/*
 * 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;

/**
 * 
 * @author $author$
 * @version $Revision$
 */
public class Application extends AbstractComponent<Object> {
    private EventTracker<String> tracker;

    private String string;

    private Integer integer;

    private double random;

    /**
     * Creates a new Application object.
     */
    public Application() {
        this("application");
    }

    /**
     * Creates a new Application object.
     * 
     */
    public Application(String aName) {
        this(aName, "");
    }

    /**
     * Creates a new Application object.
     * 
     */
    public Application(String aName, String aPrefix) {
        super(aName, new ProvidedInterface[0], required(false, aPrefix));
        random = Math.random();
    }

    /**
     * Creates a new Application object.
     * 
     */
    public Application(boolean aIsOptinal) {
        super("application", new ProvidedInterface[0], required(true, ""));
    }

    /**
     * Creates a new Application object.
     * 
     */
    public Application(EventTracker<String> aTracker) {
        this();
        tracker = aTracker;
    }

    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, "");
    }

    @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);
    }
}