import type { AuthProviderConfig, CustomAuthConfig, AuthUser, AuthSession, TokenValidationResult, AuthRequestContext, AuthHealthCheck } from "../../types/index.js";
import { BaseAuthProvider } from "./BaseAuthProvider.js";
/**
 * Custom Authentication Provider
 *
 * Allows users to provide their own authentication logic through callback functions.
 * Useful for integrating with custom auth systems or implementing unique auth flows.
 *
 * Features:
 * - Custom token validation via callback
 * - Custom user fetching (optional)
 * - Custom session creation (optional, delegates to base when not provided)
 * - Session management (inherited from BaseAuthProvider)
 *
 * @example
 * ```typescript
 * const custom = new CustomAuthProvider({
 *   type: "custom",
 *   validateToken: async (token, context) => {
 *     // Your custom token validation logic
 *     const decoded = await myAuthService.verify(token);
 *     return {
 *       valid: !!decoded,
 *       user: decoded ? {
 *         id: decoded.sub,
 *         email: decoded.email,
 *         roles: decoded.roles || [],
 *         permissions: decoded.permissions || [],
 *       } : undefined,
 *     };
 *   },
 *   getUser: async (userId) => {
 *     // Your custom user fetching logic
 *     return myUserService.getById(userId);
 *   },
 * });
 *
 * const result = await custom.authenticateToken(token);
 * ```
 */
export declare class CustomAuthProvider extends BaseAuthProvider {
    readonly type: "custom";
    private validateTokenFn;
    private getUserFn?;
    private createSessionFn?;
    constructor(config: AuthProviderConfig & CustomAuthConfig);
    /**
     * Validate token using custom function
     */
    authenticateToken(token: string, context?: AuthRequestContext): Promise<TokenValidationResult>;
    /**
     * Create a new session.
     * Uses custom function if provided, otherwise delegates to BaseAuthProvider.
     */
    createSession(user: AuthUser, context?: AuthRequestContext): Promise<AuthSession>;
    /**
     * Get user by ID using custom function
     */
    getUser(userId: string): Promise<AuthUser | null>;
    /**
     * Health check - always healthy for custom provider
     */
    healthCheck(): Promise<AuthHealthCheck>;
}