/*
 * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.controller.sal.binding.impl;

import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ConsumerContext;
import org.opendaylight.controller.sal.binding.api.BindingAwareService;
import org.opendaylight.yangtools.yang.binding.RpcService;
import org.osgi.framework.BundleContext;
import org.osgi.framework.InvalidSyntaxException;
import org.osgi.framework.ServiceReference;
import org.slf4j.LoggerFactory
import static org.opendaylight.controller.sal.binding.impl.osgi.Constants.*

class OsgiConsumerContext implements ConsumerContext {

    static val log = LoggerFactory.getLogger(OsgiConsumerContext)
    protected val BundleContext bundleContext;
    protected val BindingAwareBrokerImpl broker;

    new(BundleContext ctx, BindingAwareBrokerImpl broker) {
        this.bundleContext = ctx;
        this.broker = broker;
    }

    override def <T extends BindingAwareService> getSALService(Class<T> service) {

        // SAL Services are global
        var ref = bundleContext.getServiceReference(service);
        return bundleContext.getService(ref) as T;
    }

    override def <T extends RpcService> T getRpcService(Class<T> module) {
        try {

            val services = bundleContext.getServiceReferences(module, getProxyFilter());

            // Proxy service found / using first implementation
            // FIXME: Add advanced logic to retrieve service with right set of models
            if (false == services.empty) {
                val ref = services.iterator().next() as ServiceReference<T>;
                return bundleContext.getService(ref) as T;
            }
        } catch (InvalidSyntaxException e) {
            log.error("Created filter was invalid:", e.message, e)
        }
        return null;

    }

    private def getProxyFilter() {
        return '''(«SAL_SERVICE_TYPE»=«SAL_SERVICE_TYPE_CONSUMER_PROXY»)'''
    }
}