/**
 * Defines the available logging levels as string literals.
 */
export declare const LogLevels: readonly ["trace", "debug", "info", "warn", "error", "none"];
/**
 * Type for LogLevel values
 */
export type LogLevel = typeof LogLevels[number];
/**
 * Interface for a logging backend implementation.
 * Backends handle the actual output of log messages.
 */
export interface LoggingBackend {
    /**
     * Log a message at TRACE level
     *
     * @param category - Typically the class or module name
     * @param message
     * @param args
     */
    trace(category: string, message: string, ...args: unknown[]): void;
    /**
     * Log a message at DEBUG level
     *
     * @param category - Typically the class or module name
     * @param message
     * @param args
     */
    debug(category: string, message: string, ...args: unknown[]): void;
    /**
     * Log a message at INFO level
     *
     * @param category - Typically the class or module name
     * @param message
     * @param args
     */
    info(category: string, message: string, ...args: unknown[]): void;
    /**
     * Log a message at WARN level
     *
     * @param category - Typically the class or module name
     * @param message
     * @param args
     */
    warn(category: string, message: string, ...args: unknown[]): void;
    /**
     * Log a message at ERROR level
     *
     * @param category - Typically the class or module name
     * @param message
     * @param args
     */
    error(category: string, message: string, ...args: unknown[]): void;
    /**
     * Start a timer with the specified label.
     *
     * @param category - Typically the class or module name
     * @param label - Must be unique; used to match with timeEnd()
     */
    time(category: string, label: string): void;
    /**
     * End a timer with the specified label and log the time elapsed.
     *
     * @param category - Typically the class or module name
     * @param label - Must match a previous time() call
     */
    timeEnd(category: string, label: string): void;
}
/**
 * Interface for a logger instance.
 * Each instance is typically associated with a specific category/component.
 */
export interface LoggerInterface {
    /** Log a message at TRACE level */
    trace(message: string, ...args: unknown[]): void;
    /** Log a message at DEBUG level */
    debug(message: string, ...args: unknown[]): void;
    /** Log a message at INFO level */
    info(message: string, ...args: unknown[]): void;
    /** Log a message at WARN level */
    warn(message: string, ...args: unknown[]): void;
    /** Log a message at ERROR level */
    error(message: string, ...args: unknown[]): void;
    /** Start a timer with the given label */
    time(label: string): void;
    /** End a timer and log the elapsed time */
    timeEnd(label: string): void;
}