import 'package:injectable/injectable.dart';
import 'package:superport/core/constants/api_endpoints.dart';
import 'package:superport/core/errors/exceptions.dart';
import 'package:superport/data/datasources/remote/api_client.dart';
import 'package:superport/data/models/warehouse/warehouse_dto.dart';

abstract class WarehouseRemoteDataSource {
  Future<WarehouseLocationListDto> getWarehouseLocations({
    int page = 1,
    int perPage = 20,
    bool? isActive,
    String? search,
    bool includeInactive = false,
  });

  Future<WarehouseLocationDto> getWarehouseLocationById(int id);
  Future<WarehouseLocationDto> createWarehouseLocation(CreateWarehouseLocationRequest request);
  Future<WarehouseLocationDto> updateWarehouseLocation(int id, UpdateWarehouseLocationRequest request);
  Future<void> deleteWarehouseLocation(int id);
  Future<WarehouseEquipmentListDto> getWarehouseEquipment(
    int warehouseId, {
    int page = 1,
    int perPage = 20,
  });
  Future<WarehouseCapacityInfo> getWarehouseCapacity(int id);
  Future<List<WarehouseLocationDto>> getInUseWarehouseLocations();
}

@LazySingleton(as: WarehouseRemoteDataSource)
class WarehouseRemoteDataSourceImpl implements WarehouseRemoteDataSource {
  final ApiClient _apiClient;

  WarehouseRemoteDataSourceImpl({
    required ApiClient apiClient,
  }) : _apiClient = apiClient;

  @override
  Future<WarehouseLocationListDto> getWarehouseLocations({
    int page = 1,
    int perPage = 20,
    bool? isActive,
    String? search,
    bool includeInactive = false,
  }) async {
    try {
      final queryParams = <String, dynamic>{
        'page': page,
        'per_page': perPage,
      };

      if (isActive != null) queryParams['is_active'] = isActive;
      if (search != null && search.isNotEmpty) queryParams['search'] = search;
      queryParams['include_inactive'] = includeInactive;

      final response = await _apiClient.get(
        ApiEndpoints.warehouseLocations,
        queryParameters: queryParams,
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        // API 응답 구조를 DTO에 맞게 변환
        final List<dynamic> dataList = response.data['data'];
        final pagination = response.data['pagination'] ?? {};
        
        final listData = {
          'items': dataList,
          'total': pagination['total'] ?? 0,
          'page': pagination['page'] ?? 1,
          'per_page': pagination['per_page'] ?? 20,
          'total_pages': pagination['total_pages'] ?? 1,
        };
        
        return WarehouseLocationListDto.fromJson(listData);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? 'Failed to fetch warehouse locations',
        );
      }
    } catch (e) {
      throw _handleError(e);
    }
  }

  @override
  Future<WarehouseLocationDto> getWarehouseLocationById(int id) async {
    try {
      final response = await _apiClient.get(
        '${ApiEndpoints.warehouseLocations}/$id',
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return WarehouseLocationDto.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? 'Failed to fetch warehouse location',
        );
      }
    } catch (e) {
      throw _handleError(e);
    }
  }

  @override
  Future<WarehouseLocationDto> createWarehouseLocation(CreateWarehouseLocationRequest request) async {
    try {
      final response = await _apiClient.post(
        ApiEndpoints.warehouseLocations,
        data: request.toJson(),
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return WarehouseLocationDto.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? 'Failed to fetch warehouse location',
        );
      }
    } catch (e) {
      throw _handleError(e);
    }
  }

  @override
  Future<WarehouseLocationDto> updateWarehouseLocation(int id, UpdateWarehouseLocationRequest request) async {
    try {
      final response = await _apiClient.put(
        '${ApiEndpoints.warehouseLocations}/$id',
        data: request.toJson(),
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return WarehouseLocationDto.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? 'Failed to fetch warehouse location',
        );
      }
    } catch (e) {
      throw _handleError(e);
    }
  }

  @override
  Future<void> deleteWarehouseLocation(int id) async {
    try {
      await _apiClient.delete(
        '${ApiEndpoints.warehouseLocations}/$id',
      );
    } catch (e) {
      throw _handleError(e);
    }
  }

  @override
  Future<WarehouseEquipmentListDto> getWarehouseEquipment(
    int warehouseId, {
    int page = 1,
    int perPage = 20,
  }) async {
    try {
      final queryParams = <String, dynamic>{
        'page': page,
        'per_page': perPage,
      };

      final response = await _apiClient.get(
        '${ApiEndpoints.warehouseLocations}/$warehouseId/equipment',
        queryParameters: queryParams,
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return WarehouseEquipmentListDto.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? 'Failed to fetch warehouse equipment',
        );
      }
    } catch (e) {
      throw _handleError(e);
    }
  }

  @override
  Future<WarehouseCapacityInfo> getWarehouseCapacity(int id) async {
    try {
      final response = await _apiClient.get(
        '${ApiEndpoints.warehouseLocations}/$id/capacity',
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return WarehouseCapacityInfo.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? 'Failed to fetch warehouse capacity',
        );
      }
    } catch (e) {
      throw _handleError(e);
    }
  }

  @override
  Future<List<WarehouseLocationDto>> getInUseWarehouseLocations() async {
    try {
      final response = await _apiClient.get(
        '${ApiEndpoints.warehouseLocations}/in-use',
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] is List) {
        return (response.data['data'] as List)
            .map((item) => WarehouseLocationDto.fromJson(item))
            .toList();
      } else {
        throw ApiException(message: 'Invalid response format');
      }
    } catch (e) {
      throw _handleError(e);
    }
  }

  Exception _handleError(dynamic error) {
    if (error is ApiException) {
      return error;
    }
    return ApiException(
      message: error.toString(),
    );
  }
}