//#region src/logger/logger.d.ts
/** Logger interface and built-in implementations. */
/** Supported log levels in order of increasing severity. */
type Level = 'debug' | 'info' | 'warn' | 'error' | 'off';
/**
 * A logger that receives messages at different severity levels.
 *
 * The method signatures are intentionally compatible with the global
 * {@link Console} object so that `console` can be used as a Logger when level
 * filtering is not needed.
 */
interface Logger {
  /** Logs a debug-level message. */
  debug(message: string, ...args: unknown[]): void;
  /** Logs an info-level message. */
  info(message: string, ...args: unknown[]): void;
  /** Logs a warn-level message. */
  warn(message: string, ...args: unknown[]): void;
  /** Logs an error-level message. */
  error(message: string, ...args: unknown[]): void;
}
/** A logger that silently discards all messages. */
declare class NoOpLogger implements Logger {
  debug(): void;
  info(): void;
  warn(): void;
  error(): void;
}
/**
 * A decorator that adds level filtering to any {@link Logger}.
 *
 * Only messages at or above the configured minimum level are forwarded to the
 * underlying logger. The default underlying logger is `console`.
 *
 * @example
 * ```typescript
 * // Only warn and error go to console.
 * const logger = new LogLevel('warn');
 * ```
 */
declare class LogLevel implements Logger {
  private readonly threshold;
  private readonly logger;
  constructor(level: Level, logger?: Logger);
  debug(message: string, ...args: unknown[]): void;
  info(message: string, ...args: unknown[]): void;
  warn(message: string, ...args: unknown[]): void;
  error(message: string, ...args: unknown[]): void;
}
//#endregion
export { Level, LogLevel, Logger, NoOpLogger };
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