/*******************************************************************************
 * Copyright (c) 2005, 2007 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.jst.j2ee.application.internal.operations;


import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.emf.common.util.URI;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jst.j2ee.commonarchivecore.internal.Archive;
import org.eclipse.jst.j2ee.commonarchivecore.internal.EARFile;
import org.eclipse.jst.j2ee.commonarchivecore.internal.File;
import org.eclipse.jst.j2ee.commonarchivecore.internal.util.ArchiveUtil;
import org.eclipse.jst.j2ee.internal.archive.operations.J2EEImportConstants;
import org.eclipse.jst.j2ee.internal.plugin.J2EEPlugin;
import org.eclipse.jst.j2ee.internal.project.J2EEProjectUtilities;
import org.eclipse.wst.common.componentcore.ComponentCore;
import org.eclipse.wst.common.componentcore.UnresolveableURIException;
import org.eclipse.wst.common.componentcore.internal.impl.ModuleURIUtil;
import org.eclipse.wst.common.componentcore.resources.IVirtualComponent;
import org.eclipse.wst.common.componentcore.resources.IVirtualReference;


public class ClasspathElement {
	public final static int UTIL_JAR = 0;
	public final static int EJB_JAR = 1;
	public final static int EJB_CLIENT_JAR = 2;
	protected int jarType = UTIL_JAR;
	/** The owner archive of this entry */
	protected Archive archive;

	/** The archive this entry references, if it exists */
	protected Archive targetArchive;

	/** The display text for this item */
	protected String text;
	/** Indicates if this is selected in the view */
	protected boolean selected;
	protected boolean valid;
	/** Indicates if this element represents a component dependency associated with a resolved Java classpath entry that is mapped to the virtual component api */
	protected boolean isClasspathDependency = false; 
	/** Indicates if this element represents a Java classpath entry */
	protected boolean isClasspathEntry= false; 
	/** For elments that represent a Java classpath entry, holds the entry */
	protected IClasspathEntry classpathEntry = null;
	
	/**
	 * The text that is an actual Class-Path entry in the Manifest; in the case of multi-segment
	 * uris, might look like ../xxx
	 */
	protected String relativeText;
	/** The project that corresponds to the dependent module, when it exists */
	protected IProject project;
	/**
	 * If the project is not null, there may be imported jars in the project List of IPath
	 */
	protected List importedJarPaths;
	protected IProject earProject;
	protected ClassPathSelection parentSelection;
	protected URI archiveURI;
	protected String earContentFolder;
	protected IVirtualComponent component;
	protected IVirtualComponent targetComponent;

	public ClasspathElement(Archive anArchive) {
		super();
		archive = anArchive;
	}
	
	public ClasspathElement(IProject project) {
		super();
		this.project = project;
	}
	
	public ClasspathElement(URI  aArchiveURI) {
		super();
		archiveURI = aArchiveURI;
	}	

	public ClasspathElement(IVirtualComponent aComponent) {
		super();
		this.component = aComponent;
		this.project = aComponent.getProject();
	}

	protected void computeRelativeText() {
		if (archive != null) {
			relativeText = J2EEProjectUtilities.computeRelativeText(archive.getURI(), getText());
			if (relativeText == null)
				relativeText = getText();
		}
		if (component != null)
		{
			IVirtualComponent earComponent = ComponentCore.createComponent(earProject);
			IVirtualReference[] refs = earComponent.getReferences();
			IVirtualReference reference = null;
			String archiveURI = null;
			for (int i = 0; i < refs.length; i++) {
				reference = refs[i];
				if( component.equals(reference.getReferencedComponent())){
					archiveURI = reference.getArchiveName();
				}
			}
			if (archiveURI != null)
			{
				relativeText = J2EEProjectUtilities.computeRelativeText(archiveURI, getText());
			}
			if (relativeText == null)
				relativeText = getText();
		}
	}

	/**
	 * Insert the method's description here. Creation date: (8/28/2001 5:07:26 PM)
	 * 
	 * @return org.eclipse.core.resources.IProject
	 */
	public org.eclipse.core.resources.IProject getEarProject() {
		return earProject;
	}

	protected IFile getImportedJarAsIFile() {
		if (getProject() != null) {
			if (getText() != null && getText().endsWith(J2EEImportConstants.IMPORTED_JAR_SUFFIX)) {
				IFile file = getProject().getFile(getText());
				if (file != null && file.exists())
					return file;
			}
		}
		return null;
	}

	/**
	 * Insert the method's description here. Creation date: (8/28/2001 4:33:35 PM)
	 * 
	 * @return java.util.List
	 */
	public java.util.List getImportedJarPaths() {
		return importedJarPaths;
	}

	/**
	 * Insert the method's description here. Creation date: (8/27/2001 1:14:04 PM)
	 * 
	 * @return int
	 */
	public int getJarType() {
		return jarType;
	}

	/**
	 * Insert the method's description here. Creation date: (8/25/2001 6:21:01 PM)
	 * 
	 * @return org.eclipse.core.resources.IProject
	 */
	public org.eclipse.core.resources.IProject getProject() {
		return project;
	}

	public IVirtualComponent getComponent() {
		if(project != null){
			return ComponentCore.createComponent(project);
		} else if(relativeText != null){
			IVirtualComponent earComponent = ComponentCore.createComponent(earProject);
			if(earComponent != null) {
				IVirtualReference[] refs = earComponent.getReferences();
				for (int i = 0; i < refs.length; i++) {
					IVirtualReference reference = refs[i];
					if( reference.getReferencedComponent() != null ){
						String name = reference.getReferencedComponent().getName();
						if(name.lastIndexOf('/') != -1){
							name = name.substring(name.lastIndexOf('/')+1);
						}
						if (name.equals(relativeText)){
							return reference.getReferencedComponent();
						}
					}
				}
			}
		}
		return null;
	}
	
	
	public String getProjectName() {
		return project == null ? null : project.getName();
	}

	public java.lang.String getRelativeText() {
		if (relativeText == null)
			computeRelativeText();
		return relativeText;
	}

	/**
	 * Insert the method's description here. Creation date: (8/22/2001 11:00:36 AM)
	 * 
	 * @return java.lang.String
	 */
	public java.lang.String getText() {
		return text;
	}

	/**
	 * Insert the method's description here. Creation date: (8/22/2001 11:01:46 AM)
	 * 
	 * @return boolean
	 */
	public boolean isSelected() {
		return selected;
	}

	/**
	 * Determines if this ClasspathElement is associated with a resolved Java classpath entry 
	 * that is tagged as a component dependency.
	 * @return True if a classpath component dependency.
	 */
	public boolean isClasspathDependency() {
		return isClasspathDependency;
	}
	
	/**
	 * Sets whether this ClasspathElement is associated with a resolved Java classpath entry 
	 * that is tagged as a component dependency.
	 * @param classpathDependency True if a classpath component dependency.
	 */
	public void setClasspathDependency(final boolean classpathDependency) {
		this.isClasspathDependency = classpathDependency;
	}
	
	/**
	 * Determines if this ClasspathElement is associated with a Java classpath entry 
	 * that is either currently tagged or can be tagged as a component dependency.
	 * @return True if a classpath component dependency.
	 */
	public boolean isClasspathEntry() {
		return isClasspathEntry;
	}
	
	/**
	 * Sets whether this ClasspathElement is associated with a Java classpath entry 
	 * that is either currently tagged or can be tagged as a component dependency.
	 * @param isClasspathEntry True if a classpath entry.
	 * @param entry The associated classpath entry.
	 */
	public void setClasspathEntry(final boolean isClasspathEntry, final IClasspathEntry entry) {
		this.isClasspathEntry= isClasspathEntry;
		this.classpathEntry = entry;
	}
	
	/**
	 * Retrieves any associated classpath entry.
	 * @return Associated classpath entry, if there is one.
	 */
	public IClasspathEntry getClasspathEntry() {
		return classpathEntry;
	}

	/**
	 * Insert the method's description here. Creation date: (8/27/2001 1:04:35 PM)
	 * 
	 * @return boolean
	 */
	public boolean isValid() {
		return valid;
	}

	public IResource getResource() {
		if (project != null)
			return project;
		return earProject.getFile(getText());
	}

	public IClasspathEntry[] newClasspathEntriesForArchive() {
		if( !archiveURI.equals("")){ //$NON-NLS-1$
			String resourcePath = ""; //$NON-NLS-1$
			try {
				resourcePath = ModuleURIUtil.getArchiveName(archiveURI);
			} catch (UnresolveableURIException e) {
				J2EEPlugin.logError(e);
			}
			IPath resPath = new Path(resourcePath);
			if (!resPath.isAbsolute())
				resPath = resPath.makeAbsolute();
			java.io.File file = new java.io.File(resourcePath);
			if( file.exists() || J2EEPlugin.getWorkspace().getRoot().exists(new Path(resourcePath))){
				return new IClasspathEntry[]{JavaCore.newLibraryEntry( resPath, null, null, true)};
			}
			return new IClasspathEntry[]{JavaCore.newVariableEntry( resPath, null, null)};
		}	
		return new IClasspathEntry[0];
	}
	
	
	/**
	 * Adapter method to convert this manifest class path element to zero or more classpath entries
	 * for a java build path
	 */
	public IClasspathEntry[] newClasspathEntries(Set visited) {
		if (visited.contains(this))
			return new IClasspathEntry[0];
		visited.add(this);
		if (representsImportedJar())
			return new IClasspathEntry[]{JavaCore.newLibraryEntry(getImportedJarAsIFile().getFullPath(), null, null)};
		
		if( archiveURI != null && !archiveURI.equals("") ){ //$NON-NLS-1$
			return newClasspathEntriesForArchive();
		}
		if (!valid && isSelected())
			return new IClasspathEntry[0];

		if (project == null)
			return newClasspathEntriesFromEARProject(visited);

		IClasspathEntry projectEntry = JavaCore.newProjectEntry(getProject().getFullPath(), true);
		if (importedJarPaths == null || importedJarPaths.isEmpty())
			return new IClasspathEntry[]{projectEntry};

		List result = new ArrayList(2);
		result.add(projectEntry);
		for (int i = 0; i < importedJarPaths.size(); i++) {
			IPath path = (IPath) importedJarPaths.get(i);
			result.add(JavaCore.newLibraryEntry(path, null, null));
		}
		return (IClasspathEntry[]) result.toArray(new IClasspathEntry[result.size()]);
	}

	public IClasspathEntry[] newClasspathEntries() {
		return newClasspathEntries(new HashSet());
	}

	protected IClasspathEntry newClasspathEntryFromEARProj() {
		IPath path = earProject.getFullPath().append( getEarContentFolder() + IPath.SEPARATOR + earProject.getFile(getText()).getProjectRelativePath());
		return JavaCore.newLibraryEntry(path, path, null, true);
	}

	/**
	 * The archive is in the EAR and not in a project.
	 */
	protected IClasspathEntry[] newClasspathEntriesFromEARProject(Set visited) {
		List cpEntries = new ArrayList();
		cpEntries.add(newClasspathEntryFromEARProj());
		traverseClasspaths(cpEntries, visited);
		return (IClasspathEntry[]) cpEntries.toArray(new IClasspathEntry[cpEntries.size()]);
	}

	/*
	 * If you have a dependency to a JAR in the EAR project, and the JAR depends on another JAR in
	 * the EAR; you want to compile cleanly after import, so you need both those JARs on your build
	 * path
	 */
	protected void traverseClasspaths(List projectCpEntries, Set visited) {

		File aFile = null;
		try {
			aFile = getEARFile().getFile(getText());
		} catch (FileNotFoundException notThere) {
		}
		if (aFile == null || !aFile.isArchive())
			return;

		Archive depArchive = (Archive) aFile;
		String[] manifestCpEntries = depArchive.getManifest().getClassPathTokenized();
		for (int i = 0; i < manifestCpEntries.length; i++) {
			String uri = ArchiveUtil.deriveEARRelativeURI(manifestCpEntries[i], depArchive);
			if (uri == null)
				continue;
			ClasspathElement other = parentSelection.getClasspathElement(uri);
			//If the other element is already selected, then
			// we don't need to add it again
			if (other == null || other.isSelected())
				continue;
			IClasspathEntry[] cpEntries = other.newClasspathEntries(visited);
			for (int j = 0; j < cpEntries.length; j++) {
				if (!projectCpEntries.contains(cpEntries[j]))
					projectCpEntries.add(cpEntries[j]);
			}
		}
	}


	public boolean representsImportedJar() {
		return getImportedJarAsIFile() != null;
	}

	/**
	 * Insert the method's description here. Creation date: (8/28/2001 5:07:26 PM)
	 * 
	 * @param newEarProject
	 *            org.eclipse.core.resources.IProject
	 */
	public void setEarProject(org.eclipse.core.resources.IProject newEarProject) {
		earProject = newEarProject;
	}

	/**
	 * Insert the method's description here. Creation date: (8/28/2001 4:33:35 PM)
	 * 
	 * @param newImportedJarPaths
	 *            java.util.List
	 */
	public void setImportedJarPaths(java.util.List newImportedJarPaths) {
		importedJarPaths = newImportedJarPaths;
	}

	/**
	 * Insert the method's description here. Creation date: (8/27/2001 1:14:04 PM)
	 * 
	 * @param newJarType
	 *            int
	 */
	public void setJarType(int newJarType) {
		jarType = newJarType;
	}

	/**
	 * Insert the method's description here. Creation date: (8/25/2001 6:21:01 PM)
	 * 
	 * @param newProject
	 *            org.eclipse.core.resources.IProject
	 */
	public void setProject(org.eclipse.core.resources.IProject newProject) {
		project = newProject;
	}

	/**
	 * Insert the method's description here. Creation date: (8/22/2001 4:20:55 PM)
	 * 
	 * @param newRelativeText
	 *            java.lang.String
	 */
	public void setRelativeText(java.lang.String newRelativeText) {
		relativeText = newRelativeText;
	}

	public void setSelected(Archive referencingJar, Archive referencedJar, List classPath) {
		for (int i = 0; i < classPath.size(); i++) {
			String cpEntry = (String) classPath.get(i);
			String uri = ArchiveUtil.deriveEARRelativeURI(cpEntry, referencingJar);
			if (uri != null && uri.equals(referencedJar.getURI())) {
				setSelected(true);
				return;
			}
		}
		setSelected(false);
	}

	/**
	 * Insert the method's description here. Creation date: (8/22/2001 11:01:46 AM)
	 * 
	 * @param newSelected
	 *            boolean
	 */
	public void setSelected(boolean newSelected) {
		boolean oldSelected = selected;
		selected = newSelected;
		if (oldSelected != newSelected && parentSelection != null)
			parentSelection.setModified(true);
	}

	/**
	 * Insert the method's description here. Creation date: (8/22/2001 11:00:36 AM)
	 * 
	 * @param newText
	 *            java.lang.String
	 */
	public void setText(java.lang.String newText) {
		text = newText;
	}

	/**
	 * Insert the method's description here. Creation date: (8/27/2001 1:04:35 PM)
	 * 
	 * @param newValid
	 *            boolean
	 */
	public void setValid(boolean newValid) {
		valid = newValid;
	}

	public void setValuesSelected(String cpEntry) {
		setSelected(true);
		setRelativeText(cpEntry);
	}

	@Override
	public String toString() {
		return "ClasspatheElement(" + getText() + ")"; //$NON-NLS-1$ //$NON-NLS-2$
	}

	protected EARFile getEARFile() {
		return (EARFile) archive.getContainer();
	}

	void setParentSelection(ClassPathSelection selection) {
		parentSelection = selection;
	}

	/**
	 * Returns the archive.
	 * 
	 * @return Archive
	 */
	public Archive getArchive() {
		return archive;
	}

	public boolean isEJBJar() {
		return jarType == EJB_JAR;
	}

	public boolean isEJBClientJar() {
		return jarType == EJB_CLIENT_JAR;
	}

	/**
	 * @return
	 */
	public Archive getTargetArchive() {
		return targetArchive;
	}

	/**
	 * @return
	 */
	public IVirtualComponent getTargetComponent() {
		return targetComponent;
	}

	/**
	 * @param archive
	 */
	public void setTargetArchive(Archive archive) {
		targetArchive = archive;
	}

	public void setTargetComponent(IVirtualComponent aTargetComponent) {
		targetComponent = aTargetComponent;
	}

	public URI getArchiveURI() {
		return archiveURI;
	}

	public String getEarContentFolder() {
		return earContentFolder;
	}

	public void setEarContentFolder(String earContentFolder) {
		this.earContentFolder = earContentFolder;
	}

}