import type { ServiceName } from '../types';
import { BaseProvider } from './base-provider';
/**
 * Registry for managing LLM providers
 * Handles registration, lookup, and listing of providers
 */
export declare class ProviderRegistry {
    private providers;
    private static instance;
    /**
     * Get the singleton instance of the registry
     */
    static getInstance(): ProviderRegistry;
    /**
     * Reset the singleton instance (useful for testing)
     */
    static resetInstance(): void;
    /**
     * Register a provider with the registry
     * @param name - The service name to register under
     * @param provider - The provider instance
     * @throws ValidationError if name is empty
     */
    register(name: string, provider: BaseProvider): void;
    /**
     * Get a provider by service name
     * @param name - The service name to look up
     * @returns The provider instance
     * @throws ValidationError if provider is not found
     */
    get(name: ServiceName): BaseProvider;
    /**
     * Check if a provider is registered
     * @param name - The service name to check
     * @returns True if the provider is registered
     */
    has(name: ServiceName): boolean;
    /**
     * List all registered provider names
     * @returns Array of registered service names
     */
    list(): ServiceName[];
    /**
     * Unregister a provider
     * @param name - The service name to unregister
     * @returns True if the provider was unregistered
     */
    unregister(name: string): boolean;
    /**
     * Clear all registered providers
     */
    clear(): void;
}
/**
 * Get the global provider registry instance
 */
export declare function getProviderRegistry(): ProviderRegistry;
/**
 * Register a provider globally
 * @param name - The service name to register under
 * @param provider - The provider instance
 */
export declare function registerProvider(name: string, provider: BaseProvider): void;
/**
 * Get a provider from the global registry
 * @param name - The service name to look up
 * @returns The provider instance
 */
export declare function getProvider(name: ServiceName): BaseProvider;
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