import 'package:flutter/foundation.dart';

import 'package:pshared/models/payment/payment.dart';
import 'package:pshared/provider/organizations.dart';
import 'package:pshared/provider/payment/quotation.dart';
import 'package:pshared/provider/resource.dart';
import 'package:pshared/service/payment/service.dart';


class PaymentProvider extends ChangeNotifier {
  late OrganizationsProvider _organization;
  late QuotationProvider _quotation;

  Resource<Payment> _payment = Resource(data: null, isLoading: false, error: null);
  bool _isLoaded = false;

  void update(OrganizationsProvider organization, QuotationProvider quotation) {
    _quotation = quotation;
    _organization = organization;
  }

  Payment? get payment => _payment.data;
  bool get isLoading => _payment.isLoading;
  Exception? get error => _payment.error;
  bool get isReady => _isLoaded && !_payment.isLoading && _payment.error == null;

  void _setResource(Resource<Payment> payment) {
    _payment = payment;
    notifyListeners();
  }

  Future<Payment?> pay({String? idempotencyKey, Map<String, String>? metadata}) async {
    if (!_organization.isOrganizationSet) throw StateError('Organization is not set');
    if (!_quotation.isReady) throw StateError('Quotation is not ready');
    final quoteRef = _quotation.quotation?.quoteRef;
    if (quoteRef == null || quoteRef.isEmpty) {
      throw StateError('Quotation reference is not set');
    }

    _setResource(_payment.copyWith(isLoading: true, error: null));
    try {
      final response = await PaymentService.pay(
        _organization.current.id,
        quoteRef,
        idempotencyKey: idempotencyKey,
        metadata: metadata,
      );
      _isLoaded = true;
      _setResource(_payment.copyWith(data: response, isLoading: false, error: null));
    } catch (e) {
      _setResource(_payment.copyWith(
        data: null,
        error: e is Exception ? e : Exception(e.toString()),
        isLoading: false,
      ));
    }
    return _payment.data;
  }

  void reset() {
    _setResource(Resource(data: null, isLoading: false, error: null));
    _isLoaded = false;
  }
}