/*******************************************************************************
 * Copyright (c) 2011, 2013 Formal Mind GmbH and University of Dusseldorf.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Lukas Ladenberger - initial API and implementation
 ******************************************************************************/
package org.eclipse.rmf.reqif10.common.util;

import java.io.IOException;
import java.io.StringWriter;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.util.FeatureMapUtil;
import org.eclipse.emf.ecore.xmi.XMLResource;
import org.eclipse.emf.ecore.xmi.impl.XMLResourceImpl;
import org.eclipse.rmf.reqif10.XhtmlContent;
import org.eclipse.rmf.reqif10.xhtml.XhtmlDivType;
import org.eclipse.rmf.reqif10.xhtml.XhtmlFactory;

/**
 * @author Lukas Ladenberger
 */
public class ProrXhtmlSimplifiedHelper {

	private static String newLine = System.getProperty("line.separator");

	/**
	 * This static method returns the XML representation as string.
	 */
	public static String generateXMLString(EObject eobject) throws IOException {
		StringWriter sw = new StringWriter();
		Map<Object, Object> options = new HashMap<Object, Object>();
		options.put(XMLResource.OPTION_ROOT_OBJECTS,
				Collections.singletonList(eobject));
		options.put(XMLResource.OPTION_EXTENDED_META_DATA, Boolean.TRUE);
		options.put(XMLResource.OPTION_DECLARE_XML, Boolean.TRUE);
		options.put(XMLResource.OPTION_SAVE_TYPE_INFORMATION, Boolean.FALSE);
		options.put(XMLResource.OPTION_USE_ENCODED_ATTRIBUTE_STYLE,
				Boolean.FALSE);
		XMLResourceImpl ri = new XMLResourceImpl();
		ri.save(sw, options);
		return sw.toString();
	}

	/**
	 * This static method returns the simplified version of the
	 * {@link XhtmlContent}.
	 */
	public static String xhtmlToSimplifiedString(XhtmlContent xhtmlContent) {
		String stringValue = "";
		try {
			stringValue = generateXMLString(xhtmlContent);
			stringValue = stringValue.replaceAll(newLine, "");
			stringValue = stringValue.replaceAll(" +", " ");
			stringValue = stringValue.replaceAll("\\<xhtml:br/\\>", newLine);
			stringValue = stringValue.replaceAll("\\</xhtml:p\\>", newLine
					+ newLine);
			stringValue = stringValue.replaceAll("\\<xhtml:li\\>", "- ");
			stringValue = stringValue.replaceAll("\\<xhtml:ul\\>", newLine);
			stringValue = stringValue.replaceAll("\\</xhtml:ul\\>", newLine);
			stringValue = stringValue.replaceAll("\\<xhtml:ol\\>", newLine);
			stringValue = stringValue.replaceAll("\\</xhtml:ol\\>", newLine);
			stringValue = stringValue.replaceAll("\\</xhtml:li\\>", newLine);
			stringValue = stringValue.replaceAll("\\</xhtml:div\\>", newLine);
			stringValue = stringValue.replaceAll("\\<.*?\\>", " ");
			stringValue = stringValue.trim();
		} catch (IOException e) {
		}
		return stringValue;
	}
	
	/**
	 * This static method returns the simplified version of the
	 * {@link XhtmlContent}.
	 */
	public static XhtmlDivType stringToSimplifiedXhtml(String str) {
		XhtmlDivType div = XhtmlFactory.eINSTANCE.createXhtmlDivType();
		String[] split = str.split("\\r\\n|\\r|\\n");
		for (int i = 0; i < split.length; i++) {
			String br = split[i];
			FeatureMapUtil.addText(div.getMixed(), br);
			if (i < split.length - 1)
				div.getBr().add(XhtmlFactory.eINSTANCE.createXhtmlBrType());
		}
		return div;
	}

	/**
	 * 
	 * A very simplified version to check if the given {@link XhtmlContent}
	 * object is a formatted attribute. Or in other words: This method checks if
	 * the {@link XhtmlContent} object comes from ProR, if so return that the
	 * object is no formatted attribute.
	 * 
	 * @param xhtmlContent
	 * @return
	 */
	public static boolean isFormattedAttribute(XhtmlContent xhtmlContent) {

		try {
			String xhtmlString = ReqIF10XhtmlUtil.getXhtmlString(xhtmlContent);

			if (xhtmlString != null) {

				String stringValue = xhtmlString.replaceAll("\\<xhtml:br/\\>",
						"");
				stringValue = stringValue
						.replaceAll(
								"\\<xhtml:div xmlns:xhtml=\"http://www.w3.org/1999/xhtml\"\\>",
								" ");
				stringValue = stringValue.replaceAll("\\</xhtml:div\\>", "");
				stringValue = stringValue.replaceAll(newLine, "");
				stringValue = stringValue.replaceAll(" ", "");

				if (stringValue.contains("<xhtml:"))
					return true;

			}

		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		return false;

	}

}