/*
 * 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.streampipes.connect.container.worker.management;

import org.apache.streampipes.connect.RunningAdapterInstances;
import org.apache.streampipes.connect.api.IAdapter;
import org.apache.streampipes.connect.api.exception.AdapterException;
import org.apache.streampipes.connect.container.worker.utils.AdapterUtils;
import org.apache.streampipes.model.connect.adapter.AdapterDescription;
import org.apache.streampipes.model.connect.adapter.AdapterSetDescription;
import org.apache.streampipes.model.connect.adapter.AdapterStreamDescription;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Collection;

public class AdapterWorkerManagement {

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

    public Collection<AdapterDescription> getAllRunningAdapterInstances() {
        return RunningAdapterInstances.INSTANCE.getAllRunningAdapterDescriptions();
    }

    public void invokeStreamAdapter(AdapterStreamDescription adapterStreamDescription) throws AdapterException {

       IAdapter<?> adapter = AdapterUtils.setAdapter(adapterStreamDescription);

        RunningAdapterInstances.INSTANCE.addAdapter(adapterStreamDescription.getElementId(), adapter, adapterStreamDescription);
        adapter.startAdapter();
    }

    public void stopStreamAdapter(AdapterStreamDescription adapterStreamDescription) throws AdapterException {
        stopAdapter(adapterStreamDescription);
    }

    public void invokeSetAdapter(AdapterSetDescription adapterSetDescription) throws AdapterException {

        IAdapter<?> adapter = AdapterUtils.setAdapter(adapterSetDescription);

        RunningAdapterInstances.INSTANCE.addAdapter(adapterSetDescription.getElementId(), adapter, adapterSetDescription);

        adapter.changeEventGrounding(adapterSetDescription.getDataSet().getEventGrounding().getTransportProtocol());

        // Start a thread to start a set adapter
        Runnable r = () -> {
            try {
                adapter.startAdapter();
            } catch (AdapterException e) {
                e.printStackTrace();
            }
        };

        new Thread(r).start();
    }

    public void stopSetAdapter(AdapterSetDescription adapterSetDescription) throws AdapterException {
        stopAdapter(adapterSetDescription);
    }

    private void stopAdapter(AdapterDescription adapterDescription) throws AdapterException {

        String elementId = adapterDescription.getElementId();

        IAdapter<?> adapter = RunningAdapterInstances.INSTANCE.removeAdapter(elementId);

        if (adapter == null) {
            throw new AdapterException("Adapter with id " + elementId + " was not found in this container and cannot be stopped.");
        }

        adapter.stopAdapter();
    }

}
