import { XaiChatRequestBody } from '../../chat';
export type FetchFn = typeof fetch;
export type FetchMethod = 'GET' | 'POST' | 'PUT' | 'PATCH' | 'DELETE' | 'HEAD' | 'OPTIONS' | 'CONNECT';
export type SseEventType = 'message' | 'error' | 'close' | 'cancel' | string;
export type SseCallbackFn<T = any> = (data?: T) => void;
export type XaiBearerHeaders = {
    Authorization: string;
    'X-Loto-Key'?: string;
    'X-Loto-Reqid'?: string;
    [k: string]: any;
};
/**
 * @public
 *  SSE contructor options
 * @property eventDataParsed if true onMessage will return
 *  messageEvent.data as Object,otherwise
 * @property checkAuth is check Authorization in header
 * @property apiBasePrefix :/api/v1
 * @property token priority over bearerHeaders,use bearer potocol
 * @property bearerHeaders contains  Authorization & clientid
 * @property onmessage,onclose,oncancel,onerror callback function
 */
export type XaiStreamableOptions = {
    checkAuth?: boolean;
    apiBasePrefix?: string;
    debug?: boolean;
    eventDataParsed?: boolean;
    method?: FetchMethod | string;
    token?: string;
    bearerHeaders?: XaiBearerHeaders;
    fetch?: FetchFn;
    onmessage: SseCallbackFn;
    onclose?: SseCallbackFn;
    oncancel?: SseCallbackFn;
    onerror?: SseCallbackFn;
};
export interface XaiStreamableRequestData extends XaiChatRequestBody {
    msgid?: string;
    reqid?: string;
    controller?: AbortController;
    headers?: Record<string, string>;
}
export interface IXaiStreamCache {
    chatid?: string;
    reqid: string;
    msgid: string;
    created: number;
    provider?: string;
    model?: string;
    question?: string;
    [k: string]: any;
}
export interface XaiStreamCompleteData extends IXaiStreamCache {
    costTime?: string;
    result: string;
}
/**
 * @public
 * @param prepareRequestData
 *  Before the SSE launch request,prepare request body or header parameters
 *  like reqid,msgid,pick user question and return by callback
 */
export type StreamablePrepareCallback = (prepareRequestData: IXaiStreamCache) => void;