import 'dart:typed_data';

/// 极简化的 Codec：只负责中间那段变化的“负载数据”
class MachineProtocolCodec {
  /// 仅封装 0x00 指令的数据部分 (Byte 3 到 Byte 10，共 8 字节)
  static Uint8List encodeRemoteControlPayload({
    required int left,
    required int right,
    int lift = 0,
    int mower = 0,
    int ignition = 0,
    int emergency = 0,
  }) {
    final bd = ByteData(8); // 只分配 8 字节
    int pos = 0;

    bd.setInt16(pos, left, Endian.little);
    pos += 2;
    bd.setInt16(pos, right, Endian.little);
    pos += 2;
    bd.setUint8(pos++, lift);
    bd.setUint8(pos++, mower);
    bd.setUint8(pos++, ignition);
    bd.setUint8(pos++, emergency);

    return bd.buffer.asUint8List();
  }
}