/*******************************************************************************
 * Copyright (c) 2003, 2004 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 API and implementation
 *******************************************************************************/
package org.eclipse.wst.common.componentcore.internal.util;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.ResourceAttributes;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.emf.ecore.resource.Resource;
import org.eclipse.jem.util.emf.workbench.ProjectUtilities;
import org.eclipse.wst.common.componentcore.ArtifactEdit;
import org.eclipse.wst.common.componentcore.ComponentCore;
import org.eclipse.wst.common.componentcore.ModuleCoreNature;
import org.eclipse.wst.common.componentcore.datamodel.properties.ICreateReferenceComponentsDataModelProperties;
import org.eclipse.wst.common.componentcore.internal.operation.CreateReferenceComponentsDataModelProvider;
import org.eclipse.wst.common.componentcore.internal.operation.CreateReferenceComponentsOp;
import org.eclipse.wst.common.componentcore.internal.operation.RemoveReferenceComponentOperation;
import org.eclipse.wst.common.componentcore.internal.operation.RemoveReferenceComponentsDataModelProvider;
import org.eclipse.wst.common.componentcore.internal.resources.VirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualFolder;
import org.eclipse.wst.common.componentcore.resources.IVirtualResource;
import org.eclipse.wst.common.frameworks.datamodel.DataModelFactory;
import org.eclipse.wst.common.frameworks.datamodel.IDataModel;
import org.eclipse.wst.common.internal.emfworkbench.WorkbenchResourceHelper;

public class ComponentUtilities {

	/**
	 * Ensure the container is not read-only.
	 * <p>
	 * For Linux, a Resource cannot be created in a ReadOnly folder. This is only necessary for new
	 * files.
	 * 
	 * @param resource
	 *            workspace resource to make read/write
	 * @plannedfor 1.0.0
	 */
	public static void ensureContainerNotReadOnly(IResource resource) {
		if (resource != null && !resource.exists()) { // it must be new
			IContainer container = resource.getParent();
			if (container != null) {
				ResourceAttributes attr = container.getResourceAttributes();
				if (!attr.isReadOnly())
					container = container.getParent();
				attr.setReadOnly(false);
			}
		}
	}

	public static IFolder createFolderInComponent(IVirtualComponent component, String folderName) throws CoreException {
		if (folderName != null) {
			IVirtualFolder rootfolder = component.getRootFolder();
			IFolder folder = ResourcesPlugin.getWorkspace().getRoot().getFolder(new Path(rootfolder.getProject().getName()).append(folderName));
			if (!folder.exists()) {
				ProjectUtilities.ensureContainerNotReadOnly(folder);
				folder.create(true, true, null);
			}
			return folder;
		}
		return null;
	}


	public static ArtifactEdit getArtifactEditForRead(IVirtualComponent comp) {
		ArtifactEditRegistryReader reader = ArtifactEditRegistryReader.instance();
		if (comp != null) {
			IArtifactEditFactory factory = reader.getArtifactEdit(comp.getProject());
			return factory.createArtifactEditForRead(comp);
		}
		return null;
	}


	public static IFile findFile(IVirtualComponent comp, IPath aPath) throws CoreException {
		if (comp == null || aPath == null)
			return null;
		IVirtualFolder root = comp.getRootFolder();
		IVirtualResource file = root.findMember(aPath);
		if (file != null)
			return (IFile) file.getUnderlyingResource();
		return null;
	}

	public static IVirtualComponent findComponent(IResource res) {

		return (IVirtualComponent)res.getAdapter(IVirtualComponent.class);
	}
	
	/**
	 * **********************Please read java doc before using this api*******************
	 * This is a very expensive api from a performance point as it does a structure edit
	 * access and release for each component in the workspace. Use this api very sparingly
	 * and if used cached the information returned by this api for further processing
	 * @return - A an array of all virtual components in the workspace
	 * ***********************************************************************************
	 */

	public static IVirtualComponent[] getAllWorkbenchComponents() {
		List components = new ArrayList();
		List projects = Arrays.asList(ResourcesPlugin.getWorkspace().getRoot().getProjects());
		for (int i = 0; i < projects.size(); i++) {
			if( ModuleCoreNature.isFlexibleProject((IProject)projects.get(i))){
				IVirtualComponent wbComp = ComponentCore.createComponent((IProject)projects.get(i));
				components.add(wbComp);
			}
		}
		VirtualComponent[] temp = (VirtualComponent[]) components.toArray(new VirtualComponent[components.size()]);
		return temp;
	}
	
	/**
	 * **********************Please read java doc before using this api*******************
	 * This is a very expensive api from a performance point as it does a structure edit
	 * access and release for each component in the workspace. Use this api very sparingly
	 * and if used cached the information returned by this api for further processing.
	 * 
	 * @return - A virtual component in the workspace
	 * ***********************************************************************************
	 */
	public static IVirtualComponent getComponent(String componentName) {
		IVirtualComponent[] allComponents = getAllWorkbenchComponents();
		for (int i = 0; i < allComponents.length; i++) {
			if (allComponents[i].getName().equals(componentName))
				return allComponents[i];
		}
		return null;
	}


	public static ArtifactEdit getArtifactEditForWrite(IVirtualComponent comp) {
		ArtifactEditRegistryReader reader = ArtifactEditRegistryReader.instance();
		IArtifactEditFactory factory = reader.getArtifactEdit(comp.getProject());
		return factory.createArtifactEditForWrite(comp);
	}

	public static IVirtualComponent findComponent(EObject anObject) {
		Resource res = anObject.eResource();
		return findComponent(res);
	}

	public static IVirtualComponent findComponent(Resource aResource) {
		return (IVirtualComponent)WorkbenchResourceHelper.getFile(aResource).getAdapter(IVirtualComponent.class);
	}

//	public static JavaProjectMigrationOperation createFlexJavaProjectForProjectOperation(IProject project) {
//		IDataModel model = DataModelFactory.createDataModel(new JavaProjectMigrationDataModelProvider());
//		model.setProperty(IJavaProjectMigrationDataModelProperties.PROJECT_NAME, project.getName());
//		return new JavaProjectMigrationOperation(model);
//	}

	public static CreateReferenceComponentsOp createReferenceComponentOperation(IVirtualComponent sourceComponent, List targetComponentProjects) {
		IDataModel model = DataModelFactory.createDataModel(new CreateReferenceComponentsDataModelProvider());
		model.setProperty(ICreateReferenceComponentsDataModelProperties.SOURCE_COMPONENT, sourceComponent);
		List modHandlesList = (List) model.getProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENT_LIST);
		modHandlesList.addAll(targetComponentProjects);
		model.setProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENT_LIST, modHandlesList);
		
		return new CreateReferenceComponentsOp(model);
	}
	
	public static CreateReferenceComponentsOp createWLPReferenceComponentOperation(IVirtualComponent sourceComponent, List targetComponentProjects) {
		IDataModel model = DataModelFactory.createDataModel(new CreateReferenceComponentsDataModelProvider());
		model.setProperty(ICreateReferenceComponentsDataModelProperties.SOURCE_COMPONENT, sourceComponent);
		List modHandlesList = (List) model.getProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENT_LIST);
		modHandlesList.addAll(targetComponentProjects);
		model.setProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENT_LIST, modHandlesList);
		model.setProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENTS_DEPLOY_PATH,"/WEB-INF/lib"); //$NON-NLS-1$
		return new CreateReferenceComponentsOp(model);
	}

	public static RemoveReferenceComponentOperation removeReferenceComponentOperation(IVirtualComponent sourceComponent, List targetComponentProjects) {
		IDataModel model = DataModelFactory.createDataModel(new RemoveReferenceComponentsDataModelProvider());
		model.setProperty(ICreateReferenceComponentsDataModelProperties.SOURCE_COMPONENT, sourceComponent);
		List modHandlesList = (List) model.getProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENT_LIST);
		modHandlesList.addAll(targetComponentProjects);
		model.setProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENT_LIST, modHandlesList);
		return new RemoveReferenceComponentOperation(model);

	}
	
	public static IVirtualComponent[] getComponents(IProject[] projects) {
		List result = new ArrayList();
		if (projects!=null) {
			for (int i=0; i<projects.length; i++) {
				if (projects[i] != null) {
					IVirtualComponent comp = ComponentCore.createComponent(projects[i]);
					if (comp != null && comp.exists())
						result.add(comp);
				}
			}
		}
		return (IVirtualComponent[]) result.toArray(new IVirtualComponent[result.size()]);
	}

}