/*************************************************************************************
 * Copyright (c) 2008-2014 Red Hat, Inc. and others.
 * 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:
 *     JBoss by Red Hat - Initial implementation.
 ************************************************************************************/
package org.jboss.tools.portlet.ui;

import static org.eclipse.wst.common.componentcore.internal.operation.IArtifactEditOperationDataModelProperties.PROJECT_NAME;

import java.io.File;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Status;
import org.eclipse.jem.util.emf.workbench.ProjectUtilities;
import org.eclipse.ui.plugin.AbstractUIPlugin;
import org.eclipse.wst.common.componentcore.ComponentCore;
import org.eclipse.wst.common.componentcore.internal.util.IModuleConstants;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualFile;
import org.eclipse.wst.common.frameworks.datamodel.IDataModel;
import org.eclipse.wst.common.project.facet.core.IFacetedProject;
import org.eclipse.wst.common.project.facet.core.IFacetedProjectBase;
import org.eclipse.wst.common.project.facet.core.IProjectFacet;
import org.eclipse.wst.common.project.facet.core.ProjectFacetsManager;
import org.eclipse.wst.server.core.IRuntime;
import org.eclipse.wst.sse.core.StructuredModelManager;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocumentRegion;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMModel;
import org.eclipse.wst.xml.core.internal.provisional.document.IDOMNode;
import org.jboss.ide.eclipse.as.core.server.IJBossServerConstants;
import org.jboss.ide.eclipse.as.core.server.IJBossServerRuntime;
import org.jboss.tools.portlet.core.IPortletConstants;
import org.jboss.tools.portlet.core.PortletCoreActivator;
import org.osgi.framework.BundleContext;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

/**
 * The activator class controls the plug-in life cycle
 * 
 * @author snjeza
 */
public class PortletUIActivator extends AbstractUIPlugin {

	// The plug-in ID
	public static final String PLUGIN_ID = "org.jboss.tools.portlet.ui"; //$NON-NLS-1$

	// The shared instance
	private static PortletUIActivator plugin;
	
	/**
	 * The constructor
	 */
	public PortletUIActivator() {
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#start(org.osgi.framework.BundleContext)
	 */
	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
	}

	/*
	 * (non-Javadoc)
	 * @see org.eclipse.ui.plugin.AbstractUIPlugin#stop(org.osgi.framework.BundleContext)
	 */
	public void stop(BundleContext context) throws Exception {
		plugin = null;
		super.stop(context);
	}

	/**
	 * Returns the shared instance
	 *
	 * @return the shared instance
	 */
	public static PortletUIActivator getDefault() {
		return plugin;
	}
	
	public static IFile getPortletXmlFile(IProject project) {
		try {
			if (project == null || !project.hasNature(IModuleConstants.MODULE_NATURE_ID)) {
				return null;
			}
		} catch (CoreException e) {
			log(e);
			return null;
		}
		IVirtualComponent component = ComponentCore.createComponent(project);
		IVirtualFile portletVirtualFile = component.getRootFolder().getFile(
				IPortletConstants.CONFIG_PATH);

		if (!portletVirtualFile.getUnderlyingFile().exists()) {
			//log(new RuntimeException(Messages.PortletUIActivator_The_portlet_xml_file_doesnt_exist));
			return null;
		}

		IFile portletFile = portletVirtualFile.getUnderlyingFile();
		return portletFile;
	}

	public static void log(Exception e, String message) {
		IStatus status = new Status(IStatus.ERROR,PLUGIN_ID,message,e);
		PortletCoreActivator.getDefault().getLog().log(status);
	}
	
	public static void log(Throwable e) {
		IStatus status = new Status(IStatus.ERROR,PLUGIN_ID,e.getLocalizedMessage(),e);
		PortletCoreActivator.getDefault().getLog().log(status);
	}

	public static boolean isPortletProject(IDataModel model) {
		String projectName = model.getStringProperty(PROJECT_NAME);
		if(projectName != null && !"".equals(projectName.trim())){ //$NON-NLS-1$
			IProject project = ProjectUtilities.getProject(projectName);
			try {
				IFacetedProject facetedProject = ProjectFacetsManager.create(project);
				return facetedProject != null && facetedProject.hasProjectFacet(getPortletFacet());
			} catch (CoreException e) {
				PortletUIActivator.log(e);
			}
		}
		return false;
	}
	
	private static IPath getJBossConfigPath(IDataModel model) {
		String projectName = model.getStringProperty(PROJECT_NAME);
		if(projectName != null && !"".equals(projectName.trim())) { //$NON-NLS-1$
			IProject project = ProjectUtilities.getProject(projectName);
			try {
				IFacetedProject facetedProject = ProjectFacetsManager.create(project);
				return getJBossConfigPath(facetedProject);
			} catch (CoreException e) {
				PortletUIActivator.log(e);
			}
		}
		return null;
	}
	
	public static IPath getJBossConfigPath(IFacetedProjectBase facetedProject) {
		if (facetedProject != null) {
			org.eclipse.wst.common.project.facet.core.runtime.IRuntime facetRuntime = facetedProject.getPrimaryRuntime();
			if (facetRuntime == null) {
				return null;
			}
			IRuntime runtime = PortletCoreActivator.getRuntime(facetRuntime);
			if (runtime == null) {
				return null;
			}
			IJBossServerRuntime jbossRuntime = (IJBossServerRuntime)runtime.loadAdapter(IJBossServerRuntime.class, new NullProgressMonitor());
			if (jbossRuntime == null) {
				return null;
			}
			IPath jbossLocation = runtime.getLocation();
			IPath configPath = jbossLocation.append(IJBossServerConstants.SERVER).append(jbossRuntime.getJBossConfiguration());
			return configPath;
		}
		return null;
	}
	
	public static boolean isJBossPortalRuntime(IDataModel model) {
		IPath configPath = getJBossConfigPath(model);
		if (configPath == null) {
			return false;
		}
		IPath portalPath = configPath.append(IPortletConstants.SERVER_DEFAULT_DEPLOY_JBOSS_PORTAL_SAR);
		File portalFile = portalPath.toFile();
		if (portalFile != null && portalFile.exists()) {
			return true;
		}
		portalPath = configPath.append(IPortletConstants.SERVER_DEFAULT_DEPLOY_JBOSS_PORTAL_HA_SAR);
		portalFile = portalPath.toFile();
		if (portalFile != null && portalFile.exists()) {
			return true;
		}
		return false;
	}
	
	public static boolean isGateIn(IDataModel model) {
		IPath configPath = getJBossConfigPath(model);
		if (configPath == null) {
			return false;
		}
		IPath portalPath = configPath.append(IPortletConstants.SERVER_DEFAULT_DEPLOY_GATEIN);
		File portalFile = portalPath.toFile();
		if (portalFile != null && portalFile.exists()) {
			return true;
		}
		return false;
	}
	
	private static IProjectFacet getPortletFacet() {
		try {
			return ProjectFacetsManager.getProjectFacet(IPortletConstants.PORTLET_FACET_ID);
		} catch (IllegalArgumentException e) {
			return null;
		}
	}

	public static Set<String> getPortletNames(IFile portletFile) {
		Set<String> portletNames = new HashSet<String>();
		if (portletFile == null || !portletFile.exists()) {
			return portletNames;
		}
		IDOMModel domModel = null;
		try {
			domModel = (IDOMModel) StructuredModelManager.getModelManager()
					.getModelForRead(portletFile);
			Document document = domModel.getDocument();
			NodeList portlets = document.getElementsByTagName("portlet-name"); //$NON-NLS-1$
			if (portlets == null || portlets.getLength() == 0) {
				return portletNames;
			}
			for (int i = 0; i < portlets.getLength(); i++) {
				Node node = portlets.item(i);
				NodeList children = node.getChildNodes();
				if (children == null || children.getLength() != 1) {
					continue;
				}
				Node child = children.item(0);
				if (child == null || Node.TEXT_NODE != child.getNodeType()) {
					continue;
				}
				IStructuredDocumentRegion structuredDocumentRegion = ((IDOMNode) child)
						.getFirstStructuredDocumentRegion();
				String value = structuredDocumentRegion.getFullText();
				if (value == null) {
					continue;
				}
				portletNames.add(value.trim());
			}
		} catch (Exception e) {
			PortletCoreActivator.log(e);
		} finally {
			if (domModel != null) {
				domModel.releaseFromRead();
			}
		}
		return portletNames;
	}
}
