/*

 * 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.helium.antlint.ant.types;

import java.io.File;

import java.io.FileOutputStream;

import java.io.PrintWriter;

import java.util.ArrayList;

import java.util.List;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

import org.apache.tools.ant.BuildException;

import org.dom4j.Document;

import org.dom4j.DocumentException;

import org.dom4j.Element;

import org.dom4j.Node;

import org.dom4j.io.SAXReader;

import com.nokia.helium.antlint.ant.AntlintException;

/**

 * <code>CheckScriptDef</code> is used to check the coding convention in

 * scriptdef.

 * 

 * <pre>

 * Usage:

 * 

 *  <antlint>

 *       <fileset id="antlint.files" dir="${antlint.test.dir}/data">

 *               <include name="*.ant.xml"/>

 *               <include name="*build.xml"/>

 *               <include name="*.antlib.xml"/>

 *       </fileset>

 *       <CheckScriptDef" severity="error" enabled="true" outputDir="${antlint.test.dir}/output"/>

 *  </antlint>

 * </pre>

 * 

 * @ant.task name="CheckScriptDef" category="AntLint"

 * 

 */

public class CheckScriptDef extends AbstractScriptCheck {

    private File outputDir;

    private File antFile;

    /**

     * {@inheritDoc}

     */

    public void run(Element node) {

        if (node.getName().equals("scriptdef")) {

            String scriptdefname = node.attributeValue("name");

            String language = node.attributeValue("language");

            checkScriptDef(scriptdefname, node);

            if (language.equals("beanshell")) {

                writeBeanshellFile(scriptdefname, node.getText());

            }

        }

    }

    /**

     * Check against the given node.

     * 

     * @param node

     *            is the node to check.

     */

    @SuppressWarnings("unchecked")

    public void checkScriptDef(String name, Node node) {

        List<Node> statements = node.selectNodes("//scriptdef[@name='" + name

                + "']/attribute");

        Pattern p1 = Pattern.compile("attributes.get\\([\"']([^\"']*)[\"']\\)");

        Matcher m1 = p1.matcher(node.getText());

        ArrayList<String> props = new ArrayList<String>();

        while (m1.find()) {

            props.add(m1.group(1));

        }

        if (!statements.isEmpty() && !props.isEmpty()) {

            for (Node statement : statements) {

                if (!props.contains(statement.valueOf("@name"))) {

                    this.getReporter().report(

                            this.getSeverity(),

                            "Scriptdef " + name + " does not use "

                                    + statement.valueOf("@name"),

                            this.getAntFile(), 0);

                }

            }

        }

    }

    /**

     * Write a bean shell file with the given text.

     * 

     * @param scriptdefname

     *            is the name of the file to be written.

     * @param text

     *            is the text to be written inside the file.

     */

    private void writeBeanshellFile(String scriptdefname, String text) {

        if (getOutputDir() == null) {

            throw new BuildException("'output' attribute for the checker '"

                    + this.toString() + "' should be specified.");

        }

        scriptdefname = "Beanshell" + scriptdefname;

        try {

            String heliumpath = getOutputDir().getCanonicalPath();

            new File(heliumpath + File.separator + "beanshell").mkdirs();

            File file = new File(heliumpath + File.separator + "beanshell"

                    + File.separator + scriptdefname + ".java");

            PrintWriter output = new PrintWriter(new FileOutputStream(file));

            for (String line : text.split("\n")) {

                    output.write(line + "\n");

            }

            output.write("/**\n * x\n */\npublic final class " + scriptdefname

                    + " {\n");

            for (String line : text.split("\n")) {

            }

            output.close();

        } catch (IOException e) {

            throw new BuildException("Not able to write Beanshell File "

                    + scriptdefname + ".java");

        }

    }

    /*

     * (non-Javadoc)

     * 

     * @see com.nokia.helium.antlint.ant.types.Check#run(java.io.File)

     */

    public void run(File antFilename) throws AntlintException {

        List<Element> scriptDefNodes = new ArrayList<Element>();

        this.antFile = antFilename;

        SAXReader saxReader = new SAXReader();

        Document doc;

        try {

            doc = saxReader.read(antFilename);

            elementTreeWalk(doc.getRootElement(), "scriptdef", scriptDefNodes);

        } catch (DocumentException e) {

            throw new AntlintException("Invalid XML file " + e.getMessage());

        }

        for (Element scriptDefNode : scriptDefNodes) {

            run(scriptDefNode);

        }

    }

    /**

     * @param outputDir

     *            the outputDir to set

     */

    public void setOutputDir(File outputDir) {

        this.outputDir = outputDir;

    }

    /**

     * @return the outputDir

     */

    public File getOutputDir() {

        return outputDir;

    }

    /*

     * (non-Javadoc)

     * 

     * @see org.apache.tools.ant.types.DataType#toString()

     */

    public String toString() {

        return "CheckScriptDef";

    }

    /*

     * (non-Javadoc)

     * 

     * @see com.nokia.helium.antlint.ant.types.Check#getAntFile()

     */

    public File getAntFile() {

        return this.antFile;

    }

}