/*
 * 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.custos.clients.core;

import io.grpc.ManagedChannel;
import io.grpc.ManagedChannelBuilder;
import io.grpc.netty.GrpcSslContexts;
import io.grpc.netty.NettyChannelBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.Closeable;
import java.io.IOException;

/**
 * This client will work as an Abstract client for all Java clients
 */
public abstract  class AbstractClient implements Closeable {

    private static final Logger LOGGER = LoggerFactory.getLogger(AbstractClient.class);

    public ManagedChannel managedChannel;

    public AbstractClient(String serviceHost, int servicePort, String clientId,
                          String clientSecret) throws IOException {
        managedChannel = NettyChannelBuilder.forAddress(serviceHost, servicePort)
                .sslContext(GrpcSslContexts
                        .forClient()
                        .trustManager(ClientUtils.getServerCertificate(serviceHost, clientId, clientSecret)) // public key
                        .build())
                .build();
    }

    public AbstractClient(String serviceHost, int servicePort) throws IOException {
        managedChannel = ManagedChannelBuilder.forAddress(serviceHost,servicePort)
                         .usePlaintext().build();
    }

    public AbstractClient(String serviceHost, int servicePort,String clientId,
                          String clientSecret, boolean plainText) throws IOException {
        if (plainText) {
            managedChannel = ManagedChannelBuilder.forAddress(serviceHost, servicePort)
                    .usePlaintext().build();
        }else {
            managedChannel = NettyChannelBuilder.forAddress(serviceHost, servicePort)
                    .sslContext(GrpcSslContexts
                            .forClient()
                            .trustManager(ClientUtils.getServerCertificate(serviceHost, clientId, clientSecret)) // public key
                            .build())
                    .build();

        }
    }

    @Override
    public void close() throws IOException {
        if (managedChannel != null){
            managedChannel.shutdown();
        }
    }

    public boolean isShutdown() {
        return managedChannel.isShutdown();
    }
}
