import { HttpContextToken, HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';
import { OnDestroy } from '@angular/core';
import { Observable } from 'rxjs';
import { SCCacheConfigService } from '../core/sc-cache-config.service';
import * as i0 from "@angular/core";
export declare const FORCE_UPDATE: HttpContextToken<boolean>;
export declare const ENABLE_CACHE: HttpContextToken<boolean>;
export declare const SKIP_CACHE: HttpContextToken<boolean>;
export declare const CACHE_DURATION: HttpContextToken<number>;
export declare class CacheInterceptor implements HttpInterceptor, OnDestroy {
    private scCacheConfigService;
    private cache;
    private isConfigLoaded;
    private isCacheActive;
    private configSubscription;
    private cleanupInterval;
    constructor(scCacheConfigService: SCCacheConfigService);
    ngOnDestroy(): void;
    intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;
    private findMatchingCacheConfig;
    private convertPatternToRegex;
    private getCacheKey;
    private getValidCachedResponse;
    private handleForceUpdate;
    private manageCacheSize;
    getCacheStats(): {
        size: number;
        entries: Array<{
            url: string;
            age: number;
            hits: number;
        }>;
    };
    clearCacheForPattern(pattern: string): void;
    clearExpiredCache(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<CacheInterceptor, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<CacheInterceptor>;
}