export interface BotDetectionServiceCfg {
    /**
     * Defaults to true.
     * Set to false if you need to disable it under certain conditions (e.g in Angular unit tests so it doesn't scream 'Error!')
     */
    enabled?: boolean;
    /**
     * Defaults to false.
     * If true - the instance will memoize (remember) the results of the detection
     * and won't re-run it.
     */
    memoizeResults?: boolean;
    /**
     * Defaults to false.
     * If set to true: `getBotReason()` would return BotReason.CDP if CDP is detected.
     * Otherwise - `getBotReason()` will not perform the CDP check.
     */
    treatCDPAsBotReason?: boolean;
}
/**
 * Service to detect bots and CDP (Chrome DevTools Protocol).
 *
 * @experimental
 */
export declare class BotDetectionService {
    cfg: BotDetectionServiceCfg;
    constructor(cfg?: BotDetectionServiceCfg);
    private botReason;
    private cdp;
    isBotOrCDP(): boolean;
    isBot(): boolean;
    /**
     * Returns null if it's not a Bot,
     * otherwise a truthy BotReason.
     */
    getBotReason(): BotReason | null;
    private detectBotReason;
    /**
     * CDP stands for Chrome DevTools Protocol.
     * This function tests if the current environment is a CDP environment.
     * If it's true - it's one of:
     *
     * 1. Bot, automated with CDP, e.g Puppeteer, Playwright or such.
     * 2. Developer with Chrome DevTools open.
     *
     * 2 is certainly not a bot, but unfortunately we can't distinguish between the two.
     * That's why this function is not part of `isBot()`, because it can give "false positive" with DevTools.
     *
     * Based on: https://deviceandbrowserinfo.com/learning_zone/articles/detecting-headless-chrome-puppeteer-2024
     */
    isCDP(): boolean;
    private detectCDP;
}
export declare enum BotReason {
    NoNavigator = 1,
    NoUserAgent = 2,
    UserAgent = 3,
    WebDriver = 4,
    EmptyLanguages = 6,
    /**
     * This is when CDP is considered to be a reason to be a Bot.
     * By default it's not.
     */
    CDP = 8
}