import { OAuthTokenStorage } from '../oauth/store';
/**
 * Generic OAuth-bearer client factory — dùng cho các provider không có
 * fingerprint phức tạp (Qwen / Kimi / iFlow / xAI). Caller cung cấp:
 *  - defaultBase: URL gốc
 *  - userAgent
 *  - refreshFn: async fn nhận token cũ → token mới
 *  - extraHeaders (optional): static headers cần thêm
 *
 * Trả về 2 hàm: call + stream + getValidToken.
 */
export interface GenericClientOpts {
    providerKey: string;
    defaultBase: string;
    userAgent: string;
    refresh: (current: OAuthTokenStorage) => Promise<OAuthTokenStorage>;
    /** Static headers cần thêm trên mỗi request. */
    extraHeaders?: Record<string, string>;
    /** Refresh grace before expiry (ms). */
    refreshGraceMs?: number;
}
export interface ProviderRequestInput {
    path: string;
    method?: 'GET' | 'POST' | 'PUT' | 'PATCH' | 'DELETE';
    body?: unknown;
    headers?: Record<string, string>;
    account?: string;
}
export interface ProviderResponse {
    status: number;
    headers: Record<string, string>;
    body: unknown;
    errorType?: string;
    account: string;
}
export declare function createGenericClient(opts: GenericClientOpts): {
    call: (input: ProviderRequestInput) => Promise<ProviderResponse>;
    stream: (input: ProviderRequestInput) => AsyncGenerator<{
        chunk: string;
    }, {
        status: number;
        account: string;
    }, void>;
    getValidToken: (account?: string) => Promise<OAuthTokenStorage>;
};