package cc.mrbird.febs.common.websocket;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.handler.stream.ChunkedWriteHandler;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class NettyWebSocketConfig {

    @Value("${netty.websocket.port:9102}")
    private int port;

    @Bean(name = "bossGroup", destroyMethod = "shutdownGracefully")
    public EventLoopGroup bossGroup() {
        return new NioEventLoopGroup(1);
    }

    @Bean(name = "workerGroup", destroyMethod = "shutdownGracefully")
    public EventLoopGroup workerGroup() {
        return new NioEventLoopGroup();
    }

    @Bean
    public ServerBootstrap serverBootstrap(EventLoopGroup bossGroup, EventLoopGroup workerGroup) {
        ServerBootstrap bootstrap = new ServerBootstrap();
        bootstrap.group(bossGroup, workerGroup)
                .channel(NioServerSocketChannel.class)
                .option(ChannelOption.SO_BACKLOG, 128)
                .childOption(ChannelOption.SO_KEEPALIVE, true)
                .handler(new LoggingHandler(LogLevel.INFO))
                .childHandler(new io.netty.channel.ChannelInitializer<io.netty.channel.socket.SocketChannel>() {
                    @Override
                    protected void initChannel(io.netty.channel.socket.SocketChannel ch) throws Exception {
                        ch.pipeline().addLast(new HttpServerCodec());
                        ch.pipeline().addLast(new ChunkedWriteHandler());
                        ch.pipeline().addLast(new HttpObjectAggregator(65536));
                        ch.pipeline().addLast(new WebSocketServerProtocolHandler("/ws"));
                        ch.pipeline().addLast(new cc.mrbird.febs.common.websocket.WebSocketServerHandler());
                    }
                });
        return bootstrap;
    }
}