package bordcomputer;

import org.osgi.framework.BundleActivator;
import org.osgi.framework.BundleContext;
import org.osgi.framework.ServiceReference;

import es.us.isa.FAMA.Reasoner.QuestionTrader;
import es.us.isa.FAMA.Reasoner.questions.NumberOfProductsQuestion;
import es.us.isa.FAMA.Reasoner.questions.ValidQuestion;
import es.us.isa.FAMA.models.variabilityModel.VariabilityModel;

public class Activator implements BundleActivator {

    private static BundleContext context;
    private ServiceReference sr;

    static BundleContext getContext() {
        return context;
    }

    /*
     * (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#start(org.osgi.framework.BundleContext)
     */
    public void start(BundleContext bundleContext) throws Exception {
        String className = QuestionTrader.class.getCanonicalName();
        //attribute sr (ServiceReference) defined on the Activator
        sr = context.getServiceReference(className);
        QuestionTrader qt = (QuestionTrader) context.getService(sr);
        if (qt != null){
        System.out.println("FaMa load successful");
        //here you use FaMa as on Standalone version
        consumeFaMa(qt);
        }
    }

    private void consumeFaMa(QuestionTrader qt) {
        //A feature model is loaded
        VariabilityModel fm = qt.openFile("fm-samples/HIS.fm");
        qt.setVariabilityModel(fm);
        //////// VALID QUESTION + NUMBER PRODUCTS QUESTION /////////
        ValidQuestion vq = (ValidQuestion) qt.createQuestion("Valid");
        qt.ask(vq);
        if (vq.isValid()) {
        NumberOfProductsQuestion npq = (NumberOfProductsQuestion)
        qt.createQuestion("#Products");
        qt.ask(npq);
        System.out.println("The number of products is: "+
        npq.getNumberOfProducts());
        } else {
        System.out.println("Your feature model is not valid");
        }
    }

    /*
     * (non-Javadoc)
     * @see org.osgi.framework.BundleActivator#stop(org.osgi.framework.BundleContext)
     */
    public void stop(BundleContext bundleContext) throws Exception {
        if (sr != null){
            context.ungetService(sr);
            }
    }

}