import type { z } from "zod";
import type { FetchResult } from "../../types/index.js";
/**
 * ValidationService - Singleton para validaciones.
 *
 * Aplica el patrón Singleton: una única instancia que centraliza la
 * validación de datos desconocidos (respuestas de API, configs, input de
 * usuario) contra esquemas Zod devolviendo Safe Results en vez de lanzar
 * excepciones. Puro y sin I/O, seguro para SSR.
 */
export declare class ValidationService {
    private static instance;
    /**
     * Constructor privado - enforce singleton.
     */
    private constructor();
    /**
     * Obtiene la instancia única del ValidationService (Singleton).
     *
     * @returns La instancia única de {@link ValidationService}.
     *
     * @example
     * ```ts
     * const validator = ValidationService.getInstance();
     * validator.useValidate(SmartVideoOptionsSchema, raw);
     * ```
     */
    static getInstance(): ValidationService;
    /**
     * Validates unknown data (API responses, configs, user input) against a
     * Zod schema and returns a Safe Result instead of throwing.
     * Framework-agnostic and pure: no I/O, SSR-safe.
     *
     * @typeParam T - The validated output type (`z.infer` of the schema).
     * @param schema - Any Zod schema.
     * @param data - Unknown input to validate.
     * @returns `FetchResult<T>` with typed data or a `Validation Error`.
     *
     * @example
     * ```ts
     * import { SmartVideoOptionsSchema } from "katanakit-js/schemas";
     *
     * const result = useValidate(SmartVideoOptionsSchema, JSON.parse(raw));
     * if (result.ok) useBuildVideoEmbed(result.data);
     * ```
     */
    useValidate<T>(schema: z.ZodType<T>, data: unknown): FetchResult<T>;
}
/**
 * Validates unknown data against a Zod schema and returns a Safe Result.
 * Wrapper sobre {@link ValidationService} (backward compatibility).
 *
 * @typeParam T - The validated output type (`z.infer` of the schema).
 * @param schema - Any Zod schema.
 * @param data - Unknown input to validate.
 * @returns `FetchResult<T>` with typed data or a `Validation Error`.
 *
 * @example
 * ```ts
 * import { SmartVideoOptionsSchema } from "katanakit-js/schemas";
 *
 * const result = useValidate(SmartVideoOptionsSchema, JSON.parse(raw));
 * if (result.ok) useBuildVideoEmbed(result.data);
 * ```
 */
export declare function useValidate<T>(schema: z.ZodType<T>, data: unknown): FetchResult<T>;
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