import type { Message, Tool, ToolDefinition, Attachment, ContentPart, ProviderOptions, ProviderResponse, ProviderChunk, ServiceName, Model } from '../types';
/**
 * Abstract base class for all LLM providers
 * Providers must implement the abstract methods to handle provider-specific logic
 */
export declare abstract class BaseProvider {
    /**
     * The name of this provider service
     */
    abstract readonly name: ServiceName;
    /**
     * Whether this provider supports thinking/reasoning mode
     */
    abstract readonly supportsThinking: boolean;
    /**
     * Whether this provider supports tool/function calling
     */
    abstract readonly supportsTools: boolean;
    /**
     * Whether this provider supports vision (image) inputs
     */
    abstract readonly supportsVision: boolean;
    /**
     * Whether this provider supports document (PDF) inputs
     */
    abstract readonly supportsDocuments: boolean;
    /**
     * Send a non-streaming request to the provider
     * @param messages - The conversation messages
     * @param options - Provider-specific options
     * @returns The provider response
     */
    abstract sendRequest(messages: Message[], options: ProviderOptions): Promise<ProviderResponse>;
    /**
     * Send a streaming request to the provider
     * @param messages - The conversation messages
     * @param options - Provider-specific options
     * @returns An async iterable of response chunks
     */
    abstract sendStreamingRequest(messages: Message[], options: ProviderOptions): AsyncIterable<ProviderChunk>;
    /**
     * Fetch available models from the provider
     * @param apiKey - Optional API key for authentication
     * @returns List of available models
     */
    abstract fetchModels(apiKey?: string): Promise<Model[]>;
    /**
     * Verify the connection to the provider
     * @param apiKey - Optional API key for authentication
     * @returns True if connection is successful
     */
    abstract verifyConnection(apiKey?: string): Promise<boolean>;
    /**
     * Format messages for the provider's API format
     * Override in subclasses for provider-specific formatting
     * @param messages - The conversation messages
     * @returns Formatted messages for the provider
     */
    protected formatMessages(messages: Message[]): unknown;
    /**
     * Format tools for the provider's API format
     * Override in subclasses for provider-specific formatting
     * @param tools - The tool definitions
     * @returns Formatted tools for the provider
     */
    protected formatTools(tools: Tool[]): ToolDefinition[];
    /**
     * Format attachments for the provider's API format
     * Override in subclasses for provider-specific formatting
     * @param attachments - The attachments
     * @returns Formatted content parts for the provider
     */
    protected formatAttachments(attachments: Attachment[]): ContentPart[];
    /**
     * Parse the provider's response into a standard format
     * Override in subclasses for provider-specific parsing
     * @param response - The raw provider response
     * @returns Parsed provider response
     */
    protected parseResponse(response: unknown): ProviderResponse;
    /**
     * Parse a streaming chunk into a standard format
     * Override in subclasses for provider-specific parsing
     * @param chunk - The raw provider chunk
     * @returns Parsed provider chunk
     */
    protected parseChunk(chunk: unknown): ProviderChunk;
    /**
     * Get the default base URL for this provider
     * Override in subclasses to provide provider-specific URLs
     */
    protected getDefaultBaseUrl(): string;
    /**
     * Get the environment variable name for the API key
     * Override in subclasses to provide provider-specific env var names
     */
    protected getApiKeyEnvVar(): string;
}
//# sourceMappingURL=base-provider.d.ts.map