import 'package:cheminova/models/select_task_response.dart';
import 'package:dio/dio.dart';
import 'package:flutter/cupertino.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import '../services/api_client.dart';
import '../services/api_urls.dart';

// Provider class responsible for managing tasks and fetching task data from the API
class SelectTaskProvider extends ChangeNotifier {

  // Constructor that automatically fetches tasks when the provider is initialized
  SelectTaskProvider() {
    getTask(); // Fetch tasks upon provider creation
  }

  final _apiClient = ApiClient(); // API client instance for handling HTTP requests
  List<Tasks> tasksList = []; // List to store tasks fetched from the API

  bool _isLoading = false; // Flag to track the loading state (whether data is being loaded)

  bool get isLoading => _isLoading; // Getter for the loading state

  // Function to set loading state and notify listeners to update UI
  void setLoading(bool loading) {
    _isLoading = loading;
    notifyListeners(); // Notifies listeners that the loading state has changed
  }

  // Function to fetch tasks from the API
  Future<void> getTask() async {
    setLoading(true); // Set loading to true when data fetching starts
    try {
      // Send GET request to the API to retrieve tasks
      Response response = await _apiClient.get(ApiUrls.kycSelectTaskUrl);
      setLoading(false); // Set loading to false after data has been fetched

      // If the response is successful (status code 200), process the data
      if (response.statusCode == 200) {
        // Parse the response data into a SelectTaskKycResponse object
        final data = SelectTaskKycResponse.fromJson(response.data);

        // Filter tasks to include only those that are not completed
        tasksList = data!.tasks!
            .where((element) => element.taskStatus!.toLowerCase() != "completed")
            .toList();
        notifyListeners(); // Notify listeners to update the UI with the new tasks
      }
    } catch (e) {
      setLoading(false); // Set loading to false if an error occurs
      if (kDebugMode) {
        print("Error occurred while fetching tasks: $e"); // Log the error in debug mode
      }
    }
  }
}