import 'dart:convert';

import 'package:flutter/cupertino.dart';
import 'package:http/http.dart';

import '../../../models/user.dart';
import '../../../models/visits/visit.dart';
import '../../../models/visits/visits_group.dart';
import '../../../models/visits/visits_search.dart';
import '../../api_routes/urls.dart';

class PreventiveMaintenanceVisitsProvider extends ChangeNotifier {
  // number of items call in each request
  final pageItemNumber = 50;

  //reset provider data
  void reset() {
    visits = null;
    nextPage = true;
    stateCode = null;
  }

  // state code of current request to defied error message
  // like 400 customer request failed
  // 500 service not available
  int? stateCode;

  // true if there is next page in product list and false if not
  bool? nextPage = true;

  // list of user requests
  List<Visit>? visits;

  // when requests in-process _loading = true
  // done _loading = true
  // failed _loading = false
  bool? isLoading;

  VisitsSearch? visitsSearch = VisitsSearch();

  /// return -2 if request in progress
  /// return -1 if error happen when sending request
  /// return state code if request complete may be 200, 404 or 403
  /// for more details check http state manager
  /// lib\controllers\http_status_manger\http_status_manger.dart
  Future<int> getVisits({
    required String host,
    required User user,
    // VisitsSearch visitsSearch,
  }) async {
    if (isLoading == true) return -2;
    isLoading = true;
    Response response;
    //userId = 397.toString(); // testing id to view data
    try {
      response = await get(
        Uri.parse(
          "${host + URLs.getPreventiveMaintenanceVisits}?uid=${user.id}&token=${user.token}&page=${(visits?.length ?? 0) ~/ pageItemNumber}${visitsSearch?.toSearchString()}",
        ),
        headers: {"Content-Type": "application/json; charset=utf-8"},
      );
    } catch (error) {
      isLoading = false;
      stateCode = -1;
      notifyListeners();
      return -1;
    }
    stateCode = response.statusCode;
    if (response.statusCode >= 200 && response.statusCode < 300) {
      // client's request was successfully received
      List requestsListJson = json.decode(utf8.decode(response.bodyBytes));
      List<Visit> visits =
          requestsListJson.map((request) => Visit.fromJson(request)).toList();
      visits.addAll(visits);
      if (visits.length == pageItemNumber) {
        nextPage = true;
      } else {
        nextPage = false;
      }
    }
    isLoading = false;
    notifyListeners();
    return response.statusCode;
  }

  /// return -2 if request in progress
  /// return -1 if error happen when sending request
  /// return state code if request complete may be 200, 404 or 403
  /// for more details check http state manager
  /// lib\controllers\http_status_manger\http_status_manger.dart
  Future<int> updateGroupOfVisits({
    required String host,
    required User user,
    required VisitsGroup group,
  }) async {
    Response response;
    Map<String, String> body = group.toJson();
    body["token"] = user.token;
    body["uid"] = user.id;
    //userId = 397.toString(); // testing id to view data
    try {
      response = await post(
        Uri.parse(host + URLs.updatePreventiveMaintenanceVisits),
        body: body,
      );

      stateCode = response.statusCode;
      if (response.statusCode >= 200 && response.statusCode < 300) {
        // client's request was successfully received
        for (var visit in group.visits) {
          visit.status = group.status;
          visit.actualDate = group.date.toString().split(" ").first;
        }
        group.visits.clear();
        notifyListeners();
      }

      return response.statusCode;
    } catch (error) {
      isLoading = false;
      stateCode = -1;
      notifyListeners();
      return -1;
    }
  }
}