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/**
Copyright 2013 project Ardulink http://www.ardulink.org/

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

 */
package org.ardulink.mqtt.compactors;

import static org.ardulink.core.Pin.analogPin;
import static org.ardulink.util.Integers.average;

import java.util.List;
import java.util.Map.Entry;

import org.ardulink.util.ListMultiMap;

import org.ardulink.core.Pin.AnalogPin;
import org.ardulink.core.events.AnalogPinValueChangedEvent;
import org.ardulink.core.events.EventListener;

/**
 * [ardulinktitle] [ardulinkversion]
 * 
 * project Ardulink http://www.ardulink.org/
 * 
 * [adsense]
 *
 */
public class TimeSliceCompactorAvg extends
		SlicedAnalogReadChangeListenerAdapter {

	private boolean firstCall = true;
	private final ListMultiMap data = new ListMultiMap();

	public TimeSliceCompactorAvg(EventListener active) {
		super(active);
	}

	@Override
	public void stateChanged(AnalogPinValueChangedEvent event) {
		if (this.firstCall) {
			getDelegate().stateChanged(event);
			this.firstCall = false;
		} else {
			synchronized (this.data) {
				this.data.put(event.getPin().pinNum(), event.getValue());
			}
		}
	}

	@Override
	public void ticked() {
		synchronized (this.data) {
			if (!data.isEmpty()) {
				for (final Entry> entry : data.asMap()
						.entrySet()) {
					getDelegate().stateChanged(
							new AnalogPinValueChangedEvent() {
								@Override
								public Integer getValue() {
									return Integer.valueOf(average(entry
											.getValue()));
								}

								@Override
								public AnalogPin getPin() {
									return analogPin(entry.getKey());
								}
							});
				}
				data.clear();
			}
		}
	}

}