/*
 * 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.sling.distribution.trigger.impl;

import javax.annotation.Nonnull;
import java.util.Map;

import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.ConfigurationPolicy;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Property;
import org.apache.felix.scr.annotations.Reference;
import org.apache.felix.scr.annotations.Service;
import org.apache.sling.api.resource.ResourceResolverFactory;
import org.apache.sling.commons.osgi.PropertiesUtil;
import org.apache.sling.commons.scheduler.Scheduler;
import org.apache.sling.distribution.DistributionRequestType;
import org.apache.sling.distribution.component.impl.DistributionComponentConstants;
import org.apache.sling.distribution.common.DistributionException;
import org.apache.sling.distribution.component.impl.SettingsUtils;
import org.apache.sling.distribution.trigger.DistributionRequestHandler;
import org.apache.sling.distribution.trigger.DistributionTrigger;
import org.osgi.framework.BundleContext;

@Component(metatype = true,
        label = "Apache Sling Distribution Trigger - Scheduled Triggers Factory",
        configurationFactory = true,
        specVersion = "1.1",
        policy = ConfigurationPolicy.REQUIRE,
        description = "Triggers a distribution request of the given type (action) " +
                "for the given path (path) at a periodical time interval (seconds)."
)
@Service(DistributionTrigger.class)
@Property(name="webconsole.configurationFactory.nameHint", value="Trigger name: {name}")
public class ScheduledDistributionTriggerFactory implements DistributionTrigger {


    @Property(label = "Name", description = "The name of the trigger.")
    public static final String NAME = DistributionComponentConstants.PN_NAME;

    /**
     * scheduled trigger action property
     */
    @Property(label = "Distribution Type", description = "The type of the distribution request produced by this trigger in ('ADD', 'DELETE', 'PULL', 'TEST'). Default 'PULL'.")
    private static final String ACTION = "action";

    /**
     * scheduled trigger path property
     */
    @Property(label = "Distributed Path", description = "The path to be distributed periodically.")
    private static final String PATH = "path";

    /**
     * scheduled trigger seconds property
     */
    @Property(label = "Interval in Seconds", description = "The number of seconds between distribution requests. Default 30 seconds.")
    private static final String SECONDS = "seconds";

    @Property(label = "Service Name", description = "The name of the service used to trigger the distribution requests.")
    private static final String SERVICE_NAME = "serviceName";

    private ScheduledDistributionTrigger trigger;

    @Reference
    private ResourceResolverFactory resolverFactory;

    @Reference
    private Scheduler scheduler;


    @Activate
    public void activate(BundleContext bundleContext, Map<String, Object> config) {
        String action = PropertiesUtil.toString(config.get(ACTION), DistributionRequestType.PULL.name());
        String path = PropertiesUtil.toString(config.get(PATH), null);
        int interval = PropertiesUtil.toInteger(config.get(SECONDS), 30);
        String serviceName = SettingsUtils.removeEmptyEntry(PropertiesUtil.toString(config.get(SERVICE_NAME), null));

        trigger = new ScheduledDistributionTrigger(action, path, interval, serviceName, scheduler, resolverFactory);
    }

    @Deactivate
    public void deactivate() {
        trigger.disable();
    }

    public void register(@Nonnull DistributionRequestHandler requestHandler) throws DistributionException {
        trigger.register(requestHandler);
    }

    public void unregister(@Nonnull DistributionRequestHandler requestHandler) throws DistributionException {
        trigger.unregister(requestHandler);
    }
}