import 'package:flutter/material.dart';
import 'package:qpay/http/http.dart';
import 'package:qpay/models/pageable_model.dart';

class HistoryModel {
  PageableModel? pageableModel;

  List<Map<String, dynamic>> transactions = [];
  bool isLoading = false;
  String? errorMessage;
}

class HistoryController extends ChangeNotifier {
  final HistoryModel model = HistoryModel();
  final Http http = Http();
  BuildContext context;

  HistoryController(this.context);

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

  Future<void> getTransactions(Map<String, String> params) async {
    model.isLoading = true;
    if (params['page'] == '0') {
      model.transactions = getFakeTransactions();
    }
    notifyListeners();

    try {
      params['type'] = 'REQUEST';
      Map<String, dynamic> response = await http.get(
        '/transaction?${buildQueryParameters(params)}',
      );

      if (params['page'] == '0') {
        model.transactions = [];
      }

      model.pageableModel = PageableModel.fromJson(response);

      // pagination adds to current list instead of replacing it
      model.transactions =
          model.transactions +
          model.pageableModel!.content
              .map((e) => e as Map<String, dynamic>)
              .toList();
    } catch (e) {
      logger.e(e);
      _showErrorSnackBar(
        "Problem fetching transactions, are you connected to the internet?",
      );
      model.errorMessage = e.toString();
      model.transactions = [];
    } finally {
      model.isLoading = false;
      notifyListeners();
    }
  }

  String buildQueryParameters(Map<String, String> params) {
    if (params.isEmpty) {
      return '';
    }

    String query = '';
    params.forEach((key, value) {
      query += '$key=$value&';
    });
    return query.substring(0, query.length - 1);
  }

  List<Map<String, dynamic>> getFakeTransactions() {
    return [
      {
        "id": "77b2c479-b803-49fc-b5c3-acbf52cba633",
        "trace": "22a3044b-8f53-4e43-b4f5-c77dcec48d2d",
        "amount": 25.0,
        "charge": 0.0,
        "gatewayCharge": 0.25,
        "tax": 0.5,
        "totalAmount": 25.75,
        "reference": "c838136c-c015-4a0b-9c7c-52f127c8c109",
        "paymentProcessorLabel": "MPGS",
        "paymentProcessorImage": "visa-mastercard.png",
        "debitPhone": "",
        "debitAccount": "",
        "debitCurrency": "USD",
        "debitRef": "peak",
        "creditPhone": "",
        "creditAccount": "07088597534",
        "billClientId": "powertel_zesa",
        "billName": "Zesa",
        "type": "REQUEST",
        "authType": "WEB",
        "errorMessage": "",
        "responseCode": "00",
        "status": "SUCCESS",
        "sdkActionId": "0aa0d90d-6132-48a7-a5d8-e796f757c73f",
      },
    ];
  }
}