/**
 * License Agreement.
 *
 * Rich Faces - Natural Ajax for Java Server Faces (JSF)
 *
 * Copyright (C) 2007 Exadel, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 2.1 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 */

package org.ajax4jsf.builder.mojo;

import java.beans.PropertyDescriptor;
import java.io.File;
import java.lang.reflect.Array;
import java.lang.reflect.InvocationTargetException;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.apache.commons.beanutils.PropertyUtils;
import org.apache.maven.artifact.Artifact;
import org.apache.maven.artifact.repository.ArtifactRepository;
import org.apache.maven.model.Parent;
import org.apache.maven.plugin.MojoExecutionException;
import org.apache.maven.plugin.MojoFailureException;
import org.apache.maven.project.MavenProject;
import org.apache.maven.project.MavenProjectBuilder;
import org.apache.maven.project.ProjectBuildingException;
import org.codehaus.plexus.PlexusConstants;
import org.codehaus.plexus.PlexusContainer;
import org.codehaus.plexus.archiver.manager.ArchiverManager;
import org.codehaus.plexus.component.repository.exception.ComponentLookupException;
import org.codehaus.plexus.context.Context;
import org.codehaus.plexus.context.ContextException;
import org.codehaus.plexus.personality.plexus.lifecycle.phase.Contextualizable;

/**
 * Compile all xml templates, matched given pattern to Java classes. Sources
 * will be created in {@link AbstractCDKMojo#outputJavaDirectory}
 * 
 * @goal compile
 * @requiresDependencyResolution compile
 * @phase generate-sources
 * @author shura
 * 
 */
public class CompileMojo extends AbstractCDKMojo implements Contextualizable {

	/**
	 * Project executed by first compile lifecycle.
	 * 
	 * @parameter expression="${executedProject}"
	 * @readonly
	 */
	private MavenProject executedProject;

	/**
	 * The reactor projects.
	 * 
	 * @parameter expression="${project.parent}"
	 * @readonly
	 */
	private MavenProject parentProject;
	/**
	 * @parameter default-value=${project.groupId}
	 */
	private String defaultPackage;

	/**
	 * A list of inclusion filters for the compiler. By default, include all
	 * files in templates directory.
	 * 
	 * @parameter
	 */
	private String[] includes;

	/**
	 * A list of exclusion filters for the compiler. None by default.
	 * 
	 * @parameter
	 */
	private String[] excludes;

	/**
	 * The local repository.
	 * 
	 * @parameter expression="${localRepository}"
	 */
	private ArtifactRepository localRepository;

	/**
	 * To look up Archiver/UnArchiver implementations
	 * 
	 * @component
	 */
	private ArchiverManager archiverManager;

	/**
	 * Project builder
	 * 
	 * @component
	 */
	private MavenProjectBuilder mavenProjectBuilder;
	private PlexusContainer container;

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.apache.maven.plugin.Mojo#execute()
	 */
	public void execute() throws MojoExecutionException, MojoFailureException {

		// VelocityTemplates.init();
		try {
			List components = container
					.lookupList("org.ajax4jsf.templatecompiler.elements.ElementsFactory");
			for (Iterator iter = components.iterator(); iter.hasNext();) {
				Object element = iter.next();
				System.out.println(element.getClass().getName());

			}
			System.out.println("Components Map");
			Map componentsMap = container
					.lookupMap("org.ajax4jsf.templatecompiler.elements.ElementsFactory");
			for (Iterator iter = componentsMap.entrySet().iterator(); iter
					.hasNext();) {
				Map.Entry element = (Map.Entry) iter.next();
				System.out.println(element.getKey() + ":"
						+ element.getValue().getClass().getName());
			}
		} catch (ComponentLookupException e) {
			throw new MojoExecutionException(
					"Error lookup ElementFactory components");
		}
		Parent parentModel = project.getModel().getParent();
		if (null != parentModel) {
			String relativePath = parentModel.getRelativePath();
			File parentPom = new File(project.getFile().getParentFile(), relativePath);
			if (parentPom.isDirectory()) {
				parentPom = new File(parentPom, "pom.xml");
			}
			if (parentPom.exists()) {
				try {
					parentProject = mavenProjectBuilder.build(parentPom,
							localRepository, null);
				} catch (ProjectBuildingException e) {
					throw new MojoExecutionException("Error get parent project for a components library",e);
				}
			} else {
				throw new MojoFailureException("Parent project pom file "+parentPom.getAbsolutePath()+" is not found for a components library");					
			}
		}else {
			throw new MojoFailureException("Components library project must have parent pom with components modules");
		}
		getLog().info("Parent Project object :\n" + toLog(parentProject) + "\n");
		getLog().info("Project object :\n" + toLog(project) + "\n");
		getLog().info("Project object Model :\n" + toLog(project.getModel()) + "\n");
		getLog().info("Project object Parent Model :\n" + toLog(project.getModel().getParent()) + "\n");
		
		getLog().info(
				"Executed Project object :\n" + toLog(executedProject) + "\n");
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.codehaus.plexus.personality.plexus.lifecycle.phase.Contextualizable#contextualize(org.codehaus.plexus.context.Context)
	 */
	public void contextualize(Context context) throws ContextException {
		this.container = (PlexusContainer) context
				.get(PlexusConstants.PLEXUS_KEY);

	}

	private void logBean(Object bean) {
		StringBuffer content = new StringBuffer();
	}

	/**
	 * Convert any Java Object to JavaScript representation ( as possible ).
	 * 
	 * @param obj
	 * @return
	 * @throws MojoExecutionException
	 */
	public String toLog(Object obj) throws MojoExecutionException {
		if (null == obj) {
			return "null";
		} else if (obj.getClass().isArray()) {
			StringBuffer ret = new StringBuffer("[");
			boolean first = true;
			for (int i = 0; i < Array.getLength(obj); i++) {
				Object element = Array.get(obj, i);
				if (!first) {
					ret.append(',');
				}
				ret.append(toLog(element));
				first = false;
			}
			return ret.append("]\n").toString();
		} else if (obj instanceof Collection) {
			// Collections put as JavaScript array.
			Collection collection = (Collection) obj;
			StringBuffer ret = new StringBuffer("[");
			boolean first = true;
			for (Iterator iter = collection.iterator(); iter.hasNext();) {
				Object element = iter.next();
				if (!first) {
					ret.append(',');
				}
				ret.append(toLog(element));
				first = false;
			}
			return ret.append("]\n").toString();
		} else if (obj instanceof Map) {
			// Maps put as JavaScript hash.
			Map map = (Map) obj;

			StringBuffer ret = new StringBuffer("{");
			boolean first = true;
			for (Iterator iter = map.keySet().iterator(); iter.hasNext();) {
				Object key = (Object) iter.next();
				if (!first) {
					ret.append(',');
				}
				ret.append(key);
				ret.append(":");
				ret.append(toLog(map.get(key)));
				first = false;
			}
			return ret.append("}\n").toString();
		} else if (obj instanceof Number || obj instanceof Boolean) {
			// numbers and boolean put as-is, without conversion
			return obj.toString();
		} else if (obj instanceof String) {
			// all other put as encoded strings.
			StringBuffer ret = new StringBuffer();
			addEncodedString(ret, obj);
			return ret.append("\n").toString();
		}
		// All other objects threaded as Java Beans.
		try {
			StringBuffer ret = new StringBuffer("{");
			PropertyDescriptor[] propertyDescriptors = PropertyUtils
					.getPropertyDescriptors(obj);
			boolean first = true;
			for (int i = 0; i < propertyDescriptors.length; i++) {
				PropertyDescriptor propertyDescriptor = propertyDescriptors[i];
				String key = propertyDescriptor.getName();
				if ("class".equals(key)
						|| propertyDescriptor.getReadMethod() == null) {
					continue;
				}
				if (!first) {
					ret.append(",\n\t");
				}
				addEncodedString(ret, key);
				ret.append(":");
				try {
					ret.append(String.valueOf(PropertyUtils.getProperty(obj,
							key)));

				} catch (InvocationTargetException e) {
					ret.append("Not ACCESIBLE");
				}// ret.append(toLog(PropertyUtils.getProperty(obj, key)));
				first = false;
			}
			return ret.append("}\n").toString();
		} catch (Exception e) {
			throw new MojoExecutionException(
					"Error in conversion Java Object to String", e);
		}
	}

	public void addEncodedString(StringBuffer buff, Object obj) {
		buff.append("'");
		buff.append(obj);
		buff.append("'");

	}

}
