import { record } from '@synnaxlabs/x';
import { Meta } from './meta';
export declare const LOG_LEVELS: readonly ["debug", "info", "warn", "error"];
export type LogLevel = (typeof LOG_LEVELS)[number];
export interface LogLevelFilterProps {
    key: string;
    path: string;
    level: LogLevel;
}
type KV = record.Unknown | (() => record.Unknown);
/**
 * LogLevelFilter is a function that returns true if the log at the given
 * level should be emitted.
 */
export type LogLevelFilter = (props: LogLevelFilterProps) => boolean;
export declare const logThresholdFilter: (thresh: LogLevel) => LogLevelFilter;
export interface LogLevelKeyFilterProps {
    include?: string[];
    exclude?: string[];
}
export declare const logLevelKeyFiler: (props: LogLevelKeyFilterProps) => LogLevelFilter;
export interface LoggerProps {
    filters?: LogLevelFilter[];
}
export declare class Logger {
    meta: Meta;
    filters: LogLevelFilter[];
    constructor(p?: LoggerProps);
    private filter;
    child(meta: Meta): Logger;
    debug(msg: string, kv?: KV, force?: boolean): void;
    info(msg: string, kv?: KV, force?: boolean): void;
    warn(msg: string, kv?: KV, force?: boolean): void;
    error(msg: string, kv?: KV, force?: boolean): void;
    static readonly NOOP: Logger;
}
export {};
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