import 'package:flutter/material.dart';
import 'package:intl/intl.dart';
import 'package:tm_app/core/utils/result.dart';
import 'package:tm_app/data/repositories/your_tenders_repository.dart';
import 'package:tm_app/data/services/model/tender_approvals_response/tender_approvals_response.dart';

class YourTendersViewModel with ChangeNotifier {
  final YourTendersRepository yourTendersRepository;
  YourTendersViewModel({required this.yourTendersRepository}) {
    getApprovedTenders();
  }

  bool isLoading = false;
  String? errorMessage;
  TenderApprovalsResponse? data;

  // Filter States
  DateTimeRange? selectedDateRange;
  String selectedStatus = 'All';
  final _fmt = DateFormat('yyyy/MM/dd');

  String get startDateFormatted =>
      selectedDateRange?.start != null ? _fmt.format(selectedDateRange!.start) : 'YYYY/MM/DD';

  String get endDateFormatted =>
      selectedDateRange?.end != null ? _fmt.format(selectedDateRange!.end) : 'YYYY/MM/DD';

  Future<void> getApprovedTenders() async {
    isLoading = true;
    notifyListeners();

    final result = await yourTendersRepository.getApprovedTenders();

    switch (result) {
      case Ok<TenderApprovalsResponse>():
        data = result.value;
        errorMessage = null;
        break;
      case Error<TenderApprovalsResponse>():
        errorMessage = result.error.toString();
        break;
    }

    isLoading = false;
    notifyListeners();
  }

  // --- Filter Actions ---
  void setDateRange(DateTimeRange? range) {
    selectedDateRange = range;
    notifyListeners();
  }

  void setStatus(String status) {
    selectedStatus = status;
    notifyListeners();
  }
}