class ApiException implements Exception {
  const ApiException({
    this.statusCode,
    required this.message,
    this.retryAfterSeconds,
  });

  final int? statusCode;
  final String message;
  final int? retryAfterSeconds;

  bool get isUnauthorized => statusCode == 401;

  @override
  String toString() => message;

  static ApiException fromBody({
    int? statusCode,
    Object? body,
    String fallback = 'Something went wrong.',
  }) {
    var message = fallback;
    int? retryAfterSeconds;
    if (body is Map) {
      final error = body['error'];
      if (error is String && error.trim().isNotEmpty) {
        message = error.trim();
      }
      final retry = body['retryAfterSeconds'];
      if (retry is int) {
        retryAfterSeconds = retry;
      } else if (retry is num) {
        retryAfterSeconds = retry.toInt();
      }
    }
    if (retryAfterSeconds != null) {
      message = '$message Retry after $retryAfterSeconds seconds.';
    }
    return ApiException(
      statusCode: statusCode,
      message: message,
      retryAfterSeconds: retryAfterSeconds,
    );
  }
}