/*
 * Copyright 2010-2011 Ning, Inc.
 *
 * Ning 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 com.ning.billing.beatrix.lifecycle;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.testng.Assert;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

import com.google.inject.AbstractModule;
import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Stage;
import com.ning.billing.lifecycle.KillbillService;
import com.ning.billing.lifecycle.LifecycleHandlerType;
import com.ning.billing.lifecycle.LifecycleHandlerType.LifecycleLevel;


public class TestLifecycle {

    private static final Logger log = LoggerFactory.getLogger(TestLifecycle.class);

    private Service1 s1;
    private Service2 s2;

    private DefaultLifecycle lifecycle;

    public static class ServiceBase {

        private int count = 0;

        public ServiceBase() {
            reset();
        }

        public synchronized void reset() {
            this.count = 0;
        }

        public synchronized int getCount() {
            return count;
        }

        public synchronized void incrementCount() {
            count++;
        }
    }

    public static class Service1 extends ServiceBase implements KillbillService {

        @LifecycleHandlerType(LifecycleLevel.INIT_BUS)
        public void initBus() {
            log.info("Service1 : got INIT_BUS");
            incrementCount();
        }

        @LifecycleHandlerType(LifecycleLevel.START_SERVICE)
        public void startService() {
            log.info("Service1 : got START_SERVICE");
            incrementCount();
        }

        @LifecycleHandlerType(LifecycleLevel.SHUTDOWN)
        public void shutdownService() {
            log.info("Service1 : got SHUTDOWN");
            incrementCount();
        }

        @Override
        public String getName() {
            return null;
        }
    }

    public static class Service2 extends ServiceBase implements KillbillService {

        @LifecycleHandlerType(LifecycleLevel.LOAD_CATALOG)
        public void loadCatalog() {
            log.info("Service2 : got LOAD_CATALOG");
            incrementCount();
        }

        @LifecycleHandlerType(LifecycleLevel.REGISTER_EVENTS)
        public void registerEvents() {
            log.info("Service2 : got REGISTER_EVENTS");
            incrementCount();
        }

        @LifecycleHandlerType(LifecycleLevel.UNREGISTER_EVENTS)
        public void unregisterEvents() {
            log.info("Service2 : got UNREGISTER_EVENTS");
            incrementCount();
        }

        @LifecycleHandlerType(LifecycleLevel.START_SERVICE)
        public void startService() {
            log.info("Service2 : got START_SERVICE");
            incrementCount();
        }

        @Override
        public String getName() {
            return null;
        }
    }


    @BeforeClass(alwaysRun = true)
    public void setup() {
        final Injector g = Guice.createInjector(Stage.DEVELOPMENT, new TestLifecycleModule());
        s1 = g.getInstance(Service1.class);
        s2 = g.getInstance(Service2.class);
        lifecycle = g.getInstance(DefaultLifecycle.class);
    }

    @Test(enabled = true, groups = {"fast"})
    public void testLifecycle() {
        s1.reset();
        s2.reset();
        lifecycle.fireStartupSequencePriorEventRegistration();
        Assert.assertEquals(s1.getCount() + s2.getCount(), 3);

        s1.reset();
        s2.reset();
        lifecycle.fireStartupSequencePostEventRegistration();
        Assert.assertEquals(s1.getCount() + s2.getCount(), 2);

        s1.reset();
        s2.reset();
        lifecycle.fireShutdownSequencePriorEventUnRegistration();
        Assert.assertEquals(s1.getCount() + s2.getCount(), 1);

        s1.reset();
        s2.reset();
        lifecycle.fireShutdownSequencePostEventUnRegistration();
        Assert.assertEquals(s1.getCount() + s2.getCount(), 1);
    }

    public static class LifecycleNoWarn extends DefaultLifecycle {

        @Inject
        public LifecycleNoWarn(final Injector injector) {
            super(injector);
        }

        @Override
        protected void logWarn(final String msg, final Exception e) {
        }
    }

    public static class TestLifecycleModule extends AbstractModule {

        @Override
        protected void configure() {
            bind(DefaultLifecycle.class).to(LifecycleNoWarn.class).asEagerSingleton();
            bind(Service1.class).asEagerSingleton();
            bind(Service2.class).asEagerSingleton();
        }

    }
}

