import type Logger from './Logger.js';
declare enum LogLevel {
    NOTSET = 0,
    DEBUG = 1,
    INFO = 2,
    WARN = 3,
    ERROR = 4,
    SILENT = 100
}
interface ToString {
    toString: () => string;
}
interface ToJSON {
    toJSON: (key?: string) => string;
}
type LogDataKey = string | number;
/**
 * Custom log data values
 * Values can be made lazy by wrapping it as a lambda
 */
type LogDataValue = number | string | boolean | null | undefined | ToJSON | (() => LogDataValue) | Array<LogDataValue> | {
    [key: LogDataKey]: LogDataValue;
};
/**
 * Custom log data
 */
type LogData = Record<LogDataKey, LogDataValue>;
/**
 * Finalised log records
 */
type LogRecord = {
    logger: Logger;
    key: string;
    keys: string;
    level: LogLevel;
    msg: string | undefined;
    data: LogData;
    date: () => Date;
    stack: () => string;
};
type LogFormatter = (record: LogRecord) => string;
export { LogLevel };
export type { ToString, ToJSON, LogDataKey, LogDataValue, LogData, LogRecord, LogFormatter, };