import { readFileSync } from "node:fs";
import { join } from "node:path";
import ts from "typescript";

/**
 * Caminhos de lib/analytics.ts quando não existe `window` (renderização no servidor): nenhum rastreio,
 * nenhuma conversão e nenhum erro. O setup do projeto exige o jsdom e o `window` dele não pode ser
 * escondido, então o próprio fonte é transpilado e executado com `window` e `localStorage` indefinidos.
 */

type AnalyticsModule = typeof import("./analytics");

const ADS_LABEL = "NEXT_PUBLIC_GOOGLE_ADS_CONVERSION_LABEL";

function loadWithoutWindow(storage?: Storage): AnalyticsModule {
  const source = readFileSync(join(process.cwd(), "lib/analytics.ts"), "utf8");
  const { outputText } = ts.transpileModule(source, {
    compilerOptions: {
      module: ts.ModuleKind.CommonJS,
      target: ts.ScriptTarget.ES2020,
    },
  });
  const loaded = { exports: {} as AnalyticsModule };
  new Function("module", "exports", "window", "localStorage", outputText)(
    loaded,
    loaded.exports,
    undefined,
    storage,
  );
  return loaded.exports;
}

let gtag: jest.Mock;

beforeEach(() => {
  jest.replaceProperty(process.env, "NODE_ENV", "production");
  process.env[ADS_LABEL] = "abc123";
  localStorage.setItem("evandro.analytics-consent.v1", "granted");
  gtag = jest.fn();
  window.gtag = gtag;
});

afterEach(() => {
  jest.restoreAllMocks();
  localStorage.clear();
  delete window.gtag;
  delete process.env[ADS_LABEL];
});

describe("analytics without a window", () => {
  it("path: every tracker is silent and never throws, even with granted consent and a conversion label", () => {
    // o consentimento está "granted" no storage real: só a ausência de `window` impede o envio
    const analytics = loadWithoutWindow(localStorage);

    expect(() => {
      analytics.trackWhatsAppOpen({
        service: "Contato",
        placement: "floating",
      });
      analytics.trackEmailClick({ placement: "footer" });
      analytics.trackSocialClick({ network: "linkedin" });
      analytics.trackCvDownload({ placement: "curriculo" });
    }).not.toThrow();
    expect(gtag).not.toHaveBeenCalled();
  });

  it("path: readConsent finds no storage -> null", () => {
    expect(loadWithoutWindow().readConsent()).toBeNull();
  });

  it("path: openCookiePreferences has no window to notify -> returns without error", () => {
    const listener = jest.fn();
    window.addEventListener("evandro:open-cookie-preferences", listener);

    expect(() => loadWithoutWindow().openCookiePreferences()).not.toThrow();

    window.removeEventListener("evandro:open-cookie-preferences", listener);
    expect(listener).not.toHaveBeenCalled();
  });

  it("control: the same source with a window does dispatch the reopen event", () => {
    const listener = jest.fn();
    window.addEventListener("evandro:open-cookie-preferences", listener);
    const source = readFileSync(
      join(process.cwd(), "lib/analytics.ts"),
      "utf8",
    );
    const { outputText } = ts.transpileModule(source, {
      compilerOptions: { module: ts.ModuleKind.CommonJS },
    });
    const loaded = { exports: {} as AnalyticsModule };
    new Function("module", "exports", "window", outputText)(
      loaded,
      loaded.exports,
      window,
    );

    loaded.exports.openCookiePreferences();

    window.removeEventListener("evandro:open-cookie-preferences", listener);
    expect(listener).toHaveBeenCalledTimes(1);
  });
});