package com.example.mina.client.box.aeroflex;

import com.example.mina.client.base.MatrixCommand;
import com.example.mina.client.base.MatrixResponse;
import lombok.extern.slf4j.Slf4j;
import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.*;

import java.nio.charset.CharacterCodingException;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.StandardCharsets;

@Slf4j
public class AeroFlexProtocolFactory implements ProtocolCodecFactory {

    private static final CharsetDecoder DECODER = StandardCharsets.UTF_8.newDecoder();

    private static final CharsetEncoder ENCODER = StandardCharsets.UTF_8.newEncoder();

    @Override
    public ProtocolEncoder getEncoder(IoSession ioSession) throws Exception {
        return new AeroFlexProtocolEncoder();
    }

    @Override
    public ProtocolDecoder getDecoder(IoSession ioSession) throws Exception {
        return new AeroFlexProtocolDecoder();
    }

    public static class AeroFlexProtocolEncoder extends ProtocolEncoderAdapter {

        @Override
        public void encode(IoSession ioSession, Object msg, ProtocolEncoderOutput protocolEncoderOutput)
                throws CharacterCodingException {

            if (!(msg instanceof MatrixCommand)) {
                log.error("error msg, msg is: {}", msg);
                return;
            }

            MatrixCommand mc = (MatrixCommand) msg;
            log.info("---发送数据参数!Attn = {},Col = {},Command = {},Row = {},MatrixId = {},type = {}",
                    mc.getAttn(),
                    mc.getCol(),
                    mc.getCommand(),
                    mc.getRow(),
                    mc.getMatrixId(),
                    mc.getType()
            );
            MatrixCommand.Type mcType = mc.getType();

            IoBuffer buffer = IoBuffer.allocate(100, false).setAutoExpand(true);

            if (MatrixCommand.Type.AERO_ATTN_ALL_MAX.equals(mcType)) {

                buffer.putString("ATTN ALL MAX", ENCODER);

            } else if (MatrixCommand.Type.AERO_GET_ATTN.equals(mcType)) {

                buffer.putString("ATTN?", ENCODER);
                buffer.putString(" ", ENCODER);
                buffer.putString(mc.getRow().toString(), ENCODER);

            } else if (MatrixCommand.Type.AERO_SET_ATTN.equals(mcType)) {

                buffer.putString("ATTN", ENCODER);
                buffer.putString(" ", ENCODER);
                buffer.putString(mc.getRow().toString(), ENCODER);
                buffer.putString(" ", ENCODER);
                buffer.putString(mc.getAttn().toString(), ENCODER);
                buffer.putString(";", ENCODER);
            }

            buffer.flip();
            protocolEncoderOutput.write(buffer);
        }
    }

    public static class AeroFlexProtocolDecoder extends ProtocolDecoderAdapter {

        @Override
        public void decode(IoSession ioSession, IoBuffer ioBuffer, ProtocolDecoderOutput protocolDecoderOutput)
                throws Exception {
            log.info("--server返回给----client ------IoBuffer{}", ioBuffer);
            int cmd = ioBuffer.get();
            MatrixResponse response = new MatrixResponse();  // todo

            protocolDecoderOutput.write(ioBuffer);
        }

    }

}