/*
 * 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.container;

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

public class Application extends AbstractComponent {
	public static RequiredInterface[] required(boolean aOptional, String aPrefix) {
		return
		new RequiredInterface[] { 
    			new DefaultRequiredInterface(aPrefix + "string", String.class, aOptional), 
    			new DefaultRequiredInterface(aPrefix + "integer", Integer.class, aOptional)
    	};
	}
	
	public static RequiredInterface[] required(boolean aOptional) {
        return required(aOptional, "");
    }
    

	private EventTracker<String> _tracker;
	private String _string; 
	private Integer _integer;
	private double _random; 
	
	public Application() {
	    this("application");
	}
	
	public Application(String aName) {
	    this(aName, "");
    }
	
	public Application(String aName, String aPrefix) {
        super(aName, new ProvidedInterface[0], required(false, aPrefix));
        _random = Math.random();
    }
	
	public Application(boolean aIsOptinal) { 
		super("application", new ProvidedInterface[0], required(true, "")); 
	}
	
	public Application(EventTracker<String> aTracker) { 
		this();
		_tracker = aTracker; 
	}

	@Override
	public Object doStart(Scope aScope) {
		track("start." + getName());
		_string = aScope.getInterfaceImplementation(getRequiredInterfaces().get(0).getProvider(), String.class);
	    _integer = aScope.getInterfaceImplementation(getRequiredInterfaces().get(1).getProvider(), Integer.class);
	    return _random; 
	}
	
	public String getString() {
		return _string;
	}
	
	public Integer getInteger() {
		return _integer;
	}
	
	@Override
	public 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);
	}
}