/*
 * Copyright 2007 the original author or authors.
 * 
 * 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.wamblee.system.core;

import javax.sql.DataSource;

import org.wamblee.system.core.AbstractComponent;
import org.wamblee.system.core.DefaultProvidedInterface;
import org.wamblee.system.core.ProvidedInterface;
import org.wamblee.system.core.RequiredInterface;
import org.wamblee.test.EventTracker;

public class Environment extends AbstractComponent<Object> {

	private static final ProvidedInterface[] provided(String aPrefix) {
		return new ProvidedInterface[] {
				new DefaultProvidedInterface(aPrefix + "datasource", String.class),
				new DefaultProvidedInterface(aPrefix + "integer", Integer.class) };
	}
	
	private static int COUNT = 0; 

	private EventTracker<String> _tracker;
	private double _random;
	private int _integer; 

	public Environment() {
		this("environment");
	}
	
	public Environment(String aName) {
       this(aName, "");
    }
	
	public Environment(String aName, String aPrefix) {
        super(aName, provided(aPrefix), new RequiredInterface[0]);
        _random = Math.random();
        _integer = COUNT++;
    }



	public Environment(EventTracker aTracker) {
		this();
		_tracker = aTracker;
	}

	public Integer getInteger() {
		return _integer;
	}

	public String getString() {
		return getName() + ".hello";
	}

	@Override
	protected Object doStart(Scope aScope) {
		addInterface(getProvidedInterfaces().get(0), getString(), aScope);
		addInterface(getProvidedInterfaces().get(1), getInteger(), aScope);
		track("start." + getName());
		return _random;
	}

	@Override
	protected void doStop(Object aRuntime) {
		track("stop." + getName());
		if (_random != (Double) aRuntime) {
			throw new IllegalArgumentException("Wrong runtime: expected "
					+ _random + " but got " + aRuntime);
		}
	}

	private void track(String aString) {
		if (_tracker == null) {
			return;
		}
		_tracker.eventOccurred(aString);
	}
}