/**
 * Copyright 2010, 2011 Jingjing Li.
 *
 * This file is part of jplot2d.
 *
 * jplot2d is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 *
 * jplot2d 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 Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with jplot2d. If not, see .
 */
package org.jplot2d.interaction;

import java.io.IOException;
import java.io.StringReader;
import java.io.StringWriter;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;

/**
 * A mouse preference can load from / save to a properties string
 * 
 * @author Jingjing Li
 * 
 */
public class StringMousePreference implements MousePreference {

	protected final InteractionManager _imanager;

	private Integer _clickThreshold;

	private final Map> _bindingMap;

	public StringMousePreference(InteractionManager imanager) {
		_imanager = imanager;

		_bindingMap = new LinkedHashMap>();

		// initialize the binding map
		InteractionMode modes[] = imanager.getModes();
		for (InteractionMode mode : modes) {
			Map behaviorMap = new LinkedHashMap();
			_bindingMap.put(mode, behaviorMap);
			for (MouseBehavior behavior : mode.getAvailableMouseBehaviors()) {
				behaviorMap.put(behavior, null);
			}
		}
	}

	/**
	 * Loads the mouse binding preference from the given binding String.
	 */
	public void loadBindingPreference(String bindingStr) {
		if (bindingStr == null) {
			return;
		}
		// build binding map
		Properties prop = new Properties();
		try {
			prop.load(new StringReader(bindingStr));
		} catch (IOException e) {
			e.printStackTrace();
			return;
		}

		// initialize the binding map
		InteractionMode modes[] = _imanager.getModes();
		for (InteractionMode mode : modes) {
			Map behaviorMap = _bindingMap.get(mode);
			for (MouseBehavior behavior : mode.getAvailableMouseBehaviors()) {
				String bkey = mode.getName() + "." + behavior.getName();
				String bstr = (String) prop.get(bkey);
				if (bstr == null || bstr.length() == 0) {
					behaviorMap.put(behavior, new MouseButtonCombinationEnablity(null, false));
				} else {
					MouseButtonCombinationEnablity mbce = MouseButtonCombinationEnablity
							.valueOf(bstr);
					behaviorMap.put(behavior, mbce);
				}
			}
		}
	}

	/**
	 * Encode the BindingPreference into a string.
	 * 
	 * @return
	 */
	public static String encodeBindingPreference(MousePreference prefs) {

		Properties prop = new Properties();
		for (InteractionMode mode : prefs.getModes()) {
			for (MouseBehavior behavior : prefs.getBehaviorsInMode(mode)) {
				MouseButtonCombinationEnablity mbce = prefs.getMouseButtonCombinationEnablity(mode,
						behavior);
				if (mbce != null) {
					String key = mode.getName() + "." + behavior.getName();
					prop.put(key, mbce.toString());
				}
			}
		}

		StringWriter writer = new StringWriter();
		try {
			prop.store(writer, null);
		} catch (IOException e) {
			e.printStackTrace();
		}

		return writer.toString();
	}

	public Integer getClickThreshold() {
		return _clickThreshold;
	}

	public void setClickThreshold(Integer threshold) {
		_clickThreshold = threshold;
	}

	public InteractionMode[] getModes() {
		return _bindingMap.keySet().toArray(new InteractionMode[0]);
	}

	public MouseBehavior[] getBehaviorsInMode(InteractionMode mode) {
		Map mapinmode = _bindingMap.get(mode);
		return mapinmode.keySet().toArray(new MouseBehavior[0]);
	}

	public MouseButtonCombinationEnablity getMouseButtonCombinationEnablity(InteractionMode mode,
			MouseBehavior behavior) {
		Map mapinmode = _bindingMap.get(mode);
		return mapinmode.get(behavior);
	}

}