/*
 * Copyright (c) 2007-2008 Nokia Corporation and/or its subsidiary(-ies).
 * All rights reserved.
 * This component and the accompanying materials are made available
 * under the terms of the License "Eclipse Public License v1.0"
 * which accompanies this distribution, and is available
 * at the URL "http://www.eclipse.org/legal/epl-v10.html".
 *
 * Initial Contributors:
 * Nokia Corporation - initial contribution.
 *
 * Contributors:
 *
 * Description: 
 *
 */

package com.nokia.ant;

import info.bliki.wiki.model.WikiModel;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.Iterator;
import java.util.List;

import org.apache.log4j.Logger;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.OutputFormat;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;

/**
 * Renders model property and group description to Wiki Model Syntax
 * 
 * @author Helium Team
 */
public class ModelPropertiesParser {
    private File inputPath;
    private File outputPath;
    private Document doc;
    private Logger log = Logger.getLogger(ModelPropertiesParser.class);

    public ModelPropertiesParser(File inputPath, File outputPath) {
        this.inputPath = inputPath;
        this.outputPath = outputPath;
    }

    /**
     * Reads model xml file, changes description format.
     * 
     * @throws DocumentException
     * @throws IOException
     */
    public void parsePropertiesDescription() throws IOException, DocumentException {
        SAXReader xmlReader = new SAXReader();
        doc = xmlReader.read(inputPath);
        List importNodes = doc.selectNodes("//description");
        for (Iterator iterator = importNodes.iterator(); iterator.hasNext();) {
            Element importCurrentNode = (Element) iterator.next();
            importCurrentNode.setText(renderWikiModel(importCurrentNode.getText()));
            writeXMLFile();
        }
    }

    /**
     * Writes Document object as xml file
     */
    private void writeXMLFile() {
        try {
            if (outputPath != null) {
                XMLWriter out = new XMLWriter(new FileOutputStream(outputPath), OutputFormat.createPrettyPrint());
                out.write(doc);
            }
        }
        catch (FileNotFoundException e) {
            // We are Ignoring the errors as no need to fail the build.
            log.debug("Not able to write into XML Document " + e.getMessage());
        }
        catch (UnsupportedEncodingException e) {
            // We are Ignoring the errors as no need to fail the build.
            log.debug("Not able to write into XML Document " + e.getMessage());
        }
        catch (IOException e) {
            // We are Ignoring the errors as no need to fail the build.
            log.debug("Not able to write into XML Document " + e.getMessage());
        }
    }

    /**
     * Render the description as Wiki model
     * 
     * @param String descriptionText
     * @return String
     */
    private String renderWikiModel(String descriptionText) throws IOException, DocumentException {
        if (descriptionText != null) {
            WikiModel wikiModel = new WikiModel("", "");
            // If description contains unwanted symbols like "**", "==" and "- -", remove those from
            // description.
            if (descriptionText.contains("**") || descriptionText.contains("==")
                || descriptionText.contains("- -")) {
                descriptionText = descriptionText.replace("**", "").replace("==", "").replace("- -", "").trim();
            }
            // If description starts with "-", remove it. As wiki have special meaning for this
            // symbol
            if (descriptionText.startsWith("-")) {
                descriptionText = descriptionText.replace("-", "");
            }
            descriptionText = descriptionText.trim();
            // Render description with wiki model syntax
            descriptionText = wikiModel.render(descriptionText);
        }
        else {
            descriptionText = "";
        }
        return descriptionText;
    }
}