import 'package:hash_wallet/reactions/wallet_connect.dart';
import 'package:hash_wallet/src/screens/transaction_details/address_list_item.dart';
import 'package:hash_wallet/src/screens/transaction_details/confirmations_list_item.dart';
import 'package:hash_wallet/store/app_store.dart';
import 'package:hash_wallet/core/address_validator.dart';
import 'package:cw_core/crypto_amount_format.dart';
import 'package:cw_core/crypto_currency.dart';
import 'package:cw_core/currency_for_wallet_type.dart';
import 'package:cw_core/utils/print_verbose.dart';
import 'package:cw_core/wallet_base.dart';
import 'package:cw_core/transaction_info.dart';
import 'package:cw_core/wallet_type.dart';
import 'package:hash_wallet/evm/evm.dart';
import 'package:hash_wallet/bitcoin/bitcoin.dart';
import 'package:hash_wallet/entities/priority_for_wallet_type.dart';
import 'package:hash_wallet/entities/transaction_description.dart';
import 'package:hash_wallet/generated/i18n.dart';
import 'package:hash_wallet/monero/monero.dart';
import 'package:hash_wallet/src/screens/transaction_details/rbf_details_list_fee_picker_item.dart';
import 'package:hash_wallet/src/screens/transaction_details/standart_list_item.dart';
import 'package:hash_wallet/src/screens/transaction_details/transaction_details_list_item.dart';
import 'package:hash_wallet/src/screens/transaction_details/transaction_expandable_list_item.dart';
import 'package:hash_wallet/utils/date_formatter.dart';
import 'package:hash_wallet/view_model/send/send_view_model.dart';
import 'package:collection/collection.dart';
import 'package:cw_core/transaction_direction.dart';
import 'package:cw_core/transaction_priority.dart';
import 'package:flutter/foundation.dart';
import 'package:hive/hive.dart';
import 'package:mobx/mobx.dart';
import 'package:url_launcher/url_launcher.dart';

part 'transaction_details_view_model.g.dart';

bool _trueFunc(_) => true;

bool isLightning(TransactionInfo tx) {
  printV(tx.additionalInfo);
  return (tx.additionalInfo["isLightning"] as bool?) ?? false;
}

class TxDetailRowDefinition {
  final String keyString;
  final String title;
  final String Function(TransactionDetailsViewModelBase) valueGetter;
  final bool Function(TransactionDetailsViewModelBase) applicable;
  final dynamic Function({
    required String title,
    required String value,
    required Key key,
  }) listItemBuilder;

  TxDetailRowDefinition(
      {required this.keyString,
      required this.title,
      required this.valueGetter,
      this.applicable = _trueFunc,
      this.listItemBuilder = StandartListItem.new});

  static final List<TxDetailRowDefinition> defs = [
    TxDetailRowDefinition(
        keyString: "standard_list_item_transaction_details_date_key",
        title: S.current.transaction_details_date,
        valueGetter: (vm) => DateFormatter.withCurrentLocal().format(vm.transactionInfo.date)),


    TxDetailRowDefinition(
        keyString: "standard_list_item_transaction_details_height_key",
        title: S.current.transaction_details_height,
        valueGetter: (vm) => vm.transactionInfo.height?.toString() ?? "",
        applicable: (vm) => !isLightning(vm.transactionInfo)),


    TxDetailRowDefinition(
        keyString: "standard_list_item_transaction_details_fee_key",
        title: S.current.transaction_details_fee,
        valueGetter: (vm) => vm.transactionInfo.feeFormatted()!,
        applicable: (vm) =>
            vm.wallet.type != WalletType.nano &&
            (vm.transactionInfo.feeFormatted() ?? "").isNotEmpty),


    TxDetailRowDefinition(
        keyString: "standard_list_item_transaction_confirmations_key",
        title: S.current.confirmations,
        valueGetter: (vm) => "${vm.transactionInfo.confirmations}/${vm.neededConfirmations}",
        applicable: (vm) =>
            [...electrumWalletTypes, ...evmWalletTypes, WalletType.monero]
                .contains(vm.wallet.type) &&
            !isLightning(vm.transactionInfo),
        listItemBuilder: ConfirmationsListItem.new),


    TxDetailRowDefinition(
        keyString: "standard_list_item_transaction_details_recipient_address_key",
        title: S.current.transaction_details_recipient_address,
        valueGetter: (vm) {
          String? ret = null;

          switch (vm.wallet.type) {
            case WalletType.monero:
              if (vm.transactionInfo.direction == TransactionDirection.incoming) {
                ret = monero!.getTransactionAddress(
                    vm.wallet,
                    vm.transactionInfo.additionalInfo['accountIndex'] as int,
                    vm.transactionInfo.additionalInfo['addressIndex'] as int);
              }
            case WalletType.bitcoin:
              ret = (bitcoin!.getTransactionAddresses(vm.wallet, vm.transactionInfo) ?? [])
                      .firstOrNull ??
                  "";
            default:
              break;
          }
          if(ret == null) {
            ret = vm.transactionInfo.to ?? "";
          }
          vm.isRecipientAddressShown = ret.isNotEmpty;
          return ret;
        },
        applicable: (vm) =>
            vm.showRecipientAddress &&
            (vm.transactionInfo.to != null ||
                [WalletType.monero].contains(vm.wallet.type) ||
                vm.wallet.type == WalletType.bitcoin &&
                    vm.transactionInfo.direction == TransactionDirection.incoming),
        listItemBuilder: AddressListItem.new),


    TxDetailRowDefinition(
        keyString: "standard_list_item_transaction_details_source_address_key",
        title: S.current.transaction_details_source_address,
        valueGetter: (vm) => vm.transactionInfo.from!,
        applicable: (vm) => vm.transactionInfo.from != null,
        listItemBuilder: AddressListItem.new),

    TxDetailRowDefinition(
        keyString: "standard_list_item_address_label_key",
        title: S.current.address_label,
        valueGetter: (vm) => monero!.getSubaddressLabel(
            vm.wallet,
            vm.transactionInfo.additionalInfo['accountIndex'] as int,
            vm.transactionInfo.additionalInfo['addressIndex'] as int),
        applicable: (vm) => vm.wallet.type == WalletType.monero),


    TxDetailRowDefinition(
        keyString: "standard_list_item_transaction_key",
        title: S.current.transaction_key,
        valueGetter: (vm) {
          final descriptionKey =
              '${vm.transactionInfo.txHash}_${vm.wallet.walletAddresses.primaryAddress}';

          final description = vm.transactionDescriptionBox.values.firstWhere(
              (val) => val.id == descriptionKey || val.id == vm.transactionInfo.txHash,
              orElse: () => TransactionDescription(id: descriptionKey));
          return vm.transactionInfo.additionalInfo['key'] as String? ??
              description.transactionKey ??
              "";
        },
        applicable: (vm) => vm.wallet.type == WalletType.monero),


    TxDetailRowDefinition(
        keyString: "standard_list_item_transaction_confirmed_key",
        title: S.current.confirmed_tx,
        valueGetter: (vm) => (vm.transactionInfo.confirmations > 0).toString(),
        applicable: (vm) => vm.wallet.type == WalletType.nano),


    TxDetailRowDefinition(
      keyString: "standard_list_item_transaction_details_id_key",
      title: S.current.transaction_details_transaction_id,
      valueGetter: (vm) => vm.transactionInfo.txHash,
    ),
  ];
}

class TransactionDetailsViewModel = TransactionDetailsViewModelBase
    with _$TransactionDetailsViewModel;

abstract class TransactionDetailsViewModelBase with Store {
  TransactionDetailsViewModelBase({
    required this.transactionInfo,
    required this.transactionDescriptionBox,
    required this.wallet,
    required AppStore appStore,
    required this.sendViewModel,
    this.canReplaceByFee = false,
  })  : items = [],
        RBFListItems = [],
        newFee = 0,
        isRecipientAddressShown = false,
        _appStore = appStore,
        showRecipientAddress = appStore.settingsStore.shouldSaveRecipientAddress {
    final tx = transactionInfo;

    for (final def in TxDetailRowDefinition.defs) {
      if (def.applicable(this)) {
        items.add(def.listItemBuilder(
            title: def.title,
            value: def.valueGetter(this),
            key: ValueKey(def.keyString)) as TransactionDetailsListItem);
      }
    }

    _checkForRBF(tx);

    final descriptionKey = '${transactionInfo.txHash}_${wallet.walletAddresses.primaryAddress}';
    final description = transactionDescriptionBox.values.firstWhere(
        (val) => val.id == descriptionKey || val.id == transactionInfo.txHash,
        orElse: () => TransactionDescription(id: descriptionKey));

    if (showRecipientAddress && !isRecipientAddressShown) {
      final recipientAddress = description.recipientAddress;

      if (recipientAddress?.isNotEmpty ?? false) {
        items.add(
          AddressListItem(
            title: S.current.transaction_details_recipient_address,
            value: recipientAddress!,
            key: ValueKey('standard_list_item_${recipientAddress}_key'),
          ),
        );
      }
    }
  }

  void updateNote(String note) {
    final descriptionKey = '${transactionInfo.txHash}_${wallet.walletAddresses.primaryAddress}';
    final description = transactionDescriptionBox.values.firstWhere(
            (val) => val.id == descriptionKey || val.id == transactionInfo.txHash,
        orElse: () => TransactionDescription(id: descriptionKey));

    description.transactionNote = note;

    if (description.isInBox) {
      description.save();
    } else {
      transactionDescriptionBox.add(description);
    }
  }

  String get note {
    final descriptionKey = '${transactionInfo.txHash}_${wallet.walletAddresses.primaryAddress}';
    final description = transactionDescriptionBox.values.firstWhereOrNull(
            (val) => val.id == descriptionKey || val.id == transactionInfo.txHash);
    return description?.transactionNote??"";
  }

  final TransactionInfo transactionInfo;
  final Box<TransactionDescription> transactionDescriptionBox;
  final WalletBase wallet;
  final SendViewModel sendViewModel;
  final AppStore _appStore;

  final List<TransactionDetailsListItem> items;
  final List<TransactionDetailsListItem> RBFListItems;
  bool showRecipientAddress;
  bool isRecipientAddressShown;
  int newFee;
  String? rawTransaction;
  TransactionPriority? transactionPriority;

  CryptoCurrency get transactionAsset {
    if (isEVMCompatibleChain(wallet.type)) {
      return evm!.assetOfTransaction(wallet, transactionInfo);
    }

    return walletTypeToCryptoCurrency(wallet.type);
  }


  // TODO integrate these getters with the TransactionInfo object
  String get formattedPendingStatus {
    switch (wallet.type) {
      case WalletType.monero:
        if (transactionInfo.confirmations >= 0 && transactionInfo.confirmations < 10) {
          return ' (${transactionInfo.confirmations}/10)';
        }
        break;
      case WalletType.wownero:
        if (transactionInfo.confirmations >= 0 && transactionInfo.confirmations < 3) {
          return ' (${transactionInfo.confirmations}/3)';
        }
        break;
      case WalletType.litecoin:
        bool isPegIn = (transactionInfo.additionalInfo["isPegIn"] as bool?) ?? false;
        bool isPegOut = (transactionInfo.additionalInfo["isPegOut"] as bool?) ?? false;
        bool fromPegOut = (transactionInfo.additionalInfo["fromPegOut"] as bool?) ?? false;
        String str = '';
        if (transactionInfo.confirmations <= 0) {
          str = S.current.pending;
        }
        if ((isPegOut || fromPegOut) &&
            transactionInfo.confirmations >= 0 &&
            transactionInfo.confirmations < 6) {
          str = " (${transactionInfo.confirmations}/6)";
        }
        if (isPegIn) {
          str += " (Peg In)";
        }
        if (isPegOut) {
          str += " (Peg Out)";
        }
        return str;
      default:
        return '';
    }

    return '';
  }

  String get formattedStatus {
    if ([
      WalletType.monero,
      WalletType.wownero,
      WalletType.litecoin,
    ].contains(wallet.type)) {
      return formattedPendingStatus;
    }

    return transactionInfo.isPending ? S.current.pending : '';
  }

  int get neededConfirmations {
    switch (wallet.type) {
      case WalletType.monero:
        return 10;
      case WalletType.wownero:
        return 3;
      case WalletType.litecoin:
        bool isPegOut = (transactionInfo.additionalInfo["isPegOut"] as bool?) ?? false;
        bool fromPegOut = (transactionInfo.additionalInfo["fromPegOut"] as bool?) ?? false;
        if(isPegOut || fromPegOut)
          return 6;
      default:
        return 0;
    }
    return 0;
  }



  String get formattedTitle {
    if (transactionInfo.additionalInfo['autoShield'] == true) {
      return "Autoshield";
    }
    if (transactionInfo.direction == TransactionDirection.incoming) {
      return S.current.received;
    }

    return S.current.sent;
  }

  @observable
  bool canReplaceByFee;

  String get _explorerUrl {

    final txId = transactionInfo.txHash;
    if (wallet.chainId != null) {
      final explorerUrl = evm!.getExplorerUrlForChainId(wallet.chainId!);
      if (explorerUrl != null) return '$explorerUrl/tx/${txId}';
    }

    switch (wallet.type) {
      case WalletType.monero:
        return 'https://monero.com/tx/${txId}';
      case WalletType.bitcoin:
        return 'https://mempool.space/${wallet.isTestnet ? "testnet/" : ""}tx/${txId}';
      case WalletType.litecoin:
        return bitcoin!.txIsMweb(transactionInfo)
            ? "https://www.mwebexplorer.com/blocks/block/${transactionInfo.height}"
            : 'https://blockchair.com/litecoin/transaction/${txId}';
      case WalletType.bitcoinCash:
        return 'https://blockchair.com/bitcoin-cash/transaction/${txId}';
      case WalletType.ethereum:
        return 'https://etherscan.io/tx/${txId}';
      case WalletType.base:
        return 'https://basescan.org/tx/${txId}';
      case WalletType.arbitrum:
        return 'https://arbiscan.io/tx/${txId}';
      case WalletType.bsc:
        return 'https://bscscan.com/tx/${txId}';
      case WalletType.polygon:
        return 'https://polygonscan.com/tx/${txId}';
      case WalletType.nano:
        return 'https://nanexplorer.com/nano/block/${txId}';
      case WalletType.banano:
        return 'https://nanexplorer.com/banano/block/${txId}';
      case WalletType.wownero:
        return 'https://explore.wownero.com/tx/${txId}';
      case WalletType.dogecoin:
        return 'https://blockchair.com/dogecoin/transaction/${txId}';
      case WalletType.none:
        return '';
    }
  }

  String get explorerDescription => S.current.view_transaction_on + Uri.parse(_explorerUrl).host;

  void launchExplorer() {
    launchUrl(Uri.parse(_explorerUrl));
  }

  void addBumpFeesListItems(TransactionInfo tx, String rawTransaction) {
    transactionPriority = bitcoin!.getBitcoinTransactionPriorityMedium();
    final inputsCount = (transactionInfo.inputAddresses?.isEmpty ?? true)
        ? 1
        : transactionInfo.inputAddresses!.length;
    final outputsCount = (transactionInfo.outputAddresses?.isEmpty ?? true)
        ? 1
        : transactionInfo.outputAddresses!.length;

    newFee = bitcoin!.getFeeAmountForPriority(
        wallet, bitcoin!.getBitcoinTransactionPriorityMedium(), inputsCount, outputsCount);

    RBFListItems.add(
      StandartListItem(
        title: S.current.old_fee,
        value: tx.feeFormatted() ?? '0.0',
        key: ValueKey('standard_list_item_rbf_old_fee_key'),
      ),
    );

    if (transactionInfo.fee != null && rawTransaction.isNotEmpty) {
      final size = bitcoin!.getTransactionVSize(wallet, rawTransaction);
      final recommendedRate = (transactionInfo.fee! / size).round() + 1;

      RBFListItems.add(
          StandartListItem(title: 'New recommended fee rate', value: '$recommendedRate sat/byte'));
    }

    final priorities = priorityForWalletType(wallet.type);
    final selectedItem = priorities.indexOf(sendViewModel.feesViewModel.transactionPriority);
    final customItem = priorities.firstWhereOrNull(
        (element) => element == sendViewModel.feesViewModel.bitcoinTransactionPriorityCustom);
    final customItemIndex = customItem != null ? priorities.indexOf(customItem) : null;
    final maxCustomFeeRate = sendViewModel.feesViewModel.maxCustomFeeRate?.toDouble();

    RBFListItems.add(
      StandardPickerListItem(
        key: ValueKey('standard_picker_list_item_transaction_priorities_key'),
        title: S.current.estimated_new_fee,
        value: bitcoin!.formatterBitcoinAmountToString(amount: newFee) + ' ${wallet.currency}',
        items: priorityForWalletType(wallet.type),
        customValue: _appStore.settingsStore.customBitcoinFeeRate.toDouble(),
        maxValue: maxCustomFeeRate,
        selectedIdx: selectedItem,
        customItemIndex: customItemIndex ?? 0,
        displayItem: (dynamic priority, double sliderValue) =>
            sendViewModel.feesViewModel.displayFeeRate(priority, sliderValue.round()),
        onSliderChanged: (double newValue) =>
            setNewFee(value: newValue, priority: transactionPriority!),
        onItemSelected: (dynamic item, double sliderValue) {
          transactionPriority = item as TransactionPriority;
          return setNewFee(value: sliderValue, priority: transactionPriority!);
        },
      ),
    );

    if (transactionInfo.inputAddresses != null && transactionInfo.inputAddresses!.isNotEmpty) {
      RBFListItems.add(
        StandardExpandableListItem(
          key: ValueKey('standard_expandable_list_item_transaction_input_addresses_key'),
          title: S.current.inputs,
          expandableItems: transactionInfo.inputAddresses!,
        ),
      );
    }

    if (transactionInfo.outputAddresses != null && transactionInfo.outputAddresses!.isNotEmpty) {
      final outputAddresses = transactionInfo.outputAddresses!.map((element) {
        if (element.contains('OP_RETURN:') && element.length > 40) {
          return element.substring(0, 40) + '...';
        }
        return element;
      }).toList();

      RBFListItems.add(
        StandardExpandableListItem(
          title: S.current.outputs,
          expandableItems: outputAddresses,
          key: ValueKey('standard_expandable_list_item_transaction_output_addresses_key'),
        ),
      );
    }
  }




  @action
  Future<void> _checkForRBF(TransactionInfo tx) async {
    if (wallet.type == WalletType.bitcoin &&
        transactionInfo.direction == TransactionDirection.outgoing) {
      final descriptionKey = '${transactionInfo.txHash}_${wallet.walletAddresses.primaryAddress}';
      final description = transactionDescriptionBox.values
          .firstWhereOrNull((val) => val.id == descriptionKey || val.id == transactionInfo.txHash);

      if (RegExp(AddressValidator.silentPaymentAddressPatternMainnet)
          .hasMatch(description?.recipientAddress ?? "")) {
        canReplaceByFee = false;
        return;
      }

      rawTransaction = await bitcoin!.canReplaceByFee(wallet, tx);
      if (rawTransaction != null) {
        canReplaceByFee = true;
      }
    }
  }

  String setNewFee({double? value, required TransactionPriority priority}) {
    newFee = priority == bitcoin!.getBitcoinTransactionPriorityCustom() && value != null
        ? bitcoin!.feeAmountWithFeeRate(
            wallet,
            value.round(),
            transactionInfo.inputAddresses?.length ?? 1,
            transactionInfo.outputAddresses?.length ?? 1)
        : bitcoin!.getFeeAmountForPriority(
            wallet,
            priority,
            transactionInfo.inputAddresses?.length ?? 1,
            transactionInfo.outputAddresses?.length ?? 1);

    return bitcoin!.formatterBitcoinAmountToString(amount: newFee);
  }

  String get formattedCryptoAmount {
    if (wallet.type == WalletType.bitcoin) {
      final crypto = isLightning(transactionInfo) ? CryptoCurrency.btcln : CryptoCurrency.btc;
      final amount = _appStore.amountParsingProxy
          .getDisplayCryptoString(transactionInfo.amount, crypto)
          .withMaxDecimals(8)
          .withLocalSeperator(_appStore.settingsStore.languageCode);

      return '$amount ${_appStore.amountParsingProxy.getCryptoSymbol(crypto)}';
    }

    return transactionInfo.amountFormatted();
  }

  void replaceByFee(String newFee) => sendViewModel.replaceByFee(transactionInfo, newFee);

  @computed
  String get pendingTransactionFiatAmountValueFormatted => sendViewModel.isFiatDisabled
      ? ''
      : sendViewModel.pendingTransactionFiatAmount + ' ' + sendViewModel.fiat.title;

  @computed
  String get pendingTransactionFeeFiatAmountFormatted => sendViewModel.isFiatDisabled
      ? ''
      : sendViewModel.pendingTransactionFeeFiatAmount + ' ' + sendViewModel.fiat.title;


}