/*
 * 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.sinks.brokers.jvm.websocket;

import org.apache.streampipes.commons.exceptions.SpRuntimeException;
import org.apache.streampipes.model.DataSinkType;
import org.apache.streampipes.model.graph.DataSinkDescription;
import org.apache.streampipes.model.runtime.Event;
import org.apache.streampipes.sdk.builder.DataSinkBuilder;
import org.apache.streampipes.sdk.builder.StreamRequirementsBuilder;
import org.apache.streampipes.sdk.helpers.EpRequirements;
import org.apache.streampipes.sdk.helpers.Labels;
import org.apache.streampipes.sdk.helpers.Locales;
import org.apache.streampipes.sdk.utils.Assets;
import org.apache.streampipes.wrapper.context.EventSinkRuntimeContext;
import org.apache.streampipes.wrapper.standalone.SinkParams;
import org.apache.streampipes.wrapper.standalone.StreamPipesDataSink;

import java.io.IOException;


public class WebsocketServerSink extends StreamPipesDataSink {

    private String PORT_KEY = "port";
    private Integer port;

    private SocketServer server;

    @Override
    public DataSinkDescription declareModel() {
        return DataSinkBuilder.create("org.apache.streampipes.sinks.brokers.jvm.websocket")
                .category(DataSinkType.MESSAGING)
                .withLocales(Locales.EN)
                .withAssets(Assets.DOCUMENTATION, Assets.ICON)
                .requiredStream(StreamRequirementsBuilder
                        .create()
                        .requiredProperty(EpRequirements.anyProperty())
                        .build())
                .requiredIntegerParameter(Labels.withId(PORT_KEY))
                .build();
    }

    @Override
    public void onInvocation(SinkParams parameters, EventSinkRuntimeContext runtimeContext) throws SpRuntimeException {
        port = parameters.extractor().singleValueParameter(PORT_KEY, Integer.class);
        server = new SocketServer(port);
        server.setReuseAddr(true);
        server.start();
    }

    @Override
    public void onEvent(Event event) throws SpRuntimeException {
        server.onEvent(event);
    }

    @Override
    public void onDetach() throws SpRuntimeException {
        try {
            server.stop();
            server = null;
        } catch (IOException | InterruptedException e) {
            throw new SpRuntimeException(e.getMessage());
        }
    }
}
