/*******************************************************************************
 * Copyright (c) 2004, 2010 QNX Software Systems 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:
 *     QNX Software Systems - initial API and implementation
 *******************************************************************************/
package org.eclipse.cdt.make.internal.core.scannerconfig;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

import org.eclipse.cdt.core.model.CoreModel;
import org.eclipse.cdt.core.model.IPathEntry;
import org.eclipse.cdt.core.model.IPathEntryContainer;
import org.eclipse.cdt.make.core.MakeCorePlugin;
import org.eclipse.cdt.make.core.scannerconfig.IDiscoveredPathManager.IDiscoveredPathInfo;
import org.eclipse.cdt.make.internal.core.MakeMessages;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;

public class DiscoveredPathContainer implements IPathEntryContainer {
    public static final IPath CONTAINER_ID = new Path("org.eclipse.cdt.make.core.DISCOVERED_SCANNER_INFO"); //$NON-NLS-1$

    protected final IProject fProject;
    private IPathEntry[] fPathEntries;

    public DiscoveredPathContainer(IProject project) {
        fProject = project;
        fPathEntries = null;
    }
    
//    public IPathEntry[] getPathEntries() {
//        IPathEntry[] fPathEntries;
//        try {
//            fPathEntries = getPathEntries(getPathEntryMap());
//        } catch (CoreException e) {
//            MakeCorePlugin.log(e);
//            return new IPathEntry[0];
//        }
//        return fPathEntries;
//    }

    public String getDescription() {
        return MakeMessages.getString("DiscoveredContainer.description"); //$NON-NLS-1$
    }

    public IPath getPath() {
        return CONTAINER_ID;
    }

    public IPathEntry[] getPathEntries() {
        if (fPathEntries == null) {
            try {
                fPathEntries = computeNewPathEntries();
            }
            catch (CoreException e) {
                MakeCorePlugin.log(e);
                return new IPathEntry[0];
            }
        }
        return fPathEntries;
    }

    private IPathEntry[] computeNewPathEntries() throws CoreException {
        IDiscoveredPathInfo info = MakeCorePlugin.getDefault().getDiscoveryManager().getDiscoveredInfo(fProject);
        IPath[] includes = info.getIncludePaths();
        Map<String, String> syms = info.getSymbols();
        List<IPathEntry> entries = new ArrayList<IPathEntry>(includes.length + syms.size());
        for (IPath inc : includes) {
            entries.add(CoreModel.newIncludeEntry(Path.EMPTY, Path.EMPTY, inc, true));
        }
        Set<Entry<String, String>> entrySet = syms.entrySet();
        for (Entry<String, String> entry : entrySet) {
            entries.add(CoreModel.newMacroEntry(Path.EMPTY, entry.getKey(), entry.getValue()));
        }
        return entries.toArray(new IPathEntry[entries.size()]);
    }

}