// import 'dart:ffi';
import 'dart:io';
import 'dart:typed_data';
import 'package:crypto/crypto.dart';
import 'package:dubp/dubp.dart';
import 'package:fast_base58/fast_base58.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'dart:async';
import 'package:gecko/globals.dart';
import 'package:gecko/models/my_wallets.dart';
import 'package:gecko/models/wallet_data.dart';
import 'package:image_picker/image_picker.dart';
import 'package:truncate/truncate.dart';
import 'package:qrscan/qrscan.dart' as scanner;

class WalletOptionsProvider with ChangeNotifier {
  TextEditingController pubkey = TextEditingController();
  final TextEditingController _newWalletName = TextEditingController();
  bool isWalletUnlock = false;
  bool ischangedPin = false;
  TextEditingController newPin = TextEditingController();
  bool isEditing = false;
  bool isBalanceBlur = true;
  FocusNode walletNameFocus = FocusNode();
  TextEditingController nameController = TextEditingController();
  List<int> walletID;
  bool isDefaultWallet;

  Future<NewWallet> get badWallet => null;

  Future _getPubkeyFromDewif(
      String _dewif, _pin, int _pinLenght, int derivation) async {
    String _pubkey;
    RegExp regExp = RegExp(
      r'^[A-Z0-9]+$',
      caseSensitive: false,
      multiLine: false,
    );

    if (regExp.hasMatch(_pin) == true && _pin.length == _pinLenght) {
    } else {
      return 'false';
    }
    if (derivation != -1) {
      try {
        List _pubkeysTmp = await DubpRust.getBip32DewifAccountsPublicKeys(
            dewif: _dewif, secretCode: _pin, accountsIndex: [derivation]);
        _pubkey = _pubkeysTmp[0];
        pubkey.text = _pubkey;
        notifyListeners();

        return _pubkey;
      } catch (e) {
        log.w('Bad PIN code !\n' + e);
        notifyListeners();

        return 'false';
      }
    } else {
      try {
        _pubkey = await DubpRust.getDewifPublicKey(dewif: _dewif, pin: _pin);
        pubkey.text = _pubkey;
        notifyListeners();
        return _pubkey;
      } catch (e) {
        log.w('Bad PIN code !\n' + e);
        notifyListeners();

        return 'false';
      }
    }
  }

  Future readLocalWallet(
      context, WalletData _wallet, String _pin, int _pinLenght) async {
    isWalletUnlock = false;
    try {
      String _localDewif = chestBox.get(configBox.get('currentChest')).dewif;
      String _localPubkey;

      if ((_localPubkey = await _getPubkeyFromDewif(
              _localDewif, _pin, _pinLenght, _wallet.derivation)) !=
          'false') {
        pubkey.text = _localPubkey;
        isWalletUnlock = true;
        return _localDewif;
      } else {
        throw 'Bad pubkey';
      }
    } catch (e) {
      // _homeProvider.playSound('non', 0.6);
      log.e('ERROR READING FILE: $e');
      pubkey.clear();
      return 'bad';
    }
  }

  Future checkPinOK(String _createdDewif, String _pin, int _pinLenght) async {
    isWalletUnlock = false;
    try {
      if (await _getPubkeyFromDewif(_createdDewif, _pin, _pinLenght, 3) !=
          'false') {
        return true;
      } else {
        throw false;
      }
    } catch (e) {
      log.e('ERROR READING FILE: $e');
      return false;
    }
  }

  int getPinLenght(_walletNbr) {
    String _localDewif;
    if (_walletNbr is int) {
      _localDewif = chestBox.get(configBox.get('currentChest')).dewif;
    } else {
      _localDewif = _walletNbr;
    }

    final int _pinLenght = DubpRust.getDewifSecretCodeLen(
        dewif: _localDewif, secretCodeType: SecretCodeType.letters);

    return _pinLenght;
  }

  void _renameWallet(List<int> _walletID, _newName) async {
    MyWalletsProvider myWalletClass = MyWalletsProvider();

    WalletData _walletTarget = myWalletClass.getWalletData(_walletID);
    _walletTarget.name = _newName;
    await walletBox.put(_walletTarget.key, _walletTarget);

    _newWalletName.text = '';
  }

  Future<bool> renameWalletAlerte(
      context, _walletName, _walletNbr, _derivation) async {
    return showDialog<bool>(
      context: context,
      barrierDismissible: true,
      builder: (BuildContext context) {
        return AlertDialog(
          title: const Text('Choisissez un nouveau nom pour ce portefeuille'),
          content: SingleChildScrollView(
            child: ListBody(
              children: <Widget>[
                TextField(
                    controller: _newWalletName,
                    maxLines: 1,
                    textAlign: TextAlign.center,
                    decoration: const InputDecoration(),
                    style: const TextStyle(
                        fontSize: 14.0,
                        color: Colors.black,
                        fontWeight: FontWeight.bold)),
              ],
            ),
          ),
          actions: <Widget>[
            TextButton(
              child: const Text("Valider"),
              onPressed: () {
                WidgetsBinding.instance.addPostFrameCallback((_) async {
                  // await _renameWallet(_walletName, this._newWalletName.text,
                  //     _walletNbr, _derivation);
                });
                // notifyListeners();
                Navigator.pop(context, true);
              },
            ),
          ],
        );
      },
    );
  }

  bool editWalletName(List<int> _wID) {
    bool nameState;
    if (isEditing) {
      if (!nameController.text.contains(':') &&
          nameController.text.length <= 39) {
        _renameWallet(_wID, nameController.text);
        nameState = true;
      } else {
        nameState = false;
      }
    } else {
      nameState = true;
    }

    isEditing ? isEditing = false : isEditing = true;
    notifyListeners();
    return nameState;
  }

  Future<int> deleteWallet(context, WalletData wallet) async {
    final bool _answer = await _confirmDeletingWallet(context, wallet.name);

    if (_answer) {
      walletBox.delete(wallet.key);

      Navigator.popUntil(
        context,
        ModalRoute.withName('/mywallets'),
      );
    }
    return 0;
  }

  Future<bool> _confirmDeletingWallet(context, _walletName) async {
    return showDialog<bool>(
      context: context,
      barrierDismissible: true, // user must tap button!
      builder: (BuildContext context) {
        return AlertDialog(
          title: Text(
              'Êtes-vous sûr de vouloir supprimer le portefeuille "$_walletName" ?'),
          content: SingleChildScrollView(
            child: ListBody(
              children: const <Widget>[
                Text('Vous pourrez restaurer ce portefeuille plus tard.'),
              ],
            ),
          ),
          actions: <Widget>[
            TextButton(
              child: const Text("Non", key: Key('cancelDeleting')),
              onPressed: () {
                Navigator.pop(context, false);
              },
            ),
            TextButton(
              child: const Text("Oui", key: Key('confirmDeleting')),
              onPressed: () {
                Navigator.pop(context, true);
              },
            ),
          ],
        );
      },
    );
  }

  snackCopyKey(context) {
    const snackBar = SnackBar(
        content:
            Text("Cette clé publique a été copié dans votre presse-papier."),
        duration: Duration(seconds: 2));
    ScaffoldMessenger.of(context).showSnackBar(snackBar);
  }

  String getShortPubkey(String pubkey) {
    log.d(pubkey);
    List<int> pubkeyByte = Base58Decode(pubkey);
    Digest pubkeyS256 = sha256.convert(sha256.convert(pubkeyByte).bytes);
    String pubkeyCheksum = Base58Encode(pubkeyS256.bytes);
    String pubkeyChecksumShort = truncate(pubkeyCheksum, 3,
        omission: "", position: TruncatePosition.end);

    String pubkeyShort = truncate(pubkey, 5,
            omission: String.fromCharCode(0x2026),
            position: TruncatePosition.end) +
        truncate(pubkey, 4, omission: "", position: TruncatePosition.start) +
        ':$pubkeyChecksumShort';

    return pubkeyShort;
  }

  void bluringBalance() {
    isBalanceBlur = !isBalanceBlur;
    notifyListeners();
  }

  Future<Uint8List> generateQRcode(String _pubkey) async {
    return await scanner.generateBarCode(_pubkey);
  }

  Future changeAvatar() async {
    File _image;
    final picker = ImagePicker();

    final pickedFile = await picker.pickImage(source: ImageSource.gallery);

    if (pickedFile != null) {
      _image = File(pickedFile.path);
      return _image;
    } else {
      log.w('No image selected.');
    }
  }

  void reloadBuild() {
    notifyListeners();
  }
}