(function () {
  const loginForm = document.getElementById("login-form");
  const registerForm = document.getElementById("register-form");
  const errorEl = document.getElementById("auth-error");

  function setError(msg) {
    if (!errorEl) return;
    if (!msg) {
      errorEl.classList.add("hidden");
      errorEl.textContent = "";
      return;
    }
    errorEl.textContent = msg;
    errorEl.classList.remove("hidden");
  }

  async function postJSON(url, payload) {
    const res = await fetch(url, {
      method: "POST",
      credentials: "include",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(payload),
    });
    const body = await res.json().catch(() => ({}));
    if (!res.ok) {
      throw new Error(body.error || "Request failed");
    }
    return body;
  }

  if (loginForm) {
    loginForm.addEventListener("submit", async (e) => {
      e.preventDefault();
      setError("");
      const fd = new FormData(loginForm);
      try {
        await postJSON("/api/auth/local/login", {
          username: fd.get("username"),
          password: fd.get("password"),
        });
        window.location.href = "/jobs";
      } catch (err) {
        setError(err.message);
      }
    });
  }

  if (registerForm) {
    registerForm.addEventListener("submit", async (e) => {
      e.preventDefault();
      setError("");
      const fd = new FormData(registerForm);
      try {
        await postJSON("/api/auth/local/register", {
          name: fd.get("name"),
          email: fd.get("email"),
          password: fd.get("password"),
        });
        window.location.href = "/jobs";
      } catch (err) {
        setError(err.message);
      }
    });
  }
})();