/******************************************************************************
 * Copyright (c) 2005 BEA Systems, Inc.
 * 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:
 *    Konstantin Komissarchik - initial API and implementation
 ******************************************************************************/

package org.eclipse.jst.j2ee.web.project.facet;

import java.lang.reflect.InvocationTargetException;

import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jem.util.logger.proxy.Logger;
import org.eclipse.jst.common.project.facet.WtpUtils;
import org.eclipse.jst.j2ee.internal.common.J2EEVersionUtil;
import org.eclipse.jst.j2ee.project.facet.J2EEFacetInstallDelegate;
import org.eclipse.jst.j2ee.web.componentcore.util.WebArtifactEdit;
import org.eclipse.wst.common.componentcore.ComponentCore;
import org.eclipse.wst.common.componentcore.datamodel.properties.IFacetDataModelProperties;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualFolder;
import org.eclipse.wst.common.frameworks.datamodel.IDataModel;
import org.eclipse.wst.common.project.facet.core.IDelegate;
import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;
import org.eclipse.wst.common.project.facet.core.runtime.classpath.ClasspathHelper;

public final class WebFacetInstallDelegate extends J2EEFacetInstallDelegate implements IDelegate {

	private static final String WEB_LIB_CONTAINER = "org.eclipse.jst.j2ee.internal.web.container";


	public void execute(final IProject project, final IProjectFacetVersion fv, final Object cfg, final IProgressMonitor monitor) throws CoreException {
		if (monitor != null) {
			monitor.beginTask("", 1);
		}

		try {
			IDataModel model = (IDataModel) cfg;

			final IJavaProject jproj = JavaCore.create(project);

			// Add WTP natures.

			WtpUtils.addNatures(project);

			// Create the directory structure.

			final IWorkspace ws = ResourcesPlugin.getWorkspace();
			final IPath pjpath = project.getFullPath();

			final IPath contentdir = pjpath.append(model.getStringProperty(IWebFacetInstallDataModelProperties.CONTENT_DIR));
			mkdirs(ws.getRoot().getFolder(contentdir));

			final IPath webinf = contentdir.append("WEB-INF");
			IFolder webinfFolder = ws.getRoot().getFolder(webinf);
			mkdirs(webinfFolder);

			final IPath webinflib = webinf.append("lib");
			mkdirs(ws.getRoot().getFolder(webinflib));

			try {
				createManifest(project, model.getStringProperty(IWebFacetInstallDataModelProperties.CONTENT_DIR), monitor);
			} catch (InvocationTargetException e) {
				Logger.getLogger().logError(e);
			} catch (InterruptedException e) {
				Logger.getLogger().logError(e);
			}

			// Setup WEB-INF/src, if necessary.

			if (model.getBooleanProperty(IWebFacetInstallDataModelProperties.CREATE_WEB_INF_SRC)) {
				final IPath webinfsrc = webinf.append("src");
				mkdirs(ws.getRoot().getFolder(webinfsrc));

				addToClasspath(jproj, JavaCore.newSourceEntry(webinfsrc));
			}

			// Setup the flexible project structure.

			final IVirtualComponent c = ComponentCore.createComponent(project);

			c.create(0, null);

			// final ComponentType ctype = ComponentcoreFactory.eINSTANCE.createComponentType();
			//
			// ctype.setComponentTypeId(IModuleConstants.JST_WEB_MODULE);
			// ctype.setVersion(fv.getVersionString());

			c.setMetaProperty("context-root", model.getStringProperty(IWebFacetInstallDataModelProperties.CONTEXT_ROOT));
			c.setMetaProperty("java-output-path", "/build/classes/");

			// final StructureEdit edit = StructureEdit.getStructureEditForWrite(project);
			//
			// try {
			// StructureEdit.setComponentType(c, ctype);
			// edit.saveIfNecessary(null);
			// } finally {
			// edit.dispose();
			// }

			final IVirtualFolder jsrc = c.getRootFolder().getFolder("/WEB-INF/classes");
			final IClasspathEntry[] cp = jproj.getRawClasspath();

			for (int i = 0; i < cp.length; i++) {
				final IClasspathEntry cpe = cp[i];

				if (cpe.getEntryKind() == IClasspathEntry.CPE_SOURCE) {
					jsrc.createLink(cpe.getPath().removeFirstSegments(1), 0, null);
				}
			}

			final IVirtualFolder webroot = c.getRootFolder();

			webroot.createLink(new Path("/" + model.getStringProperty(IWebFacetInstallDataModelProperties.CONTENT_DIR)), 0, null);

			// Create the deployment descriptor (web.xml) if one doesn't exist
			if (!webinfFolder.getFile("web.xml").exists()) {
				String ver = model.getStringProperty(IFacetDataModelProperties.FACET_VERSION_STR);
				int nVer = J2EEVersionUtil.convertVersionStringToInt(ver);
				WebArtifactEdit.createDeploymentDescriptor(project, nVer);
			}

			// Setup the classpath.

			ClasspathHelper.removeClasspathEntries(project, fv);

			if (!ClasspathHelper.addClasspathEntries(project, fv)) {
				// TODO: Support the no runtime case.
				// ClasspathHelper.addClasspathEntries( project, fv, <something> );
			}

			// Add the web libraries container.

			final IPath cont = new Path(WEB_LIB_CONTAINER).append(project.getName());

			addToClasspath(jproj, JavaCore.newContainerEntry(cont));

			// Associate with an EAR, if necessary.

			final String earProjectName = model.getStringProperty(IWebFacetInstallDataModelProperties.EAR_PROJECT_NAME);

			if (earProjectName != null && !earProjectName.equals("")) { //$NON-NLS-1$
				String ver = model.getStringProperty(IFacetDataModelProperties.FACET_VERSION_STR);
				String j2eeVersionText = J2EEVersionUtil.convertVersionIntToString(J2EEVersionUtil.convertWebVersionStringToJ2EEVersionID(ver));
				installEARFacet(j2eeVersionText, earProjectName, monitor);
			}

			if (monitor != null) {
				monitor.worked(1);
			}
		}
		finally {
			if (monitor != null) {
				monitor.done();
			}
		}
	}

	private static void addToClasspath(final IJavaProject jproj, final IClasspathEntry entry)

	throws CoreException

	{
		final IClasspathEntry[] current = jproj.getRawClasspath();
		final IClasspathEntry[] updated = new IClasspathEntry[current.length + 1];
		System.arraycopy(current, 0, updated, 0, current.length);
		updated[current.length] = entry;
		jproj.setRawClasspath(updated, null);
	}
	private static void mkdirs(final IFolder folder)

	throws CoreException

	{
		if (!folder.exists()) {
			if (folder.getParent() instanceof IFolder) {
				mkdirs((IFolder) folder.getParent());
			}

			folder.create(true, true, null);
		}
	}
}