tm_app/lib/view_models/tenders_view_model.dart

import 'package:flutter/material.dart';
import 'package:tm_app/data/repositories/tenders_repository.dart';
import 'package:tm_app/data/services/model/feedback_data/feedback_data.dart';
import 'package:tm_app/data/services/model/feedback_response/feedback_response.dart';
import 'package:tm_app/data/services/model/tenders/tenders_response/tenders_response.dart';

import '../core/utils/result.dart';

class TendersViewModel with ChangeNotifier {
  final TendersRepository _tendersRepository;

  TendersViewModel({required TendersRepository tendersRepository})
    : _tendersRepository = tendersRepository {
    WidgetsBinding.instance.addPostFrameCallback((_) {
      getTenders();
    });
  }

  bool _isLoading = false;
  String? _errorMessage;
  TendersResponse? _tendersResponse;
  FeedbackData? _feedbackData;

  bool get isLoading => _isLoading;
  String? get errorMessage => _errorMessage;
  TendersResponse? get tendersResponse => _tendersResponse;
  FeedbackData? get feedbackData => _feedbackData;

  List<FeedbackData> feedbacks = [];

  int currentPage = 1;

  /// Get feedback for a specific tender
  FeedbackData? getFeedbackForTender(String tenderId) {
    try {
      return feedbacks.firstWhere((f) => f.tender == tenderId);
    } on Exception {
      return null;
    }
  }

  /// Check if feedback exists for a specific tender
  bool hasFeedbackForTender(String tenderId) {
    return feedbacks.any((f) => f.tender == tenderId);
  }

  Future<void> getTenders() async {
    _isLoading = true;
    _errorMessage = null;
    notifyListeners();

    final result = await _tendersRepository.getTenders();
    switch (result) {
      case Ok<TendersResponse>():
        _tendersResponse = result.value;
        getTenderFeedback(_tendersResponse!.data!.tenders!.first.id!);
        break;
      case Error<TendersResponse>():
        _errorMessage = result.error.toString();
        break;
    }
    _isLoading = false;
    notifyListeners();
    _errorMessage = null;
    notifyListeners();
  }

  Future<void> getTenderFeedback(String tenderId) async {
    // _isLoading = true;
    _errorMessage = null;
    notifyListeners();

    final result = await _tendersRepository.getTenderFeedback(
      tenderId: tenderId,
    );
    switch (result) {
      case Ok<FeedbackResponse>():
        _feedbackData = result.value.data;
        // Add or update _feedbackData in feedbacks list by tender id
        _addOrUpdateFunction(_feedbackData!);
        break;
      case Error<FeedbackResponse>():
        _errorMessage = result.error.toString();
        break;
    }
    // _isLoading = false;
    notifyListeners();
    _errorMessage = null;
    notifyListeners();
  }

  Future<void> feedback({
    required String tenderId,
    required String feedbackType,
  }) async {
    _errorMessage = null;
    notifyListeners();

    final result = await _tendersRepository.feedback(
      tenderId: tenderId,
      feedbackType: feedbackType,
    );
    switch (result) {
      case Ok<FeedbackResponse>():
        _feedbackData = result.value.data;
        if (_feedbackData != null) {
          _addOrUpdateFunction(_feedbackData!);
        }

        break;
      case Error<FeedbackResponse>():
        _errorMessage = result.error.toString();
        break;
    }
    notifyListeners();
    _errorMessage = null;
    notifyListeners();
  }

  void _addOrUpdateFunction(FeedbackData feedbackData) {
    final index = feedbacks.indexWhere((f) => f.tender == feedbackData.tender);
    if (index != -1) {
      feedbacks[index] = feedbackData;
    } else {
      feedbacks.add(feedbackData);
    }
  }
}