/**
 * ABAC Policy Loader Utilities
 *
 * Optional helper functions for loading and saving policies from common sources.
 * These are convenience utilities - users can load/save policies however they want.
 */
import { PolicyValidationResult } from './policyValidator';
import { ABACPolicy } from './types';
/**
 * Export a single policy to JSON string
 *
 * @param policy - The policy to export
 * @param pretty - Whether to format the JSON with indentation (default: true)
 * @returns JSON string representation of the policy
 */
export declare function exportPolicyToJSON(policy: ABACPolicy, pretty?: boolean): string;
/**
 * Export multiple policies to JSON string
 *
 * @param policies - The policies to export
 * @param pretty - Whether to format the JSON with indentation (default: true)
 * @returns JSON string representation of the policies array
 */
export declare function exportPoliciesToJSON(policies: ABACPolicy[], pretty?: boolean): string;
/**
 * Save a single policy to a JSON file
 *
 * @param policy - The policy to save
 * @param filePath - Path to the file where the policy should be saved
 * @param pretty - Whether to format the JSON with indentation (default: true)
 */
export declare function savePolicyToFile(policy: ABACPolicy, filePath: string, pretty?: boolean): Promise<void>;
/**
 * Save multiple policies to a JSON file
 *
 * @param policies - The policies to save
 * @param filePath - Path to the file where the policies should be saved
 * @param pretty - Whether to format the JSON with indentation (default: true)
 */
export declare function savePoliciesToFile(policies: ABACPolicy[], filePath: string, pretty?: boolean): Promise<void>;
/**
 * Save and validate a single policy to a JSON file
 *
 * @param policy - The policy to save
 * @param filePath - Path to the file where the policy should be saved
 * @param pretty - Whether to format the JSON with indentation (default: true)
 * @throws ValidationError if the policy is invalid
 */
export declare function saveAndValidatePolicyToFile(policy: ABACPolicy, filePath: string, pretty?: boolean): Promise<PolicyValidationResult>;
/**
 * Save and validate multiple policies to a JSON file
 *
 * @param policies - The policies to save
 * @param filePath - Path to the file where the policies should be saved
 * @param pretty - Whether to format the JSON with indentation (default: true)
 * @throws ValidationError if any policy is invalid
 */
export declare function saveAndValidatePoliciesToFile(policies: ABACPolicy[], filePath: string, pretty?: boolean): Promise<PolicyValidationResult[]>;
/**
 * Load policies from JSON file
 */
export declare function loadPoliciesFromFile(filePath: string): Promise<ABACPolicy[]>;
/**
 * Load and validate policies from JSON file
 */
export declare function loadAndValidatePoliciesFromFile(filePath: string): Promise<{
    policies: ABACPolicy[];
    validationResults: PolicyValidationResult[];
}>;
/**
 * Load policies from JSON string
 */
export declare function loadPoliciesFromJSON(json: string): ABACPolicy[];
/**
 * Helper adapter for Prisma
 *
 * @example
 * ```typescript
 * const policies = await prismaAdapter(prisma.abacPolicy.findMany({
 *   where: { active: true }
 * }));
 * ```
 */
export declare function prismaAdapter<T>(query: Promise<T[]>, mapper?: (row: T) => ABACPolicy): Promise<ABACPolicy[]>;
/**
 * Helper for caching policies
 */
export declare class PolicyCache {
    private policies;
    private lastLoaded;
    private ttl;
    constructor(ttlSeconds?: number);
    /**
     * Get cached policies or load fresh ones
     */
    get(loader: () => Promise<ABACPolicy[]>): Promise<ABACPolicy[]>;
    /**
     * Invalidate cache
     */
    invalidate(): void;
    /**
     * Manually set policies
     */
    set(policies: ABACPolicy[]): void;
}
/**
 * Filter policies by target criteria
 * Useful for optimizing policy evaluation
 */
export declare function filterPoliciesByTarget(policies: ABACPolicy[], criteria: {
    resourceType?: string;
    actionId?: string;
    subjectAttributes?: Record<string, unknown>;
}): ABACPolicy[];
/**
 * Group policies by effect for optimization
 */
export declare function groupPoliciesByEffect(policies: ABACPolicy[]): {
    permit: ABACPolicy[];
    deny: ABACPolicy[];
};
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