import 'dart:io';

import 'package:collection/collection.dart';
import 'package:cw_core/pathForWallet.dart';
import 'package:cw_core/utils/print_verbose.dart';
import 'package:cw_core/wallet_base.dart';
import 'package:cw_core/wallet_credentials.dart';
import 'package:cw_core/wallet_info.dart';
import 'package:cw_core/wallet_service.dart';
import 'package:cw_core/wallet_type.dart';
import 'package:cw_zano/zano_wallet.dart';
import 'package:cw_zano/zano_wallet_api.dart';
import 'package:hive/hive.dart';
import 'package:monero/zano.dart' as zano;

class ZanoNewWalletCredentials extends WalletCredentials {
  ZanoNewWalletCredentials({required String name, String? password, required String? passphrase}) : super(name: name, password: password, passphrase: passphrase);
}

class ZanoRestoreWalletFromSeedCredentials extends WalletCredentials {
  ZanoRestoreWalletFromSeedCredentials({required String name, required String password, required String passphrase, required int height, required this.mnemonic})
      : super(name: name, password: password, passphrase: passphrase, height: height);

  final String mnemonic;
}

class ZanoRestoreWalletFromKeysCredentials extends WalletCredentials {
  ZanoRestoreWalletFromKeysCredentials(
      {required String name,
      required String password,
      required this.language,
      required this.address,
      required this.viewKey,
      required this.spendKey,
      required int height})
      : super(name: name, password: password, height: height);

  final String language;
  final String address;
  final String viewKey;
  final String spendKey;
}

class ZanoWalletService extends WalletService<ZanoNewWalletCredentials, 
    ZanoRestoreWalletFromSeedCredentials, ZanoRestoreWalletFromKeysCredentials, ZanoNewWalletCredentials> {
  ZanoWalletService();

  static bool walletFilesExist(String path) => !File(path).existsSync() && !File('$path.keys').existsSync();

  int hWallet = 0;

  @override
  WalletType getType() => WalletType.zano;

  @override
  Future<ZanoWallet> create(WalletCredentials credentials, {bool? isTestnet}) async {
    printV('zanowallet service create isTestnet $isTestnet');
    return await ZanoWalletBase.create(credentials: credentials);
  }

  @override
  Future<bool> isWalletExit(String name) async {
    final path = await pathForWallet(name: name, type: getType());
    return zano.PlainWallet_isWalletExist(path);
  }

  @override
  Future<ZanoWallet> openWallet(String name, String password) async {
    final walletInfo = await WalletInfo.get(name, getType());
    if (walletInfo == null) {
      throw Exception('Wallet not found');
    }
    try {
      final wallet = await ZanoWalletBase.open(name: name, password: password, walletInfo: walletInfo);
      saveBackup(name);
      return wallet;
    } catch (e) {
      await restoreWalletFilesFromBackup(name);
      return await ZanoWalletBase.open(name: name, password: password, walletInfo: walletInfo);
    }
  }

  @override
  Future<void> remove(String wallet) async {
    final path = await pathForWalletDir(name: wallet, type: getType());
    final file = Directory(path);
    final isExist = file.existsSync();

    if (isExist) {
      await file.delete(recursive: true);
    }

    final walletInfo = await WalletInfo.get(wallet, getType());
    if (walletInfo == null) {
      throw Exception('Wallet not found');
    }
    await WalletInfo.delete(walletInfo);
  }

  @override
  Future<void> rename(String currentName, String password, String newName) async {
    final currentWalletInfo = await WalletInfo.get(currentName, getType());
    if (currentWalletInfo == null) {
      throw Exception('Wallet not found');
    }
    final currentWallet = ZanoWallet(currentWalletInfo, await currentWalletInfo.getDerivationInfo(), password);

    await currentWallet.renameWalletFiles(newName);

    final newWalletInfo = currentWalletInfo;
    newWalletInfo.id = WalletBase.idFor(newName, getType());
    newWalletInfo.name = newName;

    await newWalletInfo.save();
  }

  @override
  Future<ZanoWallet> restoreFromKeys(ZanoRestoreWalletFromKeysCredentials credentials, {bool? isTestnet}) async {
    throw UnimplementedError();
  }

  @override
  Future<ZanoWallet> restoreFromSeed(ZanoRestoreWalletFromSeedCredentials credentials, {bool? isTestnet}) async {
    return ZanoWalletBase.restore(credentials: credentials);
  }

  @override
  Future<ZanoWallet> restoreFromHardwareWallet(ZanoNewWalletCredentials credentials) {
    throw UnimplementedError("Restoring a Zano wallet from a hardware wallet is not yet supported!");
  }
}