/*
 * 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 org.apache.tuscany.sca.binding.comet.runtime;

import org.apache.tuscany.sca.assembly.ComponentService;
import org.apache.tuscany.sca.host.http.ServletHost;
import org.apache.tuscany.sca.interfacedef.Interface;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.provider.ServiceBindingProvider;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
import org.atmosphere.cpr.AtmosphereServlet;

public class CometServiceBindingProvider implements ServiceBindingProvider {

    private static final String PACKAGE_KEY = "com.sun.jersey.config.property.packages";
    private static final String PACKAGE_VALUE = "org.apache.tuscany.sca.binding.comet.runtime";

    private RuntimeEndpoint endpoint;
    private ServletHost servletHost;

    public CometServiceBindingProvider(RuntimeEndpoint endpoint, ServletHost servletHost) {
        this.endpoint = endpoint;
        this.servletHost = servletHost;
    }

    public void start() {
        ComponentService service = endpoint.getService();
        Interface serviceInterface = service.getInterfaceContract().getInterface();
        for (Operation op : serviceInterface.getOperations()) {
            String path = endpoint.getBinding().getURI() + "/" + op.getName() + "/*";
            AtmosphereServlet servlet = new AtmosphereServlet();
            servlet.addInitParameter(PACKAGE_KEY, PACKAGE_VALUE);
            servletHost.addServletMapping(path, servlet);
            servlet.getServletContext().setAttribute(CometBindingHandler.ENDPOINT_KEY, endpoint);
            servlet.getServletContext().setAttribute(CometBindingHandler.OPERATION_KEY, op);
        }
    }

    public void stop() {
        ComponentService service = endpoint.getService();
        Interface serviceInterface = service.getInterfaceContract().getInterface();
        for (Operation op : serviceInterface.getOperations()) {
            String path = endpoint.getBinding().getURI() + "/" + op.getName();
            servletHost.removeServletMapping(path);
        }
    }

    public InterfaceContract getBindingInterfaceContract() {
        return null;
    }

    public boolean supportsOneWayInvocation() {
        return true;
    }

}