import type { ServerConfig, ChatGPTConfig, HuggingFaceConfig } from '../types/index.js';
declare class ConfigManager {
    private config;
    private configPath;
    constructor();
    /**
     * Load configuration from file or environment variables
     */
    loadConfig(): Promise<ServerConfig>;
    /**
     * Save current configuration to file
     */
    saveConfig(config: ServerConfig): Promise<void>;
    /**
     * Get configuration from environment variables
     */
    private getConfigFromEnv;
    /**
     * Deep merge configurations
     */
    private mergeConfigs;
    /**
     * Deep merge two objects
     */
    private deepMerge;
    /**
     * Remove undefined values from object
     */
    private removeUndefined;
    /**
     * Ensure required directories exist
     */
    private ensureDirectories;
    /**
     * Get current configuration
     */
    getConfig(): ServerConfig | null;
    /**
     * Check if a provider is enabled and configured
     */
    isProviderEnabled(provider: 'chatgpt' | 'huggingface'): boolean;
    /**
     * Get enabled providers
     */
    getEnabledProviders(): string[];
    /**
     * Update provider configuration
     */
    updateProviderConfig(provider: 'chatgpt' | 'huggingface', config: Partial<ChatGPTConfig | HuggingFaceConfig>): Promise<void>;
    /**
     * Generate example configuration file
     */
    generateExampleConfig(): Promise<void>;
}
export declare const configManager: ConfigManager;
export default configManager;
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