import { describe, expect, it } from "vitest";
import { readFileSync, statSync } from "node:fs";
import { gzipSync } from "node:zlib";
import { fileURLToPath } from "node:url";
import { dirname, join } from "node:path";

const here = dirname(fileURLToPath(import.meta.url));
const widgetPath = join(here, "..", "public", "embed", "widget.js");

describe("widget.js bootstrap loader", () => {
  it("is checked into apps/web/public/embed/widget.js", () => {
    expect(statSync(widgetPath).isFile()).toBe(true);
  });

  it("stays under the 3KB gzipped budget", () => {
    const raw = readFileSync(widgetPath);
    const gz = gzipSync(raw);
    // 3 KB = 3 * 1024 = 3072 bytes
    expect(gz.byteLength).toBeLessThan(3072);
  });

  it("stays under the 5KB raw budget", () => {
    const raw = readFileSync(widgetPath);
    expect(raw.byteLength).toBeLessThan(5 * 1024);
  });

  it("references the embed forms route path", () => {
    const text = readFileSync(widgetPath, "utf8");
    expect(text).toContain("/embed/forms/");
  });

  it("uses a sandboxed iframe", () => {
    const text = readFileSync(widgetPath, "utf8");
    expect(text).toContain("sandbox");
    expect(text).toContain("allow-scripts");
  });

  it("listens for postMessage resize / submitted / error events", () => {
    const text = readFileSync(widgetPath, "utf8");
    expect(text).toContain("tcform:resize");
    expect(text).toContain("tcform:submitted");
    expect(text).toContain("tcform:error");
  });
});