import { ConfigRepository } from '../../infrastructure/repositories/config.repository';
/**
 * Application Configuration
 */
export interface AppConfig {
    supabase: {
        url: string;
        serviceRoleKey: string;
    };
    queue: {
        name: string;
        visibilityTimeoutSeconds: number;
        pollIntervalMs: number;
    };
    download: {
        timeoutMs: number;
        maxRetries: number;
        defaultPath: string;
        fallbackPath?: string;
    };
    platform: {
        name: string;
        isWindows: boolean;
        isMac: boolean;
        isLinux: boolean;
        separator: string;
    };
    instance: {
        id: string;
        name: string;
    };
}
/**
 * Configuration Manager
 * Loads and validates application configuration
 */
export declare class ConfigManager {
    private configRepository;
    private config;
    constructor(configRepository: ConfigRepository);
    /**
     * Loads configuration from database with fallback to environment variables
     * @param instanceId - Optional instance ID (for testing or pre-registered instances)
     * @throws Error if required variables are missing
     */
    load(instanceId?: string): Promise<AppConfig>;
    /**
     * Gets the current configuration
     * @throws Error if configuration not loaded
     */
    get(): AppConfig;
    /**
     * Validates that all required environment variables are present
     * @throws Error if any required variable is missing
     */
    private validateRequiredEnvVars;
    /**
     * Get configuration value with priority: DB > ENV > Default
     */
    private getConfigValue;
}
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