import 'package:dio/dio.dart';
import 'package:injectable/injectable.dart';
import 'package:superport/core/errors/exceptions.dart';
import 'package:superport/data/datasources/remote/api_client.dart';
import 'package:superport/data/models/user/user_dto.dart';

abstract class UserRemoteDataSource {
  Future<UserListDto> getUsers({
    int page = 1,
    int perPage = 20,
    bool? isActive,
    int? companyId,
    String? role,
    bool includeInactive = false,
  });
  
  Future<UserDto> getUser(int id);
  Future<UserDto> createUser(CreateUserRequest request);
  Future<UserDto> updateUser(int id, UpdateUserRequest request);
  Future<void> deleteUser(int id);
  Future<UserDto> changeUserStatus(int id, ChangeStatusRequest request);
  Future<void> changePassword(int id, ChangePasswordRequest request);
  Future<bool> checkDuplicateUsername(String username);
  Future<UserListDto> searchUsers({
    required String query,
    int? companyId,
    String? status,
    String? permissionLevel,
    int page = 1,
    int perPage = 20,
  });
}

@LazySingleton(as: UserRemoteDataSource)
class UserRemoteDataSourceImpl implements UserRemoteDataSource {
  final ApiClient _apiClient;

  UserRemoteDataSourceImpl(this._apiClient);

  /// 사용자 목록 조회
  Future<UserListDto> getUsers({
    int page = 1,
    int perPage = 20,
    bool? isActive,
    int? companyId,
    String? role,
    bool includeInactive = false,
  }) async {
    try {
      final queryParams = {
        'page': page,
        'per_page': perPage,
        if (isActive != null) 'is_active': isActive,
        if (companyId != null) 'company_id': companyId,
        if (role != null) 'role': role,
        'include_inactive': includeInactive,
      };

      final response = await _apiClient.get(
        '/users',
        queryParameters: queryParams,
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        // API 응답이 배열인 경우와 객체인 경우를 모두 처리
        final data = response.data['data'];
        if (data is List) {
          // 배열 응답을 UserListDto 형식으로 변환
          // role이 null인 경우 기본값 설정
          final users = data.map((json) {
            if (json['role'] == null) {
              json['role'] = 'member'; // 기본값
            }
            return UserDto.fromJson(json);
          }).toList();
          final pagination = response.data['pagination'] ?? {};
          return UserListDto(
            users: users,
            total: pagination['total'] ?? users.length,
            page: pagination['page'] ?? page,
            perPage: pagination['per_page'] ?? perPage,
            totalPages: pagination['total_pages'] ?? 1,
          );
        } else if (data['users'] != null) {
          // 이미 UserListDto 형식인 경우
          return UserListDto.fromJson(data);
        } else {
          // 예상치 못한 형식인 경우
          throw ApiException(
            message: 'Unexpected response format for user list',
          );
        }
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? '사용자 목록을 불러오는데 실패했습니다',
        );
      }
    } on DioException catch (e) {
      throw ApiException(
        message: e.response?.data['message'] ?? '사용자 목록을 불러오는데 실패했습니다',
        statusCode: e.response?.statusCode,
      );
    }
  }

  /// 특정 사용자 조회
  Future<UserDto> getUser(int id) async {
    try {
      final response = await _apiClient.get('/users/$id');
      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return UserDto.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? '사용자 정보를 불러오는데 실패했습니다',
        );
      }
    } on DioException catch (e) {
      throw ApiException(
        message: e.response?.data['message'] ?? '사용자 정보를 불러오는데 실패했습니다',
        statusCode: e.response?.statusCode,
      );
    }
  }

  /// 사용자 생성
  Future<UserDto> createUser(CreateUserRequest request) async {
    try {
      final response = await _apiClient.post(
        '/users',
        data: request.toJson(),
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return UserDto.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? '사용자 정보를 불러오는데 실패했습니다',
        );
      }
    } on DioException catch (e) {
      throw ApiException(
        message: e.response?.data['message'] ?? '사용자 생성에 실패했습니다',
        statusCode: e.response?.statusCode,
      );
    }
  }

  /// 사용자 정보 수정
  Future<UserDto> updateUser(int id, UpdateUserRequest request) async {
    try {
      final response = await _apiClient.put(
        '/users/$id',
        data: request.toJson(),
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return UserDto.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? '사용자 정보를 불러오는데 실패했습니다',
        );
      }
    } on DioException catch (e) {
      throw ApiException(
        message: e.response?.data['message'] ?? '사용자 정보 수정에 실패했습니다',
        statusCode: e.response?.statusCode,
      );
    }
  }

  /// 사용자 삭제
  Future<void> deleteUser(int id) async {
    try {
      await _apiClient.delete('/users/$id');
    } on DioException catch (e) {
      throw ApiException(
        message: e.response?.data['message'] ?? '사용자 삭제에 실패했습니다',
        statusCode: e.response?.statusCode,
      );
    }
  }

  /// 사용자 상태 변경 (활성/비활성)
  Future<UserDto> changeUserStatus(int id, ChangeStatusRequest request) async {
    try {
      final response = await _apiClient.patch(
        '/users/$id/status',
        data: request.toJson(),
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return UserDto.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? '사용자 정보를 불러오는데 실패했습니다',
        );
      }
    } on DioException catch (e) {
      throw ApiException(
        message: e.response?.data['message'] ?? '사용자 상태 변경에 실패했습니다',
        statusCode: e.response?.statusCode,
      );
    }
  }

  /// 비밀번호 변경
  Future<void> changePassword(int id, ChangePasswordRequest request) async {
    try {
      await _apiClient.put(
        '/users/$id/password',
        data: request.toJson(),
      );
    } on DioException catch (e) {
      throw ApiException(
        message: e.response?.data['message'] ?? '비밀번호 변경에 실패했습니다',
        statusCode: e.response?.statusCode,
      );
    }
  }

  /// 사용자명 중복 확인
  Future<bool> checkDuplicateUsername(String username) async {
    try {
      final response = await _apiClient.get(
        '/users/check-duplicate',
        queryParameters: {'username': username},
      );

      return response.data['is_duplicate'] ?? false;
    } on DioException catch (e) {
      throw ApiException(
        message: e.response?.data['message'] ?? '중복 확인에 실패했습니다',
        statusCode: e.response?.statusCode,
      );
    }
  }

  /// 사용자 검색
  Future<UserListDto> searchUsers({
    required String query,
    int? companyId,
    String? status,
    String? permissionLevel,
    int page = 1,
    int perPage = 20,
  }) async {
    try {
      final queryParams = {
        'q': query,
        'page': page,
        'per_page': perPage,
        if (companyId != null) 'company_id': companyId,
        if (status != null) 'status': status,
        if (permissionLevel != null) 'permission_level': permissionLevel,
      };

      final response = await _apiClient.get(
        '/users/search',
        queryParameters: queryParams,
      );

      if (response.data != null && response.data['success'] == true && response.data['data'] != null) {
        return UserListDto.fromJson(response.data['data']);
      } else {
        throw ApiException(
          message: response.data?['error']?['message'] ?? '사용자 목록을 불러오는데 실패했습니다',
        );
      }
    } on DioException catch (e) {
      throw ApiException(
        message: e.response?.data['message'] ?? '사용자 검색에 실패했습니다',
        statusCode: e.response?.statusCode,
      );
    }
  }
}