import { InternalAxiosRequestConfig, AxiosInstance } from 'axios';

declare module "axios" {
    interface AxiosRequestConfig {
        skipAuthRefresh?: boolean;
    }
}
interface AuthTokens {
    accessToken: string;
    refreshToken?: string;
}
/**
 * Configuration options for the Auth Interceptor.
 */
interface AuthInterceptorConfig {
    /** * The function to call when the token expires.
     * Should return the new access token (and refresh token if available).
     */
    requestRefresh: (refreshToken?: string) => Promise<AuthTokens>;
    /**
     * Function to get the current refresh token from storage.
     */
    getRefreshToken?: () => string | null | undefined;
    /** Callback chạy khi refresh thành công */
    onSuccess: (tokens: AuthTokens) => void;
    /** Callback chạy khi refresh thất bại  */
    onFailure: (error: any) => void;
    /**  Tự custom cách gắn token vào header. Mặc định là 'Authorization: Bearer ...' */
    attachTokenToRequest?: (request: InternalAxiosRequestConfig, token: string) => void;
    /**
     * Handler chạy trước mọi request.
     * Dùng để tự động gắn Access Token vào header từ localStorage/Store.
     */
    headerTokenHandler?: (request: InternalAxiosRequestConfig) => void | Promise<void>;
    refreshTimeout?: number;
    /** * error code refresh token.
     * @default [401]
     */
    statusCodes?: number[];
    /** * log debug interceptor.
     * @default false
     */
    debug?: boolean;
    /**
     * [OPTIONAL] Check if the token in storage is valid.
     * Used for Cross-Tab Synchronization.
     *
     * If this returns a string (the token), we skip the refresh and use this token.
     * If this returns null/false, we proceed with the refresh.
     */
    checkTokenIsValid?: () => Promise<string | null | false> | string | null | false;
}
/**
 * Applies the authentication interceptor to an Axios instance.
 * * @param axiosInstance - The Axios instance to intercept.
 * @param config - Configuration for the interceptor.
 * * @example
 * ```ts
 * applyAuthTokenInterceptor(axios, {
 * requestRefresh: myRefreshFunction,
 * onSuccess: (tokens) => saveTokens(tokens),
 * onFailure: () => logout(),
 * });
 * ```
 */
declare const applyAuthTokenInterceptor: (axiosInstance: AxiosInstance, config: AuthInterceptorConfig) => void;

export { type AuthInterceptorConfig, type AuthTokens, applyAuthTokenInterceptor };