/*
 *  Copyright 2020 Xiaomi
 *
 *    Licensed 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 com.xiaomi.data.push.udp.handler;

import com.xiaomi.data.push.udp.po.UdpMsg;
import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.socket.DatagramPacket;
import lombok.extern.slf4j.Slf4j;

import java.util.function.Consumer;


/**
 * @author goodjava@qq.com
 */
@Slf4j
public class UdpClientHandler extends SimpleChannelInboundHandler<DatagramPacket> {

    private Consumer<UdpMsg> consumer;

    public UdpClientHandler(Consumer<UdpMsg> consumer) {
        this.consumer = consumer;
    }

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, DatagramPacket msg) {
        final ByteBuf buf = msg.content();
        int readableBytes = buf.readableBytes();
        byte[] content = new byte[readableBytes];
        buf.readBytes(content);
        String res = new String(content);
        consumer.accept(new UdpMsg(res, msg.sender().getAddress().getHostAddress()));
    }
}
