import type { LogLevel } from "@qvac/logging";
/**
 * Log transport callback signature. Receives the log `level`, namespace
 * scoping the message, and the formatted `message`. May return a promise to
 * allow async backends (e.g., network sinks).
 */
export type LogTransport = (level: LogLevel, namespace: string, message: string) => void | Promise<void>;
export interface LoggerOptions {
    /** Minimum log level that will be emitted. */
    level?: LogLevel;
    /** Namespace prefix applied to every message emitted by this logger. */
    namespace?: string;
    /** Additional log transports to receive every emitted message. */
    transports?: LogTransport[];
    /** When `false`, disables the default console transport. */
    enableConsole?: boolean;
}
export interface Logger {
    /** Emits a message at the `error` level. */
    error: (...args: unknown[]) => void;
    /** Emits a message at the `warn` level. */
    warn: (...args: unknown[]) => void;
    /** Emits a message at the `info` level. */
    info: (...args: unknown[]) => void;
    /** Emits a message at the `debug` level. */
    debug: (...args: unknown[]) => void;
    /** Emits a message at the `trace` level. */
    trace: (...args: unknown[]) => void;
    /** Sets the logger's minimum log level. */
    setLevel: (level: LogLevel) => void;
    /** Returns the logger's current minimum log level. */
    getLevel: () => LogLevel;
    /** Registers an additional log transport with this logger. */
    addTransport: (transport: LogTransport) => void;
    /** Enables or disables this logger's default console transport. */
    setConsoleOutput: (enabled: boolean) => void;
}
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