/*
 * Copyright (c) 2005, 2006 IBM Corporation 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:
 * IBM Corporation - initial implementation
 *
 */
package org.eclipse.epf.diagramming.part;

import java.io.IOException;
import java.io.File;
import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.operations.OperationHistoryFactory;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IWorkspaceRoot;
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.NullProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.emf.ecore.resource.ResourceSet;
import org.eclipse.gmf.runtime.common.core.command.CommandResult;
import org.eclipse.gmf.runtime.diagram.core.services.ViewService;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.epf.diagramming.base.commands.CreateDiagramCommand;
import org.eclipse.epf.persistence.MultiFileSaveUtil;
import org.eclipse.epf.uma.CapabilityPattern;
import org.eclipse.epf.uma.DeliveryProcess;
import org.eclipse.epf.uma.MethodPlugin;
import org.eclipse.epf.uma.Process;
import org.eclipse.epf.uma.util.UmaUtil;
import org.eclipse.gmf.runtime.diagram.ui.resources.editor.ide.util.IDEEditorUtil;
import org.eclipse.gmf.runtime.diagram.ui.resources.editor.util.DiagramFileCreator;
import org.eclipse.gmf.runtime.emf.commands.core.command.AbstractTransactionalCommand;
import org.eclipse.gmf.runtime.diagram.ui.resources.editor.util.EditorUtil;
import org.eclipse.gmf.runtime.emf.core.GMFEditingDomainFactory;
import org.eclipse.gmf.runtime.notation.Diagram;
import org.eclipse.jface.operation.IRunnableContext;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.IEditorInput;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.uml2.uml.Activity;
import org.eclipse.uml2.uml.UMLFactory;

/**
 * @generated
 */
public class UMLDiagramEditorUtil extends IDEEditorUtil {

	/**
	 * @generated
	 */
	public static final IFile createAndOpenDiagram(
			DiagramFileCreator diagramFileCreator, IPath containerPath,
			String fileName, InputStream initialContents, String kind,
			IWorkbenchWindow window, IProgressMonitor progressMonitor,
			boolean openEditor, boolean saveDiagram) {
		IFile diagramFile = UMLDiagramEditorUtil.createNewDiagramFile(
				diagramFileCreator, containerPath, fileName, initialContents,
				kind, window.getShell(), progressMonitor);
		if (diagramFile != null && openEditor) {
			IDEEditorUtil.openDiagram(diagramFile, window, saveDiagram,
					progressMonitor);
		}
		return diagramFile;
	}

	/**
	 * <p>
	 * This method should be called within a workspace modify operation since it creates resources.
	 * </p>
	 * @generated
	 * @return the created file resource, or <code>null</code> if the file was not created
	 */
	public static final IFile createNewDiagramFile(
			DiagramFileCreator diagramFileCreator, IPath containerFullPath,
			String fileName, InputStream initialContents, String kind,
			Shell shell, IProgressMonitor progressMonitor) {
		TransactionalEditingDomain editingDomain = GMFEditingDomainFactory.INSTANCE
				.createEditingDomain();
		ResourceSet resourceSet = editingDomain.getResourceSet();
		progressMonitor.beginTask("Creating diagram and model files", 4); //$NON-NLS-1$
		final IProgressMonitor subProgressMonitor = new SubProgressMonitor(
				progressMonitor, 1);
		final IFile diagramFile = diagramFileCreator.createNewFile(
				containerFullPath, fileName, initialContents, shell,
				new IRunnableContext() {
					public void run(boolean fork, boolean cancelable,
							IRunnableWithProgress runnable)
							throws InvocationTargetException,
							InterruptedException {
						runnable.run(subProgressMonitor);
					}
				});
		final Resource diagramResource = resourceSet
				.createResource(URI.createPlatformResourceURI(diagramFile
						.getFullPath().toString()));
		List affectedFiles = new ArrayList();
		affectedFiles.add(diagramFile);

		final String kindParam = kind;
		AbstractTransactionalCommand command = new AbstractTransactionalCommand(
				editingDomain, "Creating diagram and model", affectedFiles) { //$NON-NLS-1$
			protected CommandResult doExecuteWithResult(
					IProgressMonitor monitor, IAdaptable info)
					throws ExecutionException {
				Activity model = createInitialModel();
				diagramResource.getContents().add(model);
				Diagram diagram = ViewService.createDiagram(model, kindParam,
						EPFDiagramEditorPlugin.DIAGRAM_PREFERENCES_HINT);
				if (diagram != null) {
					diagramResource.getContents().add(diagram);
					diagram.setName(diagramFile.getName());
					diagram.setElement(model);
				}
				try {
					diagramResource.save(Collections.EMPTY_MAP);
				} catch (IOException e) {

					EPFDiagramEditorPlugin.getInstance().logError(
							"Unable to store model and diagram resources", e); //$NON-NLS-1$
				}
				return CommandResult.newOKCommandResult();
			}
		};

		try {
			OperationHistoryFactory.getOperationHistory().execute(command,
					new SubProgressMonitor(progressMonitor, 1), null);
		} catch (ExecutionException e) {
			EPFDiagramEditorPlugin.getInstance().logError(
					"Unable to create model and diagram", e); //$NON-NLS-1$
		}

		try {
			diagramFile.setCharset(
					"UTF-8", new SubProgressMonitor(progressMonitor, 1)); //$NON-NLS-1$
		} catch (CoreException e) {
			EPFDiagramEditorPlugin.getInstance().logError(
					"Unable to set charset for diagram file", e); //$NON-NLS-1$
		}

		return diagramFile;
	}

	/**
	 * @modified
	 */
	public static final IFile createAndOpenDiagram(
			DiagramFileCreator diagramFileCreator, IPath containerPath,
			String fileName, InputStream initialContents, String kind,
			IWorkbenchWindow window, IProgressMonitor progressMonitor,
			boolean openEditor, boolean saveDiagram, IEditorInput input) {
		IFile diagramFile = UMLDiagramEditorUtil.createNewDiagramFile(
				diagramFileCreator, containerPath, fileName, initialContents,
				kind, window.getShell(), progressMonitor, input);
		if (diagramFile != null && openEditor) {
			IDEEditorUtil.openDiagram(diagramFile, window, saveDiagram,
					progressMonitor);
		}
		return diagramFile;

	}

	/**
	 * <p>
	 * This method should be called within a workspace modify operation since it creates resources.
	 * </p>
	 * @modified
	 * @return the created file resource, or <code>null</code> if the file was not created
	 */
	public static final IFile createNewDiagramFile(
			DiagramFileCreator diagramFileCreator, IPath containerFullPath,
			String fileName, InputStream initialContents, String kind,
			Shell shell, IProgressMonitor progressMonitor, IEditorInput input) {
		TransactionalEditingDomain editingDomain = GMFEditingDomainFactory.INSTANCE
				.createEditingDomain();
		ResourceSet resourceSet = editingDomain.getResourceSet();
		progressMonitor.beginTask("Creating diagram and model files", 4); //$NON-NLS-1$
		final IProgressMonitor subProgressMonitor = new SubProgressMonitor(
				progressMonitor, 1);
		final IFile diagramFile = diagramFileCreator.createNewFile(
				containerFullPath, fileName, initialContents, shell,
				new IRunnableContext() {
					public void run(boolean fork, boolean cancelable,
							IRunnableWithProgress runnable)
							throws InvocationTargetException,
							InterruptedException {
						runnable.run(subProgressMonitor);
					}
				});
		final Resource diagramResource = resourceSet
				.createResource(URI.createPlatformResourceURI(diagramFile
						.getFullPath().toString()));
		List affectedFiles = new ArrayList();
		affectedFiles.add(diagramFile);

		//final String kindParam = kind;
		CreateDiagramCommand command = new CreateDiagramCommand(editingDomain,
				"Creating diagram and model", affectedFiles, input,
				diagramResource, kind);
		try {
			OperationHistoryFactory.getOperationHistory().execute(command,
					new SubProgressMonitor(progressMonitor, 1), null);
		} catch (ExecutionException e) {
			EPFDiagramEditorPlugin.getInstance().logError(
					"Unable to create model and diagram", e); //$NON-NLS-1$
		}

		try {
			diagramFile.setCharset(
					"UTF-8", new SubProgressMonitor(progressMonitor, 1)); //$NON-NLS-1$
		} catch (CoreException e) {
			EPFDiagramEditorPlugin.getInstance().logError(
					"Unable to set charset for diagram file", e); //$NON-NLS-1$
		}

		return diagramFile;
	}

	/**
	 * Create a new instance of domain element associated with canvas.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @generated
	 */
	private static Activity createInitialModel() {
		return UMLFactory.eINSTANCE.createActivity();
	}

	/**
	 * To open a diagram and create a file.
	 * @custom
	 */
	public static void createAndOpenDiagram(IWorkbenchWindow dWindow,
			IEditorInput input, Process proc) {
		UMLDiagramEditorUtil.createAndOpenDiagram(UMLDiagramFileCreator
				.getInstance(), getContainerPath(proc), "default", EditorUtil
				.getInitialContents(), "EPF UML", dWindow,
				new NullProgressMonitor(), true, true, input);
	}

	/**
	 * @custom
	 */
	public static IPath getContainerPath() {
		IPath path = EditorUtil.getDefaultDiagramPath(null, null);
		if (path == null) {
			IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
			IProject[] projects = root.getProjects();

			path = root.getFullPath();

			for (int i = 0; i < projects.length; ++i) {
				IProject project = projects[i];

				if (project.isOpen()) {
					path = project.getFullPath();
					break;
				}
			}
		}
		return path;
	}

	/**
	 * @custom
	 * 
	 * @param proc
	 * @return
	 */
	public static IPath getContainerPath(Process proc) {

		if (proc instanceof Process) {
			MethodPlugin plugin = UmaUtil.getMethodPlugin(proc);

			String relativeDir;

			if (proc instanceof CapabilityPattern) {
				relativeDir = MultiFileSaveUtil.CAPABILITY_PATTERN_PATH;
			} else if (proc instanceof DeliveryProcess) {
				relativeDir = MultiFileSaveUtil.DELIVERY_PROCESS_PATH;
			} else {
				relativeDir = ""; //$NON-NLS-1$
			}

			IPath workspacePath = EditorUtil.getDefaultDiagramPath(null, null);
			if (workspacePath == null) {
				IWorkspaceRoot root = ResourcesPlugin.getWorkspace().getRoot();
				IProject[] projects = root.getProjects();

				workspacePath = root.getFullPath();

				for (int i = 0; i < projects.length; ++i) {
					IProject project = projects[i];

					if (project.isOpen()) {
						workspacePath = project.getFullPath();
						break;
					}
				}
			}

			String libDir = workspacePath.toString();
			String pluginDir = libDir + File.separator + plugin.getName();
			String diagramDir = pluginDir + File.separator + relativeDir
					+ File.separator + proc.getName() + File.separator;

			Path path = new Path(diagramDir);
			return path;

			//			return workspacePath;
		} else
			return null;
	}

	public static void setEditorInputToDiagram(Diagram diagram,
			IEditorInput input) {

	}

}