import 'package:flutter/foundation.dart';

import 'package:pshared/provider/payment/multiple/quotation.dart';

import 'package:pweb/providers/quotation/auto_refresh.dart';


class MultiQuotationController extends ChangeNotifier {
  static const Duration _autoRefreshLead = Duration(seconds: 5);

  MultiQuotationProvider? _quotation;
  final QuotationAutoRefreshController _autoRefreshController =
      QuotationAutoRefreshController();

  void update(MultiQuotationProvider quotation) {
    if (identical(_quotation, quotation)) return;
    _quotation?.removeListener(_handleQuotationChanged);
    _quotation = quotation;
    _quotation?.addListener(_handleQuotationChanged);
    _handleQuotationChanged();
  }

  bool get isLoading => _quotation?.isLoading ?? false;
  Exception? get error => _quotation?.error;
  bool get canRefresh => _quotation?.canRefresh ?? false;
  bool get isReady => _quotation?.isReady ?? false;

  DateTime? get quoteExpiresAt => _quotation?.quoteExpiresAt;

  void refreshQuotation() {
    _quotation?.refreshQuotation();
  }

  void _handleQuotationChanged() {
    _syncAutoRefresh();
    notifyListeners();
  }

  void _syncAutoRefresh() {
    final quotation = _quotation;
    if (quotation == null) {
      _autoRefreshController.reset();
      return;
    }

    final expiresAt = quoteExpiresAt;
    final scheduledAt = expiresAt == null
        ? null
        : expiresAt.subtract(_autoRefreshLead);

    _autoRefreshController.setEnabled(true);
    _autoRefreshController.sync(
      isLoading: quotation.isLoading,
      canRefresh: quotation.canRefresh,
      expiresAt: scheduledAt,
      onRefresh: _refreshQuotation,
    );
  }

  Future<void> _refreshQuotation() async {
    await _quotation?.refreshQuotation();
  }

  @override
  void dispose() {
    _quotation?.removeListener(_handleQuotationChanged);
    _autoRefreshController.dispose();
    super.dispose();
  }
}