/**
 * Diagnostic utilities for testing Qwen OAuth endpoints
 */
export interface DiagnosticResult {
    success: boolean;
    endpoint: string;
    status?: number;
    statusText?: string;
    error?: string;
    data?: any;
    responseTime?: number;
}
/**
 * Test if Qwen OAuth device code endpoint is accessible
 */
export declare function testDeviceCodeEndpoint(): Promise<DiagnosticResult>;
/**
 * Test if Qwen API endpoint is accessible
 * Tests the /chat/completions endpoint (OpenAI-compatible)
 */
export declare function testAPIEndpoint(baseURL: string, token?: string): Promise<DiagnosticResult>;
/**
 * Test if the base OAuth URL is accessible
 */
export declare function testBaseURL(): Promise<DiagnosticResult>;
/**
 * Run all diagnostic tests
 */
export declare function runDiagnostics(token?: string): Promise<{
    baseURL: DiagnosticResult;
    deviceCode: DiagnosticResult;
    apis: Record<string, DiagnosticResult>;
}>;
/**
 * Run the OAuth device flow to get a token
 */
export declare function runOAuthFlow(): Promise<{
    access_token: string;
    refresh_token: string;
    expires_in: number;
} | null>;
/**
 * Refresh an access token
 */
export declare function refreshToken(refreshToken: string): Promise<{
    access_token: string;
    expires_in: number;
} | null>;
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