/**
 * @fileoverview API utilities for interacting with AI services.
 *
 * This module provides utilities for interacting with AI services,
 * including API key management, request formatting, and response processing.
 */
/**
 * Check if an API key is available for a specific provider
 *
 * This function checks if an API key is available for the specified provider
 * by calling the getApiKeyForProvider function from the config module.
 *
 * @param provider Provider name (gemini, openrouter, anthropic, openai)
 * @returns True if an API key is available and non-empty, false otherwise
 * @example
 * hasApiKey('gemini') // Returns true if AI_CODE_REVIEW_GOOGLE_API_KEY is set
 * hasApiKey('anthropic') // Returns true if AI_CODE_REVIEW_ANTHROPIC_API_KEY is set
 */
export declare function hasApiKey(provider: string): boolean;
/**
 * Get the available API key type based on the model specified in environment variables
 *
 * This function determines which AI provider to use based on:
 * 1. The model adapter specified in the AI_CODE_REVIEW_MODEL environment variable
 * 2. The availability of API keys for different providers
 *
 * The function first checks if a specific adapter is specified in the model name
 * (e.g., 'gemini:gemini-1.5-pro' or 'anthropic:claude-3-opus'). If so, it checks
 * if the corresponding API key is available. If not, or if no adapter is specified,
 * it falls back to checking for any available API key in a specific order.
 *
 * @returns The type of API key available ('OpenRouter', 'Google', 'Anthropic', 'OpenAI', or null if none)
 * @example
 * // If AI_CODE_REVIEW_MODEL='gemini:gemini-1.5-pro' and Google API key is available
 * getApiKeyType() // Returns 'Google'
 *
 * // If no model is specified but Anthropic API key is available
 * getApiKeyType() // Returns 'Anthropic'
 */
export declare function getApiKeyType(): 'OpenRouter' | 'Google' | 'Anthropic' | 'OpenAI' | null;
/**
 * Get the API key type based on available environment variables (lowercase version)
 *
 * This is an alternative version of getApiKeyType that returns lowercase strings
 * and 'none' instead of null. This function is maintained for internal usage
 * within the api utilities module.
 *
 * @returns The type of API key available ('google', 'openrouter', 'anthropic', 'openai', or 'none')
 * @internal
 */
export declare function getApiKeyTypeLowerCase(): 'google' | 'openrouter' | 'anthropic' | 'openai' | 'none';
/**
 * Format an error message for API errors
 *
 * This function takes an error object and a provider name and returns a formatted
 * error message that is more user-friendly and provides context about the error.
 * It detects common error patterns like authentication issues, rate limits, and
 * server errors, and formats them appropriately.
 *
 * @param error Error object or any value that can be converted to a string
 * @param provider Provider name (e.g., 'Google', 'OpenRouter', 'Anthropic')
 * @returns Formatted error message with provider context
 * @example
 * // For an authentication error
 * formatApiError(new Error('401 Unauthorized'), 'Google')
 * // Returns 'Google API key is invalid or expired. Please check your API key.'
 *
 * // For a generic error
 * formatApiError(new Error('Something went wrong'), 'Anthropic')
 * // Returns 'Anthropic API error: Something went wrong'
 */
export declare function formatApiError(error: any, provider: string): string;
/**
 * Log API request details for debugging purposes
 *
 * This function logs the details of an API request, including the provider,
 * endpoint, and request parameters. It automatically redacts sensitive data
 * like API keys to prevent them from appearing in logs.
 *
 * The function only logs when debug logging is enabled, so it's safe to call
 * in production code without generating excessive log output.
 *
 * @param provider Provider name (e.g., 'Google', 'OpenRouter', 'Anthropic')
 * @param endpoint Endpoint being called (e.g., '/v1/chat/completions')
 * @param params Request parameters object containing the request data
 * @example
 * logApiRequest('OpenAI', '/v1/chat/completions', {
 *   model: 'gpt-4',
 *   messages: [{ role: 'user', content: 'Hello' }],
 *   apiKey: 'sk-1234' // This will be redacted in the logs
 * });
 */
export declare function logApiRequest(provider: string, endpoint: string, params: any): void;