/*!
 * VisualEditor MediaWiki Initialization Target class.
 *
 * @copyright 2011-2016 VisualEditor Team and others; see AUTHORS.txt
 * @license The MIT License (MIT); see LICENSE.txt
 */

/**
 * Initialization MediaWiki target.
 *
 * @class
 * @extends ve.init.Target
 *
 * @constructor
 * @param {Object} [config] Configuration options
 */
ve.init.mw.Target = function VeInitMwTarget( config ) {
	// Parent constructor
	ve.init.mw.Target.super.call( this, config );

	this.generateCitationFeatures();

	// Initialization
	this.$element.addClass( 've-init-mw-target' );
};

/* Inheritance */

OO.inheritClass( ve.init.mw.Target, ve.init.Target );

/* Events */

/**
 * @event surfaceReady
 */

/* Static Properties */

ve.init.mw.Target.static.citationToolsLimit = 5;

ve.init.mw.Target.static.toolbarGroups = [
	// History
	{ include: [ 'undo', 'redo' ] },
	// Format
	{
		classes: [ 've-test-toolbar-format' ],
		type: 'menu',
		indicator: 'down',
		title: OO.ui.deferMsg( 'visualeditor-toolbar-format-tooltip' ),
		include: [ { group: 'format' } ],
		promote: [ 'paragraph' ],
		demote: [ 'preformatted', 'blockquote', 'heading1' ]
	},
	// Style
	{
		classes: [ 've-test-toolbar-style' ],
		type: 'list',
		icon: 'textStyle',
		indicator: 'down',
		title: OO.ui.deferMsg( 'visualeditor-toolbar-style-tooltip' ),
		include: [ { group: 'textStyle' }, 'language', 'clear' ],
		forceExpand: [ 'bold', 'italic', 'clear' ],
		promote: [ 'bold', 'italic' ],
		demote: [ 'strikethrough', 'code', 'underline', 'language', 'clear' ]
	},
	// Link
	{ include: [ 'link' ] },
	// Cite
	{
		classes: [ 've-test-toolbar-cite' ],
		type: 'list',
		label: OO.ui.deferMsg( 'visualeditor-toolbar-cite-label' ),
		indicator: 'down',
		include: [ { group: 'cite' }, 'reference', 'reference/existing' ],
		demote: [ 'reference', 'reference/existing' ]
	},
	// Structure
	{
		classes: [ 've-test-toolbar-structure' ],
		type: 'list',
		icon: 'listBullet',
		indicator: 'down',
		include: [ { group: 'structure' } ],
		demote: [ 'outdent', 'indent' ]
	},
	// Insert
	{
		classes: [ 've-test-toolbar-insert' ],
		label: OO.ui.deferMsg( 'visualeditor-toolbar-insert' ),
		indicator: 'down',
		include: '*',
		forceExpand: [ 'media', 'transclusion', 'insertTable' ],
		promote: [ 'media', 'transclusion', 'insertTable' ]
	},
	// Table
	{
		header: OO.ui.deferMsg( 'visualeditor-toolbar-table' ),
		type: 'list',
		icon: 'table',
		indicator: 'down',
		include: [ { group: 'table' } ],
		demote: [ 'deleteTable' ]
	},
	// SpecialCharacter
	{ include: [ 'specialCharacter' ] }
];

ve.init.mw.Target.static.importRules = {
	external: {
		blacklist: [
			// Annotations
			'link', 'textStyle/span', 'textStyle/font', 'textStyle/underline', 'meta/language',
			// Nodes
			'div', 'alienInline', 'alienBlock', 'comment'
		],
		removeOriginalDomElements: true
	},
	all: null
};

/**
 * Type of integration. Used by ve.init.mw.trackSubscriber.js for event tracking.
 *
 * @static
 * @property {string}
 * @inheritable
 */
ve.init.mw.Target.static.integrationType = null;

/**
 * Type of platform. Used by ve.init.mw.trackSubscriber.js for event tracking.
 *
 * @static
 * @property {string}
 * @inheritable
 */
ve.init.mw.Target.static.platformType = null;

/* Static Methods */

/**
 * Fix the base URL from Parsoid if necessary.
 *
 * Absolutizes the base URL if it's relative, and sets a base URL based on wgArticlePath
 * if there was no base URL at all.
 *
 * @param {HTMLDocument} doc Parsoid document
 */
ve.init.mw.Target.static.fixBase = function ( doc ) {
	ve.fixBase( doc, document, ve.resolveUrl(
		// Don't replace $1 with the page name, because that'll break if
		// the page name contains a slash
		mw.config.get( 'wgArticlePath' ).replace( '$1', '' ),
		document
	) );
};

/* Methods */

/**
 * Parse HTML into a document
 *
 * @param {string} html HTML
 * @return {HTMLDocument} HTML document
 */
ve.init.mw.Target.prototype.parseHtml = function ( html ) {
	var doc = ve.parseXhtml( html );

	// Fix relative or missing base URL if needed
	this.constructor.static.fixBase( doc );

	return doc;
};

/**
 * Handle both DOM and modules being loaded and ready.
 *
 * @param {HTMLDocument} doc HTML document
 */
ve.init.mw.Target.prototype.documentReady = function ( doc ) {
	this.setupSurface( doc, this.surfaceReady.bind( this ) );
};

/**
 * Once surface is ready ready, initialize the UI
 *
 * @method
 * @fires surfaceReady
 */
ve.init.mw.Target.prototype.surfaceReady = function () {
	this.emit( 'surfaceReady' );
};

/**
 * Add reference insertion tools from on-wiki data.
 *
 * By adding a definition in JSON to MediaWiki:Visualeditor-cite-tool-definition, the cite menu can
 * be populated with tools that create references containing a specific templates. The content of the
 * definition should be an array containing a series of objects, one for each tool. Each object must
 * contain a `name`, `icon` and `template` property. An optional `title` property can also be used
 * to define the tool title in plain text. The `name` property is a unique identifier for the tool,
 * and also provides a fallback title for the tool by being transformed into a message key. The name
 * is prefixed with `visualeditor-cite-tool-name-`, and messages can be defined on Wiki. Some common
 * messages are pre-defined for tool names such as `web`, `book`, `news` and `journal`.
 *
 * Example:
 * [ { "name": "web", "icon": "cite-web", "template": "Cite web" }, ... ]
 *
 */
ve.init.mw.Target.prototype.generateCitationFeatures = function () {
	var i, len, item, name, data, tool, tools, dialog, contextItem,
		limit = this.constructor.static.citationToolsLimit;

	if ( !ve.ui.MWCitationDialog ) {
		// Citation module isn't loaded, so skip this
		return;
	}

	/*jshint loopfunc:true */

	try {
		// Must use mw.message to avoid JSON being parsed as Wikitext
		tools = JSON.parse( mw.message( 'visualeditor-cite-tool-definition.json' ).plain() );
	} catch ( e ) { }

	if ( Array.isArray( tools ) ) {
		for ( i = 0, len = Math.min( limit, tools.length ); i < len; i++ ) {
			item = tools[ i ];
			data = { template: item.template };

			// Generate citation tool
			name = 'cite-' + item.name;
			if ( !ve.ui.toolFactory.lookup( name ) ) {
				tool = function GeneratedMWCitationDialogTool( toolbar, config ) {
					ve.ui.MWCitationDialogTool.call( this, toolbar, config );
				};
				OO.inheritClass( tool, ve.ui.MWCitationDialogTool );
				tool.static.group = 'cite';
				tool.static.name = name;
				tool.static.icon = item.icon;
				tool.static.title = item.title;
				tool.static.commandName = name;
				tool.static.template = item.template;
				tool.static.autoAddToCatchall = false;
				tool.static.autoAddToGroup = true;
				tool.static.associatedWindows = [ name ];
				ve.ui.toolFactory.register( tool );
				ve.ui.commandRegistry.register(
					new ve.ui.Command(
						name, 'mwcite', 'open', { args: [ name, data ], supportedSelections: [ 'linear' ] }
					)
				);
			}

			// Generate citation context item
			if ( !ve.ui.contextItemFactory.lookup( name ) ) {
				contextItem = function GeneratedMWCitationContextItem( toolbar, config ) {
					ve.ui.MWCitationContextItem.call( this, toolbar, config );
				};
				OO.inheritClass( contextItem, ve.ui.MWCitationContextItem );
				contextItem.static.name = name;
				contextItem.static.icon = item.icon;
				contextItem.static.label = item.title;
				contextItem.static.commandName = name;
				contextItem.static.template = item.template;
				ve.ui.contextItemFactory.register( contextItem );
			}

			// Generate dialog
			if ( !ve.ui.windowFactory.lookup( name ) ) {
				dialog = function GeneratedMWCitationDialog( config ) {
					ve.ui.MWCitationDialog.call( this, config );
				};
				OO.inheritClass( dialog, ve.ui.MWCitationDialog );
				dialog.static.name = name;
				dialog.static.icon = item.icon;
				dialog.static.title = item.title;
				ve.ui.windowFactory.register( dialog );
			}
		}
	}
};

/**
 * Get HTML to send to Parsoid. This takes a document generated by the converter and
 * transplants the head tag from the old document into it, as well as the attributes on the
 * html and body tags.
 *
 * @param {HTMLDocument} newDoc Document generated by ve.dm.Converter. Will be modified.
 * @param {HTMLDocument} [oldDoc] Old document to copy attributes from.
 * @return {string} Full HTML document
 */
ve.init.mw.Target.prototype.getHtml = function ( newDoc, oldDoc ) {
	var i, len;

	function copyAttributes( from, to ) {
		var i, len;
		for ( i = 0, len = from.attributes.length; i < len; i++ ) {
			to.setAttribute( from.attributes[ i ].name, from.attributes[ i ].value );
		}
	}

	if ( oldDoc ) {
		// Copy the head from the old document
		for ( i = 0, len = oldDoc.head.childNodes.length; i < len; i++ ) {
			newDoc.head.appendChild( oldDoc.head.childNodes[ i ].cloneNode( true ) );
		}
		// Copy attributes from the old document for the html, head and body
		copyAttributes( oldDoc.documentElement, newDoc.documentElement );
		copyAttributes( oldDoc.head, newDoc.head );
		copyAttributes( oldDoc.body, newDoc.body );
	}

	// Filter out junk that may have been added by browser plugins
	$( newDoc )
		.find(
			'script, ' + // T54884, T65229, T96533, T103430
			'object, ' + // T65229
			'style, ' + // T55252
			'embed, ' + // T53521, T54791, T65121
			'div[id="myEventWatcherDiv"], ' + // T53423
			'div[id="sendToInstapaperResults"], ' + // T63776
			'div[id="kloutify"], ' + // T69006
			'div[id^="mittoHidden"]' // T70900
		)
		.remove();
	// Add doctype manually
	return '<!doctype html>' + ve.serializeXhtml( newDoc );
};

/**
 * Track an event
 *
 * @param {string} name Event name
 */
ve.init.mw.Target.prototype.track = function () {};

/**
 * @inheritdoc
 */
ve.init.mw.Target.prototype.createSurface = function () {
	var surface, surfaceView, $documentNode;

	// Parent method
	surface = ve.init.mw.Target.super.prototype.createSurface.apply( this, arguments );

	surfaceView = surface.getView();
	$documentNode = surfaceView.getDocument().getDocumentNode().$element;

	surface.$element.addClass( this.protectedClasses );

	$documentNode.addClass(
		// Add appropriately mw-content-ltr or mw-content-rtl class
		'mw-content-' + mw.config.get( 'wgVisualEditor' ).pageLanguageDir
	);

	return surface;
};

/**
 * Switch to editing mode.
 *
 * @method
 * @param {HTMLDocument} doc HTML document
 * @param {Function} [callback] Callback to call when done
 */
ve.init.mw.Target.prototype.setupSurface = function ( doc, callback ) {
	var target = this;
	setTimeout( function () {
		// Build model
		var dmDoc,
			conf = mw.config.get( 'wgVisualEditor' );

		target.track( 'trace.convertModelFromDom.enter' );
		dmDoc = ve.dm.converter.getModelFromDom( doc, {
			lang: conf.pageLanguageCode,
			dir: conf.pageLanguageDir
		} );
		target.track( 'trace.convertModelFromDom.exit' );

		// Build DM tree now (otherwise it gets lazily built when building the CE tree)
		target.track( 'trace.buildModelTree.enter' );
		dmDoc.buildNodeTree();
		target.track( 'trace.buildModelTree.exit' );

		setTimeout( function () {
			var surface;
			// Clear dummy surfaces
			target.clearSurfaces();

			// Create ui.Surface (also creates ce.Surface and dm.Surface and builds CE tree)
			target.track( 'trace.createSurface.enter' );
			surface = target.addSurface( dmDoc );
			// Add classes specific to surfaces attached directly to the target,
			// as opposed to TargetWidget surfaces
			surface.$element.addClass( 've-init-mw-target-surface' );
			target.track( 'trace.createSurface.exit' );

			target.$element.append( surface.$element );

			target.dummyToolbar = false;
			target.setSurface( surface );

			setTimeout( function () {
				// Initialize surface
				target.track( 'trace.initializeSurface.enter' );

				target.active = true;
				// Now that the surface is attached to the document and ready,
				// let it initialize itself
				surface.initialize();
				target.track( 'trace.initializeSurface.exit' );
				setTimeout( callback );
			} );
		} );
	} );
};