/* 
Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
specific language governing permissions and limitations
under the License.
*/

package org.odftoolkit.simple.text.list;

import java.util.logging.Level;
import java.util.logging.Logger;

import org.odftoolkit.odfdom.dom.OdfContentDom;
import org.odftoolkit.odfdom.dom.element.style.StyleListLevelPropertiesElement;
import org.odftoolkit.odfdom.dom.element.style.StyleTextPropertiesElement;
import org.odftoolkit.odfdom.dom.element.text.TextListElement;
import org.odftoolkit.odfdom.dom.element.text.TextListItemElement;
import org.odftoolkit.odfdom.dom.element.text.TextListLevelStyleBulletElement;
import org.odftoolkit.odfdom.dom.element.text.TextPElement;
import org.odftoolkit.odfdom.dom.style.OdfStyleFamily;
import org.odftoolkit.odfdom.incubator.doc.office.OdfOfficeAutomaticStyles;
import org.odftoolkit.odfdom.incubator.doc.office.OdfOfficeStyles;
import org.odftoolkit.odfdom.incubator.doc.style.OdfStyle;
import org.odftoolkit.odfdom.incubator.doc.text.OdfTextListStyle;
import org.odftoolkit.simple.Document;
import org.w3c.dom.Node;

/**
 * BulletDecorator is an implementation of the ListDecorator interface,
 * decorates a given List as bullet list. User can extend this class and realize
 * their own list and list item style. For example, set a specifies list item
 * with red color.
 * <p>
 * A BulletDecorator can be reused in the same Document.
 * 
 * @since 0.4
 */
public class BulletDecorator implements ListDecorator {

	private static String[] DEFAULT_TEXT_SPACE_BEFORE_ATTRIBUTES = { null, "0.401cm", "0.799cm", "1.2cm", "1.6cm",
			"2.001cm", "2.399cm", "2.8cm", "3.2cm", "3.601cm" };
	private static String DEFAULT_TEXT_MIN_LABEL_WIDTH = "0.4cm";
	private static String DEFAULT_FONT_NAME = "Tahoma";
	private static String DEFAULT_BULLET_CHAR = "•";
	private static String DEFAULT_NAME = "Simple_Default_Bullet_List";

	private OdfTextListStyle listStyle;
	private OdfStyle paragraphStyle;
	private OdfOfficeAutomaticStyles styles;

	/**
	 * Constructor with Document.
	 * 
	 * @param doc
	 *            the Document which this BulletDecorator will be used on.
	 */
	public BulletDecorator(Document doc) {
		OdfContentDom contentDocument;
		try {
			contentDocument = doc.getContentDom();
			styles = contentDocument.getAutomaticStyles();
			OdfOfficeStyles documentStyles = doc.getDocumentStyles();
			listStyle = styles.getListStyle(DEFAULT_NAME);
			// create bullet style
			if (listStyle == null) {
				listStyle = styles.newListStyle();
				// <style:style style:name="Numbering_20_Symbols"
				// style:display-name="Numbering Symbols" style:family="text" />
				getOrCreateStyleByName(documentStyles, styles, "Bullet_20_Symbols", OdfStyleFamily.Text);
				for (int i = 0; i < 10; i++) {
					TextListLevelStyleBulletElement listLevelElement = listStyle.newTextListLevelStyleBulletElement(
							DEFAULT_BULLET_CHAR, i + 1);
					// get from default style element
					listLevelElement.setTextStyleNameAttribute("Bullet_20_Symbols");
					StyleListLevelPropertiesElement styleListLevelPropertiesElement = listLevelElement
							.newStyleListLevelPropertiesElement();
					if (DEFAULT_TEXT_SPACE_BEFORE_ATTRIBUTES[i] != null) {
						styleListLevelPropertiesElement
								.setTextSpaceBeforeAttribute(DEFAULT_TEXT_SPACE_BEFORE_ATTRIBUTES[i]);
					}
					styleListLevelPropertiesElement.setTextMinLabelWidthAttribute(DEFAULT_TEXT_MIN_LABEL_WIDTH);
					StyleTextPropertiesElement styleTextPropertiesElement = listLevelElement
							.newStyleTextPropertiesElement("true");
					styleTextPropertiesElement.setStyleFontNameAttribute(DEFAULT_FONT_NAME);
				}
				// listStyle.setStyleNameAttribute(DEFAULT_NAME);
			}
			// create default paragraph style
			// <style:style style:name="P3" style:family="paragraph"
			// style:parent-style-name="Default_20_Text"
			// style:list-style-name="L1"
			// />
			paragraphStyle = styles.newStyle(OdfStyleFamily.Paragraph);
			// <style:style style:name="Default_20_Text"
			// style:display-name="Default Text" style:family="paragraph"
			// style:class="text" />
			// <style:style style:name="Standard" style:family="paragraph"
			// style:class="text" />
			getOrCreateStyleByName(documentStyles, styles, "Default_20_Text", OdfStyleFamily.Paragraph);
			paragraphStyle.setStyleParentStyleNameAttribute("Default_20_Text");
			paragraphStyle.setStyleListStyleNameAttribute(listStyle.getStyleNameAttribute());
		} catch (Exception e) {
			Logger.getLogger(BulletDecorator.class.getName()).log(Level.SEVERE, null, e);
		}
	}
	
	public void decorateList(List list) {
		TextListElement listElement = list.getOdfElement();
		listElement.setTextStyleNameAttribute(listStyle.getStyleNameAttribute());
	}

	public void decorateListItem(ListItem item) {
		TextListItemElement listItemElement = item.getOdfElement();
		Node child = listItemElement.getFirstChild();
		while (child != null) {
			if (child instanceof TextPElement) {
				TextPElement pElement = (TextPElement) child;
				// user can realize defined style for specifies item.
				/*
				 * if (pElement.getTextContent().contains("item1")) { OdfStyle
				 * sParagraphStyle = styles.newStyle(OdfStyleFamily.Paragraph);
				 * sParagraphStyle
				 * .setStyleParentStyleNameAttribute("Default_20_Text");
				 * sParagraphStyle
				 * .newStyleTextPropertiesElement(null).setFoColorAttribute
				 * ("#ff3333");
				 * pElement.setTextStyleNameAttribute(sParagraphStyle
				 * .getStyleNameAttribute()); } else
				 */
				pElement.setTextStyleNameAttribute(paragraphStyle.getStyleNameAttribute());
			}
			child = child.getNextSibling();
		}
	}

	public ListType getListType() {
		return ListType.BULLET;
	}

	private OdfStyle getOrCreateStyleByName(OdfOfficeStyles documentStyles, OdfOfficeAutomaticStyles styles,
			String styleName, OdfStyleFamily styleFamily) {
		OdfStyle odfStyle = documentStyles.getStyle(styleName, styleFamily);
		if (odfStyle == null) {
			styles.getStyle(styleName, styleFamily);
		}
		if (odfStyle == null) {
			odfStyle = styles.newStyle(styleFamily);
			odfStyle.setStyleNameAttribute(styleName);
			odfStyle.setStyleDisplayNameAttribute(styleName);
		}
		return odfStyle;
	}
}