import { Http } from "./http";

type ABServiceResponse = {
    experiment: string;
    variant: {
        id: string;
    };
};
/**
 * Gets variant for a user from AB Experiment service
 * @param {string} userId Stable Identifier for a given user.
 * @export
 * @return {Promise<string>} AB Variant Identifier, composed of experiment and variant ids.
 */
export async function getAbVariantId(userId: string): Promise<string> {
    const response = await Http.get(`${window._RecSys.Bundle.Properties.osiris.variant.path}/${userId}`);

    if (!Http.ok(response.status)) return "null-null";

    const body: ABServiceResponse = await response.json();

    return `${body.experiment}-${body.variant.id}`;
}