, 'isolating "Cell 2" for MWheading');

	runIsolateTest( assert, 'MWheading', new ve.Range( 202, 212 ), function( data ) {
		data[186].internal = rebuilt;
		data[187].internal = rebuilt;
		data[188].internal = rebuilt;
		data.splice( 201, 1,
			{ 'type': '/list' }, { 'type': '/listItem' }, { 'type': '/list' }
		);
		data.splice( 214, 1,
			{ 'type': 'list', 'attributes': { 'style': 'bullet' }, 'internal': createdAndRebuilt },
			{ 'type': 'listItem', 'internal': createdAndRebuilt },
			{ 'type': 'list', 'attributes': { 'style': 'number' }, 'internal': createdAndRebuilt }
		);
	}, 'isolating paragraph in list item "Nested 2" for MWheading');
} );