import { fs } from "@spinajs/fs";
import { Log, IFileTargetOptions } from "@spinajs/log-common";
/**
 * Shared context handed to every archive / retention strategy.
 *
 * It exposes the filesystems and paths a strategy needs, plus the two
 * cross-cutting hooks it must go through:
 *
 *  - `rotate()`   - perform a single rotation ( owned by LogArchiveService ),
 *  - `withWriteLock()` - run a critical section under the target write-lock so
 *    a rename never races an in-flight append.
 */
export interface ILogArchiveContext {
    /**
     * Filesystem holding the ACTIVE log file.
     */
    fs: fs;
    /**
     * Filesystem archives ( rotated / zipped files ) are moved to. Defaults to
     * the same provider as `fs`.
     */
    archiveFs: fs;
    /**
     * Path ( relative to `fs` base path ) of the active log file.
     */
    activePath: string;
    /**
     * Directory ( relative to `archiveFs` base path ) archives are stored in.
     */
    archiveDir: string;
    /**
     * Resolved file target options ( maxSize, maxAge, compress, ... ).
     */
    options: IFileTargetOptions["options"];
    /**
     * Target logger, used for diagnostics.
     */
    logger: Log;
    /**
     * Perform a single rotation of the active log file. Implemented by
     * LogArchiveService - strategies call this from their schedule.
     */
    rotate(): Promise<void>;
    /**
     * Run `fn` under the target write-lock so it cannot overlap with an
     * in-flight append / flush.
     */
    withWriteLock<T>(fn: () => Promise<T>): Promise<T>;
}
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