/**
 * Copyright (c) 2010-2022 Contributors to the openHAB project
 *
 * See the NOTICE file(s) distributed with this work for additional
 * information.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0
 *
 * SPDX-License-Identifier: EPL-2.0
 */
package org.openhab.binding.generacmobilelink.internal.factory;

import static org.openhab.binding.generacmobilelink.internal.GeneracMobileLinkBindingConstants.*;

import java.util.Hashtable;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import org.eclipse.jdt.annotation.NonNullByDefault;
import org.eclipse.jdt.annotation.Nullable;
import org.eclipse.jetty.client.HttpClient;
import org.openhab.binding.generacmobilelink.internal.discovery.GeneracMobileLinkDiscoveryService;
import org.openhab.binding.generacmobilelink.internal.handler.GeneracMobileLinkAccountHandler;
import org.openhab.binding.generacmobilelink.internal.handler.GeneracMobileLinkGeneratorHandler;
import org.openhab.core.config.discovery.DiscoveryService;
import org.openhab.core.io.net.http.HttpClientFactory;
import org.openhab.core.thing.Bridge;
import org.openhab.core.thing.Thing;
import org.openhab.core.thing.ThingTypeUID;
import org.openhab.core.thing.ThingUID;
import org.openhab.core.thing.binding.BaseThingHandlerFactory;
import org.openhab.core.thing.binding.ThingHandler;
import org.openhab.core.thing.binding.ThingHandlerFactory;
import org.osgi.framework.ServiceRegistration;
import org.osgi.service.component.annotations.Activate;
import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

/**
 * The {@link GeneracMobileLinkHandlerFactory} is responsible for creating things and thing
 * handlers.
 *
 * @author Dan Cunningham - Initial contribution
 */
@NonNullByDefault
@Component(configurationPid = "binding.generacmobilelink", service = ThingHandlerFactory.class)
public class GeneracMobileLinkHandlerFactory extends BaseThingHandlerFactory {
    private static final Set<ThingTypeUID> SUPPORTED_THING_TYPES_UIDS = Set.of(THING_TYPE_ACCOUNT,
            THING_TYPE_GENERATOR);
    private final Map<ThingUID, ServiceRegistration<?>> discoveryServiceRegs = new ConcurrentHashMap<>();
    private final HttpClient httpClient;

    @Activate
    public GeneracMobileLinkHandlerFactory(final @Reference HttpClientFactory httpClientFactory) {
        this.httpClient = httpClientFactory.getCommonHttpClient();
    }

    @Override
    public boolean supportsThingType(ThingTypeUID thingTypeUID) {
        return SUPPORTED_THING_TYPES_UIDS.contains(thingTypeUID);
    }

    @Override
    protected @Nullable ThingHandler createHandler(Thing thing) {
        ThingTypeUID thingTypeUID = thing.getThingTypeUID();

        if (THING_TYPE_GENERATOR.equals(thingTypeUID)) {
            return new GeneracMobileLinkGeneratorHandler(thing);
        }

        if (THING_TYPE_ACCOUNT.equals(thingTypeUID)) {
            GeneracMobileLinkDiscoveryService discoveryService = new GeneracMobileLinkDiscoveryService();
            GeneracMobileLinkAccountHandler accountHandler = new GeneracMobileLinkAccountHandler((Bridge) thing,
                    httpClient, discoveryService);
            discoveryServiceRegs.put(accountHandler.getThing().getUID(), bundleContext
                    .registerService(DiscoveryService.class.getName(), discoveryService, new Hashtable<>()));
            return accountHandler;
        }

        return null;
    }

    @Override
    protected synchronized void removeHandler(ThingHandler thingHandler) {
        if (thingHandler instanceof GeneracMobileLinkAccountHandler) {
            ServiceRegistration<?> serviceReg = discoveryServiceRegs.remove(thingHandler.getThing().getUID());
            if (serviceReg != null) {
                serviceReg.unregister();
            }
        }
    }
}
