import type { StringableContent } from '../context/flowr-file';
/**
 * Invalidation events describe how the cached analyzer state became stale.
 *
 * The current codebase triggers these events in two main ways:
 * - {@link InvalidationEventType.Full}: emitted by explicit reset flows such as
 *   {@link FlowrAnalyzerContext#reset} or {@link FlowrAnalyzerCache#reset}. Use this
 *   when the whole project state should be treated as stale.
 * - {@link InvalidationEventType.SingleFileInvalidate}: emitted by
 *   {@link FlowrFile#invalidate}, including {@link FlowrInlineTextFile#updateInlineContent},
 *   when one known file changed.
 */
export declare const enum InvalidationEventType {
    Full = "full",
    SingleFileInvalidate = "single-file-invalidate"
}
/**
 * Invalidation event for a single file identified by {@link filePath}.
 *
 * {@link oldContent} contains the file content from immediately before the
 * change that triggered this event. In other words, it is the pre-change content
 * for this invalidation, not necessarily the content from the last completed
 * analysis run.
 */
export interface SingleFileInvalidationEvent<Content extends StringableContent = StringableContent> {
    readonly type: InvalidationEventType.SingleFileInvalidate;
    readonly oldContent: Content | undefined;
    readonly filePath: string;
}
export type InvalidationEvent<Content extends StringableContent = StringableContent> = {
    type: InvalidationEventType.Full;
} | SingleFileInvalidationEvent<Content>;
export type InvalidationEventHandler<Content extends StringableContent = StringableContent> = (event: InvalidationEvent<Content>) => void;
export interface InvalidationEventReceiver<Content extends StringableContent = StringableContent> {
    receive: InvalidationEventHandler<Content>;
}
/**
 * Central class for caching analysis results in FlowR.
 */
export declare abstract class FlowrCache<Cache> implements InvalidationEventReceiver {
    private value;
    private dependents;
    registerDependent(dependent: InvalidationEventReceiver): void;
    removeDependent(dependent: InvalidationEventReceiver): void;
    receive(event: InvalidationEvent): void;
    /**
     * Notify all dependents of a cache invalidation event.
     */
    notifyDependents(event: InvalidationEvent): void;
    /**
     * Get the cached value or compute it if not present.
     * This will, by default, not trigger any {@link notifyDependents} calls, as this is only a cache retrieval.
     */
    protected computeIfAbsent(force: boolean | undefined, compute: () => Cache): Cache;
}