/**
 * Footer newsletter validation (client-side).
 * Loaded by layout.js after footer inject.
 */
(function () {
  var EMAIL_RE = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;

  function initNewsletter(root) {
    var form = root.querySelector("#aifo-footer-newsletter");
    if (!form) return;

    var field = form.querySelector("#aifo-footer-newsletter-field");
    var input = form.querySelector('[name="email"]');
    var errorEl = form.querySelector("#aifo-footer-newsletter-error");
    var errorTextEl = errorEl
      ? errorEl.querySelector(".aifo-foot__form-tooltip-text")
      : null;
    var successEl = form.querySelector("#aifo-footer-newsletter-success");

    function hideMessages() {
      if (errorEl) errorEl.hidden = true;
      if (successEl) successEl.hidden = true;
      if (field) field.classList.remove("is-invalid");
    }

    function showError(message) {
      if (errorEl) {
        if (errorTextEl) {
          errorTextEl.textContent = message;
        } else {
          errorEl.textContent = message;
        }
        errorEl.hidden = false;
      }
      if (successEl) successEl.hidden = true;
      if (field) field.classList.add("is-invalid");
    }

    function showSuccess(message) {
      if (successEl) {
        successEl.textContent = message;
        successEl.hidden = false;
      }
      if (errorEl) errorEl.hidden = true;
      if (field) field.classList.remove("is-invalid");
    }

    form.addEventListener("submit", function (e) {
      e.preventDefault();
      var value = (input.value || "").trim();

      if (!value) {
        showError("Please enter your email address.");
        input.focus();
        return;
      }

      if (!EMAIL_RE.test(value)) {
        showError("Please enter a valid email address.");
        input.focus();
        return;
      }

      showSuccess("Thank you for subscribing!");
      form.reset();
    });

    input.addEventListener("input", hideMessages);
    input.addEventListener("blur", function () {
      var value = (input.value || "").trim();
      if (!value) {
        hideMessages();
        return;
      }
      if (!EMAIL_RE.test(value)) {
        showError("Please enter a valid email address.");
      }
    });
  }

  window.initAifoFooter = function (root) {
    if (!root) return;
    initNewsletter(root);
  };
})();