if ( typeof(Twinkle) === "undefined" ) {

	alert( "Twinkle modules may not be directly imported.\nSee WP:Twinkle for installation instructions." );

}



function twinkleimagetraverse() {

	if( userIsInGroup( 'sysop' ) && wgNamespaceNumber == Namespace.CATEGORY ) {

		twAddPortletLink( "javascript:twinkleimagetraverse.callback()", "Traverse", "tw-imagetraverse", "Traverse category", "");

	}

}



twinkleimagetraverse.basequery = {

	'action': 'query',

	'rawcontinue': '',

	'generator': 'categorymembers',

	'gcmtitle': wgPageName,

	'gcmnamespace': Namespace.IMAGE,

	'gcmlimit' : 1, 

	'prop':  'imageinfo', 'categories', 'revisions' ],

	'rvlimit': 20,

	'iihistory': true,

	'rvprop':  'user', 'size', 'flags', 'ids', 'comment', 'timestamp' ],

	'iiprop':  'timestamp', 'user', 'url', 'size', 'comment' 

};

twinkleimagetraverse.callback = function() {

	var Window = new SimpleWindow( 1200, 650 );

	Window.setTitle( "Image traverse" );

	var form = new QuickForm( twinkleimagetraverse.callback.evaluate );

	form.append( {

			type: 'button',

			label: 'Skip',

			event: twinkleimagetraverse.callbacks.skip

		} );

	form.append( {

			type: 'button',

			label: 'Delete',

			event: twinkleimagetraverse.callbacks.deleteMain

		} );

	form.append( {

			type: 'input',

			label: 'Reason',

			name: 'reason',

			value: 'Speedy deleted',

			size: 80

		} );

	form.append( {

			type: 'checkbox',

			list: 

				{

					label: 'Remove image instances to the image',

					name: 'unlink',

					value: 'unlink',

					checked: true

				}

			

		} );

	var root = document.createElement( 'table' );



	root.style.background = 'transparent';

	root.style.height = '780px';

	var row = root.appendChild( document.createElement( 'tr' ) );

	var options = row.appendChild(  document.createElement( 'td' ) );

	options.setAttribute( 'colspan', 2 );

	var rendered = form.render();

	options.appendChild( rendered );



	rendered.root = root;



	

	options.style.borderBottom = '1px solid gray';

	options.style.height = '80px';

	var row = root.appendChild( document.createElement( 'tr' ) );

	var oview = row.appendChild(  document.createElement( 'td' ) );

	var ohistbox = row.appendChild(  document.createElement( 'td' ) );

	ohistbox.style.width = '250px';

	ohistbox.style.verticalAlign = 'top';

	var histbox = ohistbox.appendChild(  document.createElement( 'div' ) );

	histbox.style.overflow = 'auto';

	histbox.style.height = '500px';

	oview.style.verticalAlign = 'top';

	var view = oview.appendChild(  document.createElement( 'div' ) );

	view.style.height = '500px';

	view.style.overflow = 'auto';

	var row = root.appendChild( document.createElement( 'tr' ) );

	var ostatus = row.appendChild(  document.createElement( 'td' ) );

	ostatus.style.borderTop = '1px solid gray';

	ostatus.setAttribute( 'colspan', 2 );

	var status = ostatus.appendChild(  document.createElement( 'div' ) );

	ostatus.style.verticalAlign = 'top';

	status.style.height = '180px';

	status.style.overflow = 'auto';

	Wikipedia.actionCompleted.event = function() {} // just avoid it

	var wikipedia_api = new Wikipedia.api( 'Grabbing images', twinkleimagetraverse.basequery, twinkleimagetraverse.callbacks.main );

	wikipedia_api.params = { root:root, view:view, histbox:histbox, status:status, Window:Window };

	root.params = wikipedia_api.params;

	wikipedia_api.post();



	Status.init( status );

	Window.setContent( root );

	Window.display();

}



twinkleimagetraverse.callback.evaluate = function() {

}



function make_wikilink( page, title, oldid, diff ) {

	var query = {

		'title': page,

		'diff': diff,

		'oldid': oldid

	}

	var url = wgScriptPath + '/index.php?' + QueryString.create( query );

	var a = document.createElement( 'a' );

	a.setAttribute( 'href', url );

	a.setAttribute( 'title', page );

	a.appendChild( document.createTextNode( title ) );

	return a;

}



twinkleimagetraverse.callbacks = {

	main: function( self ) {

		var xmlDoc = self.responseXML;



		var image = xmlDoc.evaluate( '//pages/page/@title', xmlDoc, null, XPathResult.STRING_TYPE, null ).stringValue;



		if( !image ) {

			alert( 'no more images' );

			return;

		}

		var next = xmlDoc.evaluate( '//query-continue/categorymembers/@gcmcontinue', xmlDoc, null, XPathResult.STRING_TYPE, null ).stringValue;

		var pagehistory = xmlDoc.evaluate( '//pages/page/revisions/rev', xmlDoc, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null );

		var filehistory = xmlDoc.evaluate( '//pages/page/imageinfo/ii', xmlDoc, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null );

		var categories = xmlDoc.evaluate( '//pages/page/categories/cl', xmlDoc, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null );



		var pagehistorylist = document.createElement( 'ul' );

		var filehistorylist = document.createElement( 'ul' );

		var categorylist = document.createElement( 'ul' );



		var entry = document.createElement( 'li' );



		for( var i = 0; i < pagehistory.snapshotLength; ++i ) {

			var cur = pagehistory.snapshotItem(i);

			var tmp = entry.cloneNode(false);

			tmp.appendChild( make_wikilink( image, cur.getAttribute( 'timestamp' ), cur.getAttribute( 'revid' ) ) );

			tmp.appendChild( document.createTextNode( ' ' ) );

			tmp.appendChild( make_wikilink( 'User:' + cur.getAttribute( 'user' ), cur.getAttribute( 'user' ) ) );

			tmp.appendChild( document.createTextNode( ' \(' + ( new Bytes( cur.getAttribute( 'size' ) ) ).toString() + '\) \(' ) );

			tmp.appendChild( document.createElement( 'em' ) ).appendChild(document.createTextNode( cur.getAttribute( 'comment' ) ) );

			tmp.appendChild( document.createTextNode( '\)' ) );

			pagehistorylist.appendChild( tmp );

		}

		

		for( var i = 0; i < filehistory.snapshotLength; ++i ) {

			var cur = filehistory.snapshotItem(i);

			var tmp = entry.cloneNode(false);

			var link = document.createElement( 'a' );

			link.setAttribute( 'href', cur.getAttribute( 'url' ) );

			link.appendChild( document.createTextNode( cur.getAttribute( 'timestamp' ) ) );

			tmp.appendChild( link );

			tmp.appendChild( document.createTextNode( ' ' ) );

			tmp.appendChild( make_wikilink( 'User:' + cur.getAttribute( 'user' ), cur.getAttribute( 'user' ) ) );

			tmp.appendChild( document.createTextNode( ' \(' + ( new Bytes( cur.getAttribute( 'size' ) ) ).toString() + '\) \(' ) );

			tmp.appendChild( document.createElement( 'em' ) ).appendChild(document.createTextNode( cur.getAttribute( 'comment' ) ) );

			tmp.appendChild( document.createTextNode( '\)' ) );

			filehistorylist.appendChild( tmp );

		}



		for( var i = 0; i < categories.snapshotLength; ++i ) {

			var cur = categories.snapshotItem(i);

			var tmp = entry.cloneNode(false);

			tmp.appendChild( make_wikilink( cur.getAttribute( 'title' ), cur.getAttribute( 'title' ).replace( /Category:/, '' ) ) );

			categorylist.appendChild( tmp );

		}

		self.params.next = next;

		self.params.image = image;

		var hist = self.params.histbox;

		while( hist.hasChildNodes() ) {

			hist.removeChild( hist.lastChild );

		}

		hist.appendChild( document.createElement( 'h2' ) ).appendChild( document.createTextNode( 'Image usage' ) );

		var placeholder = hist.appendChild( document.createElement( 'div' ));

		placeholder.appendChild( document.createTextNode( 'Grabbing data...' ) );

		self.params.imageusageplaceholder = placeholder;

		hist.appendChild( document.createElement( 'h2' ) ).appendChild( document.createTextNode( 'Page history' ) );

		hist.appendChild( pagehistorylist );

		hist.appendChild( document.createElement( 'h2' ) ).appendChild( document.createTextNode( 'File history' ) );

		hist.appendChild( filehistorylist );

		hist.appendChild( document.createElement( 'h2' ) ).appendChild( document.createTextNode( 'Categories' ) );

		hist.appendChild( categorylist );



		var query = {

			'action': 'parse',

			'title': image,

			'text': '\{\{Wikipedia:WikiProject User scripts/Scripts/Twinkle/Template|' + image.replace(/^File:/, '') + '\}\}',

			'prop': 'text'

		}

		var wikipedia_api = new Wikipedia.api( 'Rendering', query, twinkleimagetraverse.callbacks.render1 );

		wikipedia_api.params = self.params;

		wikipedia_api.post();

	},

	render1: function( self ) {

		var xmlDoc = self.responseXML;

		var html = xmlDoc.evaluate( '//parse/text', xmlDoc, null, XPathResult.STRING_TYPE, null ).stringValue;

		self.params.view.innerHTML = html; // gah!



		// add instance usage

		var query = {

			'action': 'query',

			'list': 'imageusage',

			'iutitle': self.params.image,

			'iulimit': 20,

			'iufilterredir': 'nonredirects'

		}

		var wikipedia_api = new Wikipedia.api( 'Rendering', query, twinkleimagetraverse.callbacks.render2 );

		wikipedia_api.params = self.params;

		wikipedia_api.post();

	},

	render2: function( self ) {

		var xmlDoc = self.responseXML;

		var usage = xmlDoc.evaluate( '//imageusage/iu', xmlDoc, null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null );



		var usagelist = document.createElement( 'ul' );



		var entry = document.createElement( 'li' );



		for( var i = 0; i < usage.snapshotLength; ++i ) {

			var cur = usage.snapshotItem(i);

			var tmp = entry.cloneNode(false);

			tmp.appendChild( make_wikilink( cur.getAttribute( 'title' ), cur.getAttribute( 'title' ) ) );

			usagelist.appendChild( tmp );

		}

		var hist = self.params.histbox;

		hist.replaceChild( usagelist, self.params.imageusageplaceholder );



	},

	next: function( params ) {

		twinkleimagetraverse.basequery'gcmcontinue' = params.next;

		var wikipedia_api = new Wikipedia.api( 'Grabbing images', twinkleimagetraverse.basequery, twinkleimagetraverse.callbacks.main );

		wikipedia_api.params = params;

		wikipedia_api.post();

	},

	skip: function( event ) {

		var form = event.target.form;

		var params = form.root.params;

		twinkleimagetraverse.callbacks.next( params );

		Status.info( 'Skipped', params.image );

	},

	deleteMain: function( event ) {

		var form = event.target.form;

		var params = form.root.params;

		params.reason = form.reason.value;



		if( form.unlink.checked ) {

			var query = {

				'action': 'query',

				'list': 'imageusage',

				'titles': params.image,

				'iulimit': 5000,

				'iufilterredir': 'nonredirects'

			};

			var wikipedia_api = new Wikipedia.api( 'Grabbing image links', query, twinkleimagetraverse.callbacks.unlinkImageInstancesMain );

			wikipedia_api.params = params;



			wikipedia_api.post();

		}

		var query = { 

			'title': params.image, 

			'action': 'delete'

		};

		var wikipedia_wiki = new Wikipedia.wiki( 'Deleting image ' + params.image, query, twinkleimagetraverse.callbacks.deleteImage, function( self ) {

				twinkleimagetraverse.callbacks.next( self.params );

				self.statelem.unlink();

				Status.info( 'Deleted', self.params.image );



			});

		wikipedia_wiki.params = params;

		wikipedia_wiki.followRedirect = false;

		wikipedia_wiki.get();	

	},

	deleteImage: function( self ) {

		var form = this.responseXML.getElementById( 'deleteconfirm' );

		if( ! form ) { // Hell, image deletion is b0rked :(

			form = this.responseXML.getElementsByTagName( 'form' )[0];

			var postData = {

				'wpDeleteReasonList': 'other',

				'wpReason': "Deleted because \"" + self.params.reason + "\"." + TwinkleConfig.deletionSummaryAd,

				'wpEditToken': form.wpEditToken.value

			}

			self.post( postData );

		} else {



			var postData = {

				'wpWatch': form.wpWatch.checked ? '' : undefined,

				'wpDeleteReasonList': 'other',

				'wpReason': "Deleted because \"" + self.params.reason + "\"." + TwinkleConfig.deletionSummaryAd,

				'wpEditToken': form.wpEditToken.value

			}

			self.post( postData );

		}

	},

	unlinkImageInstancesMain: function( self ) {

		var xmlDoc = self.responseXML;

		var snapshot = xmlDoc.evaluate('//imageusage/iu/@title', xmlDoc, null, XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null );



		if( snapshot.snapshotLength == 0 ) {

			return;

		}



		var statusIndicator = new Status('Unlinking instances image', '0%');



		var total = snapshot.snapshotLength * 2;



		var onsuccess = function( self ) {

			var obj = self.params.obj;

			var total = self.params.total;

			var now = parseInt( 100 * ++(self.params.current)/total ) + '%';

			obj.update( now );

			self.statelem.unlink();

			if( self.params.current >= total ) {

				obj.info( now + ' (completed)' );

				Wikipedia.removeCheckpoint();

			}

		}

		var onloaded = onsuccess;



		var onloading = function( self ) {}





		Wikipedia.addCheckpoint();

		if( snapshot.snapshotLength == 0 ) {

			statusIndicator.info( '100% (completed)' );

			Wikipedia.removeCheckpoint();

			return;

		}

		self.params.total = total;

		self.params.obj = statusIndicator;

		self.params.current =   0;



		for ( var i = 0; i < snapshot.snapshotLength; ++i ) {

			var title = snapshot.snapshotItem(i).value;

			var query = {

				'title': title,

				'action': 'submit'

			}

			var wikipedia_wiki = new Wikipedia.wiki( "Unlinking on " + title, query, twinkleimagetraverse.callbacks.unlinkImageInstances );

			var params = clone( self.params );

			params.title = title;



			wikipedia_wiki.params = params;

			wikipedia_wiki.onloading = onloading;

			wikipedia_wiki.onloaded = onloaded;

			wikipedia_wiki.onsuccess = onsuccess;

			wikipedia_wiki.get();

		}

	},

	unlinkImageInstances: function( self ) {

		var image = self.params.image.replace( /^File:/, '' );

		var form = self.responseXML.getElementById('editform');

		var text;



		if( self.params.title in twinkledeli.unlinkCache ) {

			text = twinkledeli.unlinkCache self.params.title ];

		} else {

			text = form.wpTextbox1.value;

		}

		var old_text = text;

		var wikiPage = new Mediawiki.Page( text );

		wikiPage.commentOutImage( image , 'Commented out because image was deleted' );



		text = wikiPage.getText();

		twinkledeli.unlinkCache self.params.title  = text;

		if( text == old_text ) {

			// Nothing to do, return

			self.onsuccess( self );

			Wikipedia.actionCompleted( self );

			return;

		}

		var postData = {

			'wpMinoredit': form.wpMinoredit.checked ? '' : undefined,

			'wpWatchthis': undefined,

			'wpStarttime': form.wpStarttime.value,

			'wpEdittime': form.wpEdittime.value,

			'wpAutoSummary': form.wpAutoSummary.value,

			'wpEditToken': form.wpEditToken.value,

			'wpSummary': 'Removing instance of image ' + image + " that has been deleted because \"" + self.params.reason + "\")" + "; " + TwinkleConfig.deletionSummaryAd,

			'wpTextbox1': text

		};

		self.post( postData );

	}

}



// register initialization callback

Twinkle.init.moduleReady( "twinkleimagetraverse", twinkleimagetraverse );