import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent } from '@angular/common/http';
import { Observable } from 'rxjs';
import { OpenCageConfigService } from '../services/opencage-config.service';
import * as i0 from "@angular/core";
/**
 * OpenCage HTTP Interceptor
 * Automatically handles API key injection and standardized error handling
 */
export declare class OpenCageInterceptor implements HttpInterceptor {
    private configService;
    constructor(configService: OpenCageConfigService);
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;
    /**
     * Check if request is to OpenCage API
     */
    private isOpenCageRequest;
    /**
     * Add API key to request
     */
    private addApiKey;
    /**
     * Add standard headers
     */
    private addHeaders;
    /**
     * Add User-Agent header
     */
    private addUserAgent;
    /**
     * Get User-Agent string
     */
    private getUserAgent;
    /**
     * Get Angular version (simplified)
     */
    private getAngularVersion;
    /**
     * Get browser information
     */
    private getBrowserInfo;
    /**
     * Log rate limit information
     */
    private logRateLimit;
    static ɵfac: i0.ɵɵFactoryDeclaration<OpenCageInterceptor, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<OpenCageInterceptor>;
}
/**
 * Provider for OpenCage interceptor
 */
export declare const openCageInterceptorProvider: {
    provide: string;
    useClass: typeof OpenCageInterceptor;
    multi: boolean;
};