/******************************************************************************
 * Copyright (c) 2009 Red Hat 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:
 *    Rob Stryker - initial implementation and ongoing maintenance
 *    Chuck Bridgham - additional support
 *    Konstantin Komissarchik - misc. UI cleanup
 ******************************************************************************/
package org.eclipse.jst.j2ee.internal.ui;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.IClasspathAttribute;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jst.common.jdt.internal.javalite.IJavaProjectLite;
import org.eclipse.jst.common.jdt.internal.javalite.JavaCoreLite;
import org.eclipse.jst.j2ee.classpathdep.ClasspathDependencyUtil;
import org.eclipse.jst.j2ee.classpathdep.IClasspathDependencyConstants.DependencyAttributeType;
import org.eclipse.jst.j2ee.internal.common.classpath.J2EEComponentClasspathUpdater;
import org.eclipse.jst.j2ee.internal.componentcore.JavaEEModuleHandler;
import org.eclipse.jst.j2ee.internal.plugin.J2EEUIPlugin;
import org.eclipse.jst.j2ee.internal.project.J2EEProjectUtilities;
import org.eclipse.jst.j2ee.project.JavaEEProjectUtilities;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.wst.common.componentcore.internal.IModuleHandler;
import org.eclipse.wst.common.componentcore.internal.impl.TaskModel;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualReference;
import org.eclipse.wst.common.componentcore.ui.internal.propertypage.ComponentDependencyContentProvider;
import org.eclipse.wst.common.componentcore.ui.internal.taskwizard.TaskWizard;
import org.eclipse.wst.common.componentcore.ui.propertypage.AddModuleDependenciesPropertiesPage;
import org.eclipse.wst.common.componentcore.ui.propertypage.IReferenceWizardConstants;
import org.eclipse.wst.common.componentcore.ui.propertypage.IReferenceWizardConstants.ProjectConverterOperationProvider;
import org.eclipse.wst.common.componentcore.ui.propertypage.ModuleAssemblyRootPage;
import org.eclipse.wst.common.frameworks.datamodel.IDataModelOperation;

public class J2EEModuleDependenciesPropertyPage extends
		AddModuleDependenciesPropertiesPage {

	public J2EEModuleDependenciesPropertyPage(IProject project,
			ModuleAssemblyRootPage page) {
		super(project, page);
	}
	
	public class ClasspathEntryProxy {
		public IClasspathEntry entry;
		public ClasspathEntryProxy(IClasspathEntry entry){
			this.entry = entry;
		}
	}
	
	protected List <IClasspathEntry> originalClasspathEntries = new ArrayList<IClasspathEntry>(); 
	protected List <ClasspathEntryProxy> currentClasspathEntries = new ArrayList<ClasspathEntryProxy>(); 
	
	@Override
	protected void initialize() {
		super.initialize();
		resetClasspathEntries();
	}

	private void resetClasspathEntries() {
		originalClasspathEntries.clear();
		currentClasspathEntries.clear();
		originalClasspathEntries.addAll(readRawEntries());
		for(IClasspathEntry entry:originalClasspathEntries){
			currentClasspathEntries.add(new ClasspathEntryProxy(entry));
		}
	}

	@Override
	public void performDefaults() {
		resetClasspathEntries();
		super.performDefaults();
	}
	
	protected List <IClasspathEntry> readRawEntries(){
		return readRawEntries(rootComponent);
	}
		
	public static List <IClasspathEntry> readRawEntries(IVirtualComponent component){
		List <IClasspathEntry> entries = new ArrayList<IClasspathEntry>();
		if (!component.getProject().isAccessible()){
			return entries;
		}
		IJavaProjectLite javaProjectLite = JavaCoreLite.create(component.getProject());
		try {
			Map<IClasspathEntry, IClasspathAttribute> rawComponentClasspathDependencies = ClasspathDependencyUtil.getRawComponentClasspathDependencies(javaProjectLite, DependencyAttributeType.CLASSPATH_COMPONENT_DEPENDENCY);
			entries.addAll(rawComponentClasspathDependencies.keySet());
		} catch (CoreException e) {
        	J2EEUIPlugin.logError(e);
		}
		return entries;
	}
	
	@Override
	public boolean postHandleChanges(IProgressMonitor monitor) {
		return true;
	}
	
	@Override
	protected void handleRemoved(ArrayList<IVirtualReference> removed) {
		super.handleRemoved(removed);
		J2EEComponentClasspathUpdater.getInstance().queueUpdateEAR(rootComponent.getProject());
	}
	
	@Override
	protected void remove(Object selectedItem) {
		if(selectedItem instanceof ClasspathEntryProxy){
			ClasspathEntryProxy entry = (ClasspathEntryProxy)selectedItem;
			currentClasspathEntries.remove(entry);
		} else {
			super.remove(selectedItem);
		}
	}
	
	@Override
	protected String getModuleAssemblyRootPageDescription() {
		if (JavaEEProjectUtilities.isEJBProject(project))
			return Messages.J2EEModuleDependenciesPropertyPage_3;
		if (JavaEEProjectUtilities.isApplicationClientProject(project))
			return Messages.J2EEModuleDependenciesPropertyPage_4;
		if (JavaEEProjectUtilities.isJCAProject(project))
			return Messages.J2EEModuleDependenciesPropertyPage_5;
		return super.getModuleAssemblyRootPageDescription();
	}

	@Override
	protected IModuleHandler getModuleHandler() {
		if(moduleHandler == null)
			moduleHandler = new JavaEEModuleHandler();
		return moduleHandler;
	}
	
	@Override
	protected void setCustomReferenceWizardProperties(TaskModel model) {
		model.putObject(IReferenceWizardConstants.PROJECT_CONVERTER_OPERATION_PROVIDER, getConverterProvider());
	}
	
	public ProjectConverterOperationProvider getConverterProvider() {
		return new ProjectConverterOperationProvider() {
			public IDataModelOperation getConversionOperation(IProject project) {
				return J2EEProjectUtilities.createFlexJavaProjectForProjectOperation(project);
			}
		};
	}
	
	@Override
	protected ComponentDependencyContentProvider createProvider() {
		JavaEEComponentDependencyContentProvider provider = new JavaEEComponentDependencyContentProvider(this);
		provider.setClasspathEntries(currentClasspathEntries);
		return provider;
	}
	
	@Override
	protected boolean canRemove(Object selectedObject) {
		return super.canRemove(selectedObject) && !(selectedObject instanceof JavaEEComponentDependencyContentProvider.ConsumedClasspathEntryProxy);
	}
	
	@Override
	protected RuntimePathCellModifier getRuntimePathCellModifier() {
		return new AddModuleDependenciesPropertiesPage.RuntimePathCellModifier(){
			@Override
			public boolean canModify(Object element, String property) {
				if( property.equals(DEPLOY_PATH_PROPERTY) && element instanceof ClasspathEntryProxy) {
					return true; 
				}
				return super.canModify(element, property);
			}

			@Override
			public Object getValue(Object element, String property) {
				if(element instanceof ClasspathEntryProxy){
					IClasspathEntry entry = ((ClasspathEntryProxy)element).entry;
					IPath runtimePath = ClasspathDependencyUtil.getRuntimePath(entry);
					if(runtimePath.isRoot())
						return runtimePath.toString();
					return runtimePath.makeRelative().toString();
				}
				return super.getValue(element, property);
			}

			@Override
			public void modify(Object element, String property, Object value) {
				if (property.equals(DEPLOY_PATH_PROPERTY)) {
					TreeItem item = (TreeItem) element;
					if(item.getData() instanceof ClasspathEntryProxy){
						TreeItem[] components = availableComponentsViewer.getTree().getItems();
						int tableIndex = -1;
						for(int i=0; i < components.length; i++) {
							if(components[i] == item) {
								tableIndex = i;
								break;
							}
						}
						ClasspathEntryProxy proxy = (ClasspathEntryProxy)item.getData();
						IPath runtimePath = new Path(((String)value).trim()).makeRelative();
						if(runtimePath.isEmpty())
							runtimePath = runtimePath.makeAbsolute();
						if(tableIndex >= 0)
							components[tableIndex].setText(AddModuleDependenciesPropertiesPage.DEPLOY_COLUMN, runtimePath.toString());
						if(!ClasspathDependencyUtil.isMappedIntoContainer(runtimePath.toString()))
							runtimePath = runtimePath.makeAbsolute();
						IClasspathEntry newEntry = ClasspathDependencyUtil.modifyDependencyPath(proxy.entry, runtimePath);
						proxy.entry = newEntry;
						resourceMappingsChanged = true;
					}
				}
				super.modify(element, property, value);
			}
		};
	}
	
	protected boolean shouldSaveClasspathEntires() {
		return true;
	}
	
	@Override
	protected boolean saveReferenceChanges() {
		boolean subResult = super.saveReferenceChanges();
		if(!subResult){
			return subResult;
		}
		
		if( !shouldSaveClasspathEntires())
			return true;
		
		Map <IPath, IClasspathEntry> modified = new HashMap <IPath, IClasspathEntry>();
		
		Map <IPath, IClasspathEntry> originalMap = new HashMap <IPath, IClasspathEntry>();
		for(IClasspathEntry originalEntry : originalClasspathEntries){
			originalMap.put(originalEntry.getPath(), originalEntry);
		}

		for(ClasspathEntryProxy proxy: currentClasspathEntries){
			IClasspathEntry currentEntry = proxy.entry;
			IPath path = currentEntry.getPath();
			IClasspathEntry originalEntry = originalMap.remove(path);
			if(currentEntry.equals(originalEntry)){
				//no change
				continue;
			}
			modified.put(path, currentEntry);
		}
		
		Map <IPath, IClasspathEntry> removed = originalMap;
		
		IJavaProject javaProject = JavaCore.create(rootComponent.getProject());
		try {
			final IClasspathEntry [] rawClasspath = javaProject.getRawClasspath();
			List <IClasspathEntry> newClasspath = new ArrayList <IClasspathEntry>();
			for(IClasspathEntry entry:rawClasspath){
				IPath path = entry.getPath();
				if(removed.containsKey(path)){
					//user removed entry
					IClasspathEntry newEntry = ClasspathDependencyUtil.modifyDependencyPath(entry, null);
					newClasspath.add(newEntry);
				} else if(modified.containsKey(path)){
					//user changed path value
					IClasspathEntry newEntry = modified.get(path);
					IPath runtimePath = ClasspathDependencyUtil.getRuntimePath(newEntry);
					if(runtimePath.toString().length() == 0){
						//prevent the user from specifying no path
						newEntry = ClasspathDependencyUtil.modifyDependencyPath(newEntry, new Path("/")); //$NON-NLS-1$
					}
					newClasspath.add(newEntry);
				} else {
					//no change
					newClasspath.add(entry);
				}
			}
			javaProject.setRawClasspath( newClasspath.toArray( new IClasspathEntry[ newClasspath.size() ] ), null );
			
			originalClasspathEntries.clear();
			currentClasspathEntries.clear();
			resetClasspathEntries();
		} catch (JavaModelException e) {
        	J2EEUIPlugin.logError(e);
			return false;
		}
		return true;
	}

	@Override
	protected void handleAddDirective( final TaskWizard wizard ) 
	{
		final List<IClasspathEntry> classpathEntries 
			= (List<IClasspathEntry>) wizard.getTaskModel().getObject( AddJavaBuildPathEntriesWizardFragment.PROP_SELECTION );
		
		if( classpathEntries != null && ! classpathEntries.isEmpty() )
		{
			for( IClasspathEntry cpe : classpathEntries )
			{
				this.currentClasspathEntries.add( new ClasspathEntryProxy( cpe ) );
			}
		}
		else
		{
			super.handleAddDirective(wizard);
		}
	}
	
	@Override
	protected void verify() {
		propPage.refreshProblemsView();
	}

	@Override
	public IStatus validate() {
		ArrayList<ComponentResourceProxy> allMappings = new ArrayList<ComponentResourceProxy>();
		allMappings.addAll(resourceMappings);
		allMappings.addAll(hiddenMappings);
		
		return J2EEModuleDeploymentAssemblyVerifierHelper.verify(rootComponent, runtime, currentReferences, allMappings,resourceMappingsChanged, currentClasspathEntries);
	}

//	
//	@Override
//	protected IDataModelProvider getAddReferenceDataModelProvider(IVirtualComponent component) {
//		return new AddComponentToEnterpriseApplicationDataModelProvider();
//	}
//	
//	protected void addToManifest(ArrayList<IVirtualComponent> components) {
//		StringBuffer newComps = getCompsForManifest(components);
//		if(newComps.toString().length() > 0) {
//			UpdateManifestOperation op = createManifestOperation(newComps.toString());
//			try {
//				op.run(new NullProgressMonitor());
//			} catch (InvocationTargetException e) {
//				J2EEUIPlugin.logError(e);
//			} catch (InterruptedException e) {
//				J2EEUIPlugin.logError(e);
//			}	
//		}
//	}
//
//	protected void addOneComponent(IVirtualComponent component, IPath path, String archiveName) throws CoreException {
//		//Find the Ear's that contain this component
//		IProject[] earProjects = EarUtilities.getReferencingEARProjects(rootComponent.getProject());
//		for (int i = 0; i < earProjects.length; i++) {
//			IProject project = earProjects[i];
//			
//			IDataModelProvider provider = getAddReferenceDataModelProvider(component);
//			IDataModel dm = DataModelFactory.createDataModel(provider);
//			
//			dm.setProperty(ICreateReferenceComponentsDataModelProperties.SOURCE_COMPONENT, ComponentCore.createComponent(project));
//			dm.setProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENT_LIST, Arrays.asList(component));
//			
//			//[Bug 238264] the uri map needs to be manually set correctly
//			Map<IVirtualComponent, String> uriMap = new HashMap<IVirtualComponent, String>();
//			uriMap.put(component, archiveName);
//			dm.setProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENTS_TO_URI_MAP, uriMap);
//	        dm.setProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENTS_DEPLOY_PATH, path);
//	
//			IStatus stat = dm.validateProperty(ICreateReferenceComponentsDataModelProperties.TARGET_COMPONENT_LIST);
//			if (stat != OK_STATUS)
//				throw new CoreException(stat);
//			try {
//				dm.getDefaultOperation().execute(new NullProgressMonitor(), null);
//			} catch (ExecutionException e) {
//				ModuleCoreUIPlugin.logError(e);
//			}	
//		}
//	}
//	
//
//	protected StringBuffer getCompsForManifest(ArrayList<IVirtualComponent> components) {
//		StringBuffer newComps = new StringBuffer();
//		for (Iterator iterator = components.iterator(); iterator.hasNext();) {
//			IVirtualComponent comp = (IVirtualComponent) iterator.next();
//			String archiveName = new Path(derivedRefsObjectToRuntimePath.get(comp)).lastSegment();
//			newComps.append(archiveName);
//			newComps.append(' ');
//		}
//		return newComps;
//	}
//	
//	protected UpdateManifestOperation createManifestOperation(String newComps) {
//		return new UpdateManifestOperation(project.getName(), newComps, false);
//	}
//
//	private void removeFromManifest(ArrayList<IVirtualComponent> removed) {
//		String sourceProjName = project.getName();
//		IProgressMonitor monitor = new NullProgressMonitor();
//		IFile manifestmf = J2EEProjectUtilities.getManifestFile(project);
//		ArchiveManifest mf = J2EEProjectUtilities.readManifest(project);
//		if (mf == null)
//			return;
//		IDataModel updateManifestDataModel = DataModelFactory.createDataModel(new UpdateManifestDataModelProvider());
//		updateManifestDataModel.setProperty(UpdateManifestDataModelProperties.PROJECT_NAME, sourceProjName);
//		updateManifestDataModel.setBooleanProperty(UpdateManifestDataModelProperties.MERGE, false);
//		updateManifestDataModel.setProperty(UpdateManifestDataModelProperties.MANIFEST_FILE, manifestmf);
//		String[] cp = mf.getClassPathTokenized();
//		List cpList = new ArrayList();
//		
//		for (int i = 0; i < cp.length; i++) {
//			boolean foundMatch = false;
//			for (Iterator iterator = removed.iterator(); iterator.hasNext();) {
//				IVirtualComponent comp = (IVirtualComponent) iterator.next();
//				String cpToRemove = new Path(derivedRefsOldComponentToRuntimePath.get(comp)).lastSegment();
//				if (cp[i].equals(cpToRemove))
//					foundMatch = true;
//			}
//			if (!foundMatch)
//				cpList.add(cp[i]);
//		}
//		updateManifestDataModel.setProperty(UpdateManifestDataModelProperties.JAR_LIST, cpList);
//		try {
//			updateManifestDataModel.getDefaultOperation().execute(monitor, null );
//		} catch (ExecutionException e) {
//			J2EEUIPlugin.logError(e);
//		}
//	}

}