import type { WidgetData } from "../../domain";
import { getUserId } from "../UserIdentificationService";

/**
 * Build a unique storage ID from instanceKey, journey, and userId.
 * Uses the format: instanceKey:journey:userId (filters out falsy values)
 *
 * @param instanceKey - The widget instance key
 * @param data - The widget data containing journey/form_id and user identification
 * @returns A colon-separated storage ID string
 */
export function buildStorageId(instanceKey: string, data: WidgetData): string {
    const userId = getUserId(data);
    return [instanceKey, data?.journey, userId].filter(Boolean).join(':');
}