import type { LogLevel } from "../../types/index.js";
/**
 * LoggerService - Singleton para logging
 * Aplica el patrón Singleton para garantizar una única instancia de logger.
 */
export declare class LoggerService {
    private static instance;
    /** Optional prefix prepended to every message. Empty = no prefix (default). */
    private context;
    /**
     * Constructor privado - enforce singleton
     */
    private constructor();
    /**
     * Obtiene la instancia única del LoggerService (Singleton)
     */
    static getInstance(): LoggerService;
    /**
     * Configura el prefijo de contexto. Vacío ("") lo elimina.
     */
    useSetContext(context: string): void;
    /** Builds the effective message: `[context] message` only when a context is set. */
    private useFormat;
    /**
     * Logs a message with optional data and level.
     * Maps directly onto the native `console` methods (`log`, `warn`, `error`).
     *
     * @param message - The message to log.
     * @param data - Optional data to attach to the log.
     * @param level - The log level. Defaults to `"log"`.
     *
     * @example
     * ```ts
     * import { useLogger } from "katanakit-js";
     *
     * useLogger("Application started");
     * useLogger("Cache miss", undefined, "warn");
     * useLogger("Database timeout", { query: "SELECT 1" }, "error");
     * ```
     */
    useLog(message: string, data?: unknown, level?: LogLevel): void;
    /**
     * Logs a message at the "warn" level.
     *
     * @param message - The message to log.
     * @param data - Optional data to attach to the log.
     *
     * @example
     * ```ts
     * useLogWarn("Cache miss", { key: "user:123" });
     * ```
     */
    useLogWarn(message: string, data?: unknown): void;
    /**
     * Logs a message at the "error" level.
     *
     * @param message - The message to log.
     * @param data - Optional error data to attach to the log.
     *
     * @example
     * ```ts
     * useLogError("Database timeout", { query: "SELECT 1", duration: 5000 });
     * ```
     */
    useLogError(message: string, data?: unknown): void;
    /**
     * Clears the console.
     *
     * @example
     * ```ts
     * useLoggerClear();
     * ```
     */
    useClear(): void;
    /**
     * Displays tabular data in the console.
     *
     * @param data - The data to display as a table.
     *
     * @example
     * ```ts
     * useLoggerTable([{ id: 1, name: "Alice" }, { id: 2, name: "Bob" }]);
     * ```
     */
    useTable(data: unknown): void;
}
/**
 * Wrapper para LoggerService - mantiene backward compatibility
 */
export declare function useLogger(message: string, data?: unknown, level?: LogLevel): void;
/**
 * Wrapper para LoggerService - mantiene backward compatibility
 */
export declare function useLoggerWarn(message: string, data?: unknown): void;
/**
 * Wrapper para LoggerService - mantiene backward compatibility
 */
export declare function useLoggerError(message: string, data?: unknown): void;
/**
 * Wrapper para LoggerService - mantiene backward compatibility
 */
export declare function useLoggerClear(): void;
/**
 * Wrapper para LoggerService - mantiene backward compatibility
 */
export declare function useLoggerTable(data: unknown): void;
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