/**
 * Configuration service for OpenCage Angular SDK
 * Handles API key, base URL, and other configuration options
 */
import { InjectionToken } from '@angular/core';
import { OpenCageConfig } from '../models/opencage-types';
import * as i0 from "@angular/core";
/**
 * Default configuration values
 */
export declare const DEFAULT_OPENCAGE_CONFIG: Partial<OpenCageConfig>;
/**
 * Injection token for OpenCage configuration
 */
export declare const OPENCAGE_CONFIG_TOKEN: InjectionToken<Partial<OpenCageConfig>>;
/**
 * OpenCage configuration service
 * Manages SDK configuration and provides access to settings
 */
export declare class OpenCageConfigService {
    private config;
    constructor(injectedConfig?: Partial<OpenCageConfig>);
    /**
     * Get current configuration
     */
    getConfig(): OpenCageConfig;
    /**
     * Update configuration
     */
    updateConfig(newConfig: Partial<OpenCageConfig>): void;
    /**
     * Get API key
     */
    getApiKey(): string;
    /**
     * Set API key
     */
    setApiKey(apiKey: string): void;
    /**
     * Get base URL
     */
    getBaseUrl(): string;
    /**
     * Get default language
     */
    getDefaultLanguage(): string;
    /**
     * Check if caching is enabled
     */
    isCachingEnabled(): boolean;
    /**
     * Get cache TTL
     */
    getCacheTtl(): number;
    /**
     * Check if rate limiting is enabled
     */
    isRateLimitEnabled(): boolean;
    /**
     * Get rate limit
     */
    getRateLimit(): number;
    /**
     * Get timeout value
     */
    getTimeout(): number;
    /**
     * Get retry attempts
     */
    getRetryAttempts(): number;
    /**
     * Get retry delay
     */
    getRetryDelay(): number;
    /**
     * Check if debug mode is enabled
     */
    isDebugEnabled(): boolean;
    /**
     * Validate configuration
     */
    validateConfig(): {
        valid: boolean;
        errors: string[];
    };
    /**
     * Create URL with query parameters
     */
    buildUrl(endpoint: string, params?: Record<string, any>): string;
    /**
     * Get HTTP headers
     */
    getHeaders(): Record<string, string>;
    /**
     * Create configuration for environment
     */
    static forEnvironment(environment: 'development' | 'production' | 'test'): Partial<OpenCageConfig>;
    /**
     * Merge configuration objects
     */
    private mergeConfigs;
    static ɵfac: i0.ɵɵFactoryDeclaration<OpenCageConfigService, [{ optional: true; }]>;
    static ɵprov: i0.ɵɵInjectableDeclaration<OpenCageConfigService>;
}
/**
 * Provider factory for OpenCage configuration
 */
export declare function provideOpenCageConfig(config: Partial<OpenCageConfig>): {
    provide: InjectionToken<Partial<OpenCageConfig>>;
    useValue: Partial<OpenCageConfig>;
};