/***************************************************************************************************
 * Copyright (c) 2005 Eteration A.S. and Gorkem Ercan. 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: Gorkem Ercan - initial API and implementation
 *               
 **************************************************************************************************/
package org.eclipse.jst.server.generic.core.internal;

import java.util.ArrayList;
import java.util.List;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.sourcelookup.ISourceContainer;
import org.eclipse.debug.core.sourcelookup.ISourcePathComputerDelegate;
import org.eclipse.debug.core.sourcelookup.containers.FolderSourceContainer;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.launching.IRuntimeClasspathEntry;
import org.eclipse.jdt.launching.JavaRuntime;
import org.eclipse.wst.server.core.IModule;
import org.eclipse.wst.server.core.IServer;
import org.eclipse.wst.server.core.ServerUtil;
/**
 * SourcePathComputer for the GenericLaunchConfiguration.
 * 
 * @author Gorkem Ercan
 */
public class GenericServerSourcePathComputerDelegate implements ISourcePathComputerDelegate  {

	/* (non-Javadoc)
	 * @see org.eclipse.debug.core.sourcelookup.ISourcePathComputerDelegate#computeSourceContainers(org.eclipse.debug.core.ILaunchConfiguration, org.eclipse.core.runtime.IProgressMonitor)
	 */
	public ISourceContainer[] computeSourceContainers(ILaunchConfiguration configuration, IProgressMonitor monitor) throws CoreException {
		
		IRuntimeClasspathEntry[] unresolvedEntries = JavaRuntime.computeUnresolvedSourceLookupPath(configuration);
		List<ISourceContainer> sourcefolderList = new ArrayList<ISourceContainer>();
		
		IServer server =  ServerUtil.getServer(configuration);
		IModule[] modules = server.getModules();
		
		List<IJavaProject> javaProjectList = new ArrayList<IJavaProject>();
		
		processModules(sourcefolderList, modules, javaProjectList, server,monitor);


		IRuntimeClasspathEntry[] projectEntries = new IRuntimeClasspathEntry[javaProjectList.size()];
		for (int i = 0; i < javaProjectList.size(); i++) {
			projectEntries[i] = JavaRuntime.newDefaultProjectClasspathEntry(javaProjectList.get(i)); 
		}
		IRuntimeClasspathEntry[] entries =  new IRuntimeClasspathEntry[projectEntries.length+unresolvedEntries.length]; 
		System.arraycopy(unresolvedEntries,0,entries,0,unresolvedEntries.length);
		System.arraycopy(projectEntries,0,entries,unresolvedEntries.length,projectEntries.length);
		
		IRuntimeClasspathEntry[] resolved = JavaRuntime.resolveSourceLookupPath(entries, configuration);
		ISourceContainer[] javaSourceContainers = JavaRuntime.getSourceContainers(resolved);
		
		if (!sourcefolderList.isEmpty()) {
			ISourceContainer[] combinedSourceContainers = new ISourceContainer[javaSourceContainers.length + sourcefolderList.size()];
			sourcefolderList.toArray(combinedSourceContainers);
			System.arraycopy(javaSourceContainers, 0, combinedSourceContainers, sourcefolderList.size(), javaSourceContainers.length);
			javaSourceContainers = combinedSourceContainers;
		}
		
		return javaSourceContainers;
		
	}

	private void processModules(List<ISourceContainer> sourcefolderList, IModule[] modules, List<IJavaProject> javaProjectList, IServer server, IProgressMonitor monitor) {
		for (int i = 0; i < modules.length; i++) {
			IProject project = modules[i].getProject();
			IModule[] pModule = new IModule[1];
			pModule[0]=modules[i];
			IModule[] cModule = server.getChildModules(pModule, monitor);
			if(cModule != null && cModule.length>0)
			{
				processModules(sourcefolderList, cModule, javaProjectList, server, monitor);
			}
			if (project != null) {
				IFolder moduleFolder = project.getFolder(modules[i].getName());
				if (moduleFolder.exists()) {
					sourcefolderList.add(new FolderSourceContainer(moduleFolder, true));
				} else {
					try {
						if (project.hasNature(JavaCore.NATURE_ID)) {
							IJavaProject javaProject = (IJavaProject) project.getNature(JavaCore.NATURE_ID);
							if(!javaProjectList.contains(javaProject)){
								javaProjectList.add(javaProject);
							}
						}
					} catch (Exception e) {
						// ignore
					}
				}
			}
		}
	}
}