import { Context } from '@koex/core';
import fetch from 'node-fetch';
import * as qs from '@zcorky/query-string';
import { Strategy, IVerify } from '@koex/passport';
export interface IOauthStrategyOptions {
    /**
     * Client ID
     */
    client_id: string;
    /**
     * Client ID
     */
    client_secret: string;
    /**
     * Redirect URI (callback url)
     */
    redirect_uri: string;
    /**
     * Scope / Permission
     */
    scope?: string;
    /**
     * State / Security
     */
    state?: string;
    /**
     * Response Type
     *  default: code
     */
    response_type?: string;
    /**
     * Grant Type
     *  default: authorization_code
     */
    grant_type?: string;
    /**
     * Authorize Url
     */
    authorize_url: string;
    /**
     * Token Url
     */
    token_url: string;
    /**
     * User Info Url
     */
    user_profile_url: string;
}
export interface IGetAuthorizeUrlData {
    /**
     * Client ID
     */
    client_id: string;
    /**
     * Redirect URI (callback url)
     */
    redirect_uri: string;
    /**
     * Response Type
     *  default: code
     */
    response_type?: string;
    /**
     * Scope / Permission
     */
    scope?: string;
    /**
     * State / Security
     */
    state?: string;
}
export interface IGetAccessTokenData {
    /**
     * Client ID
     */
    client_id: string;
    /**
     * Client ID
     */
    client_secret: string;
    /**
     * Redirect URI (callback url)
     */
    redirect_uri: string;
    /**
     * Grant Type
     *  default: authorization_code
     */
    grant_type?: string;
    /**
     * Scope / Permission
     */
    scope?: string;
    /**
     * Authorization Code
     */
    code: string;
}
/**
 * Access Token
 */
export declare type Token = any;
/**
 * Oauth Passport Strategy
 *  which defined the authenticate(@S1) and callback flow(@S2),
 *  what you need do is to realize the following three methods,
 *  which will used in authenticate and callback flow.
 *    @Method getAuthorizeUrl(url, data): URL (@S1)
 *    @Method getAccessToken(url, data): Token (@S2)
 *    @Method getAccessUser(url, data): User (@S3)
 */
export declare abstract class OauthStrategy<IToken = any, Profile = any> extends Strategy<IToken, Profile> {
    protected readonly oauthStrategyOptions: IOauthStrategyOptions;
    readonly verify: IVerify<Profile>;
    constructor(oauthStrategyOptions: IOauthStrategyOptions, verify: IVerify<Profile>);
    /**
     * Get Authorize Url
     *
     * @param authorize_base_url base authorize url
     * @param data the full authorize url required data
     * @returns the full authorize url, mostly used to redirect
     */
    protected abstract getAuthorizeUrl(authorize_base_url: string, data: IGetAuthorizeUrlData): Promise<string>;
    /**
     * Get Access Token
     *
     * @param token_url base token url
     * @param data the data required to get access token
     */
    protected abstract getAccessToken(token_url: string, data: IGetAccessTokenData): Promise<Token>;
    /**
     * Get Access User
     *
     * @param user_profile_url base user info url, here, just wants to openid, or user
     * @param access_token the getAccessToken() return data
     */
    protected abstract getAccessUser(user_profile_url: string, access_token: Token): Promise<Profile>;
    /**
     * @S1 Authenticate Flow
     *
     * @param ctx context
     * @returns redirect to authorization url
     */
    authenticate(ctx: Context): Promise<void>;
    /**
     * @S2 Callback Flow
     *
     * @param ctx context
     * @returns user profile
     */
    callback(ctx: Context): Promise<any>;
    getProfile(ctx: Context, token: IToken): Promise<Profile>;
    protected readonly utils: {
        fetch: typeof fetch;
        qs: typeof qs;
    };
}