/**
 * Gemini API Client Module
 *
 * Handles communication with the Google Gemini API.
 * Formats requests according to Gemini API specification and parses responses.
 */
import type { Logger, Base64Data, LLMResponse, GeminiGenerationConfig } from '../../llm_api/types.js';
/**
 * Call the Gemini API with the given prompt and optional image data
 * @param api_url - The Gemini API endpoint URL
 * @param api_key - The API key for authentication
 * @param prompt_text - The text prompt to send
 * @param b64_data - Optional array of base64 encoded images
 * @param logger - Logger instance
 * @param generation_config - Optional generation configuration parameters
 * @returns LLM response with generated text or error
 */
export declare function call_gemini_api(api_url: string, api_key: string, prompt_text: string, b64_data: Base64Data[] | undefined, logger: Logger, generation_config?: GeminiGenerationConfig): Promise<LLMResponse>;
/**
 * Get the default Gemini API URL
 * @param model - The model name (default: gemini-2.5-flash)
 * @returns The API URL
 */
export declare function get_gemini_api_url(model?: string): string;
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