import 'package:flutter/material.dart';

import 'package:collection/collection.dart';
import 'package:pshared/models/payment/methods/data.dart';

import 'package:pshared/models/payment/methods/type.dart';
import 'package:pshared/models/payment/type.dart';
import 'package:pshared/models/recipient/recipient.dart';
import 'package:pshared/provider/recipient/pmethods.dart';
import 'package:pshared/provider/recipient/provider.dart';

import 'package:pweb/models/wallet.dart';
import 'package:pweb/providers/wallets.dart';
//import 'package:pweb/services/amplitude.dart';
import 'package:pweb/app/router/payout_routes.dart';
import 'package:pweb/widgets/sidebar/destinations.dart';


class PageSelectorProvider extends ChangeNotifier {
  PayoutDestination _selected = PayoutDestination.dashboard;
  PaymentType? _type;
  bool _cameFromRecipientList = false;
  PayoutDestination? _previousDestination;

  late RecipientsProvider recipientProvider;
  late WalletsProvider walletsProvider;
  late PaymentMethodsProvider methodsProvider;

  PayoutDestination get selected => _selected;
  PaymentType? get type => _type;
  bool get cameFromRecipientList => _cameFromRecipientList;

  PageSelectorProvider();

  void update(
    RecipientsProvider recipientProv,
    WalletsProvider walletsProv,
    PaymentMethodsProvider methodsProv,
  ) {
    recipientProvider = recipientProv;
    walletsProvider = walletsProv;
    methodsProvider = methodsProv;
  }

  void syncDestination(PayoutDestination destination) {
    if (_selected == destination) return;
    _selected = destination;
    notifyListeners();
  }

  void selectPage(
    BuildContext context,
    PayoutDestination dest, {
    bool replace = true,
  }) {
    _selected = dest;
    notifyListeners();
    _navigateTo(context, dest, replace: replace);
  }

  void selectRecipient(
    BuildContext context,
    Recipient? recipient, {
    bool fromList = false,
  }) {
    final previousDestination = _selected;
    recipientProvider.setCurrentObject(recipient?.id);
    _cameFromRecipientList = fromList;
    _setPreviousDestination();
    _selected = PayoutDestination.payment;
    notifyListeners();
    if (previousDestination != PayoutDestination.payment) {
      _navigateTo(context, PayoutDestination.payment, replace: false);
    }
  }

  void editRecipient(
    BuildContext context,
    Recipient? recipient, {
    bool fromList = false,
  }) {
    final previousDestination = _selected;
    recipientProvider.setCurrentObject(recipient?.id);
    _cameFromRecipientList = fromList;
    _selected = PayoutDestination.addrecipient;
    notifyListeners();
    if (previousDestination != PayoutDestination.addrecipient) {
      _navigateTo(context, PayoutDestination.addrecipient, replace: false);
    }
  }

  void goToAddRecipient(BuildContext context) {
    // AmplitudeService.recipientAddStarted();
    final previousDestination = _selected;
    recipientProvider.setCurrentObject(null);
    _selected = PayoutDestination.addrecipient;
    _cameFromRecipientList = false;
    notifyListeners();
    if (previousDestination != PayoutDestination.addrecipient) {
      _navigateTo(context, PayoutDestination.addrecipient, replace: false);
    }
  }

  void startPaymentWithoutRecipient(
    BuildContext context,
    PaymentType type,
  ) {
    final previousDestination = _selected;
    recipientProvider.setCurrentObject(null);
    _type = type;
    _cameFromRecipientList = false;
    _setPreviousDestination();
    _selected = PayoutDestination.payment;
    notifyListeners();
    if (previousDestination != PayoutDestination.payment) {
      _navigateTo(context, PayoutDestination.payment, replace: false);
    }
  }

  void goBackFromPayment(BuildContext context) {
    if (Navigator.of(context).canPop()) {
      Navigator.of(context).pop();
    } else {
      _navigateTo(
        context,
        _previousDestination ??
            (_cameFromRecipientList
                ? PayoutDestination.recipients
                : PayoutDestination.dashboard),
      );
    }
    _selected = _previousDestination ??
        (_cameFromRecipientList
            ? PayoutDestination.recipients
            : PayoutDestination.dashboard);
    _type = null;
    _previousDestination = null;
    _cameFromRecipientList = false;
    notifyListeners();
  }

  void goBackFromWalletEdit(BuildContext context) {
    selectPage(context, PayoutDestination.methods);
  }

  void selectWallet(BuildContext context, Wallet wallet) {
    final previousDestination = _selected;
    walletsProvider.selectWallet(wallet);
    _selected = PayoutDestination.editwallet;
    notifyListeners();
    if (previousDestination != PayoutDestination.editwallet) {
      _navigateTo(context, PayoutDestination.editwallet, replace: false);
    }
  }

  void startPaymentFromWallet(BuildContext context, Wallet wallet) {
    final previousDestination = _selected;
    _type = PaymentType.wallet;
    _cameFromRecipientList = false;
    _setPreviousDestination();
    _selected = PayoutDestination.payment;
    notifyListeners();
    if (previousDestination != PayoutDestination.payment) {
      _navigateTo(context, PayoutDestination.payment, replace: false);
    }
  }

  void openWalletTopUp(BuildContext context, Wallet wallet) {
    final previousDestination = _selected;
    _setPreviousDestination();
    walletsProvider.selectWallet(wallet);
    _selected = PayoutDestination.walletTopUp;
    notifyListeners();
    if (previousDestination != PayoutDestination.walletTopUp) {
      _navigateTo(context, PayoutDestination.walletTopUp, replace: false);
    }
  }

  void goBackFromWalletTopUp(BuildContext context) {
    if (Navigator.of(context).canPop()) {
      Navigator.of(context).pop();
    } else {
      _navigateTo(
        context,
        _previousDestination ?? PayoutDestination.dashboard,
      );
    }
    _selected = _previousDestination ?? PayoutDestination.dashboard;
    _previousDestination = null;
    notifyListeners();
  }

  PaymentMethod? getPaymentMethodForWallet(Wallet wallet) {
    if (methodsProvider.methods.isEmpty) {
      return null;
    }
    
    return methodsProvider.methods.firstWhereOrNull(
      (method) => method.type == PaymentType.wallet && (method.description?.contains(wallet.walletUserID) ?? false),
    );
  }

  MethodMap getAvailablePaymentTypes() {
    final recipient = selectedRecipient;
    if ((recipient == null) || !methodsProvider.isReady) return {};

    final methodsForRecipient = methodsProvider.methods.where(
      (method) => !method.isArchived && method.recipientRef == recipient.id,
    );

    return {
      for (final method in methodsForRecipient) method.type: method.data,
    };
  }

  PaymentType getDefaultPaymentType() {
    final availableTypes = getAvailablePaymentTypes();
    final currentType = _type ?? PaymentType.bankAccount;
    
    if (availableTypes.containsKey(currentType)) {
      return currentType;
    }
    if (availableTypes.isNotEmpty) {
      return availableTypes.keys.first;
    }
    return PaymentType.bankAccount;
  }

  bool shouldShowPaymentForm() {
    return selectedRecipient == null;
  }

  void handleWalletAutoSelection() {
    if (selectedWallet != null) {
      final wallet = selectedWallet!;
      final matchingMethod = getPaymentMethodForWallet(wallet);
      if (matchingMethod != null) {
        methodsProvider.setCurrentObject(matchingMethod.id);
      }
    }
  }

  void _setPreviousDestination() {
    if (_selected != PayoutDestination.payment &&
        _selected != PayoutDestination.walletTopUp) {
      _previousDestination = _selected;
    }
  }

  void _navigateTo(
    BuildContext context,
    PayoutDestination destination, {
    bool replace = true,
  }) {
    if (replace) {
      context.goToPayout(destination);
    } else {
      context.pushToPayout(destination);
    }
  }

  Recipient? get selectedRecipient => recipientProvider.currentObject;
  Wallet? get selectedWallet => walletsProvider.selectedWallet;
}