/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package net.sourceforge.phpdt.internal.core;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.Map;

import net.sourceforge.phpdt.core.ICompilationUnit;
import net.sourceforge.phpdt.core.IJavaElement;
import net.sourceforge.phpdt.core.IPackageFragment;
import net.sourceforge.phpdt.core.IPackageFragmentRoot;
import net.sourceforge.phpdt.core.JavaModelException;
import net.sourceforge.phpdt.core.WorkingCopyOwner;
import net.sourceforge.phpdt.internal.core.util.MementoTokenizer;
import net.sourceforge.phpdt.internal.core.util.Util;
import net.sourceforge.phpdt.internal.core.util.PHPFileUtil;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Path;

/**
 * @see IPackageFragment
 */
public class PackageFragment extends Openable implements IPackageFragment {
	/**
	 * Constant empty list of compilation units
	 */
	protected static ICompilationUnit[] fgEmptyCompilationUnitList = new ICompilationUnit[] {};

	/**
	 * Constructs a handle for a package fragment
	 * 
	 * @see IPackageFragment
	 */
	protected PackageFragment(PackageFragmentRoot root, String name) {
		super(root, name);
	}

	/**
	 * @see Openable
	 */
	protected boolean buildStructure(OpenableElementInfo info,
			IProgressMonitor pm, Map newElements, IResource underlyingResource)
			throws JavaModelException {

		// check whether this pkg can be opened
		if (!underlyingResource.isAccessible())
			throw newNotPresentException();

		//int kind = getKind();
		String extType;
		// if (kind == IPackageFragmentRoot.K_SOURCE) {
		extType = "php"; // EXTENSION_java;
		// } else {
		// extType = EXTENSION_class;
		// }

		// add compilation units/class files from resources
		HashSet vChildren = new HashSet();
		try {
			PackageFragmentRoot root = getPackageFragmentRoot();
			// char[][] inclusionPatterns = root.fullInclusionPatternChars();
			char[][] exclusionPatterns = root.fullExclusionPatternChars();
			IResource[] members = ((IContainer) underlyingResource).members();
			for (int i = 0, max = members.length; i < max; i++) {
				IResource child = members[i];
				if (child.getType() != IResource.FOLDER
						&& !Util.isExcluded(child, exclusionPatterns)) {
					String extension = child.getProjectRelativePath()
							.getFileExtension();
					if (extension != null) {
						if (extension.equalsIgnoreCase(extType)) {
							//IJavaElement childElement;
							// if (kind == IPackageFragmentRoot.K_SOURCE &&
							// ProjectPrefUtil.isValidCompilationUnitName(child.getName()))
							// {
							// childElement = new CompilationUnit(this,
							// child.getName(),
							// DefaultWorkingCopyOwner.PRIMARY);
							// vChildren.add(childElement);
							// } else if
							// (ProjectPrefUtil.isValidClassFileName(child.getName()))
							// {
							// childElement = getClassFile(child.getName());
							// vChildren.add(childElement);
							// }
						}
					}
				}
			}
		} catch (CoreException e) {
			throw new JavaModelException(e);
		}

		// if (kind == IPackageFragmentRoot.K_SOURCE) {
		// // add primary compilation units
		// ICompilationUnit[] primaryCompilationUnits =
		// getCompilationUnits(DefaultWorkingCopyOwner.PRIMARY);
		// for (int i = 0, length = primaryCompilationUnits.length; i < length;
		// i++) {
		// ICompilationUnit primary = primaryCompilationUnits[i];
		// vChildren.add(primary);
		// }
		// }

		IJavaElement[] children = new IJavaElement[vChildren.size()];
		vChildren.toArray(children);
		info.setChildren(children);
		return true;
	}

	// /**
	// * Compute the children of this package fragment.
	// *
	// * <p>Package fragments which are folders recognize files based on the
	// * type of the fragment
	// * <p>Package fragments which are in a jar only recognize .class files (
	// * @see JarPackageFragment).
	// */
	// protected boolean computeChildren(OpenableElementInfo info, IResource
	// resource) throws JavaModelException {
	// ArrayList vChildren = new ArrayList();
	// // int kind = getKind();
	// String extType;
	// // if (kind == IPackageFragmentRoot.K_SOURCE) {
	// extType = "php"; //$NON-NLS-1$
	// // } else {
	// // extType = "class"; //$NON-NLS-1$
	// // }
	// try {
	// char[][] exclusionPatterns =
	// ((PackageFragmentRoot)getPackageFragmentRoot()).fullExclusionPatternChars();
	// IResource[] members = ((IContainer) resource).members();
	// for (int i = 0, max = members.length; i < max; i++) {
	// IResource child = members[i];
	// if (child.getType() != IResource.FOLDER
	// && !ProjectPrefUtil.isExcluded(child, exclusionPatterns)) {
	// String extension = child.getProjectRelativePath().getFileExtension();
	// if (extension != null) {
	// if (extension.equalsIgnoreCase(extType)) {
	// IJavaElement childElement;
	// // if (kind == IPackageFragmentRoot.K_SOURCE &&
	// ProjectPrefUtil.isValidCompilationUnitName(child.getName())) {
	// // childElement = getCompilationUnit(child.getName());
	// // vChildren.add(childElement);
	// // } else if (ProjectPrefUtil.isValidClassFileName(child.getName())) {
	// // childElement = getClassFile(child.getName());
	// // vChildren.add(childElement);
	// // }
	// }
	// }
	// }
	// }
	// } catch (CoreException e) {
	// throw new JavaModelException(e);
	// }
	// IJavaElement[] children = new IJavaElement[vChildren.size()];
	// vChildren.toArray(children);
	// info.setChildren(children);
	// return true;
	// }
	/**
	 * Returns true if this fragment contains at least one java resource.
	 * Returns false otherwise.
	 */
	// public boolean containsJavaResources() throws JavaModelException {
	// return ((PackageFragmentInfo) getElementInfo()).containsJavaResources();
	// }
	/**
	 * @see ISourceManipulation
	 */
	// public void copy(IJavaElement container, IJavaElement sibling, String
	// rename, boolean force, IProgressMonitor monitor) throws
	// JavaModelException {
	// if (container == null) {
	// throw new
	// IllegalArgumentException(ProjectPrefUtil.bind("operation.nullContainer"));
	// //$NON-NLS-1$
	// }
	// IJavaElement[] elements= new IJavaElement[] {this};
	// IJavaElement[] containers= new IJavaElement[] {container};
	// IJavaElement[] siblings= null;
	// if (sibling != null) {
	// siblings= new IJavaElement[] {sibling};
	// }
	// String[] renamings= null;
	// if (rename != null) {
	// renamings= new String[] {rename};
	// }
	// getJavaModel().copy(elements, containers, siblings, renamings, force,
	// monitor);
	// }
	/**
	 * @see IPackageFragment
	 */
	public ICompilationUnit createCompilationUnit(String name, String contents,
			boolean force, IProgressMonitor monitor) throws JavaModelException {
		// CreateCompilationUnitOperation op= new
		// CreateCompilationUnitOperation(this, name, contents, force);
		// runOperation(op, monitor);
		// return getCompilationUnit(name);
		return null;
	}

	/**
	 * @see JavaElement
	 */
	protected Object createElementInfo() {
		return new PackageFragmentInfo();
	}

	/**
	 * @see ISourceManipulation
	 */
	// public void delete(boolean force, IProgressMonitor monitor) throws
	// JavaModelException {
	// IJavaElement[] elements = new IJavaElement[] {this};
	// getJavaModel().delete(elements, force, monitor);
	// }
	// /**
	// * @see Openable
	// */
	// protected boolean generateInfos(OpenableElementInfo info,
	// IProgressMonitor pm, Map newElements, IResource underlyingResource)
	// throws JavaModelException {
	//	
	// return computeChildren(info, underlyingResource);
	// }
	// /**
	// * @see IPackageFragment#getClassFile(String)
	// */
	// public IClassFile getClassFile(String name) {
	// return new ClassFile(this, name);
	// }
	/**
	 * Returns a the collection of class files in this - a folder package
	 * fragment which has a root that has its kind set to
	 * <code>IPackageFragmentRoot.K_Source</code> does not recognize class
	 * files.
	 * 
	 * @see IPackageFragment#getClassFiles()
	 */
	// public IClassFile[] getClassFiles() throws JavaModelException {
	// if (getKind() == IPackageFragmentRoot.K_SOURCE) {
	// return fgEmptyClassFileList;
	// }
	//	
	// ArrayList list = getChildrenOfType(CLASS_FILE);
	// IClassFile[] array= new IClassFile[list.size()];
	// list.toArray(array);
	// return array;
	// }
	/**
	 * @see IPackageFragment#getCompilationUnit(String)
	 * @exception IllegalArgumentExcpetion
	 *                if the name does not end with a php file extension
	 */
	public ICompilationUnit getCompilationUnit(String cuName) {
		if (!PHPFileUtil.isValidPHPUnitName(cuName)) {
			throw new IllegalArgumentException(Util
					.bind("convention.unit.notJavaName")); //$NON-NLS-1$
		}
		return new CompilationUnit(this, cuName,
				DefaultWorkingCopyOwner.PRIMARY);
	}

	/**
	 * @see IPackageFragment#getCompilationUnits()
	 */
	public ICompilationUnit[] getCompilationUnits() throws JavaModelException {
		if (getKind() == IPackageFragmentRoot.K_BINARY) {
			return fgEmptyCompilationUnitList;
		}

		ArrayList list = getChildrenOfType(COMPILATION_UNIT);
		ICompilationUnit[] array = new ICompilationUnit[list.size()];
		list.toArray(array);
		return array;
	}

	/**
	 * @see IJavaElement
	 */
	public int getElementType() {
		return PACKAGE_FRAGMENT;
	}

	/*
	 * @see JavaElement
	 */
	public IJavaElement getHandleFromMemento(String token,
			MementoTokenizer memento, WorkingCopyOwner owner) {
		switch (token.charAt(0)) {
		case JEM_COUNT:
			return getHandleUpdatingCountFromMemento(memento, owner);
			// case JEM_CLASSFILE:
			// String classFileName = memento.nextToken();
			// JavaElement classFile = (JavaElement)getClassFile(classFileName);
			// return classFile.getHandleFromMemento(memento, owner);
		case JEM_COMPILATIONUNIT:
			String cuName = memento.nextToken();
			JavaElement cu = new CompilationUnit(this, cuName, owner);
			return cu.getHandleFromMemento(memento, owner);
		}
		return null;
	}

	/**
	 * @see JavaElement#getHandleMementoDelimiter()
	 */
	protected char getHandleMementoDelimiter() {
		return JavaElement.JEM_PACKAGEFRAGMENT;
	}

	/**
	 * @see IPackageFragment#getKind()
	 */
	public int getKind() throws JavaModelException {
		return ((IPackageFragmentRoot) getParent()).getKind();
	}

	/**
	 * Returns an array of non-java resources contained in the receiver.
	 */
	// public Object[] getNonJavaResources() throws JavaModelException {
	// if (this.isDefaultPackage()) {
	// // We don't want to show non java resources of the default package (see
	// PR #1G58NB8)
	// return JavaElementInfo.NO_NON_JAVA_RESOURCES;
	// } else {
	// return ((PackageFragmentInfo)
	// getElementInfo()).getNonJavaResources(getResource(),
	// (PackageFragmentRoot)getPackageFragmentRoot());
	// }
	// }
	/**
	 * @see IJavaElement#getPath()
	 */
	public IPath getPath() {
		PackageFragmentRoot root = this.getPackageFragmentRoot();
		if (root.isArchive()) {
			return root.getPath();
		} else {
			// return root.getPath().append(this.getElementName().replace('.',
			// '/'));
			return root.getPath().append(this.getElementName());
		}
	}

	/**
	 * @see IJavaElement#getResource()
	 */
	public IResource getResource() {
		PackageFragmentRoot root = this.getPackageFragmentRoot();
		if (root.isArchive()) {
			return root.getResource();
		} else {
			String elementName = this.getElementName();
			if (elementName.length() == 0) {
				return root.getResource();
			} else {
				// return ((IContainer)root.getResource()).getFolder(new
				// Path(this.getElementName().replace('.', '/')));
				return ((IContainer) root.getResource()).getFolder(new Path(
						this.getElementName()));
			}
		}
	}

	/**
	 * @see IJavaElement#getUnderlyingResource()
	 */
	public IResource getUnderlyingResource() throws JavaModelException {
		IResource rootResource = parent.getUnderlyingResource();
		if (rootResource == null) {
			// jar package fragment root that has no associated resource
			return null;
		}
		// the underlying resource may be a folder or a project (in the case
		// that the project folder
		// is atually the package fragment root)
		// if (rootResource.getType() == IResource.FOLDER ||
		// rootResource.getType() == IResource.PROJECT) {
		// IContainer folder = (IContainer) rootResource;
		// String[] segs = Signature.getSimpleNames(fName);
		// for (int i = 0; i < segs.length; ++i) {
		// IResource child = folder.findMember(segs[i]);
		// if (child == null || child.getType() != IResource.FOLDER) {
		// throw newNotPresentException();
		// }
		// folder = (IFolder) child;
		// }
		// return folder;
		// } else {
		return rootResource;
		// }
	}

	/**
	 * @see IPackageFragment#hasSubpackages()
	 */
	// public boolean hasSubpackages() throws JavaModelException {
	// IJavaElement[] packages=
	// ((IPackageFragmentRoot)getParent()).getChildren();
	// String name = getElementName();
	// int nameLength = name.length();
	// String packageName = isDefaultPackage() ? name : name+"."; //$NON-NLS-1$
	// for (int i= 0; i < packages.length; i++) {
	// String otherName = packages[i].getElementName();
	// if (otherName.length() > nameLength && otherName.startsWith(packageName))
	// {
	// return true;
	// }
	// }
	// return false;
	// }
	/**
	 * @see IPackageFragment#isDefaultPackage()
	 */
	public boolean isDefaultPackage() {
		return this.getElementName().length() == 0;
	}

	/**
	 * @see ISourceManipulation#move(IJavaElement, IJavaElement, String,
	 *      boolean, IProgressMonitor)
	 */
	// public void move(IJavaElement container, IJavaElement sibling, String
	// rename, boolean force, IProgressMonitor monitor) throws
	// JavaModelException {
	// if (container == null) {
	// throw new
	// IllegalArgumentException(ProjectPrefUtil.bind("operation.nullContainer"));
	// //$NON-NLS-1$
	// }
	// IJavaElement[] elements= new IJavaElement[] {this};
	// IJavaElement[] containers= new IJavaElement[] {container};
	// IJavaElement[] siblings= null;
	// if (sibling != null) {
	// siblings= new IJavaElement[] {sibling};
	// }
	// String[] renamings= null;
	// if (rename != null) {
	// renamings= new String[] {rename};
	// }
	// getJavaModel().move(elements, containers, siblings, renamings, force,
	// monitor);
	// }
	// protected void openWhenClosed(IProgressMonitor pm) throws
	// JavaModelException {
	// if (!this.resourceExists()) throw newNotPresentException();
	// super.openWhenClosed(pm);
	// }
	/**
	 * Recomputes the children of this element, based on the current state of
	 * the workbench.
	 */
	// public void refreshChildren() {
	// try {
	// OpenableElementInfo info= (OpenableElementInfo)getElementInfo();
	// computeChildren(info, getResource());
	// } catch (JavaModelException e) {
	// // do nothing.
	// }
	// }
	/**
	 * @see ISourceManipulation#rename(String, boolean, IProgressMonitor)
	 */
	// public void rename(String name, boolean force, IProgressMonitor monitor)
	// throws JavaModelException {
	// if (name == null) {
	// throw new
	// IllegalArgumentException(ProjectPrefUtil.bind("element.nullName"));
	// //$NON-NLS-1$
	// }
	// IJavaElement[] elements= new IJavaElement[] {this};
	// IJavaElement[] dests= new IJavaElement[] {this.getParent()};
	// String[] renamings= new String[] {name};
	// getJavaModel().rename(elements, dests, renamings, force, monitor);
	// }
	// /*
	// * @see JavaElement#rootedAt(IJavaProject)
	// */
	// public IJavaElement rootedAt(IJavaProject project) {
	// return
	// new PackageFragment(
	// (IPackageFragmentRoot)((JavaElement)parent).rootedAt(project),
	// name);
	// }
	/**
	 * Debugging purposes
	 */
	protected void toStringChildren(int tab, StringBuffer buffer, Object info) {
		if (tab == 0) {
			super.toStringChildren(tab, buffer, info);
		}
	}

	/**
	 * Debugging purposes
	 */
	protected void toStringInfo(int tab, StringBuffer buffer, Object info) {
		buffer.append(this.tabString(tab));
		if (getElementName().length() == 0) {
			buffer.append("[default]"); //$NON-NLS-1$
		} else {
			buffer.append(getElementName());
		}
		if (info == null) {
			buffer.append(" (not open)"); //$NON-NLS-1$
		} else {
			if (tab > 0) {
				buffer.append(" (...)"); //$NON-NLS-1$
			}
		}
	}
}