package org.springblade.modules.nettyServer;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.group.ChannelGroup;
import io.netty.channel.group.ChannelMatcher;
import io.netty.channel.group.DefaultChannelGroup;
import io.netty.util.CharsetUtil;
import io.netty.util.concurrent.GlobalEventExecutor;
import org.springblade.modules.alarm.service.IAlarmService;
import org.springblade.modules.alarm.vo.AlarmVO;
import org.springblade.modules.catalog.service.catalogService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.annotation.PostConstruct;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

@Component
public class ServerHandler extends ChannelInboundHandlerAdapter {

	@Autowired
	private catalogService catalogService;

	private static ServerHandler serverHandler;

	@PostConstruct
	public void init() {
		serverHandler = this;
	}
	/**
	 * 客户端与服务端创建连接的时候调用
	 */
	@Override
	public void channelActive(ChannelHandlerContext ctx) throws Exception {
		System.out.println("客户端与服务端连接开始...");
		System.out.println("Channel:"+ctx.channel());
		NettyConfig.group.add(ctx.channel());
	}

	/**
	 * 客户端与服务端断开连接时调用
	 */
	@Override
	public void channelInactive(ChannelHandlerContext ctx) throws Exception {
		System.out.println("客户端与服务端连接关闭...");
		NettyConfig.group.remove(ctx.channel());
	}

	/**
	 * 服务端接收客户端发送过来的数据结束之后调用
	 */
	@Override
	public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
		ctx.flush();
		System.out.println("信息接收完毕...");
	}

	/**
	 * 工程出现异常的时候调用
	 */
	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
		cause.printStackTrace();
		ctx.close();
	}

	/**
	 * 服务端处理客户端websocket请求的核心方法，这里接收了客户端发来的信息
	 */
	@Override
	public void channelRead(ChannelHandlerContext channelHandlerContext, Object info) throws Exception {
		System.out.println("接收到了："+info);
		ByteBuf buf = (ByteBuf) info;
		byte[] req = new byte[buf.readableBytes()];
		buf.readBytes(req);
		String body = new String(req, "UTF-8");
		System.out.println("接收客户端数据:" + body);
		channelHandlerContext.writeAndFlush(Unpooled.copiedBuffer("LEOK#@!", CharsetUtil.UTF_8));
		List<Map<String, Object>> list = serverHandler.catalogService.selectCatalogList();
		System.out.println(list);
//		ByteBuf pingMessage = Unpooled.buffer();
//		pingMessage.writeBytes(req);
//		channelHandlerContext.writeAndFlush(pingMessage);


		//服务端使用这个就能向 每个连接上来的客户端群发消息
		//NettyConfig.group.writeAndFlush(info);
		Iterator<Channel> iterator = NettyConfig.group.iterator();
		System.out.println("iterator:"+iterator);
        while(iterator.hasNext()){
          //打印出所有客户端的远程地址
           System.out.println((iterator.next()).remoteAddress());

		}
	}




}