/*
 * Copyright 2012-2015 Red Hat, Inc.
 *
 * This file is part of Thermostat.
 *
 * Thermostat 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 2, or (at your
 * option) any later version.
 *
 * Thermostat 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 Thermostat; see the file COPYING.  If not see
 * <http://www.gnu.org/licenses/>.
 *
 * Linking this code with other modules is making a combined work
 * based on this code.  Thus, the terms and conditions of the GNU
 * General Public License cover the whole combination.
 *
 * As a special exception, the copyright holders of this code give
 * you permission to link this code with independent modules to
 * produce an executable, regardless of the license terms of these
 * independent modules, and to copy and distribute the resulting
 * executable under terms of your choice, provided that you also
 * meet, for each linked independent module, the terms and conditions
 * of the license of that module.  An independent module is a module
 * which is not derived from or based on this code.  If you modify
 * this code, you may extend this exception to your version of the
 * library, but you are not obligated to do so.  If you do not wish
 * to do so, delete this exception statement from your version.
 */

package com.redhat.thermostat.client.swing.components.experimental;

import java.util.EventListener;
import java.util.concurrent.TimeUnit;

import javax.swing.event.EventListenerList;

public class TimelineIntervalSelectorModel {

    public static interface ChangeListener extends EventListener {
        public void changed();
    }

    private final EventListenerList listeners = new EventListenerList();

    private final long CREATION_TIME = System.currentTimeMillis();

    private long totalMinimum = CREATION_TIME;
    private long totalMaximum = CREATION_TIME + TimeUnit.HOURS.toMillis(1);

    private long selectedMinimum = CREATION_TIME;
    private long selectedMaximum = CREATION_TIME + TimeUnit.MINUTES.toMillis(10);

    public long getTotalMinimum() {
        return totalMinimum;
    }

    public void setTotalMinimum(long totalMinimum) {
        setTotalMinimum(totalMinimum, true);
    }
    public void setTotalMinimum(long totalMinimum, boolean notify) {
        if (this.totalMinimum != totalMinimum) {
            this.totalMinimum = totalMinimum;

            if (this.totalMaximum < this.totalMinimum) {
                this.totalMaximum = this.totalMinimum;
            }

            if (this.selectedMaximum < this.totalMinimum){
                this.selectedMaximum = this.totalMinimum;
            }

            if (this.selectedMinimum < this.totalMinimum) {
                this.selectedMinimum = this.totalMinimum;
            }

            if (notify) {
                fireModelChanged();
            }
        }
    }

    public long getTotalMaximum() {
        return totalMaximum;
    }

    public void setTotalMaximum(long totalMaximum) {
        setTotalMaximum(totalMaximum, true);
    }

    public void setTotalMaximum(long totalMaximum, boolean notify) {
        if (this.totalMaximum != totalMaximum) {
            this.totalMaximum = totalMaximum;

            if (this.totalMinimum > this.totalMaximum) {
                this.totalMinimum = this.totalMaximum;
            }

            if (this.selectedMaximum > this.totalMaximum) {
                this.selectedMaximum = this.totalMaximum;
            }

            if (this.selectedMinimum > this.totalMaximum) {
                this.selectedMinimum = this.totalMaximum;
            }

            if (notify) {
                fireModelChanged();
            }
        }
    }

    public long getSelectedMinimum() {
        return selectedMinimum;
    }

    public void setSelectedMinimum(long selectedMinimum) {
        setSelectedMinimum(selectedMinimum, true);
    }

    public void setSelectedMinimum(long selectedMinimum, boolean notify) {
        if(this.selectedMinimum != selectedMinimum) {
            this.selectedMinimum = selectedMinimum;
            if (notify) {
                fireModelChanged();
            }
        }
    }

    public long getSelectedMaximum() {
        return selectedMaximum;
    }

    public void setSelectedMaximum(long selectedMaximum) {
        setSelectedMaximum(selectedMaximum, true);
    }

    public void setSelectedMaximum(long selectedMaximum, boolean notify) {
        if (this.selectedMaximum != selectedMaximum) {
            this.selectedMaximum = selectedMaximum;
            if (notify) {
                fireModelChanged();
            }
        }
    }

    public void addChangeListener(ChangeListener l) {
        listeners.add(ChangeListener.class, l);
    }

    public void removeChangeListener(ChangeListener l) {
        listeners.remove(ChangeListener.class, l);
    }

    private void fireModelChanged() {
        Object[] listeners = this.listeners.getListenerList();

        for (int i = listeners.length - 2; i >= 0; i -= 2) {
            if (listeners[i] == ChangeListener.class) {
                ((ChangeListener) listeners[i + 1]).changed();
            }
        }
    }

}