/**
 * Configuration of Dialog module for wikiEditor
 */
/*jshint curly:false, noarg:false, quotmark:false, onevar:false */
/*global alert */
( function ( $, mw ) {

var hasOwn = Object.prototype.hasOwnProperty;

$.wikiEditor.modules.dialogs.config = {

	replaceIcons: function ( $textarea ) {
		$textarea
			.wikiEditor( 'removeFromToolbar', { section: 'main', group: 'insert', tool: 'xlink' } )
			.wikiEditor( 'removeFromToolbar', { section: 'main', group: 'insert', tool: 'ilink' } )
			.wikiEditor( 'removeFromToolbar', { section: 'main', group: 'insert', tool: 'file' } )
			.wikiEditor( 'removeFromToolbar', { section: 'main', group: 'insert', tool: 'reference' } )
			.wikiEditor( 'removeFromToolbar', { section: 'advanced', group: 'insert', tool: 'table' } )
			.wikiEditor( 'addToToolbar', {
				section: 'main',
				group: 'insert',
				tools: {
					'link': {
						labelMsg: 'wikieditor-toolbar-tool-link',
						type: 'button',
						icon: 'insert-link.png',
						offset: [2, -1654],
						action: {
							type: 'dialog',
							module: 'insert-link'
						}
					},
					'file': {
						labelMsg: 'wikieditor-toolbar-tool-file',
						type: 'button',
						icon: 'insert-file.png',
						offset: [2, -1438],
						action: {
							type: 'dialog',
							module: 'insert-file'
						}
					},
					'reference': {
						labelMsg: 'wikieditor-toolbar-tool-reference',
						filters: [ 'body.ns-subject' ],
						type: 'button',
						icon: 'insert-reference.png',
						offset: [2, -1798],
						action: {
							type: 'dialog',
							module: 'insert-reference'
						}
					}
				}
			} )
			.wikiEditor( 'addToToolbar', {
				section: 'advanced',
				group: 'insert',
				tools: {
					'table': {
						labelMsg: 'wikieditor-toolbar-tool-table',
						type: 'button',
						icon: 'insert-table.png',
						offset: [2, -1942],
						action: {
							type: 'dialog',
							module: 'insert-table'
						}
					}
				}
			} )
			.wikiEditor( 'addToToolbar', {
				section: 'advanced',
				groups: {
					'search': {
						tools: {
							'replace': {
								labelMsg: 'wikieditor-toolbar-tool-replace',
								type: 'button',
								icon: 'search-replace.png',
								offset: [-70, -214],
								action: {
									type: 'dialog',
									module: 'search-and-replace'
								}
							}
						}
					}
				}
			} );
	},

	getDefaultConfig: function () {
		return { 'dialogs': {
			'insert-link': {
				titleMsg: 'wikieditor-toolbar-tool-link-title',
				id: 'wikieditor-toolbar-link-dialog',
				htmlTemplate: 'dialogInsertLink.html',

				init: function () {
					var api = new mw.Api();

					function isExternalLink( s ) {
						// The following things are considered to be external links:
						// * Starts a URL protocol
						// * Starts with www.
						// All of these are potentially valid titles, and the latter two categories match about 6300
						// titles in enwiki's ns0. Out of 6.9M titles, that's 0.09%
						if ( typeof arguments.callee.regex === 'undefined' ) {
							// Cache the regex
							arguments.callee.regex =
								new RegExp( "^(" + mw.config.get( 'wgUrlProtocols' ) + "|www\\.)", 'i' );
						}
						return s.match( arguments.callee.regex );
					}

					// Updates the status indicator above the target link
					function updateWidget( status ) {
						$( '#wikieditor-toolbar-link-int-target-status' ).children().hide();
						$( '#wikieditor-toolbar-link-int-target' ).parent()
							.removeClass(
								'status-invalid status-external status-notexists status-exists status-loading'
							);
						if ( status ) {
							$( '#wikieditor-toolbar-link-int-target-status-' + status ).show();
							$( '#wikieditor-toolbar-link-int-target' ).parent().addClass( 'status-' + status );
						}
						if ( status === 'invalid' ) {
							$( '.ui-dialog:visible .ui-dialog-buttonpane button:first' )
								.attr( 'disabled', true )
								.addClass( 'disabled' );
						} else {
							$( '.ui-dialog:visible .ui-dialog-buttonpane button:first' )
								.removeAttr( 'disabled' )
								.removeClass( 'disabled' );
						}
					}

					// Updates the UI to show if the page title being inputed by the user exists or not
					// accepts parameter internal for bypassing external link detection
					function updateExistence( internal ) {
						// ensure the internal parameter is a boolean
						if ( internal !== true ) {
							internal = false;
						}
						// Abort previous request
						var request = $( '#wikieditor-toolbar-link-int-target-status' ).data( 'request' );
						if ( request ) {
							request.abort();
						}
						var target = $( '#wikieditor-toolbar-link-int-target' ).val();
						var cache = $( '#wikieditor-toolbar-link-int-target-status' ).data( 'existencecache' );
						if ( hasOwn.call( cache, target ) ) {
							updateWidget( cache[target] );
							return;
						}
						if ( target.replace( /^\s+$/,'' ) === '' ) {
							// Hide the widget when the textbox is empty
							updateWidget( false );
							return;
						}
						// If the forced internal paremter was not true, check if the target is an external link
						if ( !internal && isExternalLink( target ) ) {
							updateWidget( 'external' );
							return;
						}
						if ( target.indexOf( '|' ) !== -1 ) {
							// Title contains | , which means it's invalid
							// but confuses the API. Show invalid and bypass API
							updateWidget( 'invalid' );
							return;
						}
						// Show loading spinner while waiting for the API to respond
						updateWidget( 'loading' );
						// Call the API to check page status, saving the request object so it can be aborted if
						// necessary.
						// This used to request a page that would show whether or not the target exists, but we can
						// also check whether it has the disambiguation property and still get existence information.
						// If the Disambiguator extension is not installed then such a property won't be set.
						$( '#wikieditor-toolbar-link-int-target-status' ).data(
							'request',
							api.get( {
								action: 'query',
								prop: 'pageprops',
								titles: target,
								ppprop: 'disambiguation',
								indexpageids: true
							} ).done( function ( data ) {
								var status;
								if ( !data.query || !data.query.pages ) {
									// This happens in some weird cases like interwiki links
									status = false;
								} else {
									var page = data.query.pages[data.query.pageids[0]];
									status = 'exists';
									if ( page.missing !== undefined ) {
										status = 'notexists';
									} else if ( page.invalid !== undefined ) {
										status = 'invalid';
									} else if ( page.pageprops !== undefined ) {
										status = 'disambig';
									}
								}
								// Cache the status of the link target if the force internal
								// parameter was not passed
								if ( !internal ) {
									cache[target] = status;
								}
								updateWidget( status );
							} )
						);
					}
					$( '#wikieditor-toolbar-link-type-int, #wikieditor-toolbar-link-type-ext' ).click( function () {
						if ( $( '#wikieditor-toolbar-link-type-ext' ).prop( 'checked' ) ) {
							// Abort previous request
							var request = $( '#wikieditor-toolbar-link-int-target-status' ).data( 'request' );
							if ( request ) {
								request.abort();
							}
							updateWidget( 'external' );
						}
						if ( $( '#wikieditor-toolbar-link-type-int' ).prop( 'checked' ) ) {
							updateExistence( true );
						}
					} );
					// Set labels of tabs based on rel values
					$( this ).find( '[rel]' ).each( function () {
						$( this ).text( mw.msg( $( this ).attr( 'rel' ) ) );
					} );
					// Set tabindexes on form fields
					$.wikiEditor.modules.dialogs.fn.setTabindexes( $( this ).find( 'input' ).not( '[tabindex]' ) );
					// Setup the tooltips in the textboxes
					$( '#wikieditor-toolbar-link-int-target' )
						.data( 'tooltip', mw.msg( 'wikieditor-toolbar-tool-link-int-target-tooltip' ) );
					$( '#wikieditor-toolbar-link-int-text' )
						.data( 'tooltip', mw.msg( 'wikieditor-toolbar-tool-link-int-text-tooltip' ) );
					$( '#wikieditor-toolbar-link-int-target, #wikieditor-toolbar-link-int-text' )
						.each( function () {
							if ( $( this ).val() === '' ) {
								$( this )
									.addClass( 'wikieditor-toolbar-dialog-hint' )
									.val( $( this ).data( 'tooltip' ) )
									.data( 'tooltip-mode', true );
							}
						} )
						.focus( function () {
							if ( $( this ).val() === $( this ).data( 'tooltip' ) ) {
								$( this )
									.val( '' )
									.removeClass( 'wikieditor-toolbar-dialog-hint' )
									.data( 'tooltip-mode', false );
							}
						} )
						.bind( 'change', function () {
							if ( $( this ).val() !== $( this ).data( 'tooltip' ) ) {
								$( this )
									.removeClass( 'wikieditor-toolbar-dialog-hint' )
									.data( 'tooltip-mode', false );
							}
						} )
						.bind( 'blur', function () {
							if ( $( this ).val() === '' ) {
								$( this )
									.addClass( 'wikieditor-toolbar-dialog-hint' )
									.val( $( this ).data( 'tooltip' ) )
									.data( 'tooltip-mode', true );
							}
						} );

					// Automatically copy the value of the internal link page title field to the link text field unless the
					// user has changed the link text field - this is a convenience thing since most link texts are going to
					// be the the same as the page title - Also change the internal/external radio button accordingly
					$( '#wikieditor-toolbar-link-int-target' ).bind( 'change keydown paste cut', function () {
						// $( this ).val() is the old value, before the keypress - Defer this until $( this ).val() has
						// been updated
						setTimeout( function () {
							if ( isExternalLink( $( '#wikieditor-toolbar-link-int-target' ).val() ) ) {
								$( '#wikieditor-toolbar-link-type-ext' ).prop( 'checked', true );
								updateWidget( 'external' );
							} else {
								$( '#wikieditor-toolbar-link-type-int' ).prop( 'checked', true );
								updateExistence();
							}
							/*jshint eqeqeq:false */
							if ( $( '#wikieditor-toolbar-link-int-text' ).data( 'untouched' ) ) {
								if ( $( '#wikieditor-toolbar-link-int-target' ).val() ==
									$( '#wikieditor-toolbar-link-int-target' ).data( 'tooltip' )
								) {
									$( '#wikieditor-toolbar-link-int-text' )
										.addClass( 'wikieditor-toolbar-dialog-hint' )
										.val( $( '#wikieditor-toolbar-link-int-text' ).data( 'tooltip' ) )
										.change();
								} else {
									$( '#wikieditor-toolbar-link-int-text' )
										.val( $( '#wikieditor-toolbar-link-int-target' ).val() )
										.change();
								}
							}
						}, 0 );
					} );
					$( '#wikieditor-toolbar-link-int-text' ).bind( 'change keydown paste cut', function () {
						var oldVal = $( this ).val();
						var that = this;
						setTimeout( function () {
							if ( $( that ).val() !== oldVal ) {
								$( that ).data( 'untouched', false );
							}
						}, 0 );
					} );
					// Add images to the page existence widget, which will be shown mutually exclusively to communicate if
					// the page exists, does not exist or the title is invalid (like if it contains a | character)
					var loadingMsg = mw.msg( 'wikieditor-toolbar-tool-link-int-target-status-loading' );
					$( '#wikieditor-toolbar-link-int-target-status' )
						.append( $( '<div>' )
							.attr( 'id', 'wikieditor-toolbar-link-int-target-status-exists' )
							.text( mw.msg( 'wikieditor-toolbar-tool-link-int-target-status-exists' ) )
						)
						.append( $( '<div>' )
							.attr( 'id', 'wikieditor-toolbar-link-int-target-status-notexists' )
							.text( mw.msg( 'wikieditor-toolbar-tool-link-int-target-status-notexists' ) )
						)
						.append( $( '<div>' )
							.attr( 'id', 'wikieditor-toolbar-link-int-target-status-invalid' )
							.text( mw.msg( 'wikieditor-toolbar-tool-link-int-target-status-invalid' ) )
						)
						.append( $( '<div>' )
							.attr( 'id', 'wikieditor-toolbar-link-int-target-status-external' )
							.text( mw.msg( 'wikieditor-toolbar-tool-link-int-target-status-external' ) )
						)
						.append( $( '<div>' )
							.attr( 'id', 'wikieditor-toolbar-link-int-target-status-loading' )
							.append( $( '<img>' ).attr( {
								'src': $.wikiEditor.imgPath + 'dialogs/' + 'loading-small.gif',
								'alt': loadingMsg,
								'title': loadingMsg
							} ) )
						)
						.append( $( '<div>' )
							.attr( 'id', 'wikieditor-toolbar-link-int-target-status-disambig' )
							.text( mw.msg( 'wikieditor-toolbar-tool-link-int-target-status-disambig' ) )
						)
						.data( 'existencecache', {} )
						.children().hide();

					$( '#wikieditor-toolbar-link-int-target' )
						.bind( 'keyup paste cut', function () {
							// Cancel the running timer if applicable
							if ( typeof $( this ).data( 'timerID' ) !== 'undefined' ) {
								clearTimeout( $( this ).data( 'timerID' ) );
							}
							// Delay fetch for a while
							// FIXME: Make 120 configurable elsewhere
							var timerID = setTimeout( updateExistence, 120 );
							$( this ).data( 'timerID', timerID );
						} )
						.change( function () {
							// Cancel the running timer if applicable
							if ( typeof $( this ).data( 'timerID' ) !== 'undefined' ) {
								clearTimeout( $( this ).data( 'timerID' ) );
							}
							// Fetch right now
							updateExistence();
						} );

					// Title suggestions
					$( '#wikieditor-toolbar-link-int-target' ).data( 'suggcache', {} ).suggestions( {
						fetch: function () {
							var that = this;
							var title = $( this ).val();

							if ( isExternalLink( title ) || title.indexOf( '|' ) !== -1 || title === '' ) {
								$( this ).suggestions( 'suggestions', [] );
								return;
							}

							var cache = $( this ).data( 'suggcache' );
							if ( hasOwn.call( cache, title ) ) {
								$( this ).suggestions( 'suggestions', cache[title] );
								return;
							}

							var request = api.get( {
								action: 'opensearch',
								search: title,
								namespace: 0,
								suggest: ''
							} )
							.done( function ( data ) {
								cache[title] = data[1];
								$( that ).suggestions( 'suggestions', data[1] );
							} );
							$( this ).data( 'request', request );
						},
						cancel: function () {
							var request = $( this ).data( 'request' );
							if ( request )
								request.abort();
						}
					} );
				},
				dialog: {
					width: 500,
					dialogClass: 'wikiEditor-toolbar-dialog',
					buttons: {
						'wikieditor-toolbar-tool-link-insert': function () {
							function escapeInternalText( s ) {
								return s.replace( /(\]{2,})/g, '<nowiki>$1</nowiki>' );
							}
							function escapeExternalTarget( s ) {
								return s.replace( / /g, '%20' )
									.replace( /\[/g, '%5B' )
									.replace( /\]/g, '%5D' );
							}
							function escapeExternalText( s ) {
								return s.replace( /(\]+)/g, '<nowiki>$1</nowiki>' );
							}
							var insertText = '';
							var whitespace = $( '#wikieditor-toolbar-link-dialog' ).data( 'whitespace' );
							var target = $( '#wikieditor-toolbar-link-int-target' ).val();
							var text = $( '#wikieditor-toolbar-link-int-text' ).val();
							// check if the tooltips were passed as target or text
							if ( $( '#wikieditor-toolbar-link-int-target' ).data( 'tooltip-mode' ) )
								target = "";
							if ( $( '#wikieditor-toolbar-link-int-text' ).data( 'tooltip-mode' ) )
								text = "";
							if ( target === '' ) {
								alert( mw.msg( 'wikieditor-toolbar-tool-link-empty' ) );
								return;
							}
							if ( $.trim( text ) === '' ) {
								// [[Foo| ]] creates an invisible link
								// Instead, generate [[Foo|]]
								text = '';
							}
							if ( $( '#wikieditor-toolbar-link-type-int' ).is( ':checked' ) ) {
								// FIXME: Exactly how fragile is this?
								if ( $( '#wikieditor-toolbar-link-int-target-status-invalid' ).is( ':visible' ) ) {
									// Refuse to add links to invalid titles
									alert( mw.msg( 'wikieditor-toolbar-tool-link-int-invalid' ) );
									return;
								}

								if ( target === text || !text.length )
									insertText = '[[' + target + ']]';
								else
									insertText = '[[' + target + '|' + escapeInternalText( text ) + ']]';
							} else {
								target = $.trim( target );
								// Prepend http:// if there is no protocol
								if ( !target.match( /^[a-z]+:\/\/./ ) )
									target = 'http://' + target;

								// Detect if this is really an internal link in disguise
								var match = target.match( $( this ).data( 'articlePathRegex' ) );
								if ( match && !$( this ).data( 'ignoreLooksInternal' ) ) {
									var buttons = { };
									var that = this;
									buttons[ mw.msg( 'wikieditor-toolbar-tool-link-lookslikeinternal-int' ) ] =
										function () {
											$( '#wikieditor-toolbar-link-int-target' ).val( match[1] ).change();
											$( this ).dialog( 'close' );
										};
									buttons[ mw.msg( 'wikieditor-toolbar-tool-link-lookslikeinternal-ext' ) ] =
										function () {
											$( that ).data( 'ignoreLooksInternal', true );
											$( that ).closest( '.ui-dialog' ).find( 'button:first' ).click();
											$( that ).data( 'ignoreLooksInternal', false );
											$( this ).dialog( 'close' );
										};
									$.wikiEditor.modules.dialogs.quickDialog(
										mw.msg( 'wikieditor-toolbar-tool-link-lookslikeinternal', match[1] ),
										{ buttons: buttons }
									);
									return;
								}

								var escTarget = escapeExternalTarget( target );
								var escText = escapeExternalText( text );

								if ( escTarget === escText )
									insertText = escTarget;
								else if ( text === '' )
									insertText = '[' + escTarget + ']';
								else
									insertText = '[' + escTarget + ' ' + escText + ']';
							}
							// Preserve whitespace in selection when replacing
							if ( whitespace ) {
								insertText = whitespace[0] + insertText + whitespace[1];
							}
							$( this ).dialog( 'close' );
							$.wikiEditor.modules.toolbar.fn.doAction( $( this ).data( 'context' ), {
								type: 'replace',
								options: {
									pre: insertText
								}
							}, $( this ) );

							// Blank form
							$( '#wikieditor-toolbar-link-int-target, #wikieditor-toolbar-link-int-text' ).val( '' );
							$( '#wikieditor-toolbar-link-type-int, #wikieditor-toolbar-link-type-ext' )
								.attr( 'checked', '' );
						},
						'wikieditor-toolbar-tool-link-cancel': function () {
							// Clear any saved selection state
							var context = $( this ).data( 'context' );
							context.fn.restoreCursorAndScrollTop();
							$( this ).dialog( 'close' );
						}
					},
					open: function () {
						var target, text, type, matches;

						// Obtain the server name without the protocol. wgServer may be protocol-relative
						var serverName = mw.config.get( 'wgServer' ).replace( /^(https?:)?\/\//, '' );
						// Cache the articlepath regex
						$( this ).data( 'articlePathRegex', new RegExp(
							'^https?://' + mw.RegExp.escape( serverName + mw.config.get( 'wgArticlePath' ) )
								.replace( /\\\$1/g, '(.*)' ) + '$'
						) );
						// Pre-fill the text fields based on the current selection
						var context = $( this ).data( 'context' );
						// Restore and immediately save selection state, needed for inserting stuff later
						context.fn.restoreCursorAndScrollTop();
						context.fn.saveCursorAndScrollTop();
						var selection = context.$textarea.textSelection( 'getSelection' );
						$( '#wikieditor-toolbar-link-int-target' ).focus();
						// Trigger the change event, so the link status indicator is up to date
						$( '#wikieditor-toolbar-link-int-target' ).change();
						$( '#wikieditor-toolbar-link-dialog' ).data( 'whitespace', [ '', '' ] );
						if ( selection !== '' ) {
							if ( ( matches = selection.match( /^(\s*)\[\[([^\]\|]+)(\|([^\]\|]*))?\]\](\s*)$/ ) ) ) {
								// [[foo|bar]] or [[foo]]
								target = matches[2];
								text = ( matches[4] ? matches[4] : matches[2] );
								type = 'int';
								// Preserve whitespace when replacing
								$( '#wikieditor-toolbar-link-dialog' ).data( 'whitespace', [ matches[1], matches[5] ] );
							} else if ( ( matches = selection.match( /^(\s*)\[([^\] ]+)( ([^\]]+))?\](\s*)$/ ) ) ) {
								// [http://www.example.com foo] or [http://www.example.com]
								target = matches[2];
								text = ( matches[4] || '' );
								type = 'ext';
								// Preserve whitespace when replacing
								$( '#wikieditor-toolbar-link-dialog' ).data( 'whitespace', [ matches[1], matches[5] ] );
							} else {
								// Trim any leading and trailing whitespace from the selection,
								// but preserve it when replacing
								target = text = $.trim( selection );
								if ( target.length < selection.length ) {
									$( '#wikieditor-toolbar-link-dialog' ).data( 'whitespace', [
										selection.substr( 0, selection.indexOf( target.charAt( 0 ) ) ),
										selection.substr(
											selection.lastIndexOf( target.charAt( target.length - 1 ) ) + 1
										) ]
									);
								}
							}

							// Change the value by calling val() doesn't trigger the change event, so let's do that
							// ourselves
							if ( typeof text !== 'undefined' )
								$( '#wikieditor-toolbar-link-int-text' ).val( text ).change();
							if ( typeof target !== 'undefined' )
								$( '#wikieditor-toolbar-link-int-target' ).val( target ).change();
							if ( typeof type !== 'undefined' )
								$( '#wikieditor-toolbar-link-' + type ).prop( 'checked', true );
						}
						$( '#wikieditor-toolbar-link-int-text' ).data( 'untouched',
							$( '#wikieditor-toolbar-link-int-text' ).val() ===
									$( '#wikieditor-toolbar-link-int-target' ).val() ||
								$( '#wikieditor-toolbar-link-int-text' ).hasClass( 'wikieditor-toolbar-dialog-hint' )
						);
						$( '#wikieditor-toolbar-link-int-target' ).suggestions();

						// don't overwrite user's text
						if ( selection !== '' ) {
							$( '#wikieditor-toolbar-link-int-text' ).data( 'untouched', false );
						}

						$( '#wikieditor-toolbar-link-int-text, #wikiedit-toolbar-link-int-target' )
							.each( function () {
								if ( $( this ).val() === '' )
									$( this ).parent().find( 'label' ).show();
							} );

						if ( !$( this ).data( 'dialogkeypressset' ) ) {
							$( this ).data( 'dialogkeypressset', true );
							// Execute the action associated with the first button
							// when the user presses Enter
							$( this ).closest( '.ui-dialog' ).keypress( function ( e ) {
								if ( ( e.keyCode || e.which ) === 13 ) {
									var button = $( this ).data( 'dialogaction' ) || $( this ).find( 'button:first' );
									button.click();
									e.preventDefault();
								}
							} );

							// Make tabbing to a button and pressing
							// Enter do what people expect
							$( this ).closest( '.ui-dialog' ).find( 'button' ).focus( function () {
								$( this ).closest( '.ui-dialog' ).data( 'dialogaction', this );
							} );
						}
					}
				}
			},
			'insert-reference': {
				titleMsg: 'wikieditor-toolbar-tool-reference-title',
				id: 'wikieditor-toolbar-reference-dialog',
				htmlTemplate: 'dialogInsertReference.html',
				init: function () {
					// Insert translated strings into labels
					$( this ).find( '[rel]' ).each( function () {
						$( this ).text( mw.msg( $( this ).attr( 'rel' ) ) );
					} );

				},
				dialog: {
					dialogClass: 'wikiEditor-toolbar-dialog',
					width: 590,
					buttons: {
						'wikieditor-toolbar-tool-reference-insert': function () {
							var insertText = $( '#wikieditor-toolbar-reference-text' ).val();
							var whitespace = $( '#wikieditor-toolbar-reference-dialog' ).data( 'whitespace' );
							var attributes = $( '#wikieditor-toolbar-reference-dialog' ).data( 'attributes' );
							// Close the dialog
							$( this ).dialog( 'close' );
							$.wikiEditor.modules.toolbar.fn.doAction(
								$( this ).data( 'context' ),
								{
									type: 'replace',
									options: {
										pre: whitespace[0] + '<ref' + attributes + '>',
										peri: insertText,
										post: '</ref>' + whitespace[1]
									}
								},
								$( this )
							);
							// Restore form state
							$( '#wikieditor-toolbar-reference-text' ).val( '' );
						},
						'wikieditor-toolbar-tool-reference-cancel': function () {
							// Clear any saved selection state
							var context = $( this ).data( 'context' );
							context.fn.restoreCursorAndScrollTop();
							$( this ).dialog( 'close' );
						}
					},
					open: function () {
						// Pre-fill the text fields based on the current selection
						var context = $( this ).data( 'context' );
						// Restore and immediately save selection state, needed for inserting stuff later
						context.fn.restoreCursorAndScrollTop();
						context.fn.saveCursorAndScrollTop();
						var selection = context.$textarea.textSelection( 'getSelection' );
						// set focus
						$( '#wikieditor-toolbar-reference-text' ).focus();
						$( '#wikieditor-toolbar-reference-dialog' )
							.data( 'whitespace', [ '', '' ] )
							.data( 'attributes', '' );
						if ( selection !== '' ) {
							var matches, text;
							if ( ( matches = selection.match( /^(\s*)<ref([^\>]*)>([^<]*)<\/ref\>(\s*)$/ ) ) ) {
								text = matches[3];
								// Preserve whitespace when replacing
								$( '#wikieditor-toolbar-reference-dialog' )
									.data( 'whitespace', [ matches[1], matches[4] ] );
								$( '#wikieditor-toolbar-reference-dialog' ).data( 'attributes', matches[2] );
							} else {
								text = selection;
							}
							$( '#wikieditor-toolbar-reference-text' ).val( text );
						}
						if ( !( $( this ).data( 'dialogkeypressset' ) ) ) {
							$( this ).data( 'dialogkeypressset', true );
							// Execute the action associated with the first button
							// when the user presses Enter
							$( this ).closest( '.ui-dialog' ).keypress( function ( e ) {
								if ( ( e.keyCode || e.which ) === 13 ) {
									var button = $( this ).data( 'dialogaction' ) || $( this ).find( 'button:first' );
									button.click();
									e.preventDefault();
								}
							} );
							// Make tabbing to a button and pressing
							// Enter do what people expect
							$( this ).closest( '.ui-dialog' ).find( 'button' ).focus( function () {
								$( this ).closest( '.ui-dialog' ).data( 'dialogaction', this );
							} );
						}
					}
				}
			},
			'insert-file': {
				titleMsg: 'wikieditor-toolbar-tool-file-title',
				id: 'wikieditor-toolbar-file-dialog',
				htmlTemplate: 'dialogInsertFile.html',
				init: function () {
					var magicWordsI18N = mw.config.get( 'wgWikiEditorMagicWords' );
					var defaultMsg = mw.msg( 'wikieditor-toolbar-file-default' );
					$( this )
						.find( '[data-i18n-magic]' )
							.text( function () {
								return magicWordsI18N[ $( this ).attr( 'data-i18n-magic' ) ];
							} )
							.removeAttr( 'data-i18n-magic' )
							.end()
						.find( '#wikieditor-toolbar-file-size' )
							.attr( 'placeholder', defaultMsg )
							// The message may be long in some languages
							.attr( 'size', defaultMsg.length )
							.end()
						.find( '[rel]' )
							.text( function () {
								return mw.msg( $( this ).attr( 'rel' ) );
							} )
							.removeAttr( 'rel' )
							.end();
				},
				dialog: {
					resizable: false,
					dialogClass: 'wikiEditor-toolbar-dialog',
					width: 590,
					buttons: {
						'wikieditor-toolbar-tool-file-insert': function () {
							var fileName, caption, fileFloat, fileFormat, fileSize, fileTitle,
								options, fileUse,
								hasPxRgx = /.+px$/,
								magicWordsI18N = mw.config.get( 'wgWikiEditorMagicWords' );
							fileName = $( '#wikieditor-toolbar-file-target' ).val();
							caption = $( '#wikieditor-toolbar-file-caption' ).val();
							fileFloat = $( '#wikieditor-toolbar-file-float' ).val();
							fileFormat = $( '#wikieditor-toolbar-file-format' ).val();
							fileSize = $( '#wikieditor-toolbar-file-size' ).val();
							// Append px to end to size if not already contains it
							if ( fileSize !== '' && !hasPxRgx.test( fileSize ) ) {
								fileSize += 'px';
							}
							if ( fileName !== '' ) {
								fileTitle = new mw.Title( fileName );
								// Append file namespace prefix to filename if not already contains it
								if ( fileTitle.getNamespaceId() !== 6 ) {
									fileTitle = new mw.Title( fileName, 6 );
								}
								fileName = fileTitle.toText();
							}
							options = [ fileSize, fileFormat, fileFloat ];
							// Filter empty values
							options = $.grep( options, function ( val ) {
								return val.length && val !== 'default';
							} );
							if ( caption.length ) {
								options.push( caption );
							}
							fileUse = options.length === 0 ? fileName : ( fileName + '|' + options.join( '|' ) );
							$( this ).dialog( 'close' );
							$.wikiEditor.modules.toolbar.fn.doAction(
								$( this ).data( 'context' ),
								{
									type: 'replace',
									options: {
										pre: '[[',
										peri: fileUse,
										post: ']]',
										ownline: true
									}
								},
								$( this )
							);

							// Restore form state
							$( ['#wikieditor-toolbar-file-target',
								'#wikieditor-toolbar-file-caption',
								'#wikieditor-toolbar-file-size'].join( ',' )
							).val( '' );
							$( '#wikieditor-toolbar-file-float' ).val( 'default' );
							/*jshint camelcase: false */
							$( '#wikieditor-toolbar-file-format' ).val( magicWordsI18N.img_thumbnail );
						},
						'wikieditor-toolbar-tool-file-cancel': function () {
							$( this ).dialog( 'close' );
						}
					},
					open: function () {
						$( '#wikieditor-toolbar-file-target' ).focus();
						if ( !( $( this ).data( 'dialogkeypressset' ) ) ) {
							$( this ).data( 'dialogkeypressset', true );
							// Execute the action associated with the first button
							// when the user presses Enter
							$( this ).closest( '.ui-dialog' ).keypress( function ( e ) {
								if ( e.which === 13 ) {
									var button = $( this ).data( 'dialogaction' ) ||
										$( this ).find( 'button:first' );
									button.click();
									e.preventDefault();
								}
							} );

							// Make tabbing to a button and pressing
							// Enter do what people expect
							$( this ).closest( '.ui-dialog' ).find( 'button' ).focus( function () {
								$( this ).closest( '.ui-dialog' ).data( 'dialogaction', this );
							} );
						}
					}
				}
			},
			'insert-table': {
				titleMsg: 'wikieditor-toolbar-tool-table-title',
				id: 'wikieditor-toolbar-table-dialog',
				htmlTemplate: 'dialogInsertTable.html',
				init: function () {
					$( this ).find( '[rel]' ).each( function () {
						$( this ).text( mw.msg( $( this ).attr( 'rel' ) ) );
					} );
					// Set tabindexes on form fields
					$.wikiEditor.modules.dialogs.fn.setTabindexes( $( this ).find( 'input' ).not( '[tabindex]' ) );

					$( '#wikieditor-toolbar-table-dimensions-rows' ).val( 3 );
					$( '#wikieditor-toolbar-table-dimensions-columns' ).val( 3 );
					$( '#wikieditor-toolbar-table-wikitable' ).click( function () {
						$( '.wikieditor-toolbar-table-preview' ).toggleClass( 'wikitable' );
					} );

					// Hack for sortable preview: dynamically adding
					// sortable class doesn't work, so we use a clone
					$( '#wikieditor-toolbar-table-preview' )
						.clone()
						.attr( 'id', 'wikieditor-toolbar-table-preview2' )
						.addClass( 'sortable' )
						.insertAfter( $( '#wikieditor-toolbar-table-preview' ) )
						.hide();

					mw.loader.using( 'jquery.tablesorter', function () {
						$( '#wikieditor-toolbar-table-preview2' ).tablesorter();
					} );

					$( '#wikieditor-toolbar-table-sortable' ).click( function () {
						// Swap the currently shown one clone with the other one
						$( '#wikieditor-toolbar-table-preview' )
							.hide()
							.attr( 'id', 'wikieditor-toolbar-table-preview3' );
						$( '#wikieditor-toolbar-table-preview2' )
							.attr( 'id', 'wikieditor-toolbar-table-preview' )
							.show();
						$( '#wikieditor-toolbar-table-preview3' ).attr( 'id', 'wikieditor-toolbar-table-preview2' );
					} );

					$( '#wikieditor-toolbar-table-dimensions-header' ).click( function () {
						// Instead of show/hiding, switch the HTML around
						// We do this because the sortable tables script styles the first row,
						// visible or not
						var headerHTML = $( '.wikieditor-toolbar-table-preview-header' ).html();
						var hiddenHTML = $( '.wikieditor-toolbar-table-preview-hidden' ).html();
						$( '.wikieditor-toolbar-table-preview-header' ).html( hiddenHTML );
						$( '.wikieditor-toolbar-table-preview-hidden' ).html( headerHTML );
						if ( typeof jQuery.fn.tablesorter === 'function' ) {
							$( '#wikieditor-toolbar-table-preview, #wikieditor-toolbar-table-preview2' )
								.filter( '.sortable' )
								.tablesorter();
						}
					} );
				},
				dialog: {
					resizable: false,
					dialogClass: 'wikiEditor-toolbar-dialog',
					width: 590,
					buttons: {
						'wikieditor-toolbar-tool-table-insert': function () {
							var rowsVal = $( '#wikieditor-toolbar-table-dimensions-rows' ).val();
							var colsVal = $( '#wikieditor-toolbar-table-dimensions-columns' ).val();
							var rows = parseInt( rowsVal, 10 );
							var cols = parseInt( colsVal, 10 );
							var header = $( '#wikieditor-toolbar-table-dimensions-header' ).prop( 'checked' ) ? 1 : 0;
							if ( isNaN( rows ) || isNaN( cols ) || String( rows ) !== rowsVal || String( cols ) !== colsVal || rowsVal < 0 || colsVal < 0 ) {
								alert( mw.msg( 'wikieditor-toolbar-tool-table-invalidnumber' ) );
								return;
							}
							if ( rows + header === 0 || cols === 0 ) {
								alert( mw.msg( 'wikieditor-toolbar-tool-table-zero' ) );
								return;
							}
							if ( ( rows * cols ) > 1000 ) {
								// 1000 is in the English message. The parameter replacement is kept for BC.
								alert( mw.msg( 'wikieditor-toolbar-tool-table-toomany', 1000 ) );
								return;
							}
							var headerText = mw.msg( 'wikieditor-toolbar-tool-table-example-header' );
							var normalText = mw.msg( 'wikieditor-toolbar-tool-table-example' );
							var table = "";
							for ( var r = 0; r < rows + header; r++ ) {
								table += "|-\n";
								for ( var c = 0; c < cols; c++ ) {
									var isHeader = ( header && r === 0 );
									var delim = isHeader ? '!' : '|';
									if ( c > 0 ) {
										delim += delim;
									}
									table += delim + ' ' + ( isHeader ? headerText : normalText ) + ' ';
								}
								// Replace trailing space by newline
								// table[table.length - 1] is read-only
								table = table.substr( 0, table.length - 1 ) + "\n";
							}
							var classes = [];
							if ( $( '#wikieditor-toolbar-table-wikitable' ).is( ':checked' ) )
								classes.push( 'wikitable' );
							if ( $( '#wikieditor-toolbar-table-sortable' ).is( ':checked' ) )
								classes.push( 'sortable' );
							var classStr = classes.length > 0 ? ' class="' + classes.join( ' ' ) + '"' : '';
							$( this ).dialog( 'close' );
							$.wikiEditor.modules.toolbar.fn.doAction(
								$( this ).data( 'context' ),
								{
									type: 'replace',
									options: {
										pre: '{|' + classStr + "\n",
										peri: table,
										post: '|}',
										ownline: true
									}
								},
								$( this )
							);

							// Restore form state
								$( '#wikieditor-toolbar-table-dimensions-rows' ).val( 3 );
								$( '#wikieditor-toolbar-table-dimensions-columns' ).val( 3 );
							// Simulate clicks instead of setting values, so the according
							// actions are performed
								if ( !$( '#wikieditor-toolbar-table-dimensions-header' ).is( ':checked' ) )
									$( '#wikieditor-toolbar-table-dimensions-header' ).click();
								if ( !$( '#wikieditor-toolbar-table-wikitable' ).is( ':checked' ) )
									$( '#wikieditor-toolbar-table-wikitable' ).click();
								if ( $( '#wikieditor-toolbar-table-sortable' ).is( ':checked' ) )
									$( '#wikieditor-toolbar-table-sortable' ).click();
						},
						'wikieditor-toolbar-tool-table-cancel': function () {
							$( this ).dialog( 'close' );
						}
					},
					open: function () {
						$( '#wikieditor-toolbar-table-dimensions-rows' ).focus();
						if ( !( $( this ).data( 'dialogkeypressset' ) ) ) {
							$( this ).data( 'dialogkeypressset', true );
							// Execute the action associated with the first button
							// when the user presses Enter
							$( this ).closest( '.ui-dialog' ).keypress( function ( e ) {
								if ( ( e.keyCode || e.which ) === 13 ) {
									var button = $( this ).data( 'dialogaction' ) || $( this ).find( 'button:first' );
									button.click();
									e.preventDefault();
								}
							} );

							// Make tabbing to a button and pressing
							// Enter do what people expect
							$( this ).closest( '.ui-dialog' ).find( 'button' ).focus( function () {
								$( this ).closest( '.ui-dialog' ).data( 'dialogaction', this );
							} );
						}
					}
				}
			},
			'search-and-replace': {
				'browsers': {
					// Left-to-right languages
					'ltr': {
						'msie': [['>=', 11]], // Known to work on 11.
						'firefox': [['>=', 2]],
						'opera': false,
						'safari': [['>=', 3]],
						'chrome': [['>=', 3]]
					},
					// Right-to-left languages
					'rtl': {
						'msie': [['>=', 11]], // Works on 11 but dialog positioning is cruddy.
						'firefox': [['>=', 2]],
						'opera': false,
						'safari': [['>=', 3]],
						'chrome': [['>=', 3]]
					}
				},
				titleMsg: 'wikieditor-toolbar-tool-replace-title',
				id: 'wikieditor-toolbar-replace-dialog',
				htmlTemplate: 'dialogReplace.html',
				init: function () {
					$( this ).find( '[rel]' ).each( function () {
						$( this ).text( mw.msg( $( this ).attr( 'rel' ) ) );
					} );
					// Set tabindexes on form fields
					$.wikiEditor.modules.dialogs.fn.setTabindexes( $( this ).find( 'input' ).not( '[tabindex]' ) );

					// TODO: Find a cleaner way to share this function
					$( this ).data( 'replaceCallback', function ( mode ) {
						var offset, textRemainder, regex, index, i,
							start, end;

						$( '#wikieditor-toolbar-replace-nomatch, #wikieditor-toolbar-replace-success, #wikieditor-toolbar-replace-emptysearch, #wikieditor-toolbar-replace-invalidregex' ).hide();

						// Search string cannot be empty
						var searchStr = $( '#wikieditor-toolbar-replace-search' ).val();
						if ( searchStr === '' ) {
							$( '#wikieditor-toolbar-replace-emptysearch' ).show();
							return;
						}

						// Replace string can be empty
						var replaceStr = $( '#wikieditor-toolbar-replace-replace' ).val();

						// Prepare the regular expression flags
						var flags = 'm';
						var matchCase = $( '#wikieditor-toolbar-replace-case' ).is( ':checked' );
						if ( !matchCase ) {
							flags += 'i';
						}
						var isRegex = $( '#wikieditor-toolbar-replace-regex' ).is( ':checked' );
						if ( !isRegex ) {
							searchStr = mw.RegExp.escape( searchStr );
						}
						if ( mode === 'replaceAll' ) {
							flags += 'g';
						}

						try {
							regex = new RegExp( searchStr, flags );
						} catch ( e ) {
							$( '#wikieditor-toolbar-replace-invalidregex' )
								.text( mw.msg( 'wikieditor-toolbar-tool-replace-invalidregex',
									e.message ) )
								.show();
							return;
						}

						var $textarea = $( this ).data( 'context' ).$textarea;
						var text = $textarea.textSelection( 'getContents' );
						var match = false;
						if ( mode !== 'replaceAll' ) {
							if ( mode === 'replace' ) {
								offset = $( this ).data( 'matchIndex' );
							} else {
								offset = $( this ).data( 'offset' );
							}
							textRemainder = text.substr( offset );
							match = textRemainder.match( regex );
						}
						if ( !match ) {
							// Search hit BOTTOM, continuing at TOP
							// TODO: Add a "Wrap around" option.
							offset = 0;
							textRemainder = text;
							match = textRemainder.match( regex );
						}

						if ( !match ) {
							$( '#wikieditor-toolbar-replace-nomatch' ).show();
						} else if ( mode === 'replaceAll' ) {
							// Instead of using repetitive .match() calls, we use one .match() call with /g
							// and indexOf() followed by substr() to find the offsets. This is actually
							// faster because our indexOf+substr loop is faster than a match loop, and the
							// /g match is so ridiculously fast that it's negligible.
							// FIXME: Repetitively calling encapsulateSelection() is probably the best strategy
							// in Firefox/Webkit, but in IE replacing the entire content once is better.
							for ( i = 0; i < match.length; i++ ) {
								index = textRemainder.indexOf( match[i] );
								if ( index === -1 ) {
									// This shouldn't happen
									break;
								}
								var matchedText = textRemainder.substr( index, match[i].length );
								textRemainder = textRemainder.substr( index + match[i].length );

								start = index + offset;
								end = start + match[i].length;
								// Make regex placeholder substitution ($1) work
								var replace = isRegex ? matchedText.replace( regex, replaceStr ) : replaceStr;
								var newEnd = start + replace.length;
								$textarea
									.textSelection( 'setSelection', { 'start': start, 'end': end } )
									.textSelection( 'encapsulateSelection', {
											'peri': replace,
											'replace': true } )
									.textSelection( 'setSelection', { 'start': start, 'end': newEnd } );
								offset = newEnd;
							}
							$( '#wikieditor-toolbar-replace-success' )
								.text( mw.msg( 'wikieditor-toolbar-tool-replace-success', match.length ) )
								.show();
							$( this ).data( 'offset', 0 );
						} else {

							if ( mode === 'replace' ) {
								var actualReplacement;

								if ( isRegex ) {
									// If backreferences (like $1) are used, the actual actual replacement string will be different
									actualReplacement = match[0].replace( regex, replaceStr );
								} else {
									actualReplacement = replaceStr;
								}

								if ( match ) {
									// Do the replacement
									$textarea.textSelection( 'encapsulateSelection', {
											'peri': actualReplacement,
											'replace': true } );
									// Reload the text after replacement
									text = $textarea.textSelection( 'getContents' );
								}

								// Find the next instance
								offset = offset + match[0].length + actualReplacement.length;
								textRemainder = text.substr( offset );
								match = textRemainder.match( regex );

								if ( match ) {
									start = offset + match.index;
									end = start + match[0].length;
								} else {
									// If no new string was found, try searching from the beginning.
									// TODO: Add a "Wrap around" option.
									textRemainder = text;
									match = textRemainder.match( regex );
									if ( match ) {
										start = match.index;
										end = start + match[0].length;
									} else {
										// Give up
										start = 0;
										end = 0;
									}
								}
							} else {
								start = offset + match.index;
								end = start + match[0].length;
							}

							$( this ).data( 'matchIndex', start );

							$textarea.textSelection( 'setSelection', {
									'start': start,
									'end': end
							} );
							$textarea.textSelection( 'scrollToCaretPosition' );
							$( this ).data( 'offset', end );
							$textarea[0].focus();
						}
					} );
				},
				dialog: {
					width: 500,
					dialogClass: 'wikiEditor-toolbar-dialog',
					modal: false,
					buttons: {
						'wikieditor-toolbar-tool-replace-button-findnext': function ( e ) {
							$( this ).closest( '.ui-dialog' ).data( 'dialogaction', e.target );
							$( this ).data( 'replaceCallback' ).call( this, 'find' );
						},
						'wikieditor-toolbar-tool-replace-button-replace': function ( e ) {
							$( this ).closest( '.ui-dialog' ).data( 'dialogaction', e.target );
							$( this ).data( 'replaceCallback' ).call( this, 'replace' );
						},
						'wikieditor-toolbar-tool-replace-button-replaceall': function ( e ) {
							$( this ).closest( '.ui-dialog' ).data( 'dialogaction', e.target );
							$( this ).data( 'replaceCallback' ).call( this, 'replaceAll' );
						},
						'wikieditor-toolbar-tool-replace-close': function () {
							$( this ).dialog( 'close' );
						}
					},
					open: function () {
						$( this ).data( 'offset', 0 );
						$( this ).data( 'matchIndex', 0 );

						$( '#wikieditor-toolbar-replace-search' ).focus();
						$( '#wikieditor-toolbar-replace-nomatch, #wikieditor-toolbar-replace-success, #wikieditor-toolbar-replace-emptysearch, #wikieditor-toolbar-replace-invalidregex' ).hide();
						if ( !( $( this ).data( 'onetimeonlystuff' ) ) ) {
							$( this ).data( 'onetimeonlystuff', true );
							// Execute the action associated with the first button
							// when the user presses Enter
							$( this ).closest( '.ui-dialog' ).keypress( function ( e ) {
								if ( ( e.keyCode || e.which ) === 13 ) {
									var button = $( this ).data( 'dialogaction' ) || $( this ).find( 'button:first' );
									button.click();
									e.preventDefault();
								}
							} );
							// Make tabbing to a button and pressing
							// Enter do what people expect
							$( this ).closest( '.ui-dialog' ).find( 'button' ).focus( function () {
								$( this ).closest( '.ui-dialog' ).data( 'dialogaction', this );
							} );
						}
						var dialog = $( this ).closest( '.ui-dialog' );
						var that = this;
						var context = $( this ).data( 'context' );
						var textbox = context.$textarea;

						$( textbox )
							.bind( 'keypress.srdialog', function ( e ) {
								if ( e.which === 13 ) {
									// Enter
									var button = dialog.data( 'dialogaction' ) || dialog.find( 'button:first' );
									button.click();
									e.preventDefault();
								} else if ( e.which === 27 ) {
									// Escape
									$( that ).dialog( 'close' );
								}
							} );
					},
					close: function () {
						var context = $( this ).data( 'context' );
						var textbox = context.$textarea;
						$( textbox ).unbind( 'keypress.srdialog' );
						$( this ).closest( '.ui-dialog' ).data( 'dialogaction', false );
					}
				}
			}
		} };
	}

};

}( jQuery, mediaWiki ) );
