import { beforeEach, describe, expect, it } from "vitest";
import { _resetAnalyticsQueue, track } from "@/lib/analytics";

describe("analytics layer", () => {
  beforeEach(() => {
    window.dataLayer = [];
    window.sessionStorage.clear();
    window.localStorage.clear();
    window.history.replaceState({}, "", "/?utm_source=google&utm_campaign=brand&gclid=G");
    _resetAnalyticsQueue();
  });

  it("pushes named events with attribution and device props, without PII", () => {
    track("campus_selected", { campus: "norwood", selection_source: "manual" });
    const evt = (window.dataLayer as Record<string, unknown>[]).at(-1)!;
    expect(evt.event).toBe("campus_selected");
    expect(evt.campus).toBe("norwood");
    expect(evt.source).toBe("google");
    expect(evt.campaign).toBe("brand");
    expect(evt.platform).toBe("google");
    expect(evt.variant).toBe("a");
    expect(["mobile", "tablet", "desktop"]).toContain(evt.device_category);
    expect(JSON.stringify(evt)).not.toMatch(/@|phone/);
  });

  it("dispatches a DOM event for custom listeners", () => {
    const seen: string[] = [];
    window.addEventListener("wc:analytics", (e) => seen.push((e as CustomEvent).detail.event));
    track("text_us_clicked", { location: "header" });
    expect(seen).toEqual(["text_us_clicked"]);
  });
});