import 'package:get_it/get_it.dart';
import 'package:injectable/injectable.dart';
import 'package:superport/core/errors/exceptions.dart';
import 'package:superport/core/errors/failures.dart';
import 'package:superport/data/datasources/remote/warehouse_remote_datasource.dart';
import 'package:superport/data/models/warehouse/warehouse_dto.dart';
import 'package:superport/models/address_model.dart';
import 'package:superport/models/warehouse_location_model.dart';

@lazySingleton
class WarehouseService {
  final WarehouseRemoteDataSource _remoteDataSource = GetIt.instance<WarehouseRemoteDataSource>();

  // 창고 위치 목록 조회
  Future<List<WarehouseLocation>> getWarehouseLocations({
    int page = 1,
    int perPage = 20,
    bool? isActive,
  }) async {
    try {
      final response = await _remoteDataSource.getWarehouseLocations(
        page: page,
        perPage: perPage,
        isActive: isActive,
      );

      return response.items.map((dto) => _convertDtoToWarehouseLocation(dto)).toList();
    } on ApiException catch (e) {
      throw ServerFailure(message: e.message);
    } catch (e) {
      throw ServerFailure(message: '창고 위치 목록을 불러오는 데 실패했습니다: $e');
    }
  }

  // 창고 위치 상세 조회
  Future<WarehouseLocation> getWarehouseLocationById(int id) async {
    try {
      final dto = await _remoteDataSource.getWarehouseLocationById(id);
      return _convertDtoToWarehouseLocation(dto);
    } on ApiException catch (e) {
      throw ServerFailure(message: e.message);
    } catch (e) {
      throw ServerFailure(message: '창고 위치 정보를 불러오는 데 실패했습니다: $e');
    }
  }

  // 창고 위치 생성
  Future<WarehouseLocation> createWarehouseLocation(WarehouseLocation location) async {
    try {
      final request = CreateWarehouseLocationRequest(
        name: location.name,
        address: location.address.detailAddress,
        city: location.address.region,
        postalCode: location.address.zipCode,
        country: 'KR', // 기본값
      );

      final dto = await _remoteDataSource.createWarehouseLocation(request);
      return _convertDtoToWarehouseLocation(dto);
    } on ApiException catch (e) {
      throw ServerFailure(message: e.message);
    } catch (e) {
      throw ServerFailure(message: '창고 위치 생성에 실패했습니다: $e');
    }
  }

  // 창고 위치 수정
  Future<WarehouseLocation> updateWarehouseLocation(WarehouseLocation location) async {
    try {
      final request = UpdateWarehouseLocationRequest(
        name: location.name,
        address: location.address.detailAddress,
        city: location.address.region,
        postalCode: location.address.zipCode,
      );

      final dto = await _remoteDataSource.updateWarehouseLocation(location.id, request);
      return _convertDtoToWarehouseLocation(dto);
    } on ApiException catch (e) {
      throw ServerFailure(message: e.message);
    } catch (e) {
      throw ServerFailure(message: '창고 위치 수정에 실패했습니다: $e');
    }
  }

  // 창고 위치 삭제
  Future<void> deleteWarehouseLocation(int id) async {
    try {
      await _remoteDataSource.deleteWarehouseLocation(id);
    } on ApiException catch (e) {
      throw ServerFailure(message: e.message);
    } catch (e) {
      throw ServerFailure(message: '창고 위치 삭제에 실패했습니다: $e');
    }
  }

  // 창고별 장비 목록 조회
  Future<List<Map<String, dynamic>>> getWarehouseEquipment(
    int warehouseId, {
    int page = 1,
    int perPage = 20,
  }) async {
    try {
      final response = await _remoteDataSource.getWarehouseEquipment(
        warehouseId,
        page: page,
        perPage: perPage,
      );

      return response.items.map((dto) => {
        'id': dto.id,
        'equipmentNumber': dto.equipmentNumber,
        'manufacturer': dto.manufacturer,
        'equipmentName': dto.equipmentName,
        'serialNumber': dto.serialNumber,
        'quantity': dto.quantity,
        'status': dto.status,
        'storedAt': dto.storedAt,
      }).toList();
    } on ApiException catch (e) {
      throw ServerFailure(message: e.message);
    } catch (e) {
      throw ServerFailure(message: '창고 장비 목록을 불러오는 데 실패했습니다: $e');
    }
  }

  // 창고 용량 정보 조회
  Future<WarehouseCapacityInfo> getWarehouseCapacity(int id) async {
    try {
      return await _remoteDataSource.getWarehouseCapacity(id);
    } on ApiException catch (e) {
      throw ServerFailure(message: e.message);
    } catch (e) {
      throw ServerFailure(message: '창고 용량 정보를 불러오는 데 실패했습니다: $e');
    }
  }

  // 사용 중인 창고 위치 목록 조회
  Future<List<WarehouseLocation>> getInUseWarehouseLocations() async {
    try {
      final dtos = await _remoteDataSource.getInUseWarehouseLocations();
      return dtos.map((dto) => _convertDtoToWarehouseLocation(dto)).toList();
    } on ApiException catch (e) {
      throw ServerFailure(message: e.message);
    } catch (e) {
      throw ServerFailure(message: '사용 중인 창고 위치를 불러오는 데 실패했습니다: $e');
    }
  }

  // DTO를 Flutter 모델로 변환
  WarehouseLocation _convertDtoToWarehouseLocation(WarehouseLocationDto dto) {
    // 주소 조합
    final addressParts = <String>[];
    if (dto.address != null && dto.address!.isNotEmpty) {
      addressParts.add(dto.address!);
    }
    if (dto.city != null && dto.city!.isNotEmpty) {
      addressParts.add(dto.city!);
    }
    if (dto.state != null && dto.state!.isNotEmpty) {
      addressParts.add(dto.state!);
    }

    final address = Address(
      zipCode: dto.postalCode ?? '',
      region: dto.city ?? '',
      detailAddress: addressParts.join(' '),
    );

    return WarehouseLocation(
      id: dto.id,
      name: dto.name,
      address: address,
      remark: dto.managerName != null ? '담당자: ${dto.managerName}' : null,
    );
  }

  // 페이지네이션 정보
  Future<int> getTotalWarehouseLocations({bool? isActive}) async {
    try {
      final response = await _remoteDataSource.getWarehouseLocations(
        page: 1,
        perPage: 1,
        isActive: isActive,
      );
      return response.total;
    } catch (e) {
      return 0;
    }
  }
}