import { AppContext } from "./app-context.js";
interface MutableLRUParam<T, K> {
    evict: (param: LRUParam<T, K>, newItem: T, map: LRUMap<K, T>) => boolean;
    refresh: (param: LRUParam<T, K>, map: LRUMap<K, T>) => void;
    maxEntries: number;
    maxAge: number;
}
export type LRUParam<T = string, K = string> = Readonly<MutableLRUParam<T, K>>;
export declare class LRUSet<T> {
    #private;
    constructor(param?: Partial<LRUParam<T, T>>);
    setParam(param?: Partial<LRUParam<T, T>>): void;
    get size(): number;
    has(key: T): boolean;
    add(key: T): void;
    delete(key: T): void;
    clear(): void;
    forEach(callbackfn: (value: T, key: T) => void): void;
    entries(): IterableIterator<[T, T, LRUCtx<T, T>]>;
}
export type LRUWithIdx<T> = T & {
    readonly idx: number;
};
export interface LRUCtx<T, K> {
    readonly update: boolean;
    readonly ref: LRUMap<K, T>;
    readonly stats: LRUMap<T, K>["stats"];
    readonly item: LRUItem<T>;
}
export interface LRUItem<V> {
    readonly value: V;
    ctx?: AppContext;
}
export type LRUMapFn<K, T> = (value: T, key: K, meta: LRUCtx<K, T>) => void;
export type UnregFn = () => void;
export declare class LRUMap<K, V> {
    private _map;
    private param;
    readonly stats: {
        gets: number;
        puts: number;
        deletes: number;
    };
    constructor(c?: Partial<LRUParam<V, K>>);
    private _onSetFns;
    onSet(fn: LRUMapFn<V, K>): UnregFn;
    private _onDeleteFns;
    onDelete(fn: LRUMapFn<V, K>): UnregFn;
    private touch;
    setParam(param?: Partial<LRUParam<V, K>>): void;
    keys(): IterableIterator<K>;
    has(key: K): boolean;
    get size(): number;
    getSet(key: K, createFN: (key: K) => Promise<V>): Promise<V | undefined>;
    get(key: K): V | undefined;
    getItem(key: K): LRUItem<V> | undefined;
    private buildItem;
    set(key: K, value: V): void;
    private buildItemCtx;
    delete(key: K): void;
    clear(): void;
    forEach(fn: (value: V, key: K, ctx: LRUWithIdx<LRUCtx<V, K>>) => void): void;
    entries(): IterableIterator<[K, V, LRUCtx<V, K>]>;
}
export {};
//# sourceMappingURL=lru-map-set.d.ts.map