import type { JsonObject } from './types';

export function asString(value: unknown): string | undefined {
  if (typeof value !== 'string') return undefined;
  const trimmed = value.trim();
  return trimmed ? trimmed : undefined;
}

export function isRecord(value: unknown): value is JsonObject {
  return typeof value === 'object' && value !== null && !Array.isArray(value);
}

export function compactObject<T extends Record<string, unknown>>(input: T): Partial<T> {
  const output: Partial<T> = {};
  for (const [key, value] of Object.entries(input)) {
    if (value !== undefined) {
      output[key as keyof T] = value as T[keyof T];
    }
  }
  return output;
}

export function truncateText(text: string, maxCharacters: number): string {
  if (text.length <= maxCharacters) return text;
  return `${text.slice(0, Math.max(0, maxCharacters - 1)).trimEnd()}…`;
}