import 'package:dio/dio.dart';

import '../../../../core/logging/logger.dart';
import '../../../../core/network/api_problem.dart';
import '../../../../data/network/api_client.dart';
import '../models/notification_item.dart';
import '../models/notification_list_result.dart';

class NotificationApi {
  NotificationApi({required ApiClient apiClient}) : _apiClient = apiClient;

  final ApiClient _apiClient;
  final Logger _logger = getLogger('features.notifications.data.apis');

  Future<NotificationListResult> listNotifications({
    int limit = 20,
    String? cursor,
  }) async {
    final queryParts = <String>['limit=$limit'];
    if (cursor != null) {
      queryParts.add('cursor=$cursor');
    }
    final path = '/api/v1/notifications?${queryParts.join("&")}';

    try {
      final json = await _apiClient.getJson(path);
      final itemsJson = json['items'] as List<dynamic>? ?? [];
      final items = itemsJson
          .map((e) => parseNotificationItem(e as Map<String, dynamic>))
          .toList();
      return NotificationListResult(
        items: items,
        nextCursor: json['nextCursor'] as String?,
        hasMore: json['hasMore'] as bool? ?? false,
      );
    } on DioException catch (error, stackTrace) {
      _logger.error(
        message: 'List notifications failed',
        error: error,
        stackTrace: stackTrace,
      );
      throw _mapProblem(error);
    }
  }

  Future<int> getUnreadCount() async {
    try {
      final json = await _apiClient.getJson(
        '/api/v1/notifications/unread-count',
      );
      return json['count'] as int? ?? 0;
    } on DioException catch (error, stackTrace) {
      _logger.error(
        message: 'Get unread count failed',
        error: error,
        stackTrace: stackTrace,
      );
      throw _mapProblem(error);
    }
  }

  Future<NotificationItem> markRead({required String notificationId}) async {
    _logger.info(
      message: 'Mark read request started',
      extra: {'notification_id': notificationId},
    );
    try {
      final response = await _apiClient.rawDio.patch<Map<String, dynamic>>(
        '/api/v1/notifications/$notificationId/read',
      );
      final item = parseNotificationItem(response.data!);
      _logger.info(
        message: 'Mark read request succeeded',
        extra: {'notification_id': notificationId, 'is_read': item.isRead},
      );
      return item;
    } on DioException catch (error, stackTrace) {
      _logger.error(
        message: 'Mark read failed',
        error: error,
        stackTrace: stackTrace,
      );
      throw _mapProblem(error);
    }
  }

  Future<int> markAllRead() async {
    _logger.info(message: 'Mark all read request started');
    try {
      final response = await _apiClient.rawDio.patch<Map<String, dynamic>>(
        '/api/v1/notifications/mark-all-read',
      );
      final updatedCount = response.data?['updatedCount'] as int? ?? 0;
      _logger.info(
        message: 'Mark all read request succeeded',
        extra: {'updated_count': updatedCount},
      );
      return updatedCount;
    } on DioException catch (error, stackTrace) {
      _logger.error(
        message: 'Mark all read failed',
        error: error,
        stackTrace: stackTrace,
      );
      throw _mapProblem(error);
    }
  }

  ApiProblem _mapProblem(DioException error) {
    final status = error.response?.statusCode ?? 500;
    final data = error.response?.data;

    if (data is Map<String, dynamic>) {
      return ApiProblem(
        status: status,
        title: (data['title'] as String?) ?? 'Request failed',
        detail: (data['detail'] as String?) ?? '',
        code: data['code'] as String?,
      );
    }

    return ApiProblem(
      status: status,
      title: 'Network error',
      detail: error.message ?? 'Request failed',
    );
  }
}