import type { LogLevel, LogSubscriber } from "./log-buffer.js";
/** Configuration used by file log. */
export interface FileLogConfig {
    enabled: boolean;
    path: string;
    maxSize: number | string;
    /** Total retained files, including the active log file. */
    maxFiles: number;
    level: LogLevel;
    format: "json" | "text";
}
/** Parses max size. */
export declare function parseMaxSize(value: number | string): number;
/** Writes every byte, including when the underlying writer makes partial progress. */
export declare function writeAll(writer: {
    write(bytes: Uint8Array): Promise<number>;
}, bytes: Uint8Array): Promise<void>;
/** Implement file log subscriber. */
export declare class FileLogSubscriber {
    private file;
    private currentSize;
    private writeQueue;
    private pendingFailures;
    private pendingWrites;
    private omittedFailureCount;
    private queueGeneration;
    private activeFlush;
    private closePromise;
    private maxSizeBytes;
    private minLevel;
    private formatter;
    private closed;
    private permissionFailed;
    private reportingFailure;
    private config;
    private readonly encoder;
    constructor(config: FileLogConfig);
    getSubscriber(): LogSubscriber;
    private enqueue;
    private recordFailure;
    private writeEntry;
    private disableForPermissionFailure;
    private rollbackPartialRecord;
    private openFile;
    private ensureDir;
    private reportFailure;
    private closeCurrentFile;
    private closeCurrentFileQuietly;
    private closeCurrentFileForShutdown;
    private rotate;
    flush(): Promise<void>;
    private performFlush;
    close(): Promise<void>;
    private throwFailures;
}
/** Create file log subscriber. */
export declare function createFileLogSubscriber(config: FileLogConfig): FileLogSubscriber;
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