import { ServiceProvider, IAuthProvider, IFunctionProvider, IStorageProvider, IDatabaseProvider } from '@progressive-development/pd-provider-interfaces';
/**
 * Central service container for dependency injection
 *
 * Usage:
 * ```typescript
 * // In app initialization (e.g., main.ts)
 * import { services } from "pd-helper-app";
 * import { createFirebaseProvider } from "pd-provider-firebase";
 *
 * services.initialize(createFirebaseProvider(firebaseConfig));
 *
 * // In components/services
 * import { services } from "pd-helper-app";
 *
 * const user = services.auth.getCurrentUser();
 * ```
 */
export declare class ServiceRegistry {
    private provider;
    /**
     * Initialize the service registry with a provider
     * @param provider The service provider to use
     * @throws Error if already initialized
     */
    initialize(provider: ServiceProvider): void;
    /**
     * Check if the registry has been initialized
     */
    get isInitialized(): boolean;
    /**
     * Ensure the registry is initialized before accessing providers
     * @throws Error if not initialized
     */
    private ensureInitialized;
    /**
     * Get the auth provider
     */
    get auth(): IAuthProvider;
    /**
     * Get the functions provider
     */
    get functions(): IFunctionProvider;
    /**
     * Get the storage provider
     */
    get storage(): IStorageProvider;
    /**
     * Get the database provider (optional)
     * @returns Database provider or undefined if not configured
     */
    get database(): IDatabaseProvider | undefined;
    /**
     * Get a NAMED database provider.
     *
     * `database` returns the primary one — the database an app works with by
     * default. Apps that read from several (say, their own plus a shared one)
     * address the others by name.
     *
     * Throws rather than returning undefined: A missing name is a configuration
     * mistake, and it should surface where it happens, not as an empty list
     * three layers further on.
     *
     * @param name Logical name from the provider configuration
     */
    databaseNamed(name: string): IDatabaseProvider;
    /**
     * Reset the registry (primarily for testing)
     *
     * Warning: This should only be used in tests.
     * In production, providers should be initialized once at app startup.
     */
    reset(): void;
}
/**
 * Global service registry instance
 *
 * This is the main entry point for accessing services throughout the application.
 */
export declare const services: ServiceRegistry;
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