/*
 * Copyright 2010-2013 Ning, Inc.
 * Copyright 2014 Groupon, Inc
 * Copyright 2014 The Billing Project, LLC
 *
 * The Billing Project 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.killbill.billing.server.listeners;

import javax.servlet.ServletContext;

import org.killbill.billing.jaxrs.resources.JaxRsResourceBase;
import org.killbill.billing.jaxrs.util.KillbillEventHandler;
import org.killbill.billing.platform.api.KillbillConfigSource;
import org.killbill.billing.platform.config.DefaultKillbillConfigSource;
import org.killbill.billing.server.modules.KillbillServerModule;
import org.killbill.billing.server.profiling.ProfilingFilter;
import org.killbill.billing.server.security.TenantFilter;
import org.killbill.bus.api.PersistentBus;
import org.killbill.commons.skeleton.modules.BaseServerModuleBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.collect.ImmutableMap;
import com.google.inject.Module;
import com.google.inject.servlet.ServletModule;

public class KillbillGuiceListener extends KillbillPlatformGuiceListener {

    private static final Logger logger = LoggerFactory.getLogger(KillbillGuiceListener.class);

    private KillbillEventHandler killbilleventHandler;

    @Override
    protected ServletModule getServletModule() {
        // Don't filter all requests through Jersey, only the JAX-RS APIs (otherwise,
        // things like static resources, favicon, etc. are 404'ed)
        final BaseServerModuleBuilder builder = new BaseServerModuleBuilder().setJaxrsUriPattern("(" + JaxRsResourceBase.PREFIX + "|" + JaxRsResourceBase.PLUGINS_PATH + ")" + "/.*")
                                                                             .addJaxrsResource("org.killbill.billing.jaxrs.mappers")
                                                                             .addJaxrsResource("org.killbill.billing.jaxrs.resources");
        // Add profiling filter first
        builder.addFilter("/*", ProfilingFilter.class);

        // Add TenantFilter right after is multi-tenancy has been configured.
        if (config.isMultiTenancyEnabled()) {
            builder.addFilter("/*", TenantFilter.class);
        }
        return builder.build();
    }


    @Override
    protected Module getModule(final ServletContext servletContext) {
        return new KillbillServerModule(servletContext, config, configSource);
    }

    @Override
    protected KillbillConfigSource getConfigSource() {
        final ImmutableMap<String, String> defaultProperties = ImmutableMap.<String, String>of("org.killbill.server.updateCheck.url",
                                                                                               "https://raw.github.com/killbill/killbill/master/profiles/killbill/src/main/resources/update-checker/killbill-server-update-list.properties");
        return new DefaultKillbillConfigSource(defaultProperties);
    }

    @Override
    protected void startLifecycleStage2() {
        killbilleventHandler = injector.getInstance(KillbillEventHandler.class);

        // Perform Bus registration
        try {
            killbillBusService.getBus().register(killbilleventHandler);
        } catch (final PersistentBus.EventBusException e) {
            logger.error("Failed to register for event notifications, this is bad exiting!", e);
            System.exit(1);
        }
    }

    @Override
    protected void stopLifecycleStage2() {
        try {
            killbillBusService.getBus().unregister(killbilleventHandler);
        } catch (final PersistentBus.EventBusException e) {
            logger.warn("Failed to unregister for event notifications", e);
        }
    }
}
