tm-android-app/lib/provider/add_sales_provider.dart

import 'dart:convert';

import 'package:cheminova/constants/constant.dart';
import 'package:cheminova/models/sales_task_response.dart';
import 'package:cheminova/screens/data_submit_successfull.dart';
import 'package:cheminova/services/api_client.dart';
import 'package:cheminova/services/api_urls.dart';
import 'package:dio/dio.dart';
import 'package:flutter/material.dart';

class AddSalesProvider with ChangeNotifier {
  final _apiClient = ApiClient();
  List<SalesProduct> tasksList = [];
  List<SalesProduct> searchList = [];

  bool _isLoading = false;

  bool get isLoading => _isLoading;

  List<SalesProduct> selectedProducts = [];

  void setLoading(bool loading) {
    _isLoading = loading;
    notifyListeners();
  }

  // Future<void> getTask() async {
  //   setLoading(true);
  //   try {
  //     Response response = await _apiClient.get(ApiUrls.salesTaskUrl);
  //     setLoading(false);
  //     if (response.statusCode == 200) {
  //       final data = SalesTaskResponse.fromJson(response.data);
  //       tasksList = data.products ?? [];
  //       notifyListeners();
  //     }
  //   } catch (e) {
  //     String error = "Something went wrong";
  //     if (e is DioException) {
  //       error = e.response!.data['message'] ?? "Something went wrong";
  //     }
  //     ScaffoldMessenger.of(
  //       navigatorKey.currentContext!,
  //     ).showSnackBar(
  //       SnackBar(
  //         content: Text(
  //           error,
  //         ),
  //       ),
  //     );
  //     setLoading(false);
  //   }
  // }


  Future<void> getTask() async {
    bool moreDataAvailable = true;
    int page = 1;

    // Loop to fetch all pages
    while (moreDataAvailable) {
      Response response = await _apiClient.get(
          '${ApiUrls.salesTaskUrl}?page=$page');
      if (response.statusCode == 200) {
        // productResponse = ProductResponse.fromJson(response.data);
        final data = SalesTaskResponse.fromJson(response.data);
        tasksList.addAll(data.products ?? []); // Add new products to the list
        moreDataAvailable = data.totalPages! > page;
        page++;
        notifyListeners(); // Notify listeners to update the UI with the new product list
      }
    }
  }


  void filterProducts(String val) {
    tasksList = tasksList.where((element) {
      final productNameLower = element.ProductName!.toLowerCase();
      final productSkuLower = element.SKU!.toLowerCase();
      final searchLower = val.toLowerCase();
      return productNameLower.contains(searchLower) ||
          productSkuLower.contains(searchLower);
    }).toList();
    notifyListeners();
  }

  Future<void> submitProducts(
      {required String distributorType,
      required String pdRdId,
      required String date,
      String? inventoryId,
      required String tradeName}) async {
    setLoading(true);
    try {
      Response response = await _apiClient.post(ApiUrls.postSalesTaskUrl,
          data: json.encode({
            "addedFor": distributorType.replaceAll(' ', ''),
            "addedForId": pdRdId,
            "tradename": tradeName,
            "date": date,
            "products": selectedProducts.map((product) {
              return {
                "SKU": product.SKU,
                "ProductName": product.ProductName,
                "QuantitySold": product.QuantitySold,
                "comments": product.comments,
                "SalesAmount": product.SalesAmount
              };
            }).toList()
          }));
      setLoading(false);
      if (response.statusCode == 201) {
        ScaffoldMessenger.of(
          navigatorKey.currentContext!,
        ).showSnackBar(
          SnackBar(content: Text(response.data['message'])),
        );

        resetProducts();
        Navigator.push(
          navigatorKey.currentContext!,
          MaterialPageRoute(
            builder: (context) => const DataSubmitSuccessfull(),
          ),
        );
      }
    } catch (e) {
      setLoading(false);
      String error = "Something went wrong";
      if (e is DioException) {
        error = e.response!.data['message'] ?? "Something went wrong";
      }
      ScaffoldMessenger.of(
        navigatorKey.currentContext!,
      ).showSnackBar(
        SnackBar(
          content: Text(
            error,
          ),
        ),
      );
    }
  }

  void resetProducts() {
    selectedProducts.clear();
    tasksList.clear();
    notifyListeners();
  }
}