import { Log } from "@spinajs/log-common";
import { ILogArchiveContext } from "./context.js";
/**
 * Rotation policy for a file log target. Decides WHEN the active log file is
 * rotated ( moved to the archive ) and owns its own schedule - the scheduling
 * mechanism ( interval, cron, ... ) is strategy specific and implemented in
 * `start` / `stop`.
 *
 * Mirrors the shape of fs `TempCleanupStrategy`: strategies hold per-target
 * scheduling state, so implementations MUST be registered with `@NewInstance()`
 * - otherwise a single instance would be shared between all file targets.
 */
export declare abstract class LogArchiveStrategy {
    protected Logger: Log;
    /**
     * Starts scheduled rotation. How rotations are scheduled is up to the
     * strategy.
     *
     * @param ctx archive context of the file target
     */
    abstract start(ctx: ILogArchiveContext): void;
    /**
     * Stops scheduled rotation. Safe to call multiple times.
     */
    abstract stop(): void;
    /**
     * Single rotation trigger guarded against errors - a failed rotation ( disk
     * full, remote backend down, ... ) must never crash the scheduler tick.
     */
    protected triggerRotation(ctx: ILogArchiveContext): Promise<void>;
}
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