/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 scatours.travelcatalog;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

import org.osoa.sca.ComponentContext;
import org.osoa.sca.RequestContext;
import org.osoa.sca.ServiceReference;
import org.osoa.sca.annotations.Context;
import org.osoa.sca.annotations.Property;
import org.osoa.sca.annotations.Reference;
import org.osoa.sca.annotations.Scope;
import org.osoa.sca.annotations.Service;

import scatours.common.Search;
import scatours.common.SearchCallback;
import scatours.common.TripItem;
import scatours.common.TripLeg;
import scatours.currencyconverter.CurrencyConverter;

/**
 * An implementation of the Trip service
 */
@Scope("COMPOSITE")
@Service(interfaces={TravelCatalogSearch.class})
public class TravelCatalogImpl implements TravelCatalogSearch, SearchCallback{
    
    @Reference 
    protected Search hotelSearch;
    
    @Reference 
    protected Search flightSearch;
    
    @Reference 
    protected Search carSearch;
    
    @Reference 
    protected Search tripSearch;    
           
    @Property
    public String quoteCurrencyCode = "USD";
    
    @Reference
    protected CurrencyConverter currencyConverter;    
    
    @Context
    protected ComponentContext componentContext;
    
    private int responsesReceived = 0;
    
    private List<TripItem> searchResults = new ArrayList<TripItem>();
    
    // TravelSearch methods
    
    public TripItem[] search(TripLeg tripLeg) {
        
        searchResults.clear();
        responsesReceived = 0;
        
        ServiceReference<Search> dynamicHotelSearch = 
            componentContext.getServiceReference(Search.class, "hotelSearch");
        
        dynamicHotelSearch.setCallbackID("HotelSearchCallbackID-" + tripLeg.getId());        
        dynamicHotelSearch.getService().searchAsynch(tripLeg);
        
        flightSearch.searchAsynch(tripLeg);
        carSearch.searchAsynch(tripLeg);
        tripSearch.searchAsynch(tripLeg);
        
        while (responsesReceived < 4){
            try {
                synchronized (this) {
                    this.wait();
                }
            } catch (InterruptedException ex){
                // do nothing
            }
        }
        
        for (TripItem tripItem : searchResults){
            tripItem.setId(UUID.randomUUID().toString());
            tripItem.setTripId(tripLeg.getId());
            tripItem.setPrice(currencyConverter.convert(tripItem.getCurrency(), 
                                                        quoteCurrencyCode, 
                                                        tripItem.getPrice()));
            tripItem.setCurrency(quoteCurrencyCode);
        }
        
        return searchResults.toArray(new TripItem[searchResults.size()]);
    }
    
    // SearchCallback methods
    
    public void searchResults(TripItem[] items){
        RequestContext requestContext = componentContext.getRequestContext();
        Object callbackID = requestContext.getServiceReference().getCallbackID();
        System.out.println(callbackID);
        
        if (items != null) {
            for(int i = 0; i < items.length; i++ ){
                searchResults.add(items[i]);
            }
        }
        
        responsesReceived++;
        try {
            synchronized (this) {
                this.notifyAll();
            }
        } catch (Exception ex) {
        }
    }    
}