/*
 * 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.airavata.mft.agent.http;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.handler.ssl.SslContext;
import io.netty.handler.ssl.SslProvider;
import io.netty.handler.ssl.util.SelfSignedCertificate;

public class HttpServer {

    private final int port;
    private final boolean enableSSL;
    private HttpTransferRequestsStore transferRequestsStore;

    public HttpServer(int port, boolean enableSSL, HttpTransferRequestsStore transferRequestsStore) {
        this.port = port;
        this.enableSSL = enableSSL;
        this.transferRequestsStore = transferRequestsStore;
    }

    public void run() throws Exception {
        // Configure SSL.
        final SslContext sslCtx;
        if (enableSSL) {
            SelfSignedCertificate ssc = new SelfSignedCertificate();
            sslCtx = SslContext.newServerContext(SslProvider.JDK, ssc.certificate(), ssc.privateKey());
        } else {
            sslCtx = null;
        }

        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .handler(new LoggingHandler(LogLevel.INFO))
                    .childHandler(new HttpServerInitializer(sslCtx, transferRequestsStore));

            Channel ch = b.bind(port).sync().channel();

            System.err.println("Open your web browser and navigate to " +
                    (enableSSL? "https" : "http") + "://127.0.0.1:" + port + '/');

            ch.closeFuture().sync();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }
}