/**
 * Google (Gemini) provider implementation
 *
 * HTTP Agent Pooling Status: ❌ NOT IMPLEMENTED
 * Reason: Google Generative AI SDK (@google/generative-ai ^0.21.0) does not support HTTP agent configuration
 * Impact: Each request creates new HTTP connections (performance optimisation opportunity)
 * Recommendation: Monitor SDK updates or consider REST API with custom HTTP client
 *
 * Self-registers with the LLM Provider Registry using dependency inversion pattern
 */
import type { LLMCompletionOptions, LLMCompletionResult } from '../../types/llm.types.js';
import { BaseLLMProvider } from '../provider.interface.js';
export declare class GoogleProvider extends BaseLLMProvider {
    name: import("../../config/providers.config.js").ProviderName;
    private client;
    complete(options: LLMCompletionOptions): Promise<LLMCompletionResult>;
    getAlternativeModels(currentModel?: string): string[];
    isConfigured(): boolean;
    streamComplete(options: LLMCompletionOptions, onChunk: (chunk: string) => void): Promise<LLMCompletionResult>;
    validateModel(modelName: string): Promise<boolean>;
    /**
     * Create generation config from completion options
     */
    private createGenerationConfig;
    private formatMessages;
    private getClient;
    /**
     * Extract usage metrics from Google response, including cached content tokens.
     */
    private extractUsage;
    /**
     * Map Google API response to LLMCompletionResult
     */
    private mapResponseToResult;
    /**
     * Process streaming chunks and accumulate content
     */
    private processStream;
    /**
     * Returns false — Google Vertex AI batch requires @google-cloud/aiplatform.
     * Install the package and configure vertex_project to enable batch support.
     */
    supportsBatch(): false;
    /**
     * Handle Google API errors with proper error messages
     * @param error - The error to handle
     * @param context - The context where the error occurred (e.g., 'API', 'streaming')
     */
    private handleGoogleError;
}
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