/**
 * Base Virus Scan Provider
 * Abstract class providing common functionality for virus scan providers
 */
import type { VirusScanProvider, VirusScanResult, VirusScanProviderConfig } from '@plyaz/types/storage';
import type { createApiClient } from '@plyaz/api';
/**
 * Abstract base class for virus scan providers
 * Provides common functionality like validation, error handling, and statistics
 */
export declare abstract class BaseVirusScanProvider implements VirusScanProvider {
    abstract readonly providerName: string;
    protected readonly config: VirusScanProviderConfig;
    protected scansPerformed: number;
    protected threatsDetected: number;
    protected totalScanTime: number;
    protected apiClientGetter?: () => Awaited<ReturnType<typeof createApiClient>> | null;
    constructor(config?: VirusScanProviderConfig);
    /**
     * Set API client getter (called by plugin after provider creation)
     * Allows provider to access the plugin's API client
     */
    setApiClientGetter(getter: () => Awaited<ReturnType<typeof createApiClient>> | null): void;
    /**
     * Validate provider configuration
     * Override in subclasses for provider-specific validation
     */
    protected validateConfig(): void;
    /**
     * Get API client for making HTTP requests
     * Returns null if API client not configured or not set by plugin
     * Subclasses should call this to get the API client
     */
    protected getApiClient(): Awaited<ReturnType<typeof createApiClient>> | null;
    /**
     * Scan a file for viruses/malware
     * Template method that handles validation and calls provider-specific scan
     */
    scan(file: Buffer, filename: string): Promise<VirusScanResult>;
    /**
     * Provider-specific scan implementation
     * Must be implemented by subclasses
     */
    protected abstract scanFile(file: Buffer, filename: string): Promise<VirusScanResult>;
    /**
     * Check if provider is available and healthy
     * Override in subclasses for provider-specific health checks
     */
    isAvailable(): Promise<boolean>;
    /**
     * Get provider statistics
     */
    getStatistics(): Promise<{
        scansPerformed: number;
        threatsDetected: number;
        averageScanTime: number;
    }>;
    /**
     * Reset statistics
     */
    resetStatistics(): void;
}