/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of the License "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

package com.nokia.carbide.cpp.internal.pi.wizards.ui.util;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import org.eclipse.core.resources.IProject;

import org.eclipse.core.resources.IWorkspaceRoot;

import org.eclipse.core.resources.ResourcesPlugin;

import org.eclipse.core.runtime.CoreException;

import org.eclipse.jface.viewers.ITreeContentProvider;

import org.eclipse.jface.viewers.Viewer;

import org.eclipse.ui.IViewSite;

import org.eclipse.ui.model.WorkbenchContentProvider;

import com.nokia.carbide.cdt.builder.CarbideBuilderPlugin;

import com.nokia.carbide.cdt.builder.project.ICarbideBuildConfiguration;

import com.nokia.carbide.cdt.builder.project.ICarbideProjectInfo;

public class PkgListTreeContentProvider implements ITreeContentProvider {

	PkgListTree tree;

	// need to work around CarbideBuildConfiguration equal() that claims

	// configuration objects are equal even when their projects are different

	Map<IProject, ArrayList<Object>> configMap = new HashMap<IProject, ArrayList<Object>>();

	WorkbenchContentProvider cp = new WorkbenchContentProvider();

	public PkgListTreeContentProvider(PkgListTree myTree) {

		tree = myTree;

	}

	public Object[] getChildren(Object parentElement) {

		if (parentElement instanceof IPkgEntry) {

			return null;

		} else if (parentElement instanceof IViewSite) {

			return getCarbideCppProjects();

		} else if (parentElement instanceof IWorkspaceRoot) {

			return getCarbideCppProjects();

		} else if (parentElement instanceof IProject) {

			return getConfigs((IProject)parentElement).toArray();

		} else if (parentElement instanceof PkgListTree) {

			return getElements(parentElement);

		}

		return null;

	}

	public Object getParent(Object element) {

		if (element instanceof ICarbideBuildConfiguration) {

			return ((ICarbideBuildConfiguration)element).getCarbideProject().getProject();

		}

		return cp.getParent(element);

	}

	public boolean hasChildren(Object element) {

		if (element instanceof IPkgEntry) {

			return false;

		}else if (element instanceof ICarbideBuildConfiguration) {

			return false;

		}else if (element instanceof IProject) {

			return true;

		}else if (element instanceof PkgListTree) {

			return true;

		}

		return cp.hasChildren(element);

	}

	public Object[] getElements(Object inputElement) {

		return tree.getRoot();

	}

	public void dispose() {

		cp.dispose();

	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

		configMap.clear();

		cp.inputChanged(viewer, oldInput, newInput);

	}

	private Object[] getCarbideCppProjects() {

		// lifted from com.nokia.carbide.cpp.project.ui.views.SPNViewContentProvider

		IProject[] projects = ResourcesPlugin.getWorkspace().getRoot().getProjects();

		List<IProject> list = new ArrayList<IProject>();

		for (int i = 0; i < projects.length; i++) {

			try {

				if (projects[i].isAccessible() && projects[i].hasNature(CarbideBuilderPlugin.CARBIDE_PROJECT_NATURE_ID)) {

					if (projects[i].isOpen()) {

						ICarbideProjectInfo cpi = CarbideBuilderPlugin.getBuildManager().getProjectInfo(projects[i]);

						if (cpi == null)

							continue; // must have valid Carbide project info

						List<ICarbideBuildConfiguration> bc = cpi.getBuildConfigurations();

						boolean haveConfigWithPKG = false;

						// if this project have all configs with (none) PKG, don't show the project

						for (ICarbideBuildConfiguration config : bc) {

							if (config.getSISBuilderInfoList().size() > 0) {

								haveConfigWithPKG = true;

								break;

							}

						}

						if (haveConfigWithPKG == false)

							continue;	// must have buildconfig with good PKG to show up

						list.add(projects[i]);

					}

				}

			} catch (CoreException e) {

				e.printStackTrace();

			}

		}

		return list.toArray();

	}

	private ArrayList<Object> getConfigs(IProject project) {

		ArrayList<Object> configs = configMap.get(project);

		if (configs == null) {

			configs = new ArrayList<Object>();

			configMap.put(project, configs);

			if (project.exists() == false || project.isOpen() == false)

				return configs;	// closed project do not have config

			ICarbideProjectInfo cpi = CarbideBuilderPlugin.getBuildManager().getProjectInfo(project);

			if (cpi == null)

				return configs;

			List<ICarbideBuildConfiguration> bc = cpi.getBuildConfigurations();

			if (bc.size() < 1)

				return configs;

			for (ICarbideBuildConfiguration config : bc) {

				// exclude configuration with (none) PKG

				if (config.getSISBuilderInfoList().size() > 0) {

					configs.add(config);

				}

			}

		}

		return configs;

	}

}