package com.nokia.cdt.debug.common.internal.source.lookup;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Iterator;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.core.runtime.Path;

import org.eclipse.debug.core.DebugPlugin;

import org.eclipse.debug.core.ILaunchConfiguration;

import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;

import org.eclipse.debug.core.ILaunchManager;

import org.eclipse.debug.core.model.ISourceLocator;

import org.eclipse.debug.core.sourcelookup.AbstractSourceLookupDirector;

import org.eclipse.debug.core.sourcelookup.ISourceContainer;

public class SourceMappingUtils {

	/** Name kept for legacy launch config settings purposes */

	private static final String EPOCROOT_SETTING = "com.nokia.cdt.debug.cw.symbian.Epoc_Root" ; //$NON-NLS-1$

	/**

	 * Add the source mapping for the workign copy of the launch config. Clients should ensure to call doSave() after this call.

	 * @param configuration

	 * @throws CoreException

	 */

	public static void addSourceMappingToLaunch(ILaunchConfigurationWorkingCopy configuration) throws CoreException {

		String memento = null;

		String type = null;

		memento = configuration.getAttribute(ILaunchConfiguration.ATTR_SOURCE_LOCATOR_MEMENTO, (String) null);

		type = configuration.getAttribute(ILaunchConfiguration.ATTR_SOURCE_LOCATOR_ID, (String) null);

		if (type == null) {

			type = configuration.getType().getSourceLocatorId();

		}

		ILaunchManager launchManager = DebugPlugin.getDefault().getLaunchManager();

		ISourceLocator locator = launchManager.newSourceLocator(type);

		if (locator instanceof AbstractSourceLookupDirector) {

			AbstractSourceLookupDirector director = (AbstractSourceLookupDirector) locator;

			if (memento == null) {

				director.initializeDefaults(configuration);

			} else {

				director.initializeFromMemento(memento, configuration);

			}

			addSourceMappingToDirector(director, configuration);

			configuration.setAttribute(ILaunchConfiguration.ATTR_SOURCE_LOCATOR_MEMENTO, director.getMemento());

			configuration.setAttribute(ILaunchConfiguration.ATTR_SOURCE_LOCATOR_ID, director.getId());

		}

	}

	private static void addSourceMappingToDirector(AbstractSourceLookupDirector director, ILaunchConfiguration configuration) throws CoreException {

		ArrayList containerList = new ArrayList(Arrays.asList(director.getSourceContainers()));

		boolean hasSymbianContainer = false;

		SymbianSourceContainer symbianContainer = null;

		for (Iterator iter = containerList.iterator(); iter.hasNext() && !hasSymbianContainer;) {

			ISourceContainer container = (ISourceContainer) iter.next();

			if (container instanceof SymbianSourceContainer)

			{

				hasSymbianContainer = true;

			}

		}

		if (!hasSymbianContainer) {

			String epocRootPath = configuration.getAttribute( EPOCROOT_SETTING, (String)null );

			if (epocRootPath != null)

			{

				symbianContainer = new SymbianSourceContainer(new Path(epocRootPath));

				symbianContainer.init(director);

				containerList.add(symbianContainer);

			}

		}

		director.setSourceContainers((ISourceContainer[]) containerList.toArray(new ISourceContainer[containerList.size()]));

	}

}