import type { Logger } from '@pikku/core/services';
import { LogLevel } from '@pikku/core/services';
import type { ErrorCode, DiagnosticSeverity, CodedDiagnostic } from '@pikku/inspector';
export type CLIOutputMode = 'text' | 'json';
export declare class CLILogger implements Logger {
    private silent;
    private level;
    private diagnostics;
    private failOn;
    private outputMode;
    private jsonFlushHookRegistered;
    constructor({ logLogo, silent, }: {
        logLogo: boolean;
        silent?: boolean;
    });
    setLevel(level: LogLevel): void;
    setSilent(silent: boolean): void;
    setOutputMode(mode: CLIOutputMode): void;
    getOutputMode(): CLIOutputMode;
    isSilent(): boolean;
    private normalizeMessage;
    private writeJSONLine;
    private ensureJSONFlushHook;
    flushJSONBuffer(): void;
    private emit;
    info(message: string | {
        message: string;
        type?: string;
        data?: Record<string, unknown>;
    }): void;
    error(message: string | Error | {
        message: string;
        type?: string;
        data?: Record<string, unknown>;
    }): void;
    warn(message: string | {
        message: string;
        type?: string;
        data?: Record<string, unknown>;
    }): void;
    debug(message: string | {
        message: string;
        type?: string;
        data?: Record<string, unknown>;
    }): void;
    diagnostic({ severity, code, message }: CodedDiagnostic): void;
    /** Sugar for `diagnostic({ severity: 'critical', code, message })`. */
    critical(code: ErrorCode, message: string): void;
    /**
     * Configure which severities fail the build. Critical is always included.
     */
    setFailOn(severities: Iterable<DiagnosticSeverity>): void;
    hasCriticalErrors(): boolean;
    /**
     * True if any tracked diagnostic matches a severity configured to fail the
     * build (default: critical only).
     */
    hasBlockingDiagnostics(): boolean;
    /** Distinct severities among tracked diagnostics that would fail the build. */
    blockingSeverities(): DiagnosticSeverity[];
    logLogo(): void;
}