{% extends "base.html" %}
{% block title %}Notifications{% endblock %}

{% block content %}
<div class="row mb-3 align-items-center">
  <div class="col">
    <h4 class="mb-0">
      <i class="bi bi-bell-fill text-primary me-2"></i>Notifications
      {% if unread_count > 0 %}
      <span class="badge bg-danger ms-1" style="font-size:.6rem;vertical-align:middle;">
        {{ unread_count }} unread
      </span>
      {% endif %}
    </h4>
  </div>
  <div class="col-auto d-flex gap-2">
    <a href="{{ url_for('notifications.preferences') }}" class="btn btn-outline-secondary btn-sm">
      <i class="bi bi-gear"></i> Preferences
    </a>
    {% if unread_count > 0 %}
    <form method="post" action="{{ url_for('notifications.mark_all_read') }}" class="mb-0">
      <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
      <button type="submit" class="btn btn-outline-primary btn-sm">
        <i class="bi bi-check2-all"></i> Mark all read
      </button>
    </form>
    {% endif %}
  </div>
</div>

{# ── Filter tabs ── #}
<ul class="nav nav-tabs mb-3">
  <li class="nav-item">
    <a class="nav-link {% if filter_read == 'all' %}active{% endif %}"
       href="{{ url_for('notifications.index', filter='all') }}">All</a>
  </li>
  <li class="nav-item">
    <a class="nav-link {% if filter_read == 'unread' %}active{% endif %}"
       href="{{ url_for('notifications.index', filter='unread') }}">Unread</a>
  </li>
  <li class="nav-item">
    <a class="nav-link {% if filter_read == 'read' %}active{% endif %}"
       href="{{ url_for('notifications.index', filter='read') }}">Read</a>
  </li>
</ul>

{# ── Notification list ── #}
{% if notifications.items %}
<div class="card shadow-sm">
  <ul class="list-group list-group-flush">
    {% for n in notifications.items %}
    <li class="list-group-item px-3 py-3
               {% if not n.is_read %}list-group-item-light border-start border-primary border-3{% endif %}">
      <div class="d-flex justify-content-between align-items-start">
        <div class="flex-grow-1">
          <div class="d-flex align-items-center gap-2 mb-1">
            {% if not n.is_read %}
            <span class="badge bg-primary" style="font-size:.65rem;">New</span>
            {% endif %}
            <span class="fw-semibold" style="font-size:.9rem;">{{ n.title }}</span>
          </div>
          <p class="mb-1 text-secondary" style="font-size:.85rem;">{{ n.body }}</p>
          <small class="text-muted">
            <i class="bi bi-clock me-1"></i>{{ n.created_at.strftime('%b %d, %Y %I:%M %p') }}
          </small>
        </div>
        <div class="d-flex gap-2 ms-3 flex-shrink-0">
          {% if n.link %}
          <a href="{{ n.link }}" class="btn btn-sm btn-outline-primary">
            <i class="bi bi-arrow-right"></i> View
          </a>
          {% endif %}
          {% if not n.is_read %}
          <button type="button"
                  class="btn btn-sm btn-outline-secondary mark-read-btn"
                  data-notif-id="{{ n.id }}"
                  data-url="{{ url_for('notifications.mark_read', notif_id=n.id) }}"
                  title="Mark as read">
            <i class="bi bi-check2"></i>
          </button>
          {% endif %}
        </div>
      </div>
    </li>
    {% endfor %}
  </ul>
</div>

{# ── Pagination ── #}
{% if notifications.pages > 1 %}
<nav class="mt-3">
  <ul class="pagination pagination-sm justify-content-center">
    <li class="page-item {% if not notifications.has_prev %}disabled{% endif %}">
      <a class="page-link"
         href="{{ url_for('notifications.index', page=notifications.prev_num, filter=filter_read) }}">
        &laquo; Prev
      </a>
    </li>
    {% for p in notifications.iter_pages(left_edge=1, right_edge=1, left_current=2, right_current=2) %}
      {% if p %}
      <li class="page-item {% if p == notifications.page %}active{% endif %}">
        <a class="page-link"
           href="{{ url_for('notifications.index', page=p, filter=filter_read) }}">{{ p }}</a>
      </li>
      {% else %}
      <li class="page-item disabled"><span class="page-link">…</span></li>
      {% endif %}
    {% endfor %}
    <li class="page-item {% if not notifications.has_next %}disabled{% endif %}">
      <a class="page-link"
         href="{{ url_for('notifications.index', page=notifications.next_num, filter=filter_read) }}">
        Next &raquo;
      </a>
    </li>
  </ul>
</nav>
{% endif %}

{% else %}
<div class="text-center py-5 text-muted">
  <i class="bi bi-bell-slash fs-1 d-block mb-3"></i>
  <p class="mb-0">No notifications found.</p>
</div>
{% endif %}
{% endblock %}

{% block extra_js %}
<script>
document.querySelectorAll('.mark-read-btn').forEach(function(btn) {
  btn.addEventListener('click', function() {
    var url = btn.dataset.url;
    var csrfToken = {{ csrf_token() | tojson }};
    btn.disabled = true;
    fetch(url, {
      method: 'POST',
      headers: { 'X-CSRFToken': csrfToken, 'Content-Type': 'application/x-www-form-urlencoded' },
      body: 'csrf_token=' + encodeURIComponent(csrfToken),
    })
    .then(function(res) { return res.json(); })
    .then(function(data) {
      if (data.ok) {
        var li = btn.closest('li');
        li.classList.remove('list-group-item-light', 'border-start', 'border-primary', 'border-3');
        var badge = li.querySelector('.badge.bg-primary');
        if (badge) badge.remove();
        btn.remove();
        var unreadBadge = document.querySelector('.badge.bg-danger');
        if (unreadBadge) {
          var count = parseInt(unreadBadge.textContent) - 1;
          if (count <= 0) {
            unreadBadge.remove();
            var markAllForm = document.querySelector('form[action*="mark-all-read"]');
            if (markAllForm) markAllForm.closest('.col-auto') && markAllForm.remove();
          } else {
            unreadBadge.textContent = count + ' unread';
          }
        }
      }
    })
    .catch(function() { btn.disabled = false; });
  });
});
</script>
{% endblock %}