import 'dart:convert';

import 'package:flutter/cupertino.dart';
import 'package:http/http.dart';
import 'package:test_sa/controllers/api_routes/urls.dart';
import 'package:test_sa/controllers/http_status_manger/http_status_manger.dart';
import 'package:test_sa/models/issue.dart';
import 'package:test_sa/models/lookup.dart';
import 'package:test_sa/models/service_report.dart';
import 'package:test_sa/models/service_request/service_request.dart';
import 'package:test_sa/models/service_request/service_request_search.dart';
import 'package:test_sa/models/subtitle.dart';
import 'package:test_sa/models/timer_model.dart';
import 'package:test_sa/models/user.dart';

class ServiceRequestsProvider extends ChangeNotifier{

  // number of items call in each request
  final pageItemNumber = 50;

  //reset provider data
  void reset(){
    serviceRequests = 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<ServiceRequest> serviceRequests;

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

  ServiceRequestSearch search = ServiceRequestSearch();

  /// 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> getRequests ({
    @required String host,
    @required User user,
    @required String hospitalId,
  }) async {
    if(isLoading == true)
      return -2;
    isLoading = true;
    Response response;
    try{
      response = await get(
          Uri.parse(
        host+URLs.getServiceRequests
          +"?uid=${user.id}"
          +(hospitalId == null? "" :"&client_nid=$hospitalId")
          +"&token=${user.token}"
          "&page=${(serviceRequests?.length ?? 0) ~/pageItemNumber}"
          +search?.toSearchString() ?? ""
          ),
        headers: {
            "Content-Type":"application/json; charset=utf-8"
        }
      );
      stateCode = response.statusCode;
      if(response.statusCode >= 200 && response.statusCode < 300) {
        // client's request was successfully received
        List requestsListJson = json.decode(utf8.decode(response.bodyBytes).replaceAll("\\", ""));
        List<ServiceRequest> _serviceRequestsPage = requestsListJson.map(
                (request) => ServiceRequest.fromJson(request)).toList();
        if(serviceRequests == null)
          serviceRequests = [];
        serviceRequests.addAll(_serviceRequestsPage);
        if(_serviceRequestsPage.length == pageItemNumber){
          nextPage = true;
        }else{
          nextPage = false;
        }
      }
      isLoading = false;
      notifyListeners();
      return response.statusCode;

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

  }

  Future<ServiceRequest> getSingleServiceRequest({
    @required String requestId,
    @required String host,
    @required User user,
    @required Subtitle subtitle,
  }) async {
    String userData = '';
    if(user != null){
      userData += "&uid="+user.id;
      userData += "&token="+user.token;
    }

    Response response;
    try{
      response = await get(
          Uri.parse(
        host+URLs.getSingleServiceRequest
            +'?call_nid=$requestId'
            '$userData',)
      );
    }catch(error){
      throw(HttpStatusManger.getStatusMessage(
          status: -1, subtitle: subtitle));
    }

    // If the call to the server was successful, parse the JSON.
    if (response.statusCode >= 200 && response.statusCode < 300){
      // If the call to the server was successful, parse the JSON.
      List jsonList = json.decode(utf8.decode(response.bodyBytes).replaceAll("\\", ""));
      List<ServiceRequest> _requests = jsonList.map((i) => ServiceRequest.fromJson(i)).toList();
      return _requests[0];
    }else{
      throw(HttpStatusManger.getStatusMessage(
          status: response.statusCode, subtitle: subtitle));
    }

  }

  Future<int> createRequest ({
    @required String host,
    @required User user,
    @required ServiceRequest serviceRequest,
  }) async {

    var body = {
      "uid": user.id,
      "token": user.token ?? "",
      "sn_id": serviceRequest.deviceId ?? "",
      "date": (DateTime.now().millisecondsSinceEpoch).toString(),
      "client": user.hospital.id ?? '',
      "complaint": serviceRequest.maintenanceIssue,
      "image": json.encode(serviceRequest.devicePhotos),
      "priority": (serviceRequest.priority?.id).toString(),
      "defect_types": (serviceRequest.defectType?.id).toString(),
    };
    if(serviceRequest.audio != null){
      body["audio"] = serviceRequest.audio;
    }
    Response response;
    try{
      response = await post(
          Uri.parse(
          host+URLs.createRequest),
          body: body,
      );
      stateCode = response.statusCode;
      if(response.statusCode >= 200 && response.statusCode < 300) {
        if(serviceRequests != null)
          serviceRequests.insert(
              0,
              ServiceRequest.fromJson(
                  json.decode(utf8.decode(response.bodyBytes))[0]
              )
          );
        notifyListeners();
      }
      return response.statusCode;

    } catch(error) {
      return -1;
    }

  }

  Future<int> createIssueReport ({
    @required String host,
    @required User user,
    @required Issue issue,
  }) async {
    Response response;
    Map<String,String> body = issue.toMap();
    body["uid"] = user.id;
    body["token"] = user.token;
    try{
      response = await post(
          Uri.parse(host+URLs.createReport),
        body: body,
      );

      stateCode = response.statusCode;
      if(response.statusCode >= 200 && response.statusCode < 300) {

      }
      return response.statusCode;

    } catch(error) {
      return -1;
    }

  }

  Future<int> updateDate ({
    @required String host,
    @required User user,
    @required String newDate,
    @required Lookup employee,
    @required ServiceRequest request,
  }) async {
    Response response;
    Map<String,String> body = {};
    body["uid"] = user.id;
    body["token"] = user.token;
    body["nid"] = request.id;
    if(newDate != null) body["date"] = newDate;
    if(employee != null) body["ass_emp"] = employee.id.toString();
    try{
      response = await post(
          Uri.parse(
        host+URLs.updateRequestDate),
        body: body,
      );
      stateCode = response.statusCode;
      if(response.statusCode >= 200 && response.statusCode < 300) {
        request.engineerName = employee.label;
        notifyListeners();
      }
      return response.statusCode;

    } catch(error) {
      return -1;
    }

  }

  Future<int> createServiceReport ({
    @required String host,
    @required User user,
    @required ServiceReport report,
    @required ServiceRequest request,
  }) async {
    Response response;
    Map<String,String> body = report.toMap();
    body["uid"] = user.id;
    body["token"] = user.token;
    body["job_id"] = request.id;
    try{
      response = await post(
          Uri.parse(
        host+URLs.createServiceReport),
        body: body,
      );

      stateCode = response.statusCode;
      if(response.statusCode >= 200 && response.statusCode < 300) {
        reset();
        notifyListeners();
      }
      return response.statusCode;

    } catch(error) {

      return -1;
    }

  }

  Future<int> createDuplicatedReport ({
    @required String host,
    @required User user,
    @required ServiceRequest request,
  }) async {
    Response response;
    String userData = '';
    if(user != null){
      userData += "&uid="+user.id;
      userData += "&token="+user.token;
    }

    try{
      response = await get(
        Uri.parse(
            host+URLs.createDuplicatedReport
                +"?nid=${request.id}"
                +userData),
      );

      stateCode = response.statusCode;

      if(response.statusCode >= 200 && response.statusCode < 300) {
        reset();
        notifyListeners();
      }
      return response.statusCode;

    } catch(error) {

      return -1;
    }

  }

  Future<int> updateServiceReport ({
    @required String host,
    @required User user,
    @required ServiceReport report,
    @required ServiceRequest request,
  }) async {
    Response response;
    Map<String,String> body = report.toMap();
    body["uid"] = user.id;
    body["token"] = user.token;
    body["job_id"] = request.id;
    body["report_id"] = request.reportID;
    try{
      response = await post(
        Uri.parse(
            host+URLs.updateServiceReport),
        body: body,
      );
      stateCode = response.statusCode;

      if(response.statusCode >= 200 && response.statusCode < 300) {
        reset();
        notifyListeners();
      }
      return response.statusCode;

    } catch(error) {

      return -1;
    }

  }

  Future<int> updateServiceReportTimer ({
    @required String host,
    @required User user,
    @required TimerModel timer,
    @required ServiceRequest request,
  }) async {
    Response response;
    Map<String,String> body = {};
    body["uid"] = user.id;
    body["token"] = user.token;
    body["job_id"] = request.id;
    body["start_time"] = (timer.startAt.millisecondsSinceEpoch / 1000).toStringAsFixed(0);
    body["end_time"] =  (timer.endAt.millisecondsSinceEpoch / 1000).toStringAsFixed(0);
    body["working_hours"] = (timer.durationInSecond / 60 / 60).toStringAsFixed(5);
    body["report_id"] = request.reportID;
    try{
      response = await post(
        Uri.parse(
            host+URLs.updateServiceReport),
        body: body,
      );
      //stateCode = response.statusCode;

      if(response.statusCode >= 200 && response.statusCode < 300) {
        // reset();
        // notifyListeners();
      }
      return response.statusCode;

    } catch(error) {

      return -1;
    }

  }

  Future<ServiceReport> getSingleServiceReport({
    @required String reportId,
    @required String host,
    @required User user,
    @required Subtitle subtitle,
  }) async {
    String userData = '';
    if(user != null){
      userData += "&uid="+user.id;
      userData += "&token="+user.token;
    }

    Response response;
    try{

      response = await get(
          Uri.parse(
            host+URLs.getServiceReport
                +'?report_id=$reportId'
                '$userData',)
      );

    }catch(error){
      throw(HttpStatusManger.getStatusMessage(
          status: -1, subtitle: subtitle));
    }

    // If the call to the server was successful, parse the JSON.
    if (response.statusCode >= 200 && response.statusCode < 300){
      // If the call to the server was successful, parse the JSON.
      return ServiceReport.fromJson(
          json.decode(utf8.decode(response.bodyBytes)),reportId);
    }else{
      throw(HttpStatusManger.getStatusMessage(
          status: response.statusCode, subtitle: subtitle));
    }

  }


}