import 'package:flutter/foundation.dart';
import 'package:mobx/mobx.dart';
import 'package:cw_monero/wallet.dart';
import 'package:cw_monero/wallet.dart' as monero_wallet;
import 'package:cake_wallet/monero/monero_wallet_keys.dart';
import 'package:cake_wallet/monero/monero_balance.dart';
import 'package:cake_wallet/monero/monero_transaction_history.dart';
import 'package:cake_wallet/monero/monero_subaddress_list.dart';
import 'package:cake_wallet/monero/monero_account_list.dart';
import 'package:cake_wallet/core/wallet_base.dart';
import 'package:cake_wallet/core/transaction_history.dart';
import 'package:cake_wallet/src/domain/common/crypto_currency.dart';
import 'package:cake_wallet/src/domain/common/wallet_type.dart';
import 'package:cake_wallet/src/domain/common/sync_status.dart';
import 'package:cake_wallet/src/domain/monero/account.dart';
import 'package:cake_wallet/src/domain/monero/account_list.dart';
import 'package:cake_wallet/src/domain/monero/subaddress.dart';
import 'package:cake_wallet/src/domain/common/node.dart';
import 'package:cake_wallet/core/pending_transaction.dart';
import 'package:cake_wallet/src/domain/common/transaction_priority.dart';
import 'package:cake_wallet/src/domain/common/calculate_fiat_amount.dart' as cfa;

part 'monero_wallet.g.dart';

class MoneroWallet = MoneroWalletBase with _$MoneroWallet;

abstract class MoneroWalletBase extends WalletBase<MoneroBalance> with Store {
  MoneroWalletBase({String filename, this.isRecovery = false})
      : transactionHistory = MoneroTransactionHistory(),
        accountList = MoneroAccountList(),
        subaddressList = MoneroSubaddressList() {
    _filename = filename;
    balance = MoneroBalance(
        fullBalance: monero_wallet.getFullBalance(accountIndex: 0),
        unlockedBalance: monero_wallet.getFullBalance(accountIndex: 0));
    currency = CryptoCurrency.xmr;
    type = WalletType.monero;
    _rct = reaction(
        (_) => syncStatus, (SyncStatus status) => print(status.toString()));
    _onAccountChangeReaction = reaction((_) => account, (Account account) {
      subaddressList.update(accountIndex: account.id);
      subaddress = subaddressList.subaddresses.first;
      address = subaddress.address;
    });
  }

  ReactionDisposer _rct;

  @override
  final MoneroTransactionHistory transactionHistory;

  @observable
  Account account;

  @observable
  Subaddress subaddress;

  @observable
  SyncStatus syncStatus;

  @override
  String get name => _filename.split('/').last;

  @override
  @observable
  String address;

  @override
  String get seed => monero_wallet.getSeed();

  @override
  MoneroWalletKeys get keys => MoneroWalletKeys(
      privateSpendKey: monero_wallet.getSecretSpendKey(),
      privateViewKey: monero_wallet.getSecretViewKey(),
      publicSpendKey: monero_wallet.getPublicSpendKey(),
      publicViewKey: monero_wallet.getPublicViewKey());

  final MoneroSubaddressList subaddressList;

  final MoneroAccountList accountList;

  bool isRecovery;

  String _filename;
  SyncListner _listener;
  ReactionDisposer _onAccountChangeReaction;

  Future<void> init() async {
    await accountList.update();
    account = accountList.accounts.first;
    subaddressList.update(accountIndex: account.id ?? 0);
    subaddress = subaddressList.getAll().first;
    balance = MoneroBalance(
        fullBalance: monero_wallet.getFullBalance(accountIndex: account.id),
        unlockedBalance:
            monero_wallet.getFullBalance(accountIndex: account.id));
    address = subaddress.address;
    _setListeners();
  }

  void close() {
    _listener?.stop();
    _onAccountChangeReaction?.reaction?.dispose();
  }

  @override
  Future<void> connectToNode({@required Node node}) async {
    final node = Node(uri: 'xmr-node-uk.cakewallet.com:18081');

    try {
      syncStatus = ConnectingSyncStatus();
      await monero_wallet.setupNode(
          address: node.uri,
          login: node.login,
          password: node.password,
          useSSL: false,
          // FIXME: hardcoded value
          isLightWallet: false); // FIXME: hardcoded value
      syncStatus = ConnectedSyncStatus();
    } catch (e) {
      syncStatus = FailedSyncStatus();
      print(e);
    }
  }

  @override
  Future<void> startSync() async {
    try {
      syncStatus = StartingSyncStatus();
      monero_wallet.startRefresh();
    } catch (e) {
      syncStatus = FailedSyncStatus();
      print(e);
      rethrow;
    }
  }

  @override
  Future<PendingTransaction> createTransaction(Object credentials) async {
//    final _credentials = credentials as MoneroTransactionCreationCredentials;
//    final transactionDescription = await transaction_history.createTransaction(
//        address: _credentials.address,
//        paymentId: _credentials.paymentId,
//        amount: _credentials.amount,
//        priorityRaw: _credentials.priority.serialize(),
//        accountIndex: _account.value.id);
//
//    return PendingTransaction.fromTransactionDescription(
//        transactionDescription);
  }

  @override
  double calculateEstimatedFee(TransactionPriority priority) {
    // FIXME: hardcoded value;

    if (priority == TransactionPriority.slow) {
      return 0.00002459;
    }

    if (priority == TransactionPriority.regular) {
      return 0.00012305;
    }

    if (priority == TransactionPriority.medium) {
      return 0.00024503;
    }

    if (priority == TransactionPriority.fast) {
      return 0.00061453;
    }

    if (priority == TransactionPriority.fastest) {
      return 0.0260216;
    }

    return 0;
  }

  @override
  Future<void> save() async {
//    if (_isSaving) {
//      return;
//    }

    try {
//      _isSaving = true;
      await monero_wallet.store();
//      _isSaving = false;
    } catch (e) {
      print(e);
//      _isSaving = false;
      rethrow;
    }
  }

  Future<int> getNodeHeight() async => monero_wallet.getNodeHeight();

  Future<bool> isConnected() async => monero_wallet.isConnected();

  void _setListeners() {
    _listener?.stop();
    _listener = monero_wallet.setListeners(
        _onNewBlock, _onNeedToRefresh, _onNewTransaction);
    _listener.start();
  }

  void _askForUpdateBalance() {
    final fullBalance = _getFullBalance();
    final unlockedBalance = _getUnlockedBalance();

    if (balance.fullBalance != fullBalance ||
        balance.unlockedBalance != unlockedBalance) {
      balance = MoneroBalance(
          fullBalance: fullBalance, unlockedBalance: unlockedBalance);
    }
  }

  void _askForUpdateTransactionHistory() =>
      null; // await getHistory().update();

  int _getFullBalance() =>
      monero_wallet.getFullBalance(accountIndex: account.id);

  int _getUnlockedBalance() =>
      monero_wallet.getUnlockedBalance(accountIndex: account.id);

  void _onNewBlock(int height, int blocksLeft, double ptc) =>
      syncStatus = SyncingSyncStatus(blocksLeft, ptc);

  Future _onNeedToRefresh() async {
    if (syncStatus is FailedSyncStatus) {
      return;
    }

    syncStatus = SyncedSyncStatus();

    if (isRecovery) {
      _askForUpdateTransactionHistory();
    }

//      if (isRecovery && (nodeHeight - currentHeight < moneroBlockSize)) {
//        await setAsRecovered();
//      }

    await save();
  }

  void _onNewTransaction() {
    _askForUpdateBalance();
    _askForUpdateTransactionHistory();
  }
}