import 'reflect-metadata';
/**
 * Configuration Module Options
 */
export interface ConfigModuleOptions {
    /**
     * Path to .env file (relative to project root)
     */
    envFilePath?: string;
    /**
     * Whether to ignore .env file if it doesn't exist
     */
    ignoreEnvFile?: boolean;
    /**
     * Whether to validate environment variables
     */
    validate?: (config: Record<string, any>) => boolean;
    /**
     * Default values for environment variables
     */
    defaults?: Record<string, string>;
}
/**
 * Configuration Service
 * Provides type-safe access to environment variables
 */
export declare class ConfigService {
    private config;
    constructor(options?: ConfigModuleOptions);
    /**
     * Get a configuration value
     */
    get<T = string>(key: string): T | undefined;
    get<T = string>(key: string, defaultValue: T): T;
    /**
     * Get a required configuration value
     * Throws if not found
     */
    getOrThrow<T = string>(key: string): T;
    /**
     * Get all configuration
     */
    getAll(): Record<string, string>;
}
/**
 * Dynamic module result type
 */
export interface DynamicModuleResult {
    providers: Array<{
        provide: any;
        useValue: unknown;
    }>;
    exports: any[];
}
/**
 * Configuration Module
 * NestJS-style configuration management
 */
export declare class ConfigModule {
    static forRoot(options?: ConfigModuleOptions): DynamicModuleResult;
}
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