import type { ToString, LogData, LogRecord, LogFormatter } from './types.js';
import type Handler from './Handler.js';
import { LogLevel } from './types.js';
declare class Logger {
    readonly key: string;
    level: LogLevel;
    filter?: RegExp;
    readonly keys: string;
    readonly handlers: Set<Handler>;
    readonly parent?: Logger;
    protected _loggers: Map<string, WeakRef<Logger>>;
    protected loggersRegistry: FinalizationRegistry<string>;
    constructor(key?: string, level?: LogLevel, handlers?: Array<Handler>, parent?: Logger);
    get loggers(): Map<string, Logger>;
    getChild(key: string): Logger;
    getParent(): Logger | undefined;
    setLevel(level: LogLevel): void;
    getEffectiveLevel(): LogLevel;
    isEnabledFor(level: LogLevel): boolean;
    addHandler(handler: Handler): void;
    removeHandler(handler: Handler): void;
    clearHandlers(): void;
    hasHandlers(): boolean;
    setFilter(filter: RegExp): void;
    unsetFilter(): void;
    debug(msg?: ToString, format?: LogFormatter): void;
    debug(msg: ToString | undefined, data: LogData, format?: LogFormatter): void;
    info(msg?: ToString, format?: LogFormatter): void;
    info(msg: ToString | undefined, data: LogData, format?: LogFormatter): void;
    warn(msg?: ToString, format?: LogFormatter): void;
    warn(msg: ToString | undefined, data: LogData, format?: LogFormatter): void;
    error(msg?: ToString, format?: LogFormatter): void;
    error(msg: ToString | undefined, data: LogData, format?: LogFormatter): void;
    protected log(msg: ToString | undefined, data: LogData, level: LogLevel, format?: LogFormatter): void;
    /**
     * Constructs a `LogRecord`
     * The `LogRecord` can contain lazy values via wrapping with a lambda
     * This improves performance as they are not evaluated unless needed during formatting
     */
    protected makeRecord(msg: ToString | undefined, data: LogData, level: LogLevel): LogRecord;
    protected callHandlers(record: LogRecord, level: LogLevel, format?: LogFormatter, keys?: string): void;
}
export default Logger;