/*******************************************************************************
 * Copyright (c) 2007, 2008 Oracle. 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:
 *     Oracle - initial API and implementation
 ******************************************************************************/
package org.eclipse.jpt.core.tests.internal.resource.java;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResourceProxy;
import org.eclipse.core.resources.IResourceProxyVisitor;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.ElementChangedEvent;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IElementChangedListener;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jpt.core.JpaProject;
import org.eclipse.jpt.core.JptCorePlugin;
import org.eclipse.jpt.core.ResourceModelListener;
import org.eclipse.jpt.core.context.JpaRootContextNode;
import org.eclipse.jpt.core.internal.GenericJpaProject;
import org.eclipse.jpt.core.internal.SimpleJpaProjectConfig;
import org.eclipse.jpt.core.internal.resource.java.JpaCompilationUnitImpl;
import org.eclipse.jpt.core.internal.utility.jdt.NullAnnotationEditFormatter;
import org.eclipse.jpt.core.resource.java.JavaResourcePersistentType;
import org.eclipse.jpt.core.resource.java.JpaCompilationUnit;
import org.eclipse.jpt.core.tests.internal.utility.jdt.AnnotationTestCase;
import org.eclipse.jpt.utility.CommandExecutorProvider;
import org.eclipse.jpt.utility.internal.ClassTools;
import org.eclipse.jpt.utility.internal.CollectionTools;
import org.eclipse.jpt.utility.internal.StringTools;

@SuppressWarnings("nls")
public class JavaResourceModelTestCase extends AnnotationTestCase
{
	private JavaElementChangeListener javaElementChangeListener;
	protected JpaCompilationUnit jpaCompilationUnit;
	

	public JavaResourceModelTestCase(String name) {
		super(name);
	}
	@Override
	protected void setUp() throws Exception {
		super.setUp();
		this.javaElementChangeListener = new JavaElementChangeListener();
		JavaCore.addElementChangedListener(this.javaElementChangeListener);
	}
	
	@Override
	protected void tearDown() throws Exception {
		super.tearDown();
		JavaCore.removeElementChangedListener(this.javaElementChangeListener);
		this.javaElementChangeListener = null;
	}
	
	/**
	 * Forward the Java element change event back to the JPA model manager.
	 */
	private class JavaElementChangeListener implements IElementChangedListener {
		JavaElementChangeListener() {
			super();
		}
		public void elementChanged(ElementChangedEvent event) {
			JavaResourceModelTestCase.this.javaElementChanged(event);
		}
		@Override
		public String toString() {
			return StringTools.buildToStringFor(this);
		}
	}

	void javaElementChanged(ElementChangedEvent event) {
		if (this.jpaCompilationUnit != null) {
			this.jpaCompilationUnit.javaElementChanged(event);
		}
	}

	protected ICompilationUnit createAnnotationAndMembers(String annotationName, String annotationBody) throws Exception {
		return createAnnotationAndMembers("javax.persistence", annotationName, annotationBody);
	}
	
	protected ICompilationUnit createAnnotationAndMembers(String packageName, String annotationName, String annotationBody) throws Exception {
		return this.javaProject.createCompilationUnit(packageName, annotationName + ".java", "public @interface " + annotationName + " { " + annotationBody + " }");
	}
	
	protected ICompilationUnit createEnumAndMembers(String enumName, String enumBody) throws Exception {
		return createEnumAndMembers("javax.persistence", enumName, enumBody);
	}
	
	protected ICompilationUnit createEnumAndMembers(String packageName, String enumName, String enumBody) throws Exception {
		return this.javaProject.createCompilationUnit(packageName, enumName + ".java", "public enum " + enumName + " { " + enumBody + " }");
	}

	//build up a dummy JpaProject that does not have JpaFiles in it and does not update from java changes
	protected JpaProject buildJpaProject() throws CoreException {
		return new TestJpaProject(this.buildJpaProjectConfig(this.javaProject.getProject()));
	}

	protected class TestJpaProject extends GenericJpaProject {
		protected TestJpaProject(JpaProject.Config config) throws CoreException {
			super(config);
			this.setUpdater(Updater.Null.instance());// ignore all updates, since there is no context model
			this.addJar(org.eclipse.jpt.core.tests.internal.projects.TestJpaProject.jpaJarName());
		}

		protected void addJar(String jarPath) throws JavaModelException {
			this.addClasspathEntry(JavaCore.newLibraryEntry(new Path(jarPath), null, null));
		}

		private void addClasspathEntry(IClasspathEntry entry) throws JavaModelException {
			getJavaProject().setRawClasspath(CollectionTools.add(getJavaProject().getRawClasspath(), entry), null);
		}
		
		@Override
		protected IResourceProxyVisitor buildInitialResourceProxyVisitor() {
			return new IResourceProxyVisitor() {
				public boolean visit(IResourceProxy proxy) throws CoreException {
					return false;  // ignore all the files in the Eclipse project
				}
			};
		}
		
		@Override
		protected JpaRootContextNode buildRootContextNode() {
			return null;  // no root context
		}
	}

	protected JpaProject.Config buildJpaProjectConfig(IProject project) {
		SimpleJpaProjectConfig config = new SimpleJpaProjectConfig();
		config.setProject(project);
		config.setJpaPlatform(JptCorePlugin.getJpaPlatform(project));
		config.setConnectionProfileName(JptCorePlugin.getConnectionProfileName(project));
		config.setDiscoverAnnotatedClasses(JptCorePlugin.discoverAnnotatedClasses(project));
		return config;
	}

	protected JavaResourcePersistentType buildJavaTypeResource(ICompilationUnit cu) throws CoreException {
		this.jpaCompilationUnit = this.buildJpaCompilationUnit(cu);
		this.jpaCompilationUnit.resolveTypes();
		return this.hackJavaResourcePersistentType();
	}

	protected JavaResourcePersistentType hackJavaResourcePersistentType() {
		return (JavaResourcePersistentType) ClassTools.fieldValue(this.jpaCompilationUnit, "persistentType");
	}

	protected JpaCompilationUnit buildJpaCompilationUnit(ICompilationUnit cu) throws CoreException {
		if (this.jpaCompilationUnit != null) {
			throw new IllegalStateException();
		}
		JpaProject jpaProject = buildJpaProject();
		return new JpaCompilationUnitImpl(
			cu,
			jpaProject.getJpaPlatform().getAnnotationProvider(),
			CommandExecutorProvider.Default.instance(),
			NullAnnotationEditFormatter.instance(),
			this.buildResourceModelListener()
		);
	}

	ResourceModelListener buildResourceModelListener() {
		return new ResourceModelListener() {
			public void resourceModelChanged() {
				// ignore
			}
		};
	}

}