/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
declare var gtag: Gtag.Gtag;
declare namespace Gtag {
    interface GtagCommands {
        config: [
            targetId: string,
            config?: ControlParams | EventParams | ConfigParams | CustomParams
        ];
        set: [targetId: string, config: CustomParams | boolean | string] | [config: CustomParams];
        js: [config: Date];
        event: [
            eventName: EventNames | (string & {}),
            eventParams?: ControlParams | EventParams | CustomParams
        ];
        get: [
            targetId: string,
            fieldName: FieldNames | string,
            callback?: (field: string | CustomParams | undefined) => any
        ];
        consent: [
            consentArg: ConsentArg | (string & {}),
            consentParams: ConsentParams
        ];
    }
    interface Gtag {
        <Command extends keyof GtagCommands>(command: Command, ...args: GtagCommands[Command]): void;
    }
    interface ConfigParams {
        page_title?: string | undefined;
        page_location?: string | undefined;
        page_path?: string | undefined;
        send_page_view?: boolean | undefined;
    }
    interface CustomParams {
        [key: string]: any;
    }
    interface ControlParams {
        groups?: string | string[] | undefined;
        send_to?: string | string[] | undefined;
        event_callback?: (() => void) | undefined;
        event_timeout?: number | undefined;
    }
    type EventNames = 'add_payment_info' | 'add_shipping_info' | 'add_to_cart' | 'add_to_wishlist' | 'begin_checkout' | 'checkout_progress' | 'earn_virtual_currency' | 'exception' | 'generate_lead' | 'join_group' | 'level_end' | 'level_start' | 'level_up' | 'login' | 'page_view' | 'post_score' | 'purchase' | 'refund' | 'remove_from_cart' | 'screen_view' | 'search' | 'select_content' | 'select_item' | 'select_promotion' | 'set_checkout_option' | 'share' | 'sign_up' | 'spend_virtual_currency' | 'tutorial_begin' | 'tutorial_complete' | 'unlock_achievement' | 'timing_complete' | 'view_cart' | 'view_item' | 'view_item_list' | 'view_promotion' | 'view_search_results';
    interface EventParams {
        checkout_option?: string | undefined;
        checkout_step?: number | undefined;
        content_id?: string | undefined;
        content_type?: string | undefined;
        coupon?: string | undefined;
        currency?: string | undefined;
        description?: string | undefined;
        fatal?: boolean | undefined;
        items?: Item[] | undefined;
        method?: string | undefined;
        number?: string | undefined;
        promotions?: Promotion[] | undefined;
        screen_name?: string | undefined;
        search_term?: string | undefined;
        shipping?: Currency | undefined;
        tax?: Currency | undefined;
        transaction_id?: string | undefined;
        value?: number | undefined;
        event_label?: string | undefined;
        event_category?: string | undefined;
        /** @see {@link https://developers.google.com/analytics/devguides/collection/gtagjs/sending-data#specify_different_transport_mechanisms specify_different_transport_mechanisms} */
        transport_type?: 'image' | 'xhr' | 'beacon' | undefined;
    }
    type Currency = string | number;
    /**
     * Interface of an item object used in lists for this event.
     *
     * Reference:
     * @see {@link https://developers.google.com/analytics/devguides/collection/ga4/reference/events#view_item_item view_item_item}
     * @see {@link https://developers.google.com/analytics/devguides/collection/ga4/reference/events#view_item_list_item view_item_list_item}
     * @see {@link https://developers.google.com/analytics/devguides/collection/ga4/reference/events#select_item_item select_item_item}
     * @see {@link https://developers.google.com/analytics/devguides/collection/ga4/reference/events#add_to_cart_item add_to_cart_item}
     * @see {@link https://developers.google.com/analytics/devguides/collection/ga4/reference/events#view_cart_item view_cart_item}
     */
    interface Item {
        item_id?: string | undefined;
        item_name?: string | undefined;
        affiliation?: string | undefined;
        coupon?: string | undefined;
        currency?: string | undefined;
        creative_name?: string | undefined;
        creative_slot?: string | undefined;
        discount?: Currency | undefined;
        index?: number | undefined;
        item_brand?: string | undefined;
        item_category?: string | undefined;
        item_category2?: string | undefined;
        item_category3?: string | undefined;
        item_category4?: string | undefined;
        item_category5?: string | undefined;
        item_list_id?: string | undefined;
        item_list_name?: string | undefined;
        item_variant?: string | undefined;
        location_id?: string | undefined;
        price?: Currency | undefined;
        promotion_id?: string | undefined;
        promotion_name?: string | undefined;
        quantity?: number | undefined;
    }
    interface Promotion {
        creative_name?: string | undefined;
        creative_slot?: string | undefined;
        promotion_id?: string | undefined;
        promotion_name?: string | undefined;
    }
    type FieldNames = 'client_id' | 'session_id' | 'gclid';
    type ConsentArg = 'default' | 'update';
    /**
     * Reference:
     * @see {@link https://support.google.com/tagmanager/answer/10718549#consent-types consent-types}
     * @see {@link https://developers.google.com/tag-platform/devguides/consent consent}
     */
    interface ConsentParams {
        ad_personalization?: 'granted' | 'denied' | undefined;
        ad_user_data?: 'granted' | 'denied' | undefined;
        ad_storage?: 'granted' | 'denied' | undefined;
        analytics_storage?: 'granted' | 'denied' | undefined;
        functionality_storage?: 'granted' | 'denied' | undefined;
        personalization_storage?: 'granted' | 'denied' | undefined;
        security_storage?: 'granted' | 'denied' | undefined;
        wait_for_update?: number | undefined;
        region?: string[] | undefined;
    }
}