package com.zinglabs.zwerewolf.manager;

import com.zinglabs.zwerewolf.constant.ProtocolConstant;
import com.zinglabs.zwerewolf.entity.Packet;
import com.zinglabs.zwerewolf.entity.UserChannel;
import com.zinglabs.zwerewolf.im.IMChannelGroup;
import io.netty.buffer.ByteBuf;
import io.netty.channel.Channel;

import java.util.Map;

/**
 * 聊天消息转发器
 * author: vector.huang
 * date：2016/4/18 21:01
 */
public class IMMessageManager {

    /**
     * 群聊文字消息转发
     * @param body 消息体
     */
    public static void sendGroupTextReq(ByteBuf body){
        int fromId = body.readInt();
        byte[] contentByte = new byte[body.readableBytes()];  
        //4、复制内容到字节数组b  
        body.readBytes(contentByte);  
        Map<Integer, UserChannel> userChannels = IMChannelGroup.instance().getChannels();
        userChannels.forEach((userId,userChannel)->{
        	Channel toChannel = userChannel.getChannel();
        	if(toChannel==null){
        	    return;
            }
        	byte[] fromName = userChannels.get(fromId).getUsername().getBytes();
        	
        	ByteBuf msg = toChannel.alloc().buffer(contentByte.length + fromName.length + 12);
        	
            msg.writeInt(fromId);
            
            msg.writeInt(fromName.length);

            msg.writeBytes(fromName);
            
            msg.writeInt(contentByte.length);
            msg.writeBytes(contentByte);
            Packet packet = new Packet(msg.readableBytes()+12, ProtocolConstant.SID_MSG,ProtocolConstant.CID_MSG_TEXT_RESP,
                    msg);


            toChannel.writeAndFlush(packet);
            System.out.println("send to  username: %s, msg: %s"+body);
        });
    }

    /**
     * 群聊语音消息转发
     * @param body 消息体
     */
	public static void sendGroupVoiceReq(ByteBuf body) {
		int fromId = body.readInt();
		int audiodataLength =  body.readInt();
        byte[] audiodata = new byte[audiodataLength];
        body.readBytes(audiodataLength).readBytes(audiodata);
        //4、复制内容到字节数组b  
        Map<Integer, UserChannel> userChannels = IMChannelGroup.instance().getChannels();
        userChannels.forEach((userId,userChannel)->{
        	if(userId != fromId){
        		Channel toChannel = userChannel.getChannel();
                if(toChannel==null){
                    return;
                }
        		ByteBuf msg = toChannel.alloc().buffer(audiodata.length + 4);
        		
        		msg.writeInt(audiodata.length);
        		msg.writeBytes(audiodata);
        		Packet packet = new Packet(msg.readableBytes()+12, ProtocolConstant.SID_MSG,ProtocolConstant.CID_MSG_VOICE_RESP,
                        msg);
                toChannel.writeAndFlush(packet);
        	}
        });
	}



}