import 'dart:convert';

import '../io_tool/io_tool.dart';
import '../sm4Encipher/sm4.dart';
import '../io_reply.dart';
import '../io_sender.dart';
import '../io_type.dart';
import 'package:crypto/crypto.dart' as crypto;

//TODO:转移权限
class TransferPermissionsCommand extends SenderProtocol {

  String? lockID;
  String? authUserID;
  String? keyID;
  String? oldUserID;
  String? newUserID;
  int? needAuthor;
  List<int>? publicKey;
  List<int>? privateKey;
  List<int>? token;
  TransferPermissionsCommand({
    this.lockID,
    this.authUserID,
    this.keyID,
    this.oldUserID,
    this.newUserID,
    this.needAuthor,
    this.publicKey,
    this.privateKey,
    this.token
  }) : super(CommandType.transferPermissions);


  @override
  String toString() {
    return 'TransferPermissionsCommand{lockID: $lockID, '
        'authUserID: $authUserID, keyID: $keyID, oldUserID: $oldUserID, '
        'newUserID: $newUserID, needAuthor: $needAuthor, '
        'publicKey: $publicKey, privateKey: $privateKey, token: $token}';
  }

  @override
  List<int> messageDetail() {
    List<int> data = [];
    List<int> ebcData = [];

    // 指令类型
    int type = commandType!.typeValue;
    double typeDouble = type / 256;
    int type1 = typeDouble.toInt();
    int type2 = type % 256;
    data.add(type1);
    data.add(type2);

    // 锁id 40
    int lockIDLength = utf8.encode(lockID!).length;
    data.addAll(utf8.encode(lockID!));
    data = getFixedLengthList(data, 40 - lockIDLength);

    //authUserID  20
    int authUserIDLength = utf8.encode(authUserID!).length;
    data.addAll(utf8.encode(authUserID!));
    data = getFixedLengthList(data, 20 - authUserIDLength);

    //KeyID  40
    int keyIDLength = utf8.encode(keyID!).length;
    data.addAll(utf8.encode(keyID!));
    data = getFixedLengthList(data, 40 - keyIDLength);

    //oldUserID  20
    int oldUserIDLength = utf8.encode(oldUserID!).length;
    data.addAll(utf8.encode(oldUserID!));
    data = getFixedLengthList(data, 20 - oldUserIDLength);

    //newUserID  20
    int newUserIDLength = utf8.encode(newUserID!).length;
    data.addAll(utf8.encode(newUserID!));
    data = getFixedLengthList(data, 20 - newUserIDLength);

    // token 长度4  首次请求 Token 填 0，如果锁需要鉴权 操作者身份，则会分配动态口令并在应答消息中返回，二次请求时带上。 当token失效或者第一次发送的时候token为0
    data.addAll(token!);

    if(needAuthor == 0){
      //AuthCodeLen  1
      data.add(0);
    } else {
      List<int> authCodeData = [];

      //authUserID
      authCodeData.addAll(utf8.encode(authUserID!));

      //KeyID
      authCodeData.addAll(utf8.encode(keyID!));

      //token 4 首次请求 Token 填 0，如果锁需要鉴权操作者身份，则会分配动态口令并在应答消息中返回，二次请求时带上。
      authCodeData.addAll(token!);

      authCodeData.addAll(publicKey!);

      // 把KeyID、authUserID、时间戳、公钥通过md5加密之后就是authCode
      var authCode = crypto.md5.convert(authCodeData);

      data.add(authCode.bytes.length);
      data.addAll(authCode.bytes);
    }

    if ((data.length % 16) != 0) {
      int add = (16 - data.length % 16);
      for (int i = 0; i < add; i++) {
        data.add(0);
      }
    }

    printLog(data);
    ebcData = SM4.encrypt(data, key: privateKey, mode: SM4CryptoMode.ECB);
    return ebcData;
  }
}

class TransferPermissionsReply extends Reply {
  TransferPermissionsReply.parseData(CommandType commandType, List<int> dataDetail)
      : super.parseData(commandType, dataDetail) {
    data = dataDetail;
  }
}