export declare const LOG_LEVELS: readonly ["error", "warn", "info", "http", "verbose", "debug"];
export type LogLevel = (typeof LOG_LEVELS)[number];
export interface Logger {
    log(level: string, message: string, ...args: unknown[]): void;
    error(message: string | Error, ...args: unknown[]): void;
    warn(message: string, ...args: unknown[]): void;
    info(message: string, ...args: unknown[]): void;
    http(message: string, ...args: unknown[]): void;
    verbose(message: string, ...args: unknown[]): void;
    debug(message: string, ...args: unknown[]): void;
    child?(bindings: Record<string, unknown>): Logger;
}
export declare namespace Logger {
    const Token = "Logger";
}
export interface ConsoleLoggerOptions {
    level?: LogLevel;
    context?: Record<string, unknown>;
    format?: "json" | "pretty" | "auto";
    write?: (line: string) => void;
}
export declare class ConsoleLogger implements Logger {
    private readonly level;
    private readonly context;
    private readonly format;
    private readonly write;
    constructor(options?: ConsoleLoggerOptions);
    log(level: string, message: string, ...args: unknown[]): void;
    error(message: string | Error, ...args: unknown[]): void;
    warn(message: string, ...args: unknown[]): void;
    info(message: string, ...args: unknown[]): void;
    http(message: string, ...args: unknown[]): void;
    verbose(message: string, ...args: unknown[]): void;
    debug(message: string, ...args: unknown[]): void;
    child(bindings: Record<string, unknown>): Logger;
    private emit;
}
export declare class NoopLogger implements Logger {
    log(_level: string, _message: string, ..._args: unknown[]): void;
    error(_message: string | Error, ..._args: unknown[]): void;
    warn(_message: string, ..._args: unknown[]): void;
    info(_message: string, ..._args: unknown[]): void;
    http(_message: string, ..._args: unknown[]): void;
    verbose(_message: string, ..._args: unknown[]): void;
    debug(_message: string, ..._args: unknown[]): void;
    child(_bindings: Record<string, unknown>): Logger;
}