/*******************************************************************************
 * Copyright (c) 2000, 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
 *
 
 *******************************************************************************/
package org.eclipse.php.internal.ui.workingset;

import java.util.ArrayList;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.dltk.core.IProjectFragment;
import org.eclipse.dltk.core.IScriptModel;
import org.eclipse.dltk.core.IScriptProject;
import org.eclipse.dltk.core.ModelException;
import org.eclipse.dltk.internal.core.ExternalProjectFragment;
import org.eclipse.dltk.internal.ui.StandardModelElementContentProvider;

class PHPWorkingSetPageContentProvider extends StandardModelElementContentProvider {

	@Override
	public boolean hasChildren(Object element) {

		if (element instanceof IProject && !((IProject) element).isAccessible())
			return false;

		return super.hasChildren(element);
	}

	@Override
	public Object[] getChildren(Object parentElement) {
		try {
			if (parentElement instanceof IScriptModel)
				return concatenate(super.getChildren(parentElement), getForeignProjects((IScriptModel) parentElement));

			if (parentElement instanceof IProject)
				return ((IProject) parentElement).members();

			if (parentElement instanceof IScriptProject)
				return concatenate(((IScriptProject) parentElement).getProject().members(IContainer.FOLDER),
						getExternalProjectFragments((IScriptProject) parentElement));

			return super.getChildren(parentElement);
		} catch (CoreException e) {
			return NO_CHILDREN;
		}
	}

	private Object[] getExternalProjectFragments(IScriptProject project) throws ModelException {

		IProjectFragment[] fragments = project.getProjectFragments();
		IProjectFragment[] externalFragments;

		if (fragments != null) {
			ArrayList<IProjectFragment> collect = new ArrayList<>();
			for (IProjectFragment fragment : fragments) {
				if (fragment instanceof ExternalProjectFragment) {
					collect.add(fragment);
				}
			}
			externalFragments = new IProjectFragment[collect.size()];
			externalFragments = collect.toArray(externalFragments);

		} else {
			externalFragments = new IProjectFragment[0];
		}

		return externalFragments;

	}

	private Object[] getForeignProjects(IScriptModel model) throws ModelException {
		return model.getForeignResources();
	}

	@Override
	public Object getParent(Object element) {
		if (element instanceof IResource) {
			IResource parent = ((IResource) element).getParent();
			if (!(parent instanceof IProject)) {
				return parent;
			}
		}
		return super.getParent(element);
	}
}