import type { ImageProvider, ImageGenerationRequest, ImageGenerationResult, ImageDescriptionResult, ImageTaggingResult, ProviderError } from '../types/index.js';
/**
 * Abstract base class for image providers
 */
export declare abstract class BaseImageProvider implements ImageProvider {
    abstract name: string;
    protected timeout: number;
    protected retryAttempts: number;
    protected retryDelay: number;
    constructor(timeout?: number);
    /**
     * Generate image using the provider
     */
    abstract generateImage(request: ImageGenerationRequest): Promise<ImageGenerationResult>;
    /**
     * Describe image content (optional)
     */
    describeImage?(imageUrl: string): Promise<ImageDescriptionResult>;
    /**
     * Tag image content (optional)
     */
    tagImage?(imageUrl: string): Promise<ImageTaggingResult>;
    /**
     * Check if provider is available and configured
     */
    abstract isAvailable(): Promise<boolean>;
    /**
     * Validate image generation request
     */
    protected validateRequest(request: ImageGenerationRequest): void;
    /**
     * Create provider-specific error
     */
    protected createError(code: string, message: string, details?: any): ProviderError;
    /**
     * Execute with retry logic
     */
    protected executeWithRetry<T>(operation: () => Promise<T>, operationName: string): Promise<T>;
    /**
     * Check if error is a client error (shouldn't retry)
     */
    protected isClientError(error: any): boolean;
    /**
     * Create timeout promise
     */
    private createTimeoutPromise;
    /**
     * Delay utility
     */
    private delay;
    /**
     * Sanitize prompt (remove potentially harmful content)
     */
    protected sanitizePrompt(prompt: string): string;
    /**
     * Get supported formats for this provider
     */
    getSupportedFormats(): string[];
    /**
     * Get supported dimensions for this provider
     */
    getSupportedDimensions(): {
        width: number;
        height: number;
    }[];
    /**
     * Get maximum image count supported
     */
    getMaxImageCount(): number;
    /**
     * Check if provider supports feature
     */
    supportsFeature(feature: 'generation' | 'description' | 'tagging' | 'transparency' | 'logo'): boolean;
    /**
     * Get provider information
     */
    getInfo(): {
        name: string;
        supportedFormats: string[];
        supportedDimensions: {
            width: number;
            height: number;
        }[];
        maxImageCount: number;
        features: string[];
    };
}
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