/*
 *  RapidMiner
 *
 *  Copyright (C) 2001-2011 by Rapid-I and the contributors
 *
 *  Complete list of developers available at our web site:
 *
 *       http://rapid-i.com
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Affero General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 Affero General Public License for more details.
 *
 *  You should have received a copy of the GNU Affero General Public License
 *  along with this program.  If not, see http://www.gnu.org/licenses/.
 */
package com.rapidminer.gui.properties;

import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;

import javax.swing.AbstractSpinnerModel;

import com.rapidminer.operator.Operator;
import com.rapidminer.operator.OperatorVersion;

/** Displays the {@link OperatorVersion}s as returned by {@link Operator#getIncompatibleVersionChanges()}.
 *  and {@link Operator#getCompatibilityLevel()}.
 * @author Simon Fischer
 *
 */
public class CompatibilityLevelSpinnerModel extends AbstractSpinnerModel {

	private int index = 0;
	private Operator operator;
	private List<OperatorVersion> versions = new LinkedList<OperatorVersion>();
	
	protected void setOperator(Operator operator) {
		this.operator = operator;		
		this.versions = new LinkedList<OperatorVersion>(Arrays.asList(operator.getIncompatibleVersionChanges()));
		OperatorVersion latest = OperatorVersion.getLatestVersion(operator.getOperatorDescription());
		if (!versions.contains(latest)) {
			versions.add(latest);
		}
//		this.index = versions.indexOf(operator.getCompatibilityLevel());
//		fireStateChanged();
		setValue(operator.getCompatibilityLevel());
	}
	
	@Override
	public Object getNextValue() {
		if (index + 1 >= versions.size()) {
			return null;
		} else {
			return versions.get(index + 1);
		}
	}

	@Override
	public Object getPreviousValue() {
		if (index <= 0) {
			return null;
		} else {
			return versions.get(index - 1);
		}
	}

	@Override
	public Object getValue() {
		if (operator != null) {
			return operator.getCompatibilityLevel();
		} else {
			return "-------";
		}
	}

	@Override
	public void setValue(Object value) {
		if (operator != null) {
			if (value instanceof String) {
				value = new OperatorVersion((String) value);
			}
			if (value == null) {
				value = OperatorVersion.getLatestVersion(operator.getOperatorDescription());
			}
			operator.setCompatibilityLevel((OperatorVersion) value);			
			index = versions.indexOf(value);
			if (index == -1) {
				versions.add((OperatorVersion) value);
				Collections.sort(versions);
				index = versions.indexOf(value);
			}
			fireStateChanged();
		}	
	}	
}