/**
 * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
 */

( function() {
	function getListElement( editor, listTag ) {
		var range;
		try {
			range = editor.getSelection().getRanges()[ 0 ];
		} catch ( e ) {
			return null;
		}

		range.shrink( CKEDITOR.SHRINK_TEXT );
		return editor.elementPath( range.getCommonAncestor() ).contains( listTag, 1 );
	}

	var listItem = function( node ) {
			return node.type == CKEDITOR.NODE_ELEMENT && node.is( 'li' );
		};

	var mapListStyle = {
		'a': 'lower-alpha',
		'A': 'upper-alpha',
		'i': 'lower-roman',
		'I': 'upper-roman',
		'1': 'decimal',
		'disc': 'disc',
		'circle': 'circle',
		'square': 'square'
	};

	function listStyle( editor, startupPage ) {
		var lang = editor.lang.liststyle;
		if ( startupPage == 'bulletedListStyle' ) {
			return {
				title: lang.bulletedTitle,
				minWidth: 300,
				minHeight: 50,
				contents: [ {
					id: 'info',
					accessKey: 'I',
					elements: [ {
						type: 'select',
						label: lang.type,
						id: 'type',
						align: 'center',
						style: 'width:150px',
						items: [
							[ lang.notset, '' ],
							[ lang.circle, 'circle' ],
							[ lang.disc, 'disc' ],
							[ lang.square, 'square' ]
						],
						setup: function( element ) {
							var value = element.getStyle( 'list-style-type' ) || mapListStyle[ element.getAttribute( 'type' ) ] || element.getAttribute( 'type' ) || '';

							this.setValue( value );
						},
						commit: function( element ) {
							var value = this.getValue();
							if ( value )
								element.setStyle( 'list-style-type', value );
							else
								element.removeStyle( 'list-style-type' );
						}
					} ]
				} ],
				onShow: function() {
					var editor = this.getParentEditor(),
						element = getListElement( editor, 'ul' );

					element && this.setupContent( element );
				},
				onOk: function() {
					var editor = this.getParentEditor(),
						element = getListElement( editor, 'ul' );

					element && this.commitContent( element );
				}
			};
		} else if ( startupPage == 'numberedListStyle' ) {

			var listStyleOptions = [
				[ lang.notset, '' ],
				[ lang.lowerRoman, 'lower-roman' ],
				[ lang.upperRoman, 'upper-roman' ],
				[ lang.lowerAlpha, 'lower-alpha' ],
				[ lang.upperAlpha, 'upper-alpha' ],
				[ lang.decimal, 'decimal' ]
			];

			return {
				title: lang.numberedTitle,
				minWidth: 300,
				minHeight: 50,
				contents: [ {
					id: 'info',
					accessKey: 'I',
					elements: [ {
						type: 'hbox',
						widths: [ '25%', '75%' ],
						children: [ {
							label: lang.start,
							type: 'text',
							id: 'start',
							validate: CKEDITOR.dialog.validate.integer( lang.validateStartNumber ),
							setup: function( element ) {
								// List item start number dominates.
								var value = element.getFirst( listItem ).getAttribute( 'value' ) || element.getAttribute( 'start' ) || 1;
								value && this.setValue( value );
							},
							commit: function( element ) {
								var firstItem = element.getFirst( listItem );
								var oldStart = firstItem.getAttribute( 'value' ) || element.getAttribute( 'start' ) || 1;

								// Force start number on list root.
								element.getFirst( listItem ).removeAttribute( 'value' );
								var val = parseInt( this.getValue(), 10 );
								if ( isNaN( val ) )
									element.removeAttribute( 'start' );
								else
									element.setAttribute( 'start', val );

								// Update consequent list item numbering.
								var nextItem = firstItem,
									conseq = oldStart,
									startNumber = isNaN( val ) ? 1 : val;
								while ( ( nextItem = nextItem.getNext( listItem ) ) && conseq++ ) {
									if ( nextItem.getAttribute( 'value' ) == conseq )
										nextItem.setAttribute( 'value', startNumber + conseq - oldStart );
								}
							}
						},
						{
							type: 'select',
							label: lang.type,
							id: 'type',
							style: 'width: 100%;',
							items: listStyleOptions,
							setup: function( element ) {
								var value = element.getStyle( 'list-style-type' ) || mapListStyle[ element.getAttribute( 'type' ) ] || element.getAttribute( 'type' ) || '';

								this.setValue( value );
							},
							commit: function( element ) {
								var value = this.getValue();
								if ( value )
									element.setStyle( 'list-style-type', value );
								else
									element.removeStyle( 'list-style-type' );
							}
						} ]
					} ]
				} ],
				onShow: function() {
					var editor = this.getParentEditor(),
						element = getListElement( editor, 'ol' );

					element && this.setupContent( element );
				},
				onOk: function() {
					var editor = this.getParentEditor(),
						element = getListElement( editor, 'ol' );

					element && this.commitContent( element );
				}
			};
		}
	}

	CKEDITOR.dialog.add( 'numberedListStyle', function( editor ) {
		return listStyle( editor, 'numberedListStyle' );
	} );

	CKEDITOR.dialog.add( 'bulletedListStyle', function( editor ) {
		return listStyle( editor, 'bulletedListStyle' );
	} );
} )();
