import 'package:flutter/material.dart';
import 'package:go_router/go_router.dart';
import 'package:shared_preferences/shared_preferences.dart';
import 'package:provider/provider.dart';
import 'package:qpay/http/http.dart';
import 'package:qpay/screens/pay/pay_controller.dart' as pc;
import 'package:qpay/screens/transaction_controller.dart' as tc;
import 'package:qpay/screens/home/home_controller.dart' as hc;

class ReceiptModel {
  Map<String, dynamic>? receiptData;
  bool isLoading = false;
  String? errorMessage;
}

class ReceiptController extends ChangeNotifier {
  final ReceiptModel model = ReceiptModel();
  final Http http = Http();
  late tc.TransactionController transactionController;
  late SharedPreferences prefs;

  BuildContext context;

  ReceiptController(this.context) {
    transactionController = Provider.of<tc.TransactionController>(
      context,
      listen: false,
    );
  }

  void _showErrorSnackBar(String? message) {
    WidgetsBinding.instance.addPostFrameCallback((_) {
      ScaffoldMessenger.of(context).showSnackBar(
        SnackBar(
          content: Text(message.toString()),
          behavior: SnackBarBehavior.floating,
          backgroundColor: Colors.deepOrange,
        ),
      );
    });
  }

  void setLoading(bool value) {
    model.isLoading = value;
    notifyListeners();
  }

  Future<void> repeatTransaction(BuildContext context) async {
    setLoading(true);
    // fetch provider & update tran controller
    String providerId = model.receiptData?['billClientId'] ?? '';
    Map<String, dynamic> provider = await http.get(
      '/public/providers/client/$providerId',
    );
    transactionController.model.selectedProvider = hc.BillProvider.fromJson(
      provider,
    );

    // update tran controller formdata with credit account, email, name, phone & providerLabel
    transactionController.model.formData = transactionController.model.formData
        .copyWith(
          creditAccount: model.receiptData?['creditAccount'] ?? '',
          creditPhone: model.receiptData?['creditPhone'] ?? '',
          creditName: model.receiptData?['creditName'] ?? '',
          creditEmail: model.receiptData?['creditEmail'] ?? '',
        );

    // fetch product and update tran controller formdata
    String providerUid =
        transactionController.model.selectedProvider?.uid ?? '';
    String productUid = model.receiptData?['productUid'] ?? '';

    if (productUid.isNotEmpty) {
      Map<String, dynamic> product = await http.get(
        '/public/providers/$providerUid/products/$productUid',
      );
      transactionController.model.selectedProduct = pc.BillProduct.fromJson(
        product,
      );
    }

    // update credit amount, notification phone number, payment processor
    transactionController
        .model
        .formData = transactionController.model.formData.copyWith(
      amount: model.receiptData?['amount'].toStringAsFixed(2) ?? '',
      creditPhone: model.receiptData?['creditPhone'] ?? '',
      paymentProcessorLabel: model.receiptData?['paymentProcessorLabel'] ?? '',
      paymentProcessorName: model.receiptData?['paymentProcessorName'] ?? '',
      id: null
    );

    setLoading(false);
    context.push('/make-payment');
  }

  Future<void> getReceiptData(String id) async {
    setLoading(true);
    try {
      Map<String, dynamic> response = await http.get('/public/transaction/$id');
      model.receiptData = response;
    } catch (e) {
      _showErrorSnackBar(
        "Problem fetching transaction data, are you connected to the internet?",
      );
    } finally {
      setLoading(false);
    }
  }

  void updateReceiptData(Map<String, dynamic> data) {
    model.receiptData = data;
    notifyListeners();
  }
}