import { GoogleGenAI } from "@google/genai";
import { BaseImageGenerator, ImageGenerationParams, ImageGenerationResult, ImageEditParams, ImageVariationParams, ImageModelInfo } from "@memberjunction/ai";
/**
 * Google Gemini 3 Pro Image (Nano Banana Pro) implementation of the BaseImageGenerator class.
 * Supports Google's most advanced image generation model with 2K/4K resolution support.
 *
 * Model: gemini-3-pro-image-preview (November 2025)
 * - Native multimodal image generation
 * - High resolution output (up to 4K)
 * - Advanced style control and prompt understanding
 */
export declare class GeminiImageGenerator extends BaseImageGenerator {
    protected _gemini: GoogleGenAI | null;
    private _geminiPromise;
    constructor(apiKey: string);
    /**
     * Factory method to create the GoogleGenAI client instance.
     * Subclasses can override this to provide custom configuration.
     */
    protected createClient(): Promise<GoogleGenAI>;
    /**
     * Ensure the Gemini client is initialized before use.
     */
    private ensureGeminiClient;
    /**
     * Generate image(s) from a text prompt using Gemini 3 Pro Image (Nano Banana Pro).
     */
    GenerateImage(params: ImageGenerationParams): Promise<ImageGenerationResult>;
    /**
     * Edit an existing image using Gemini's multimodal capabilities.
     * Uses image-to-image generation with the original image as context.
     */
    EditImage(params: ImageEditParams): Promise<ImageGenerationResult>;
    /**
     * Create variations of an existing image.
     * Uses the original image as context with a variation prompt.
     */
    CreateVariation(params: ImageVariationParams): Promise<ImageGenerationResult>;
    /**
     * Get available Gemini image generation models.
     */
    GetModels(): Promise<ImageModelInfo[]>;
    /**
     * Get supported methods for this provider.
     */
    GetSupportedMethods(): Promise<string[]>;
    /**
     * Build generation config for Gemini API.
     */
    private buildGenerationConfig;
    /**
     * Extract image data from Gemini response.
     */
    private extractImageFromResponse;
    /**
     * Convert MIME type to image format.
     */
    private getMimeTypeFormat;
    /**
     * Handle errors and create error result.
     */
    private handleError;
}
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