OTP 入力

<%# Markup for the otp (OTP PIN passcode) demo.
    Provides auto-advance on entry in each field, Backspace to go back, paste
    distribution, and value sync. %>
<div
  class="otp-demo"
  id="otp-passcode"
  data-controller="stimeo--otp"
  data-stimeo--otp-length-value="6"
  data-stimeo--otp-pattern-value="[0-9]"
  role="group"
  aria-label="<%= t("components.otp.demo.label") %>"
>
  
  <div class="otp-demo__label"><%= t("components.otp.demo.label") %></div>
  
  <div class="otp-demo__fields">
    <% 6.times do |i| %>
      <input
        class="otp-demo__field"
        type="text"
        inputmode="numeric"
        maxlength="1"
        data-stimeo--otp-target="field"
        data-action="
          input->stimeo--otp#onInput
          keydown->stimeo--otp#onKeydown
          paste->stimeo--otp#onPaste
        "
        aria-label="<%= t("components.otp.demo.digit_label", position: i + 1) %>"
      />
    <% end %>
  </div>

  <input
    type="hidden"
    data-stimeo--otp-target="value"
    name="otp"
  />

  <%# Region for invalid-input / full-width-character warning messages. %>
  <div
    data-stimeo--otp-target="error"
    id="otp-error-message"
    class="otp-demo__error"
    role="alert"
    aria-live="polite"
    hidden
  >
    <span class="otp-demo__error-badge">!</span>
    <span class="otp-demo__error-text">
      <%= t("components.otp.demo.invalid_msg") %>
    </span>
  </div>

  <%# Placeholder for the completion celebration message. %>
  <div id="otp-complete-message" class="otp-demo__message" style="display: none;">
    <span class="otp-demo__success-badge">✓</span>
    <span class="otp-demo__success-text">
      <%= t("components.otp.demo.complete_msg") %>
      <strong id="otp-success-code"></strong>
    </span>
  </div>
</div>

/*
 * Presentation-only styles for the otp demo.
 * Whether a field is filled switches on data-filled (set by the library).
 */

.otp-demo {
  display: inline-block;
  font-family: inherit;
}

.otp-demo__label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}

.otp-demo__fields {
  display: flex;
  gap: 0.5rem;
}

.otp-demo__field {
  width: 3rem;
  height: 3.5rem;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--fg);
  background: var(--surface-card);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  outline: none;
  transition: all 0.15s ease;
}

/* Filled state (data-filled). */
.otp-demo__field[data-filled="true"] {
  border-color: var(--border-interactive);
}

/* Focus state. */
.otp-demo__field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.15);
}

.otp-demo__message {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--leaf-50);
  border: 1px solid var(--leaf-50);
  border-radius: 8px;
  animation: otpFadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.otp-demo__success-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--leaf-500);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: bold;
}

.otp-demo__success-text {
  font-size: 0.875rem;
  color: var(--leaf-500);
}

.otp-demo__error {
  margin-top: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--danger-50);
  border: 1px solid var(--ruby-200);
  border-radius: 8px;
  animation: otpFadeIn 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Stimeo controls visibility only via the hidden attribute (behavior only); the styling reads
   that state. */
.otp-demo__error[hidden] {
  display: none;
}

.otp-demo__error-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: var(--danger-500);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: bold;
}

.otp-demo__error-text {
  font-size: 0.875rem;
  color: var(--color-accent);
}

@keyframes otpFadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

// Demo script that catches the complete event and shows a celebration message.
document.getElementById('otp-passcode').addEventListener('stimeo--otp:complete', function (e) {
  const msg = document.getElementById('otp-complete-message');
  const code = document.getElementById('otp-success-code');
  if (msg && code) {
    code.textContent = e.detail.value;
    msg.style.display = 'flex';
  }
});

// Hide the message when the value changes.
// Backspace clears values programmatically in the controller, so the native input
// event doesn't fire — subscribe to stimeo--otp:change instead.
document.getElementById('otp-passcode').addEventListener('stimeo--otp:change', function (e) {
  const fields = Array.from(document.querySelectorAll('.otp-demo__field'));
  const filled = fields.every((f) => f.value.length > 0);
  if (!filled) {
    const msg = document.getElementById('otp-complete-message');
    if (msg) msg.style.display = 'none';
  }
});