import { fireEvent, render, screen } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { renderToStaticMarkup } from "react-dom/server";
import Contact from "./Contact";

/**
 * Sem atraso entre as teclas: com o atraso padrão, digitar o contexto longo (cerca de 130 caracteres) levava
 * mais de 5 s em máquina lenta e o teste estourava o tempo. O texto longo ainda entra por colagem.
 */
const setup = () => userEvent.setup({ delay: null });

/** Aba aberta de verdade; o Contact corta o vínculo com a página (opener = null) logo depois. */
let openedWindow: { opener: unknown };

beforeEach(() => {
  jest.replaceProperty(process.env, "NODE_ENV", "production");
  localStorage.setItem("evandro.analytics-consent.v1", "granted");
  delete window["ga-disable-G-QTT9QT0T3S"];
  window.gtag = jest.fn();
  openedWindow = { opener: {} };
  jest
    .spyOn(window, "open")
    .mockImplementation(() => openedWindow as unknown as Window);
});

afterEach(() => {
  jest.restoreAllMocks();
  localStorage.clear();
  delete window.gtag;
});

it("prepares an isolated WhatsApp draft with the entered project details only after submission", async () => {
  const user = setup();
  render(<Contact />);

  const name = "Ana & João";
  const email = "ana+projeto@example.com";
  const context =
    "Integrar pedidos & estoque? Objetivo: evitar retrabalho.\nPrazo: outubro #2026";
  await user.type(screen.getByRole("textbox", { name: /nome/i }), name);
  await user.type(screen.getByRole("textbox", { name: /e-mail/i }), email);
  const subject = screen.getByRole("combobox", { name: /tipo de projeto/i });
  await user.selectOptions(subject, "Integrações e automações");
  await user.click(screen.getByRole("textbox", { name: /contexto/i }));
  await user.paste(context);

  expect(window.open).not.toHaveBeenCalled();
  expect(window.gtag).not.toHaveBeenCalled();
  await user.click(screen.getByRole("button", { name: /whatsapp/i }));

  expect(window.open).toHaveBeenCalledTimes(1);
  const [destination, target, ...rest] = jest.mocked(window.open).mock.calls[0];
  const url = new URL(String(destination));
  expect(url.origin).toBe("https://wa.me");
  expect(url.pathname).toMatch(/^\/\d+$/);
  expect([...url.searchParams.keys()]).toEqual(["text"]);
  const message = url.searchParams.get("text");
  expect(message).toContain(name);
  expect(message).toContain(email);
  expect(message).toContain("Integrações e automações");
  expect(message).toContain(context);
  expect(target).toBe("_blank");
  // sem "noopener" na chamada (ele faria o window.open devolver sempre null); o vínculo é cortado depois
  expect(rest).toEqual([]);
  expect(openedWindow.opener).toBeNull();
  expect(window.gtag).toHaveBeenCalledTimes(1);
  expect(window.gtag).toHaveBeenCalledWith("event", "whatsapp_open", {
    send_to: "G-QTT9QT0T3S",
    service: "Contato",
    placement: "contact_form",
    page_path: "/",
    page_location: "https://evandro.dev.br/",
    page_referrer: "",
  });
});

it("does not open WhatsApp while required fields are empty or the email is invalid", async () => {
  const user = setup();
  render(<Contact />);

  const submit = screen.getByRole("button", { name: /whatsapp/i });
  await user.click(submit);
  expect(window.open).not.toHaveBeenCalled();

  await user.type(screen.getByRole("textbox", { name: /nome/i }), "Ana");
  await user.type(
    screen.getByRole("textbox", { name: /e-mail/i }),
    "email-invalido",
  );
  await user.type(
    screen.getByRole("textbox", { name: /contexto/i }),
    "Organizar pedidos",
  );
  await user.click(submit);
  expect(window.open).not.toHaveBeenCalled();
  expect(window.gtag).not.toHaveBeenCalled();
});

it("opens the project draft with analytics unavailable and consent denied", async () => {
  localStorage.setItem("evandro.analytics-consent.v1", "denied");
  delete window.gtag;
  const user = setup();
  render(<Contact />);
  await user.type(screen.getByRole("textbox", { name: /nome/i }), "Ana");
  await user.type(
    screen.getByRole("textbox", { name: /e-mail/i }),
    "ana@example.com",
  );
  await user.type(
    screen.getByRole("textbox", { name: /contexto/i }),
    "Organizar pedidos",
  );
  await user.click(screen.getByRole("button", { name: /whatsapp/i }));
  expect(window.open).toHaveBeenCalledTimes(1);
  const destination = new URL(
    String(jest.mocked(window.open).mock.calls[0][0]),
  );
  expect(destination.origin).toBe("https://wa.me");
  expect(destination.searchParams.get("text")).toContain("Organizar pedidos");
});

it("lets the visitor skip the e-mail and leaves that line out of the message", async () => {
  const user = setup();
  render(<Contact />);

  expect(screen.getByRole("textbox", { name: /e-mail/i })).not.toBeRequired();
  await user.type(screen.getByRole("textbox", { name: /nome/i }), "Ana");
  await user.type(
    screen.getByRole("textbox", { name: /contexto/i }),
    "Organizar pedidos",
  );
  await user.click(screen.getByRole("button", { name: /whatsapp/i }));

  expect(window.open).toHaveBeenCalledTimes(1);
  const url = new URL(String(jest.mocked(window.open).mock.calls[0][0]));
  const message = url.searchParams.get("text") ?? "";
  expect(message).toContain("Nome: Ana");
  expect(message).toContain("Tipo de projeto: Ainda preciso definir");
  expect(message).not.toContain("E-mail:");
});

it("offers 'Ainda preciso definir' as the first and default project type", () => {
  render(<Contact />);

  const subject = screen.getByRole("combobox", { name: /tipo de projeto/i });
  const options = Array.from(subject.querySelectorAll("option")).map(
    (option) => option.value,
  );
  expect(options[0]).toBe("Ainda preciso definir");
  expect(options).toContain("Site que traz pedidos pelo WhatsApp");
  expect(subject).toHaveValue("Ainda preciso definir");
});

it("labels the first field 'Seu nome'", () => {
  render(<Contact />);

  expect(screen.getByLabelText("Seu nome")).toHaveAttribute("name", "name");
  expect(screen.queryByLabelText("Nome completo")).toBeNull();
});

it("explains each invalid field in Portuguese and marks it for assistive technology", async () => {
  const user = setup();
  render(<Contact />);

  await user.type(
    screen.getByRole("textbox", { name: /e-mail/i }),
    "email-invalido",
  );
  await user.click(screen.getByRole("button", { name: /whatsapp/i }));

  const name = screen.getByRole("textbox", { name: /nome/i });
  const email = screen.getByRole("textbox", { name: /e-mail/i });
  const message = screen.getByRole("textbox", { name: /contexto/i });
  for (const field of [name, email, message]) {
    expect(field).toHaveAttribute("aria-invalid", "true");
  }
  expect(name).toHaveAccessibleDescription(
    "Informe seu nome para eu saber com quem falo.",
  );
  expect(email).toHaveAccessibleDescription(
    "Confira o e-mail: ele precisa ter o formato nome@empresa.com.br.",
  );
  expect(message).toHaveAccessibleDescription(
    /Conte em poucas palavras o que você precisa resolver\./,
  );
  expect(name).toHaveFocus();
  expect(window.open).not.toHaveBeenCalled();

  await user.type(name, "Ana");
  expect(name).not.toHaveAttribute("aria-invalid");
  expect(
    screen.queryByText("Informe seu nome para eu saber com quem falo."),
  ).toBeNull();
});

it("offers the same text by e-mail, below the WhatsApp button", async () => {
  const user = setup();
  render(<Contact />);

  await user.type(screen.getByRole("textbox", { name: /nome/i }), "Ana");
  await user.type(
    screen.getByRole("textbox", { name: /contexto/i }),
    "Organizar pedidos & estoque",
  );
  const submit = screen.getByRole("button", { name: /whatsapp/i });
  const mail = screen.getByRole("link", {
    name: "Prefere e-mail? Enviar por e-mail",
  });
  expect(
    submit.compareDocumentPosition(mail) & Node.DOCUMENT_POSITION_FOLLOWING,
  ).toBeTruthy();

  const href = mail.getAttribute("href") ?? "";
  expect(href.startsWith("mailto:evandrofonsecajunior@gmail.com?")).toBe(true);
  const url = new URL(href);
  expect(url.searchParams.get("subject")).toBe("Projeto pelo site");
  const body = url.searchParams.get("body") ?? "";
  expect(body).toContain("Nome: Ana");
  expect(body).toContain("Organizar pedidos & estoque");
  expect(body).toContain("Tipo de projeto: Ainda preciso definir");

  await user.click(mail);
  expect(window.gtag).toHaveBeenCalledWith(
    "event",
    "email_click",
    expect.objectContaining({ placement: "contact_form" }),
  );
});

it("does not call the direct WhatsApp row 'Contato'", () => {
  render(<Contact />);

  const direct = screen.getByRole("link", { name: /Prefere conversar direto/ });
  const text = new URL(direct.getAttribute("href") ?? "").searchParams.get(
    "text",
  );
  expect(text).toContain("Quero conversar sobre um projeto.");
  expect(text).not.toMatch(/sobre Contato/);
});

describe("e-mail draft validation", () => {
  it("does not open the e-mail client while the form is empty, and explains what is missing", () => {
    render(<Contact />);

    const mail = screen.getByRole("link", {
      name: "Prefere e-mail? Enviar por e-mail",
    });
    // fireEvent.click devolve false quando o clique foi cancelado (preventDefault)
    expect(fireEvent.click(mail)).toBe(false);

    expect(
      screen.getByText("Informe seu nome para eu saber com quem falo."),
    ).toBeVisible();
    expect(
      screen.getByText("Conte em poucas palavras o que você precisa resolver."),
    ).toBeVisible();
    expect(screen.getByRole("textbox", { name: /nome/i })).toHaveFocus();
    expect(window.gtag).not.toHaveBeenCalled();
  });

  it("blocks a malformed e-mail address the same way", async () => {
    const user = setup();
    render(<Contact />);
    await user.type(screen.getByRole("textbox", { name: /nome/i }), "Ana");
    await user.type(
      screen.getByRole("textbox", { name: /e-mail/i }),
      "email-invalido",
    );
    await user.type(
      screen.getByRole("textbox", { name: /contexto/i }),
      "Organizar pedidos",
    );

    const mail = screen.getByRole("link", {
      name: "Prefere e-mail? Enviar por e-mail",
    });
    expect(fireEvent.click(mail)).toBe(false);
    expect(screen.getByRole("textbox", { name: /e-mail/i })).toHaveFocus();
  });

  it("lets the click through, and measures it, once the form is valid", async () => {
    const user = setup();
    render(<Contact />);
    await user.type(screen.getByRole("textbox", { name: /nome/i }), "Ana");
    await user.type(
      screen.getByRole("textbox", { name: /contexto/i }),
      "Organizar pedidos",
    );

    const mail = screen.getByRole("link", {
      name: "Prefere e-mail? Enviar por e-mail",
    });
    // o clique não é cancelado pela validação: o navegador segue para o mailto:
    expect(fireEvent.click(mail)).toBe(true);

    expect(window.gtag).toHaveBeenCalledWith(
      "event",
      "email_click",
      expect.objectContaining({ placement: "contact_form" }),
    );
  });
});

describe("WhatsApp fallback", () => {
  it("goes to WhatsApp in the same page when the browser blocks the new tab", async () => {
    // o jsdom não navega: ele avisa "Not implemented: navigation" ao atribuir location.href
    const errors = jest.spyOn(console, "error").mockImplementation(() => {});
    jest.mocked(window.open).mockImplementation(() => null);
    const user = setup();
    render(<Contact />);
    await user.type(screen.getByRole("textbox", { name: /nome/i }), "Ana");
    await user.type(
      screen.getByRole("textbox", { name: /contexto/i }),
      "Organizar pedidos",
    );

    await user.click(screen.getByRole("button", { name: /whatsapp/i }));

    expect(window.open).toHaveBeenCalledTimes(1);
    expect(
      errors.mock.calls.some(([error]) =>
        String(error).includes("Not implemented: navigation"),
      ),
    ).toBe(true);
    expect(window.gtag).toHaveBeenCalledWith(
      "event",
      "whatsapp_open",
      expect.objectContaining({ placement: "contact_form" }),
    );
  });

  it("does not navigate the page when the new tab opened", async () => {
    const errors = jest.spyOn(console, "error").mockImplementation(() => {});
    const user = setup();
    render(<Contact />);
    await user.type(screen.getByRole("textbox", { name: /nome/i }), "Ana");
    await user.type(
      screen.getByRole("textbox", { name: /contexto/i }),
      "Organizar pedidos",
    );

    await user.click(screen.getByRole("button", { name: /whatsapp/i }));

    expect(errors).not.toHaveBeenCalled();
  });

  /** Preenche o mínimo e envia; devolve os erros que o jsdom registrou ao "navegar" para location.href. */
  async function submitWithMinimumFields() {
    const errors = jest.spyOn(console, "error").mockImplementation(() => {});
    const user = setup();
    render(<Contact />);
    await user.type(screen.getByRole("textbox", { name: /nome/i }), "Ana");
    await user.type(
      screen.getByRole("textbox", { name: /contexto/i }),
      "Organizar pedidos",
    );
    await user.click(screen.getByRole("button", { name: /whatsapp/i }));
    return errors;
  }

  const navigated = (errors: jest.SpyInstance) =>
    errors.mock.calls.some(([error]) =>
      String(error).includes("Not implemented: navigation"),
    );

  it("goes to WhatsApp in the same page when there is no window.open", async () => {
    const original = window.open;
    Object.defineProperty(window, "open", {
      configurable: true,
      value: undefined,
    });
    try {
      const errors = await submitWithMinimumFields();

      expect(navigated(errors)).toBe(true);
      expect(window.gtag).toHaveBeenCalledWith(
        "event",
        "whatsapp_open",
        expect.objectContaining({ placement: "contact_form" }),
      );
    } finally {
      Object.defineProperty(window, "open", {
        configurable: true,
        value: original,
      });
    }
  });

  it("goes to WhatsApp in the same page when window.open throws", async () => {
    jest.mocked(window.open).mockImplementation(() => {
      throw new DOMException("bloqueado", "SecurityError");
    });

    const errors = await submitWithMinimumFields();

    expect(navigated(errors)).toBe(true);
  });

  it("closes the new tab and stays on the same page when its link to this page cannot be cut", async () => {
    const close = jest.fn();
    const tab = {
      close,
      get opener() {
        return {};
      },
      set opener(_value: unknown) {
        throw new DOMException("sem acesso", "SecurityError");
      },
    };
    jest.mocked(window.open).mockImplementation(() => tab as unknown as Window);

    const errors = await submitWithMinimumFields();

    expect(close).toHaveBeenCalledTimes(1);
    expect(navigated(errors)).toBe(true);
    expect(window.gtag).toHaveBeenCalledWith(
      "event",
      "whatsapp_open",
      expect.objectContaining({ placement: "contact_form" }),
    );
  });
});

describe("without JavaScript", () => {
  it("keeps the form body out of the way and offers direct WhatsApp and e-mail links in a <noscript>", () => {
    const html = renderToStaticMarkup(<Contact />);

    const noscript = html.match(/<noscript>([\s\S]*?)<\/noscript>/)?.[1] ?? "";
    expect(noscript).toMatch(/href="https:\/\/wa\.me\/\d+\?text=/);
    expect(noscript).toContain('href="mailto:evandrofonsecajunior@gmail.com"');
    // o botão de envio e os campos ficam na área "js-only", que app/layout.tsx esconde sem JavaScript
    const jsOnly = html.match(/class="js-only[^"]*"/);
    expect(jsOnly).not.toBeNull();
    expect(html.indexOf("js-only")).toBeLessThan(
      html.indexOf("Continuar no WhatsApp"),
    );
    expect(html.indexOf("Continuar no WhatsApp")).toBeLessThan(
      html.indexOf("<noscript>"),
    );
  });
});