/**
 * @fileoverview Base client for interacting with the DeepSource API
 * This module provides a base client class with core functionality.
 */
import { AxiosInstance } from 'axios';
import { GraphQLResponse } from '../types/graphql-responses.js';
import { DeepSourceProject } from '../models/projects.js';
import { PaginatedResponse, PaginationParams } from '../utils/pagination/types.js';
/**
 * Configuration options for the DeepSource client
 * @public
 */
export interface DeepSourceClientConfig {
    /** The base URL for the API */
    baseURL?: string;
    /** Request timeout in milliseconds */
    timeout?: number;
    /** Custom headers to include in requests */
    headers?: Record<string, string>;
}
/**
 * Base client for DeepSource API with core HTTP functionality
 * @class
 * @public
 */
export declare class BaseDeepSourceClient {
    /**
     * HTTP client for making API requests to DeepSource
     * @protected
     */
    protected client: AxiosInstance;
    /**
     * Logger instance for the client
     * @protected
     */
    protected logger: import("../utils/logging/logger.js").Logger;
    /**
     * Creates a new BaseDeepSourceClient instance
     * @param apiKey - The DeepSource API key for authentication
     * @param config - Optional configuration options
     * @throws {Error} When apiKey is not provided
     * @public
     */
    constructor(apiKey: string, config?: DeepSourceClientConfig);
    /**
     * Execute a GraphQL query with variables against the DeepSource API
     * @param query The GraphQL query to execute
     * @param variables The variables for the query
     * @returns The query response data
     * @throws {ClassifiedError} When the query fails
     * @protected
     */
    protected executeGraphQL<T>(query: string, variables?: Record<string, unknown>): Promise<GraphQLResponse<T>>;
    /**
     * Execute a GraphQL query with automatic retry logic
     * @param query The GraphQL query to execute
     * @param variables The variables for the query
     * @param endpoint The endpoint name for retry policy selection
     * @returns The query response data
     * @throws {ClassifiedError} When the query fails after all retries
     * @protected
     */
    protected executeGraphQLWithRetry<T>(query: string, variables?: Record<string, unknown>, endpoint?: string): Promise<GraphQLResponse<T>>;
    /**
     * Type guard to check if an error is an Axios error
     * @param error The error to check
     * @returns True if it's an Axios error
     * @private
     */
    private static isAxiosError;
    /**
     * Execute a GraphQL mutation against the DeepSource API
     * @param mutation The GraphQL mutation to execute
     * @param variables The variables for the mutation
     * @returns The mutation response data
     * @throws {ClassifiedError} When the mutation fails
     * @protected
     */
    protected executeGraphQLMutation<T>(mutation: string, variables?: Record<string, unknown>): Promise<T>;
    /**
     * Finds a project by its key using a simplified projects query
     * @param projectKey The project key to find
     * @returns The project if found, null otherwise
     * @protected
     */
    protected findProjectByKey(projectKey: string): Promise<DeepSourceProject | null>;
    /**
     * Normalizes pagination parameters to ensure they're valid
     * @param params The pagination parameters to normalize
     * @returns Normalized pagination parameters
     * @protected
     */
    protected static normalizePaginationParams(params: PaginationParams): PaginationParams;
    /**
     * Creates an empty paginated response
     * @returns An empty paginated response
     * @protected
     */
    protected static createEmptyPaginatedResponse<T>(): PaginatedResponse<T>;
    /**
     * Extracts error messages from GraphQL errors array
     * @param errors Array of GraphQL errors
     * @returns Combined error message string
     * @protected
     */
    protected static extractErrorMessages(errors: Array<{
        message: string;
    }>): string;
    /**
     * Fetches data with automatic pagination support
     * Handles multi-page fetching when max_pages is specified
     * @template T The type of items being fetched
     * @param fetcher Single page fetcher function
     * @param params Pagination parameters including potential max_pages
     * @returns Paginated response with all fetched items
     * @protected
     */
    protected fetchWithPagination<T>(fetcher: (params: PaginationParams) => Promise<PaginatedResponse<T>>, params: PaginationParams): Promise<PaginatedResponse<T>>;
}