APP_NEW/lib/Provider/Service/service_item_provider.dart

import 'package:flutter/cupertino.dart';
import 'package:lamiter/Class/Diagnosis/diagnosis.dart';
import 'package:lamiter/Class/Entity/entity.dart';

import 'package:lamiter/Class/Service/service_item.dart';
import 'package:lamiter/Class/Service/service_item_filt_type.dart';
import 'package:lamiter/Mixin/filter.dart';
import 'package:lamiter/Provider/Diagnosis/Diagnosis_Item/constitution_provider.dart';
import 'package:lamiter/Provider/Diagnosis/Diagnosis_Item/posture_issue_provider.dart';
import 'package:lamiter/Provider/Diagnosis/Diagnosis_Item/urban_disease_provider.dart';
import 'package:provider/provider.dart';

abstract class ServiceItemProvider extends ChangeNotifier with Filter {
  // 品牌與服務項目
  late List<ServiceItem> serviceItems;
  late List<Entity> companyPairs;
  late List<Entity> productCategoryPairs;
  late List<Entity> urbanDiseasePairs;
  late List<Entity> constitutionPairs;
  late List<Entity> postureIssuePairs;

  // 篩選條件
  late String keyword;
  late List<String> selectedCompanyIds;
  late List<String> selectedProductCategoryIds;
  late List<String> selectedUrbanDiseaseIds;
  late List<String> selectedConstitutionIds;
  late List<String> selectedPostureIssueIds;

  ServiceItemProvider() {
    init();
  }

  List<ServiceItemFiltType> filtTypes(); // 選擇開放的篩選條件

  void init() {
    // 配對商品
    serviceItems = [];
    filtedList = []; // 主要呈現列表
    // 標籤
    companyPairs = [];
    productCategoryPairs = [];
    urbanDiseasePairs = [];
    constitutionPairs = [];
    postureIssuePairs = [];
    // 篩選標籤
    keyword = '';
    selectedCompanyIds = [];
    selectedProductCategoryIds = [];
    selectedUrbanDiseaseIds = [];
    selectedConstitutionIds = [];
    selectedPostureIssueIds = [];
    notifyListeners();
  }

  Future<void> start(BuildContext context, Diagnosis? diagnosis) async {
    init();
    // 固定標籤
    urbanDiseasePairs = context
        .read<UrbanDiseaseProvider>()
        .elements
        .map((urbanDisease) =>
            Entity(id: urbanDisease.id, name: urbanDisease.name))
        .toList();
    constitutionPairs = context
        .read<ConstitutionProvider>()
        .elements
        .map((constitution) =>
            Entity(id: constitution.id, name: constitution.name))
        .toList();
    postureIssuePairs = context
        .read<PostureIssueProvider>()
        .elements
        .map((postureIssue) =>
            Entity(id: postureIssue.id, name: postureIssue.name))
        .toList();
    // 依據診斷報告調整篩選標籤
    keyword = '';
    selectedCompanyIds = [];
    selectedProductCategoryIds = [];
    selectedUrbanDiseaseIds = diagnosis?.urbanDiseaseResult?.diseaseIds ?? [];
    selectedConstitutionIds = diagnosis?.constitutionResult
            ?.risk_constitutions(context)
            .map((constitution) => constitution.id)
            .toList() ??
        [];
    selectedPostureIssueIds = diagnosis?.postureIssueResult
            ?.risk_posture_issues(context)
            .map((postureIssue) => postureIssue.id)
            .toList() ??
        [];
    await refresh(context);
  }

  Future<void> refresh(BuildContext context);

  int filtCount() {
    int count = 0;
    if (selectedCompanyIds.isNotEmpty) count++;
    if (selectedProductCategoryIds.isNotEmpty) count++;
    if (selectedUrbanDiseaseIds.isNotEmpty) count++;
    if (selectedConstitutionIds.isNotEmpty) count++;
    if (selectedPostureIssueIds.isNotEmpty) count++;
    return count;
  }

  void updateKeyword(String value) {
    keyword = value;
    _filt();
  }

  void updateServiceItemFiltType(ServiceItemFiltType type, String id) {
    int index = findServiceItemFiltTypeWithId(type, id);
    switch (type) {
      case ServiceItemFiltType.supportCompany:
        if (index == -1) {
          selectedCompanyIds.add(id);
        } else {
          selectedCompanyIds.removeAt(index);
        }
        break;
      case ServiceItemFiltType.productCategory:
        if (index == -1) {
          selectedProductCategoryIds.add(id);
        } else {
          selectedProductCategoryIds.removeAt(index);
        }
        break;
      case ServiceItemFiltType.urbanDisease:
        if (index == -1) {
          selectedUrbanDiseaseIds.add(id);
        } else {
          selectedUrbanDiseaseIds.removeAt(index);
        }
        break;
      case ServiceItemFiltType.constitution:
        if (index == -1) {
          selectedConstitutionIds.add(id);
        } else {
          selectedConstitutionIds.removeAt(index);
        }
        break;
      case ServiceItemFiltType.postureIssue:
        if (index == -1) {
          selectedPostureIssueIds.add(id);
        } else {
          selectedPostureIssueIds.removeAt(index);
        }
        break;
    }
    _filt();
  }

  int findServiceItemFiltTypeWithId(ServiceItemFiltType type, String id) {
    switch (type) {
      case ServiceItemFiltType.supportCompany:
        return selectedCompanyIds.indexWhere((_id) => _id == id);
      case ServiceItemFiltType.productCategory:
        return selectedProductCategoryIds.indexWhere((_id) => _id == id);
      case ServiceItemFiltType.urbanDisease:
        return selectedUrbanDiseaseIds.indexWhere((_id) => _id == id);
      case ServiceItemFiltType.constitution:
        return selectedConstitutionIds.indexWhere((_id) => _id == id);
      case ServiceItemFiltType.postureIssue:
        return selectedPostureIssueIds.indexWhere((_id) => _id == id);
    }
  }

  void _filt() {
    super.filtedList = serviceItems;
    super.filtedList = filtWithKeyword(super.filtedList!, keyword);
    super.filtedList = filtWithCompany(super.filtedList!, selectedCompanyIds);
    super.filtedList =
        filtWithProductCategory(super.filtedList!, selectedProductCategoryIds);
    super.filtedList = filtWithHealthConditions(
      super.filtedList!,
      selectedUrbanDiseaseIds,
      selectedConstitutionIds,
      selectedPostureIssueIds,
    );
    super.filtedList = sortWithLastUpdateTime(super.filtedList!);
    notifyListeners();
  }
}