import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:mohem_flutter_app/api/api_client.dart';
import 'package:mohem_flutter_app/app_state/app_state.dart';
import 'package:mohem_flutter_app/classes/consts.dart';
import 'package:mohem_flutter_app/models/offers_and_discounts/get_categories_list.dart';
import 'package:mohem_flutter_app/models/offers_and_discounts/get_offers_list.dart';
import 'package:mohem_flutter_app/models/offers_and_discounts/wala_plus_category_model.dart';
import 'package:mohem_flutter_app/models/offers_and_discounts/wala_plus_retailer_model.dart';

class OffersAndDiscountsApiClient {
  static final OffersAndDiscountsApiClient _instance = OffersAndDiscountsApiClient._internal();

  OffersAndDiscountsApiClient._internal();

  factory OffersAndDiscountsApiClient() => _instance;

  Future<List<GetCategoriesList>> getSaleCategories() async {
    List<GetCategoriesList> getSaleCategoriesList = [];

    String url = "${ApiConsts.cocRest}Mohemm_ITG_GetCategories";
    Map<String, dynamic> postParams = {"EmployeeNumber": AppState().memberInformationList?.eMPLOYEENUMBER, "ItgPageSize": 100, "ItgPageNo": 1, "ItgIsActive": true};

    postParams.addAll(AppState().postParamsJson);
    return await ApiClient().postJsonForObject(
      (response) {
        var body = json.decode(response['Mohemm_ITG_ResponseItem']);

        GetCategoriesList getSaleCategoriesListObj = GetCategoriesList();
        getSaleCategoriesListObj.id = 0;
        getSaleCategoriesListObj.categoryNameEn = "All";
        getSaleCategoriesListObj.categoryNameAr = "الجميع";
        getSaleCategoriesListObj.isActive = true;
        getSaleCategoriesListObj.content =
            '<svg xmlns="http://www.w3.org/2000/svg" width="26.213" height="26.213" viewBox="0 0 26.213 26.213"> <g id="More_Select" data-name="More Select" transform="translate(-1 -1)"> <path id="Path_4860" data-name="Path 4860" d="M26.844,1H5.874A.874.874,0,0,0,5,1.874v.874H23.349A2.621,2.621,0,0,1,25.97,5.369V23.718h.874a.874.874,0,0,0,.874-.874V1.874A.874.874,0,0,0,26.844,1Z" transform="translate(-0.505)" fill="#2bb8a6"/> <path id="Path_4861" data-name="Path 4861" d="M22.844,5H1.874A.874.874,0,0,0,1,5.874v20.97a.874.874,0,0,0,.874.874h20.97a.874.874,0,0,0,.874-.874V5.874A.874.874,0,0,0,22.844,5ZM18.7,13.164,11.07,20.789a.874.874,0,0,1-1.236,0L6.022,16.977a.874.874,0,1,1,1.236-1.236l3.2,3.195,7.008-7.007A.874.874,0,1,1,18.7,13.165Z" transform="translate(0 -0.505)" fill="#125765"/> </g> </svg>';

        getSaleCategoriesList.add(getSaleCategoriesListObj);

        body['result']['data'].forEach((v) {
          getSaleCategoriesList.add(GetCategoriesList.fromJson(v));
        });
        return getSaleCategoriesList;
      },
      url,
      postParams,
    );
  }

  Future<List<OffersListModel>> getOffersList(int categoryID, int pageSize) async {
    List<OffersListModel> getSaleCategoriesList = [];

    String url = "${ApiConsts.cocRest}GetOfferDiscountsConfigData";
    Map<String, dynamic> postParams = {"EmployeeNumber": AppState().memberInformationList?.eMPLOYEENUMBER, "ItgPageSize": pageSize, "ItgPageNo": 1, "ItgCategoryID": categoryID};

    postParams.addAll(AppState().postParamsJson);
    return await ApiClient().postJsonForObject(
      (response) {
        var body = json.decode(response['Mohemm_ITG_ResponseItem']);

        var bodyData = body['result']['data'];

        if (bodyData != null) {
          bodyData.forEach((v) {
            getSaleCategoriesList.add(OffersListModel.fromJson(v));
          });
        }
        return getSaleCategoriesList;
      },
      url,
      postParams,
    );
  }

  String _resolveUserName() {
    String? pUserName = AppState().getUserName;
    if (pUserName == null || pUserName.isEmpty) {
      pUserName = AppState().postParamsObject?.userName ??
          AppState().postParamsObject?.pUserName ??
          AppState().memberInformationList?.eMPLOYEENUMBER;
    }
    return pUserName ?? "";
  }

  String _resolveDepNationalId() {
    if (!ApiConsts.isDependetLogin) {
      return "";
    }
    return AppState().getUserName ?? "";
  }

  String _resolveMobileNumber({String? overrideMobile}) {
    if (overrideMobile != null && overrideMobile.trim().isNotEmpty) {
      return overrideMobile.trim();
    }
    String? mobile = AppState().postParamsObject?.mobileNumber;
    if (mobile != null && mobile.trim().isNotEmpty) {
      return mobile.trim();
    }
    mobile = AppState().memberInformationList?.eMPLOYEEMOBILENUMBER;
    if (mobile != null && mobile.trim().isNotEmpty) {
      return mobile.trim();
    }
    mobile = AppState().walaplusDepInfoModel?.pEmpMobileNumber;
    if (mobile != null && mobile.trim().isNotEmpty) {
      return mobile.trim();
    }
    mobile = AppState().memberLoginList?.pMOBILENUMBER;
    if (mobile != null && mobile.trim().isNotEmpty) {
      return mobile.trim();
    }
    mobile = AppState().memberInformationList?.mobileNumberWithZipCode;
    if (mobile != null && mobile.trim().isNotEmpty) {
      return mobile.trim();
    }
    return "";
  }


  Map<String, dynamic> _getBaseWalaPlusParams() {
    Map<String, dynamic> base = {};
    base.addAll(AppState().postParamsJson);
    if (ApiConsts.isDependetLogin) {
      String? token = AppState().postParamsObject?.tokenID ?? AppState().authenticationTokenID;
      if (token != null && token.isNotEmpty) {
        base["TokenID"] = token;
      }
      String? logInToken = AppState().postParamsObject?.logInTokenID;
      if (logInToken != null && logInToken.isNotEmpty) {
        base["LogInTokenID"] = logInToken;
      }
    }
    _cleanWalaPlusParams(base);
    return base;
  }

  void _cleanWalaPlusParams(Map<String, dynamic> map) {
    map.remove("P_EMAIL_ADDRESS");
    map.remove("P_SESSION_ID");
    map.remove("PayrollCodeStr");
    map.remove("LegislationCodeStr");
    map.remove("P_SELECTED_EMPLOYEE_NUMBER");
    map.removeWhere((key, value) => value == null);
  }

  Future<List<WalaPlusCategoryModel>> getWalaPlusCategories({BuildContext? context, String? mobileNumber}) async {
    String url = ApiConsts.walaPlusCategories;
    String pUserName = _resolveUserName();
    String pMobileNumber = _resolveMobileNumber(overrideMobile: mobileNumber);
    String pDepNationalId = _resolveDepNationalId();

    Map<String, dynamic> postParams = _getBaseWalaPlusParams();
    postParams["UserName"] = pUserName;
    postParams["P_USER_NAME"] = pUserName;
    postParams["P_DEP_NATIONAL_ID"] = pDepNationalId;
    if (pMobileNumber.isNotEmpty) {
      postParams["MobileNumber"] = pMobileNumber;
    }
    postParams["MemberType"] = ApiConsts.isDependetLogin ? 2 : 1;
    postParams["CompanyID"] = 1;
    _cleanWalaPlusParams(postParams);

    return await ApiClient().postJsonForObject(
      (response) {
        List<WalaPlusCategoryModel> categories = [];
        if (response != null) {
          dynamic cats = response['WalaPlus_Categories'] ??
              response['walaPlus_Categories'] ??
              response['WalaPlusCategories'] ??
              response['result'];
          if (cats is String) {
            try {
              cats = json.decode(cats);
            } catch (e) {
              debugPrint("Error decoding WalaPlus_Categories: $e");
            }
          }
          if (cats is List) {
            cats.forEach((v) {
              if (v is Map<String, dynamic>) {
                categories.add(WalaPlusCategoryModel.fromJson(v));
              } else if (v is Map) {
                categories.add(WalaPlusCategoryModel.fromJson(Map<String, dynamic>.from(v)));
              }
            });
          }
        }
        return categories;
      },
      url,
      postParams,
    );
  }

  Future<WalaPlusRetailersResponse?> getWalaPlusRetailers({
    String? categoryId,
    int page = 1,
    int perPage = 10,
    String? geoLocation,
    BuildContext? context,
    String? mobileNumber,
  }) async {
    String url = ApiConsts.walaPlusRetailers;
    String pUserName = _resolveUserName();
    String pMobileNumber = _resolveMobileNumber(overrideMobile: mobileNumber);
    String pDepNationalId = _resolveDepNationalId();
    String effectiveCatId = (categoryId == "all" || categoryId == "0" || categoryId == null) ? "" : categoryId;

    Map<String, dynamic> postParams = _getBaseWalaPlusParams();
    postParams["UserName"] = pUserName;
    postParams["P_USER_NAME"] = pUserName;
    postParams["P_DEP_NATIONAL_ID"] = pDepNationalId;
    if (pMobileNumber.isNotEmpty) {
      postParams["MobileNumber"] = pMobileNumber;
    }
    postParams["MemberType"] = ApiConsts.isDependetLogin ? 2 : 1;
    postParams["CompanyID"] = 1;
    postParams["WP_CategoryID"] = effectiveCatId;
    postParams["WP_Page"] = page;
    postParams["WP_Per_page"] = perPage;

    if (geoLocation != null && geoLocation.isNotEmpty) {
      postParams["WP_Geo_Location"] = geoLocation;
    }
    _cleanWalaPlusParams(postParams);

    return await ApiClient().postJsonForObject(
      (response) {
        if (response != null) {
          dynamic val = response['WalaPlus_Retailers'] ??
              response['walaPlus_Retailers'] ??
              response['WalaPlusRetailers'] ??
              response['WP_Retailers'] ??
              response['result'];
          if (val is String) {
            try {
              val = json.decode(val);
            } catch (e) {
              debugPrint("Error decoding WalaPlus_Retailers: $e");
            }
          }
          if (val is Map<String, dynamic>) {
            return WalaPlusRetailersResponse.fromJson(val);
          } else if (val is Map) {
            return WalaPlusRetailersResponse.fromJson(Map<String, dynamic>.from(val));
          } else if (val is List) {
            List<WalaPlusRetailerModel> retailers = [];
            for (var v in val) {
              if (v is Map<String, dynamic>) {
                retailers.add(WalaPlusRetailerModel.fromJson(v));
              } else if (v is Map) {
                retailers.add(WalaPlusRetailerModel.fromJson(Map<String, dynamic>.from(v)));
              }
            }
            return WalaPlusRetailersResponse(retailers: retailers, page: 1, pagesCount: 1, perPage: retailers.length);
          }
        }
        return null;
      },
      url,
      postParams,
    );
  }

  Future<WalaPlusRetailerModel?> getWalaPlusRetailerById({
    required String retailerId,
    BuildContext? context,
    String? mobileNumber,
  }) async {
    String url = ApiConsts.walaPlusRetailersByID;
    String pUserName = _resolveUserName();
    String pMobileNumber = _resolveMobileNumber(overrideMobile: mobileNumber);
    String pDepNationalId = _resolveDepNationalId();

    Map<String, dynamic> postParams = _getBaseWalaPlusParams();
    postParams["WP_RetailerID"] = retailerId;
    postParams["RetailerID"] = retailerId;
    postParams["UserName"] = pUserName;
    postParams["P_USER_NAME"] = pUserName;
    postParams["P_DEP_NATIONAL_ID"] = pDepNationalId;
    if (pMobileNumber.isNotEmpty) {
      postParams["MobileNumber"] = pMobileNumber;
    }
    postParams["MemberType"] = ApiConsts.isDependetLogin ? 2 : 1;
    postParams["CompanyID"] = 1;
    _cleanWalaPlusParams(postParams);

    debugPrint("getWalaPlusRetailerById: calling $url with WP_RetailerID: $retailerId");

    return await ApiClient().postJsonForObject(
      (response) {
        if (response != null) {
          debugPrint("getWalaPlusRetailerById response keys: ${response is Map ? response.keys.toList() : 'non-map'}");
          dynamic val = response['WalaPlus_RetailersByID'] ??
              response['walaPlus_RetailersByID'] ??
              response['WalaPlusRetailersByID'] ??
              response['WP_RetailersByID'] ??
              response['result'];
          if (val is String) {
            try {
              val = json.decode(val);
            } catch (e) {
              debugPrint("Error decoding WalaPlus_RetailersByID JSON string: $e");
            }
          }
          WalaPlusRetailerModel? model;
          if (val is List && val.isNotEmpty) {
            var item = val.first;
            if (item is Map<String, dynamic>) {
              model = WalaPlusRetailerModel.fromJson(item);
            } else if (item is Map) {
              model = WalaPlusRetailerModel.fromJson(Map<String, dynamic>.from(item));
            }
          } else if (val is Map) {
            Map<String, dynamic> map = (val is Map<String, dynamic>) ? val : Map<String, dynamic>.from(val);
            if (map.containsKey('retailer')) {
              var byIdResponse = WalaPlusRetailersByIDResponse.fromJson(map);
              model = byIdResponse.primaryRetailer ?? WalaPlusRetailerModel.fromJson(map);
            } else {
              model = WalaPlusRetailerModel.fromJson(map);
            }
            if ((model?.offers == null || model!.offers!.isEmpty) && (map.containsKey('offers') || map.containsKey('Offers'))) {
              model?.offers = WalaPlusRetailerModel.parseOffersList(map['offers'] ?? map['Offers']);
            }
            if ((model?.locations == null || model!.locations!.isEmpty) &&
                (map.containsKey('locations') || map.containsKey('Locations') || map.containsKey('location') || map.containsKey('Location'))) {
              model?.locations = WalaPlusRetailerModel.parseLocationsList(
                map['locations'] ?? map['Locations'] ?? map['location'] ?? map['Location'],
              );
            }
          } else if (response is Map<String, dynamic> && response.containsKey('name')) {
            model = WalaPlusRetailerModel.fromJson(response);
          }

          if (model != null) {
            if (response is Map) {
              if ((model.offers == null || model.offers!.isEmpty) && (response.containsKey('offers') || response.containsKey('Offers'))) {
                model.offers = WalaPlusRetailerModel.parseOffersList(response['offers'] ?? response['Offers']);
              }
              if ((model.locations == null || model.locations!.isEmpty) &&
                  (response.containsKey('locations') || response.containsKey('Locations') || response.containsKey('location') || response.containsKey('Location'))) {
                model.locations = WalaPlusRetailerModel.parseLocationsList(
                  response['locations'] ?? response['Locations'] ?? response['location'] ?? response['Location'],
                );
              }
            }
            debugPrint("getWalaPlusRetailerById: parsed retailer '${model.name}', offers: ${model.offers?.length ?? 0}, locations: ${model.locations?.length ?? 0}");
            return model;
          }
        }
        return null;
      },
      url,
      postParams,
    );
  }

  String _resolveUserReference({String? overrideUserReference}) {
    if (overrideUserReference != null && overrideUserReference.trim().isNotEmpty) {
      return overrideUserReference.trim();
    }
    String? ref = AppState().memberInformationList?.eMPLOYEENUMBER?.toString();
    if (ref != null && ref.trim().isNotEmpty) {
      return ref.trim();
    }
    String? pUserName = AppState().getUserName;
    if (pUserName != null && pUserName.trim().isNotEmpty) {
      return pUserName.trim();
    }
    return "";
  }

  Future<Map<String, dynamic>?> redeemWalaPlusOffer({
    required String offerId,
    String? offerType,
    String? userReference,
    BuildContext? context,
  }) async {
    String url = ApiConsts.walaPlusOfferRedeem;
    String pUserName = _resolveUserName();
    String pUserReference = _resolveUserReference(overrideUserReference: userReference);

    Map<String, dynamic> postParams = _getBaseWalaPlusParams();
    postParams["WP_User_Reference"] = pUserReference;
    postParams["WP_Offer_Id"] = offerId;
    postParams["WP_Offer_Type"] = (offerType != null && offerType.trim().isNotEmpty) ? offerType.trim() : "promo";
    postParams["UserName"] = pUserName;
    postParams["P_USER_NAME"] = pUserName;

    if (ApiConsts.isDependetLogin) {
      String pDepNationalId = _resolveDepNationalId();
      if (pDepNationalId.isNotEmpty) {
        postParams["P_DEP_NATIONAL_ID"] = pDepNationalId;
      }
      postParams["MemberType"] = 2;
    } else {
      postParams["P_DEP_NATIONAL_ID"] = "";
      postParams["MemberType"] = 1;
    }
    _cleanWalaPlusParams(postParams);

    debugPrint("redeemWalaPlusOffer calling $url with params: $postParams");

    return await ApiClient().postJsonForObject(
      (response) {
        if (response != null) {
          debugPrint("redeemWalaPlusOffer response: $response");
          dynamic val = response['WalaPlus_OfferRedeem'] ??
              response['walaPlus_OfferRedeem'] ??
              response['WalaPlusOfferRedeem'] ??
              response['result'];
          if (val is String) {
            try {
              val = json.decode(val);
            } catch (e) {
              debugPrint("Error decoding WalaPlus_OfferRedeem: $e");
            }
          }
          if (val is Map<String, dynamic>) {
            return val;
          } else if (val is Map) {
            return Map<String, dynamic>.from(val);
          }
        }
        return null;
      },
      url,
      postParams,
    );
  }
}