/*******************************************************************************
 * This file is part of logisim-evolution.
 *
 *   logisim-evolution is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   logisim-evolution is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with logisim-evolution.  If not, see <http://www.gnu.org/licenses/>.
 *
 *   Original code by Carl Burch (http://www.cburch.com), 2011.
 *   Subsequent modifications by :
 *     + Haute École Spécialisée Bernoise
 *       http://www.bfh.ch
 *     + Haute École du paysage, d'ingénierie et d'architecture de Genève
 *       http://hepia.hesge.ch/
 *     + Haute École d'Ingénierie et de Gestion du Canton de Vaud
 *       http://www.heig-vd.ch/
 *   The project is currently maintained by :
 *     + REDS Institute - HEIG-VD
 *       Yverdon-les-Bains, Switzerland
 *       http://reds.heig-vd.ch
 *******************************************************************************/

package com.cburch.logisim.gui.menu;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;

import javax.swing.JFrame;

import com.cburch.logisim.Main;
import com.cburch.logisim.analyze.gui.AnalyzerManager;
import com.cburch.logisim.file.LibraryEvent;
import com.cburch.logisim.file.LibraryListener;
import com.cburch.logisim.gui.prefs.PreferencesFrame;
import com.cburch.logisim.proj.Project;
import com.cburch.logisim.proj.ProjectEvent;
import com.cburch.logisim.proj.ProjectListener;
import com.cburch.logisim.proj.Projects;
import com.cburch.logisim.util.WindowMenuItemManager;

public class WindowManagers {
	private static class MyListener implements PropertyChangeListener {
		public void propertyChange(PropertyChangeEvent event) {
			computeListeners();
		}
	}

	private static class ProjectManager extends WindowMenuItemManager implements
			ProjectListener, LibraryListener {
		private Project proj;

		ProjectManager(Project proj) {
			super(proj.getLogisimFile().getName(), false);
			this.proj = proj;
			proj.addProjectListener(this);
			proj.addLibraryListener(this);
			frameOpened(proj.getFrame());
		}

		@Override
		public JFrame getJFrame(boolean create) {
			return proj.getFrame();
		}

		public void libraryChanged(LibraryEvent event) {
			if (event.getAction() == LibraryEvent.SET_NAME) {
				setText((String) event.getData());
			}
		}

		public void projectChanged(ProjectEvent event) {
			if (event.getAction() == ProjectEvent.ACTION_SET_FILE) {
				setText(proj.getLogisimFile().getName());
			}
		}
	}

	private static void computeListeners() {
		List<Project> nowOpen = Projects.getOpenProjects();

		HashSet<Project> closed = new HashSet<Project>(projectMap.keySet());
		closed.removeAll(nowOpen);
		for (Project proj : closed) {
			ProjectManager manager = projectMap.get(proj);
			manager.frameClosed(manager.getJFrame(false));
			projectMap.remove(proj);
		}

		HashSet<Project> opened = new LinkedHashSet<Project>(nowOpen);
		opened.removeAll(projectMap.keySet());
		for (Project proj : opened) {
			ProjectManager manager = new ProjectManager(proj);
			projectMap.put(proj, manager);
		}
	}

	public static void initialize() {
		if (!initialized) {
			initialized = true;
			if (Main.ANALYZE)
				AnalyzerManager.initialize();
			PreferencesFrame.initializeManager();
			Projects.addPropertyChangeListener(Projects.projectListProperty,
					myListener);
			computeListeners();
		}
	}

	private static boolean initialized = false;

	private static MyListener myListener = new MyListener();

	private static HashMap<Project, ProjectManager> projectMap = new LinkedHashMap<Project, ProjectManager>();

	private WindowManagers() {
	}
}