import 'package:flutter/material.dart';
import 'package:pshared/models/asset.dart';

import 'package:uuid/uuid.dart';

import 'package:pshared/models/payment/currency_pair.dart';
import 'package:pshared/models/payment/fx/intent.dart';
import 'package:pshared/models/payment/fx/side.dart';
import 'package:pshared/models/payment/kind.dart';
import 'package:pshared/models/payment/methods/card.dart';
import 'package:pshared/models/payment/methods/managed_wallet.dart';
import 'package:pshared/models/payment/money.dart';
import 'package:pshared/models/payment/settlement_mode.dart';
import 'package:pshared/provider/payment/amount.dart';
import 'package:pshared/api/requests/payment/quote.dart';
import 'package:pshared/data/mapper/payment/intent/payment.dart';
import 'package:pshared/models/payment/intent.dart';
import 'package:pshared/models/payment/quote.dart';
import 'package:pshared/provider/organizations.dart';
import 'package:pshared/provider/resource.dart';
import 'package:pshared/service/payment/quotation.dart';


class QuotationProvider extends ChangeNotifier {
  Resource<PaymentQuote> _quotation = Resource(data: null, isLoading: false, error: null);
  late OrganizationsProvider _organizations;
  bool _isLoaded = false;

  void update(OrganizationsProvider venue, PaymentAmountProvider payment) {
    _organizations = venue;
    getQuotation(PaymentIntent(
      kind: PaymentKind.payout,
      amount: Money(
        amount: payment.amount.toString(), 
        currency: 'USDT',
      ),
      destination: CardPaymentMethod(
        pan: '4000000000000077',
        firstName: 'John',
        lastName: 'Doe',
      ),
      source: ManagedWalletPaymentMethod(
        managedWalletRef: '',
      ),
      fx: FxIntent(
        pair: CurrencyPair(
          base: 'USDT', 
          quote: 'RUB',
        ),
        side: FxSide.sellBaseBuyQuote,
      ),
      settlementMode: payment.payerCoversFee ? SettlementMode.fixReceived : SettlementMode.fixSource,
    ));
  }

  PaymentQuote? get quotation => _quotation.data;

  bool get isReady => _isLoaded && !_quotation.isLoading && _quotation.error == null;

  Asset? get fee => quotation == null ? null : createAsset(quotation!.expectedFeeTotal!.currency, quotation!.expectedFeeTotal!.amount);
  Asset? get total => quotation == null ? null : createAsset(quotation!.debitAmount!.currency, quotation!.debitAmount!.amount);
  Asset? get recipientGets => quotation == null ? null : createAsset(quotation!.expectedSettlementAmount!.currency, quotation!.expectedSettlementAmount!.amount);

  void _setResource(Resource<PaymentQuote> quotation) {
    _quotation = quotation;
    notifyListeners();
  }

  Future<PaymentQuote?> getQuotation(PaymentIntent intent) async {
    if (!_organizations.isOrganizationSet) throw StateError('Organization is not set');
    try {
      _quotation = _quotation.copyWith(isLoading: true, error: null);
      final response = await QuotationService.getQuotation(
        _organizations.current.id, 
        QuotePaymentRequest(
          idempotencyKey: Uuid().v4(),
          intent: intent.toDTO(),
        ),
      );
      _isLoaded = true;
      _setResource(_quotation.copyWith(data: response, isLoading: false, error: null));
    } catch (e) {
      _setResource(_quotation.copyWith(
        data: null,
        error: e is Exception ? e : Exception(e.toString()),
        isLoading: false,
      ));
    }
    notifyListeners();
    return _quotation.data;
  }

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