import 'dart:developer';

import 'package:flutter/cupertino.dart';
import 'package:mc_common_app/config/routes.dart';
import 'package:mc_common_app/extensions/string_extensions.dart';
import 'package:mc_common_app/generated/locale_keys.g.dart';
import 'package:mc_common_app/repositories/payments_repo.dart';
import 'package:mc_common_app/services/payments_service.dart';
import 'package:mc_common_app/utils/enums.dart';
import 'package:mc_common_app/utils/utils.dart';
import 'package:mc_common_app/view_models/ad_view_model.dart';
import 'package:provider/provider.dart';
import 'package:easy_localization/easy_localization.dart';

class PaymentVM extends ChangeNotifier {
  final PaymentService paymentService;
  final PaymentsRepo paymentRepo;

  PaymentVM({required this.paymentService, required this.paymentRepo});

  PaymentMethods selectedPaymentMethod = PaymentMethods.mada;
  PaymentTypes currentPaymentType = PaymentTypes.ads;

  // Store AdVM reference for updating local state after payment
  AdVM? _cachedAdVM;

  int currentAdId = -1;

  void updateCurrentAdId({required int id}) {
    currentAdId = id;
  }

  int requestId = -1;

  void updateRequestId({required int id}) {
    requestId = id;
  }

  int orderProviderSubscriptionId = -1;

  void updateOrderProviderSubscriptionId({required int id}) {
    orderProviderSubscriptionId = id;
  }

  List<int> appointmentIdsForPayment = [];

  void updateAppointmentIdsForPayment({required List<int> ids}) {
    appointmentIdsForPayment = ids;
    log("appointmentIdsForPayment: ${appointmentIdsForPayment}");
  }

  updateSelectedPaymentMethod(PaymentMethods selectedMethod) {
    selectedPaymentMethod = selectedMethod;
    notifyListeners();
  }

  Future<void> onContinuePressed(BuildContext context, {required PaymentTypes paymentType}) async {
    // Cache AdVM reference for updating local state after payment
    try {
      _cachedAdVM = context.read<AdVM>();
    } catch (e) {
      log("Could not get AdVM reference: $e");
    }

    switch (selectedPaymentMethod) {
      case PaymentMethods.mada:
        break;
      case PaymentMethods.visa:
        await onVisaCardSelected(context, paymentType);
        break;
      case PaymentMethods.applePay:
        break;
      case PaymentMethods.masterCard:
        break;
      case PaymentMethods.tamara:
        break;
    }

    return;
  }

  Future<void> verifyPayments({
    required BuildContext context,
    required int id,
    List<int>? appointmentIds,
    required int paymentTypeId,
    required Function() onVerified,
    bool isForAppointment = false,
  }) async {
    try {
      // Utils.showLoading(context); // Commented out: causes BuildContext error after screen is popped
      bool isPaid = await paymentRepo.verifyPayment(
        paymentTypeId: paymentTypeId,
        id: id,
        isForAppointments: isForAppointment,
        appointmentIds: appointmentIds,
      );
      // Utils.hideLoading(context); // Commented out: matching pair with showLoading

      log("isPaid: $isPaid");

      if (!isPaid) {
        // Utils.showToast(LocaleKeys.paymentFailed.tr());
        // pop(context);
        return;
      } else {
        Utils.showToast(LocaleKeys.paymentSuccessful.tr());
      }

      // Call onVerified callback - success methods handle their own context checks
      onVerified();
    } catch (e) {
      log("verifyPayments error: ${e.toString()}");
      Utils.showToast(e.toString());
      return;
    }
  }

  int getIdTypeByPaymentType(PaymentTypes paymentTypes) {
    switch (paymentTypes) {
      case PaymentTypes.subscription:
        return orderProviderSubscriptionId;
      case PaymentTypes.appointment:
      case PaymentTypes.partialAppointment:
        return -1;
      case PaymentTypes.request:
        return requestId;
      case PaymentTypes.adReserve:
      case PaymentTypes.ads:
      case PaymentTypes.extendAds:
        return currentAdId;
    }
  }

  Future<void> placeThePayment({required PaymentTypes paymentTypeEnum, required BuildContext context, Function()? onExit}) async {
    await paymentService.placePayment(
      id: getIdTypeByPaymentType(paymentTypeEnum),
      // This will be request ID for request payment || ad ID for Ad Related Payment || OrderProviderSubscriptionID for SubscriptionPayment
      appointmentIds: appointmentIdsForPayment,
      paymentType: paymentTypeEnum,
      onExit: onExit,
      onFailure: () {
        Utils.showToast(LocaleKeys.paymentFailed.tr());
        switch (paymentTypeEnum) {
          case PaymentTypes.subscription:
          case PaymentTypes.appointment:
          case PaymentTypes.adReserve:
          case PaymentTypes.ads:
          case PaymentTypes.request:
          case PaymentTypes.extendAds:
          case PaymentTypes.partialAppointment:
            break;
        }
      },
      onSuccess: () async {
        // Utils.showToast("Verifying Payment..");

        switch (paymentTypeEnum) {
          case PaymentTypes.subscription:
            await verifyPayments(
              context: context,
              paymentTypeId: paymentTypeEnum.getIdFromPaymentTypesEnum(),
              id: orderProviderSubscriptionId,
              onVerified: () => onSubscriptionPaymentSuccess(),
            );
            break;

          case PaymentTypes.appointment:
          case PaymentTypes.partialAppointment:
            await verifyPayments(
              id: 0,
              isForAppointment: true,
              appointmentIds: appointmentIdsForPayment,
              context: context,
              paymentTypeId: paymentTypeEnum.getIdFromPaymentTypesEnum(),
              onVerified: () => onAppointmentSuccess(context),
            );
            break;

          case PaymentTypes.request:
            await verifyPayments(
              context: context,
              paymentTypeId: paymentTypeEnum.getIdFromPaymentTypesEnum(),
              id: requestId,
              onVerified: () => onRequestPaymentSuccess(context),
            );
            break;

          case PaymentTypes.adReserve:
            await verifyPayments(
              context: context,
              paymentTypeId: paymentTypeEnum.getIdFromPaymentTypesEnum(),
              id: currentAdId,
              onVerified: () => onAdReservePaymentSuccess(context),
            );
            break;

          case PaymentTypes.ads:
          case PaymentTypes.extendAds:
            await verifyPayments(
              context: context,
              paymentTypeId: paymentTypeEnum.getIdFromPaymentTypesEnum(),
              id: currentAdId,
              onVerified: () => onAdsPaymentSuccess(context),
            );
        }
      },
    );
  }

  void onRequestPaymentSuccess(BuildContext context) {
    log("🔵 onRequestPaymentSuccess called");

    // Wait a bit for browser to close and context to be ready
    Future.delayed(const Duration(milliseconds: 500), () {
      log("Attempting navigation after delay...");
      final nav = navigatorKey.currentState;
      if (nav == null) {
        log("❌ navigatorKey.currentState is still null after delay");
        return;
      }

      nav.pushNamedAndRemoveUntil(
        AppRoutes.dashboard,
        (route) => false,
        arguments: DashboardRouteEnum.fromRequestPayment,
      );

      log("✅ Navigation executed successfully");
    });
  }

  void onAdsPaymentSuccess(BuildContext context) {
    log("🔵 onAdsPaymentSuccess called");

    // Update local ad state immediately so UI reflects payment success
    if (_cachedAdVM != null && currentAdId != -1) {
      try {
        // Find and update the ad in myAds list
        var adIndex = _cachedAdVM!.myAds.indexWhere((ad) => ad.id == currentAdId);
        if (adIndex != -1) {
          _cachedAdVM!.myAds[adIndex].adPostStatus = AdPostStatus.active;
          _cachedAdVM!.notifyListeners();
          log("✅ Local ad state updated - status changed to active");
        } else {
          log("⚠️ Ad not found in myAds list");
        }
      } catch (e) {
        log("⚠️ Could not update local ad state: $e");
      }
    }

    // Wait a bit for browser to close and context to be ready
    Future.delayed(const Duration(milliseconds: 500), () {
      log("Attempting navigation after delay...");
      final nav = navigatorKey.currentState;
      if (nav == null) {
        log("❌ navigatorKey.currentState is still null after delay");
        return;
      }

      nav.pushNamedAndRemoveUntil(
        AppRoutes.dashboard,
        (route) => false,
        arguments: DashboardRouteEnum.fromAdsPayment,
      );

      log("✅ Navigation executed successfully");
    });
  }

  void onAdReservePaymentSuccess(BuildContext context) {
    log("🔵 onAdReservePaymentSuccess called");

    // Wait a bit for browser to close and context to be ready
    Future.delayed(const Duration(milliseconds: 500), () {
      log("Attempting navigation after delay...");
      final nav = navigatorKey.currentState;
      if (nav == null) {
        log("❌ navigatorKey.currentState is still null after delay");
        return;
      }

      nav.pushNamedAndRemoveUntil(
        AppRoutes.dashboard,
        (route) => false,
        arguments: DashboardRouteEnum.fromReserveAdsPayment,
      );

      log("✅ Navigation executed successfully");
    });
  }

  void onSubscriptionPaymentSuccess() {
    log("🔵 onSubscriptionPaymentSuccess called");

    // Wait a bit for browser to close and context to be ready
    Future.delayed(const Duration(milliseconds: 500), () {
      log("Attempting navigation after delay...");
      final nav = navigatorKey.currentState;
      if (nav == null) {
        log("❌ navigatorKey.currentState is still null after delay");
        return;
      }

      nav.pushNamedAndRemoveUntil(
        AppRoutes.dashboard,
        (route) => false,
      );

      log("✅ Navigation executed successfully");
    });
  }

  void onAppointmentSuccess(BuildContext context) {
    log("🔵 onAppointmentSuccess called");

    // Wait a bit for browser to close and context to be ready
    Future.delayed(const Duration(milliseconds: 500), () {
      log("Attempting navigation after delay...");
      final nav = navigatorKey.currentState;
      if (nav == null) {
        log("❌ navigatorKey.currentState is still null after delay");
        return;
      }

      nav.pushNamedAndRemoveUntil(
        AppRoutes.dashboard,
        (route) => false,
        arguments: DashboardRouteEnum.fromAppointmentPayment,
      );

      log("✅ Navigation executed successfully");
    });
  }

  Future<void> onVisaCardSelected(BuildContext context, PaymentTypes paymentType, {Function()? onExit}) async {
    currentPaymentType = paymentType;
    switch (currentPaymentType) {
      case PaymentTypes.appointment:
      case PaymentTypes.partialAppointment:
        if (appointmentIdsForPayment.isEmpty) return;
        await placeThePayment(context: context, paymentTypeEnum: paymentType, onExit: onExit);
        break;
      case PaymentTypes.request:
        if (requestId == -1) return;
        await placeThePayment(context: context, paymentTypeEnum: paymentType, onExit: onExit);
        break;
      case PaymentTypes.subscription:
        await placeThePayment(context: context, paymentTypeEnum: paymentType, onExit: onExit);
        break;
      case PaymentTypes.ads:
      case PaymentTypes.adReserve:
      case PaymentTypes.extendAds:
        if (currentAdId == -1) return;
        await placeThePayment(context: context, paymentTypeEnum: paymentType, onExit: onExit);
        break;
    }
  }
}