{% extends "base.html" %}

{% block content %}
<div id="flash-container" hx-swap-oob="true">
  {% include "fragments/flash.html" %}
</div>

{% if pools.len() == 0 %}
<section class="box">
  <div class="box-title">No pools configured</div>
  <p>Create at least one pool before allocating subnets.</p>
  <a href="/setup" class="btn">Create first pool</a>
  <a href="/pools" class="btn btn-secondary">Manage pools</a>
</section>
{% else %}
<section class="grid">
  {% for pool in pools %}
  <article class="box" id="pool-card-{{ pool.slug }}">
    <div class="box-title">{{ pool.name }}</div>
    <p><span class="label">Parent prefix:</span> <span class="value">{{ pool.cidr }}</span></p>
    <p><span class="label">Type:</span> <span class="value">{{ pool.kind }}</span></p>

    <form
      hx-get="/partials/pools/{{ pool.slug }}/preview"
      hx-target="#preview-{{ pool.slug }}"
      hx-trigger="change from:select, load"
      hx-indicator="#indicator-{{ pool.slug }}"
    >
      <label for="prefix-{{ pool.slug }}">Subnet size</label>
      <select name="prefix_length" id="prefix-{{ pool.slug }}" onchange="updateModalPrefix('{{ pool.slug }}', this.value)">
        {% for pl in pool.allowed_prefixes %}
        <option value="{{ pl }}" {% if pl == "24" %}selected{% endif %}>/{{ pl }}</option>
        {% endfor %}
      </select>
      <div id="indicator-{{ pool.slug }}" class="small" style="display:none;">Loading...</div>
      <div id="preview-{{ pool.slug }}"></div>
    </form>

    <button
      class="btn"
      style="margin-top: 1rem;"
      onclick="openAllocateModal('{{ pool.slug }}')"
    >
      [ Allocate next free subnet ]
    </button>
  </article>
  {% endfor %}
</section>
{% endif %}

<section class="box">
  <div class="box-title">Allocated subnets</div>

  <form method="get" action="/" class="filters">
    <div>
      <label for="q">Search</label>
      <input type="text" id="q" name="q" value="{{ query }}" placeholder="CIDR or note">
    </div>
    <div>
      <label for="pool">Pool</label>
      <select id="pool" name="pool">
        <option value="" {% if pool_filter == "" %}selected{% endif %}>All</option>
        {% for p in all_pools %}
        <option value="{{ p.slug }}" {% if pool_filter == p.slug %}selected{% endif %}>{{ p.name }}</option>
        {% endfor %}
      </select>
    </div>
    <div>
      <label for="status">Status</label>
      <select id="status" name="status">
        <option value="" {% if status_filter == "" %}selected{% endif %}>All</option>
        <option value="active" {% if status_filter == "active" %}selected{% endif %}>active</option>
        <option value="reserved" {% if status_filter == "reserved" %}selected{% endif %}>reserved</option>
        <option value="released" {% if status_filter == "released" %}selected{% endif %}>released</option>
      </select>
    </div>
    <div>
      <button type="submit" class="btn">Filter</button>
      <a href="/" class="btn btn-secondary">Reset</a>
    </div>
  </form>

  <div id="allocations-table">
    {% include "fragments/allocations_table.html" %}
  </div>
</section>

<dialog id="allocate-modal" class="modal-overlay" style="display:none;">
  <div class="modal">
    <h2 class="modal-title">Confirm subnet allocation</h2>
    <form method="post" action="/allocations" class="modal-body" id="allocate-form">
      <input type="hidden" name="pool_slug" id="modal-pool-slug">
      <input type="hidden" name="prefix_length" id="modal-prefix-length">
      <input type="hidden" name="csrf_token" value="{{ csrf_token }}">

      <div class="detail-grid">
        <div class="detail-item">
          <div class="label">Pool</div>
          <div class="value" id="modal-pool-name"></div>
        </div>
        <div class="detail-item">
          <div class="label">Prefix</div>
          <div class="value" id="modal-prefix-display"></div>
        </div>
        <div class="detail-item">
          <div class="label">Proposed subnet</div>
          <div class="value" id="modal-cidr"></div>
        </div>
        <div class="detail-item">
          <div class="label">Total addresses</div>
          <div class="value" id="modal-address-count"></div>
        </div>
        <div class="detail-item">
          <div class="label">Usable hosts</div>
          <div class="value" id="modal-usable-hosts"></div>
        </div>
      </div>

      <p class="small" id="modal-warning"></p>

      <label for="note">Note *</label>
      <textarea id="note" name="note" rows="3" required minlength="3" maxlength="500"></textarea>

      <label for="ticket">Ticket / reference</label>
      <input type="text" id="ticket" name="ticket" maxlength="100">
    </form>
    <div class="modal-actions">
      <button type="button" class="btn btn-secondary" onclick="closeAllocateModal()">Cancel</button>
      <button type="submit" class="btn" form="allocate-form">Confirm allocation</button>
    </div>
  </div>
</dialog>

<script>
  const poolData = {
    {% for pool in pools %}
    "{{ pool.slug }}": {
      name: "{{ pool.name }}",
      allowed_prefixes: {{ pool.allowed_prefixes_json|safe }}
    },
    {% endfor %}
  };

  function updateModalPrefix(slug, prefixLength) {
    // preview is updated via HTMX automatically
  }

  async function openAllocateModal(slug) {
    const select = document.getElementById('prefix-' + slug);
    const prefixLength = select.value;
    const modal = document.getElementById('allocate-modal');

    document.getElementById('modal-pool-slug').value = slug;
    document.getElementById('modal-prefix-length').value = prefixLength;
    document.getElementById('modal-pool-name').textContent = poolData[slug].name;
    document.getElementById('modal-prefix-display').textContent = '/' + prefixLength;

    const resp = await fetch('/partials/pools/' + slug + '/preview?prefix_length=' + prefixLength);
    const html = await resp.text();
    const parser = new DOMParser();
    const doc = parser.parseFromString(html, 'text/html');

    const cidr = doc.getElementById('preview-cidr')?.textContent || '–';
    const addressCount = doc.getElementById('preview-address-count')?.textContent || '–';
    const usableHosts = doc.getElementById('preview-usable-hosts')?.textContent || '–';
    const warning = doc.getElementById('preview-warning')?.textContent || '';

    document.getElementById('modal-cidr').textContent = cidr;
    document.getElementById('modal-address-count').textContent = addressCount;
    document.getElementById('modal-usable-hosts').textContent = usableHosts;
    document.getElementById('modal-warning').textContent = warning;

    modal.style.display = 'flex';
  }

  function closeAllocateModal() {
    document.getElementById('allocate-modal').style.display = 'none';
  }
</script>
{% endblock %}