{{ define "content" }}
<div class="container py-5">
  <h2>Your Inbox</h2>

  {{ if .Messages }}
    <ul class="list-group mb-4">
      {{ range .Messages }}
        <li class="list-group-item d-flex justify-content-between align-items-center {{ if .IsRead }}read{{ end }}" data-msg-id="{{ .ID }}">
          <div>
            <a href="/account/messages/read?id={{ .ID }}" class="fw-bold text-dark">{{ .Subject }}</a><br>
            <small class="text-muted">{{ .CreatedAt.Format "02 Jan 2006 15:04" }}</small>
          </div>

          <div class="d-flex gap-2 align-items-center">

            {{/* Archive form (existing) */}}
            <form method="POST" action="/account/messages/archive" class="m-0">
              <input type="hidden" name="csrf_token" value="{{ $.CSRFToken }}">
              <input type="hidden" name="id" value="{{ .ID }}">
              <button type="submit" class="btn btn-sm btn-outline-secondary">Archive</button>
            </form>

            {{/* Mark-read: only show when unread */}}
            {{ if not .IsRead }}
              <!-- Non-AJAX fallback form (submit will refresh) -->
              <form method="POST" action="/account/messages/mark-read" class="m-0 d-inline-block mark-read-form">
                <input type="hidden" name="csrf_token" value="{{ $.CSRFToken }}">
                <input type="hidden" name="id" value="{{ .ID }}">
                <button type="submit" class="btn btn-sm btn-outline-primary mark-read-btn"
                        data-msg-id="{{ .ID }}"
                        data-csrf="{{ $.CSRFToken }}">Mark read</button>
              </form>
            {{ end }}
          </div>
        </li>
      {{ end }}
    </ul>

    <nav>
      <ul class="pagination">
        {{ if gt .CurrentPage 1 }}
        <li class="page-item">
          <a class="page-link" href="?page={{ sub .CurrentPage 1 }}">Previous</a>
        </li>
        {{ end }}

        {{ range $i := .PageRange }}
        <li class="page-item {{ if eq $i $.CurrentPage }}active{{ end }}">
          <a class="page-link" href="?page={{ $i }}">{{ $i }}</a>
        </li>
        {{ end }}

        {{ if lt .CurrentPage .TotalPages }}
        <li class="page-item">
          <a class="page-link" href="?page={{ add .CurrentPage 1 }}">Next</a>
        </li>
        {{ end }}
      </ul>
    </nav>
  {{ else }}
    <div class="alert alert-info text-center">No messages found.</div>
  {{ end }}

  <div class="mt-3">
    <a href="/account/messages/send" class="btn btn-primary">Compose Message</a>
    <a href="/account/messages/archive" class="btn btn-outline-secondary ms-2">View Archived</a>
  </div>
</div>

{{/* AJAX enhancement: unobtrusive — safe fallback to regular form when JS disabled */}}
<script>
;(function(){
  // Ensure browser supports fetch + FormData; otherwise we fallback to regular form submit.
  if (!window.fetch || !window.FormData) return;

  // Helper to decrement topbar message count badge (assumes badge element id="message-count")
  function decrementMessageCount() {
    var el = document.getElementById('message-count');
    if (!el) return;
    var current = parseInt(el.textContent || el.innerText || '0', 10) || 0;
    var next = Math.max(0, current - 1);
    if (next <= 0) {
      // remove badge or hide it
      el.remove();
    } else {
      el.textContent = String(next);
    }
  }

  // Handle clicks on mark-read buttons, submit via fetch, update DOM
  document.addEventListener('click', function(e){
    var btn = e.target.closest('.mark-read-btn');
    if (!btn) return;

    // Prevent the default form POST (non-AJAX fallback)
    e.preventDefault();

    var msgID = btn.dataset.msgId;
    var csrf  = btn.dataset.csrf;

    if (!msgID) {
      // fallback to normal submit if something's wrong
      var frm = btn.closest('form');
      if (frm) frm.submit();
      return;
    }

    // Build urlencoded body like a regular form
    var body = new URLSearchParams();
    body.append('id', msgID);
    if (csrf) body.append('csrf_token', csrf);

    fetch('/account/messages/mark-read', {
      method: 'POST',
      headers: {
        'Content-Type': 'application/x-www-form-urlencoded'
      },
      body: body.toString(),
      credentials: 'same-origin'
    }).then(function(resp){
      if (resp.ok) {
        // UI update: remove the mark-read button, give item a .read class, update topbar count
        var li = document.querySelector('li[data-msg-id="' + msgID + '"]');
        if (li) {
          li.classList.add('read');
          // remove any mark-read form/button inside
          var form = li.querySelector('.mark-read-form');
          if (form) form.remove();
        }
        decrementMessageCount();
      } else {
        // If server returned non-2xx, fall back to full reload to show flash
        resp.text().then(function(){ window.location.reload(); }).catch(function(){ window.location.reload(); });
      }
    }).catch(function(){ window.location.reload(); });
  }, false);
})();
</script>
{{ end }}