import 'dart:convert';
import 'package:star_lock/app_settings/app_settings.dart';
import 'package:star_lock/talk/startChart/constant/message_type_constant.dart';
import 'package:star_lock/talk/startChart/constant/payload_type_constant.dart';
import 'package:star_lock/talk/startChart/entity/heartbeat_response.dart';
import 'package:star_lock/talk/startChart/entity/login_response.dart';
import 'package:star_lock/talk/startChart/proto/ble_message.pb.dart';
import 'package:star_lock/talk/startChart/proto/gateway_reset.pb.dart';
import 'package:star_lock/talk/startChart/proto/gateway_transfer.pb.dart';
import 'package:star_lock/talk/startChart/proto/generic.pb.dart';
import 'package:star_lock/talk/startChart/proto/remote_unlock.pb.dart';
import 'package:star_lock/talk/startChart/proto/talk_accept.pbserver.dart';
import 'package:star_lock/talk/startChart/proto/talk_data.pb.dart';
import 'package:star_lock/talk/startChart/proto/talk_expect.pb.dart';
import 'package:star_lock/talk/startChart/proto/talk_hangup.pb.dart';
import 'package:star_lock/talk/startChart/proto/talk_ping.pb.dart';
import 'package:star_lock/talk/startChart/proto/talk_push.pbserver.dart';
import 'package:star_lock/talk/startChart/proto/talk_receiver_transfer.pb.dart';
import 'package:star_lock/talk/startChart/proto/talk_reject.pb.dart';
import 'package:star_lock/talk/startChart/proto/talk_request.pb.dart';

class ScpMessage {
  ScpMessage({
    this.ProtocolFlag,
    this.MessageType,
    this.MessageId,
    this.SpTotal,
    this.SpIndex,
    this.FromPeerId,
    this.ToPeerId,
    this.PayloadType,
    this.PayloadCRC,
    this.PayloadLength,
    this.Payload,
  });

  String? ProtocolFlag;
  int? MessageType;
  int? MessageId;
  int? SpTotal;
  int? SpIndex;
  String? FromPeerId;
  String? ToPeerId;
  int? PayloadType;
  int? PayloadCRC;
  int? PayloadLength;
  dynamic Payload; // Payload可以是任何类型，这里用dynamic表示

  ScpMessage.fromJson(dynamic json) {
    ProtocolFlag = json['ProtocolFlag'];
    MessageType = json['MessageType'];
    MessageId = json['MessageId'];
    SpTotal = json['SpTotal'];
    SpIndex = json['SpIndex'];
    FromPeerId = json['FromPeerId'];
    ToPeerId = json['ToPeerId'];
    PayloadType = json['PayloadType'];
    PayloadCRC = json['PayloadCRC'];
    PayloadLength = json['PayloadLength'];
    Payload = json['Payload'];
  }

  Map<String, dynamic> toJson() {
    return {
      'ProtocolFlag': ProtocolFlag,
      'MessageType': MessageType,
      'MessageId': MessageId,
      'SpTotal': SpTotal,
      'SpIndex': SpIndex,
      'FromPeerId': FromPeerId,
      'ToPeerId': ToPeerId,
      'PayloadType': PayloadType,
      'PayloadCRC': PayloadCRC,
      'PayloadLength': PayloadLength,
      'Payload': Payload,
    };
  }

  @override
  String toString() {
    return 'ScpMessage{ProtocolFlag: $ProtocolFlag, MessageType: $MessageType, MessageId: $MessageId, SpTotal: $SpTotal, SpIndex: $SpIndex, FromPeerId: $FromPeerId, ToPeerId: $ToPeerId, PayloadType: $PayloadType, PayloadCRC: $PayloadCRC, PayloadLength: $PayloadLength, Payload: $Payload}';
  }

  String serialize() {
    final bytes = <int>[];

    // ProtocolFlag (4 bytes)
    if (ProtocolFlag != null) {
      bytes.addAll(utf8.encode(ProtocolFlag!));
    }

    // MessageType (1 byte)
    if (MessageType != null) {
      bytes.add(MessageType!);
    }

    // MessageId (2 bytes)
    if (MessageId != null) {
      final highByteMessageId = (MessageId! >> 8) & 0xFF;
      final lowByteMessageId = MessageId! & 0xFF;
      bytes.add(lowByteMessageId); // 交换位置
      bytes.add(highByteMessageId); // 交换位置
    }

    // SpTotal (1 byte)
    if (SpTotal != null) {
      bytes.add(SpTotal!);
    }

    // SpIndex (1 byte)
    if (SpIndex != null) {
      bytes.add(SpIndex!);
    }

    // FromPeerId (字符串，记录长度)
    if (FromPeerId != null) {
      bytes.addAll(utf8.encode(FromPeerId!));
    }

    // ToPeerId (字符串，假设长度固定为32字节)
    if (ToPeerId != null) {
      bytes.addAll(utf8.encode(ToPeerId!));
    }

    // PayloadType (2 bytes)
    if (PayloadType != null) {
      final highBytePayloadType = (PayloadType! >> 8) & 0xFF;
      final lowBytePayloadType = PayloadType! & 0xFF;
      bytes.add(lowBytePayloadType); // 交换位置
      bytes.add(highBytePayloadType); // 交换位置
    }

    // 计算 PayloadCRC (2 bytes)
    if (PayloadCRC != null) {
      final highBytePayloadCRC = (PayloadCRC! >> 8) & 0xFF;
      final lowBytePayloadCRC = PayloadCRC! & 0xFF;
      bytes.add(lowBytePayloadCRC); // 交换位置
      bytes.add(highBytePayloadCRC); // 交换位置
    }

    // PayloadLength (4 bytes)
    if (PayloadLength != null) {
      bytes.add(PayloadLength! & 0xFF);
      bytes.add((PayloadLength! >> 8) & 0xFF);
      bytes.add((PayloadLength! >> 16) & 0xFF);
      bytes.add((PayloadLength! >> 24) & 0xFF);
    }

    // Payload (字符串，转换为字节)
    if (Payload != null && Payload is String) {
      bytes.addAll(utf8.encode(Payload!));
    } else {
      // 如果不是字符串则需要外部转为字节数组，这里直接添加
      bytes.addAll(Payload);
    }

    // 转16进制字符串
    final bytesToHexString = bytesToHex(bytes);

    return bytesToHexString;
  }

  static ScpMessage deserialize(List<int> bytes) {
    final message = ScpMessage();
    int offset = 0;

    // ProtocolFlag (4 bytes)
    if (bytes.length - offset >= 4) {
      message.ProtocolFlag = utf8.decode(bytes.sublist(offset, offset + 4));
      offset += 4;
    } else {
      throw FormatException("Invalid ProtocolFlag length");
    }

    // MessageType (1 byte)
    if (bytes.length - offset >= 1) {
      message.MessageType = bytes[offset];
      offset += 1;
    } else {
      throw FormatException("Invalid MessageType length");
    }

    // MessageId (2 bytes, little-endian)
    if (bytes.length - offset >= 2) {
      message.MessageId = (bytes[offset + 1] << 8) | bytes[offset];
      offset += 2;
    } else {
      throw FormatException("Invalid MessageId length");
    }

    // SpTotal (1 byte)
    if (bytes.length - offset >= 1) {
      message.SpTotal = bytes[offset];
      offset += 1;
    } else {
      throw FormatException("Invalid SpTotal length");
    }

    // SpIndex (1 byte)
    if (bytes.length - offset >= 1) {
      message.SpIndex = bytes[offset];
      offset += 1;
    } else {
      throw FormatException("Invalid SpIndex length");
    }

    // FromPeerId (字符串，长度固定为44字节)
    if (bytes.length - offset >= 44) {
      message.FromPeerId =
          utf8.decode(bytes.sublist(offset, offset + 44)).trimRight();
      offset += 44;
    } else {
      throw FormatException("Invalid FromPeerId length");
    }

    // ToPeerId (字符串，长度固定为44字节)
    if (bytes.length - offset >= 44) {
      message.ToPeerId =
          utf8.decode(bytes.sublist(offset, offset + 44)).trimRight();
      offset += 44;
    } else {
      throw FormatException("Invalid ToPeerId length");
    }

    // PayloadType (2 bytes, little-endian)
    if (bytes.length - offset >= 2) {
      message.PayloadType = (bytes[offset + 1] << 8) | bytes[offset];
      offset += 2;
    } else {
      throw FormatException("Invalid PayloadType length");
    }

    // PayloadCRC (2 bytes, little-endian)
    if (bytes.length - offset >= 2) {
      message.PayloadCRC = (bytes[offset + 1] << 8) | bytes[offset];
      offset += 2;
    } else {
      throw FormatException("Invalid PayloadCRC length");
    }

    // PayloadLength (4 bytes, little-endian)
    if (bytes.length - offset >= 4) {
      message.PayloadLength = (bytes[offset] |
          (bytes[offset + 1] << 8) |
          (bytes[offset + 2] << 16) |
          (bytes[offset + 3] << 24)); // 修正为 little-endian
      offset += 4;
    } else {
      throw FormatException("Invalid PayloadLength length");
    }

    // 处理其他类型的Payload
    if (message.PayloadLength != null &&
        bytes.length - offset >= message.PayloadLength!) {
      final sublist = bytes.sublist(offset, offset + message.PayloadLength!);
      // print('sublist:$sublist');
      offset += message.PayloadLength!;
      message.Payload = _handlePayLoad(
        payloadType: message.PayloadType ?? 0,
        messageType: message.MessageType ?? 0,
        byte: sublist,
        offset: offset,
        PayloadLength: message.PayloadLength,
      );
    } else {
      throw FormatException("Invalid Payload or PayloadLength");
    }

    return message;
  }

  static String bytesToHex(List<int> bytes) {
    return bytes.map((byte) => byte.toRadixString(16).padLeft(2, '0')).join('');
  }

  // 辅助函数：将16进制字符串转换为字节数组
  static List<int> hexToBytes(String hexString) {
    final bytes = <int>[];
    for (int i = 0; i < hexString.length; i += 2) {
      final hexByte = hexString.substring(i, i + 2);
      bytes.add(int.parse(hexByte, radix: 16));
    }
    return bytes;
  }

  // 根据不同payloadType序列化对应的payload结构体
  static dynamic _handlePayLoad({
    required int payloadType,
    required int messageType,
    required List<int> byte,
    int? offset,
    int? PayloadLength,
  }) {
    try {
      switch (payloadType) {
        case PayloadTypeConstant.goOnline:
          // 上线
          LoginResponse loginResp = LoginResponse.fromBytes(byte);
          return loginResp;
        case PayloadTypeConstant.heartbeat:
          // 心跳
          HeartbeatResponse heartbeatResponse =
              HeartbeatResponse.fromBytes(byte);
          return heartbeatResponse;
        case PayloadTypeConstant.echoTest:
          // 回声测试
          String payload = utf8.decode(byte);
          return payload;
        case PayloadTypeConstant.gatewayReset:
          // 初始化网关
          if (messageType == MessageTypeConstant.Resp) {
            final GatewayResetResp gatewayResetResp =
                GatewayResetResp.fromBuffer(byte);
            return gatewayResetResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final GatewayResetReq gatewayResetReq =
                GatewayResetReq.fromBuffer(byte);
            return gatewayResetReq;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.callRequest:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final TalkReq talkReq = TalkReq.fromBuffer(byte);
            return talkReq;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.talkAccept:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final TalkAcceptReq talkAccept = TalkAcceptReq.fromBuffer(byte);
            return talkAccept;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.gatewayTransfer:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final GatewayTransferReq gatewayTransferReq =
                GatewayTransferReq.fromBuffer(byte);
            return gatewayTransferReq;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.blePassthrough:
          final BleResp bleResp = BleResp.fromBuffer(byte);
          return bleResp;
        case PayloadTypeConstant.remoteUnlock:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final RemoteUnlockResp remoteUnlockResp =
                RemoteUnlockResp.fromBuffer(byte);
            return remoteUnlockResp;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.talkReceiverTransfer:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final TalkReceiverTransfer talkReceiverTransfer =
                TalkReceiverTransfer.fromBuffer(byte);
            return talkReceiverTransfer;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.talkPush:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final TalkPush talkPush = TalkPush.fromBuffer(byte);
            return talkPush;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.talkReject:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final TalkReject talkReject = TalkReject.fromBuffer(byte);
            return talkReject;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.talkPing:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final TalkPing talkPing = TalkPing.fromBuffer(byte);
            return talkPing;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.talkExpect:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.Req) {
            final TalkExpect talkExpect = TalkExpect.fromBuffer(byte);
            return talkExpect;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.talkData:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.RealTimeData) {
            final TalkData talkData = TalkData.fromBuffer(byte);
            return talkData;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        case PayloadTypeConstant.talkHangup:
          if (messageType == MessageTypeConstant.Resp) {
            final GenericResp genericResp = GenericResp.fromBuffer(byte);
            return genericResp;
          } else if (messageType == MessageTypeConstant.RealTimeData) {
            final TalkHangup talkHangup = TalkHangup.fromBuffer(byte);
            return talkHangup;
          } else {
            String payload = utf8.decode(byte);
            return payload;
          }
        default:
          print('❌未知的payloadType类型,按照字符串解析');
          String payload = utf8.decode(byte);
          return payload;
      }
    } catch (e) {
      _log(text: '❌反序列化udp数据时遇到错误----》$e');
      String payload = utf8.decode(byte);
      return payload;
    }
  }

  static void _log({required String text}) {
    AppLog.log('=====${text}');
  }
}