import { ILLMProvider, LLMRequestPayload, LLMResponsePayload, ProviderConfig, ILogger } from '../types';
import { AxiosInstance, AxiosRequestConfig } from 'axios';
/**
 * Base provider with connection pooling and standardized error handling
 */
export declare abstract class BaseProvider implements ILLMProvider {
    protected readonly config: ProviderConfig;
    protected client: AxiosInstance;
    abstract readonly id: string;
    protected logger?: ILogger;
    constructor(config: ProviderConfig, logger?: ILogger);
    protected setAuthHeader(apiKey: string): void;
    abstract generateChat(payload: LLMRequestPayload, config?: ProviderConfig): Promise<LLMResponsePayload>;
    abstract generateText(payload: LLMRequestPayload, config?: ProviderConfig): Promise<LLMResponsePayload>;
    /**
     * Optional health check method
     */
    healthCheck(): Promise<boolean>;
    /**
     * Prepare request payload (normalize stop sequences, remove undefined values)
     */
    protected prepareRequest(payload: LLMRequestPayload): LLMRequestPayload;
    /**
     * Make a POST request with standardized error handling
     */
    protected post<T>(url: string, data: unknown, config?: AxiosRequestConfig): Promise<T>;
    /**
     * Convert axios errors to SDK error types
     */
    protected handleError(error: unknown): Error;
    /**
     * Get full URL for an endpoint
     */
    protected getFullUrl(endpoint: string): string;
    /**
     * Get headers for a request
     */
    protected getHeaders(config?: ProviderConfig): Record<string, string>;
    /**
     * Make a streaming POST request using fetch (for SSE support)
     * Returns the raw Response for stream processing
     */
    protected postStream(endpoint: string, data: unknown, config?: ProviderConfig, signal?: AbortSignal): Promise<Response>;
}
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