{% extends "admin_base.html" %}
{% set active = 'dlcontrol' %}
{% block admin_content %}
<h1 class="page-title">下载控制</h1>
<p class="muted small">按 IP 限制下载并发，超限的连接自动限速（不会断、下载器不报错）。
注意：同一办公室经 NAT 共用出口 IP 时会被视为一个 IP，并发上限请勿设得过紧。
nginx 另有每 IP 16 连接的硬兜底；限速仅 docker（nginx）部署生效。</p>

{% if saved %}<div class="alert alert-ok">已保存</div>{% endif %}

<div class="panel">
  <h2>全局设置</h2>
  <form method="post" action="/admin/download-control/settings" class="form form-inline">
    <label class="checkbox"><input type="checkbox" name="dl_limit_enabled" value="1"
      {% if s['dl_limit_enabled'] == '1' %}checked{% endif %}> 启用按 IP 并发限速</label>
    <label>每 IP 并发上限
      <input type="number" name="dl_limit_conns" min="1" max="100" value="{{ s['dl_limit_conns'] }}">
    </label>
    <label>超限限速（KB/s）
      <input type="number" name="dl_limit_rate_kbs" min="16" value="{{ (s['dl_limit_rate'] | int) // 1024 }}">
    </label>
    <button class="btn btn-primary" type="submit">保存</button>
  </form>
</div>

<div class="panel">
  <h2>当前活跃下载 <span class="muted small">共 {{ active_downloads|length }} 个 IP（按近 90 秒请求估算，约 1~2 分钟延迟释放）</span>
    <a class="btn btn-sm btn-ghost" href="/admin/download-control" style="float:right">刷新</a>
  </h2>
  <table class="table">
    <thead><tr><th>IP</th><th class="num">并发</th><th>正在下载</th><th class="num">操作</th></tr></thead>
    <tbody>
      {% for a in active_downloads %}
      <tr>
        <td class="mono">{{ a['ip'] }}{% if a['ip'] in blocked %} <span class="badge badge-danger">已拉黑</span>{% endif %}</td>
        <td class="num"><strong>{{ a['conns'] }}</strong></td>
        <td class="small">{{ a['files'] | join('、') }}</td>
        <td class="num">
          <form method="post" action="/admin/download-control/quick-throttle" class="inline"
                onsubmit="return confirm('将 {{ a['ip'] }} 限速为 1 并发 / 256KB/s？')">
            <input type="hidden" name="ip" value="{{ a['ip'] }}">
            <button class="btn btn-sm btn-primary" type="submit">一键限速</button>
          </form>
          {% if a['ip'] not in blocked %}
          <form method="post" action="/admin/download-control/block" class="inline"
                onsubmit="return confirm('把 {{ a['ip'] }} 加入黑名单？该 IP 将无法下载和评论。')">
            <input type="hidden" name="ip" value="{{ a['ip'] }}">
            <button class="btn btn-sm btn-danger" type="submit">拉黑</button>
          </form>
          {% endif %}
        </td>
      </tr>
      {% else %}
      <tr><td colspan="4" class="muted">当前没有活跃下载</td></tr>
      {% endfor %}
    </tbody>
  </table>
</div>

<div class="panel">
  <h2>单 IP 例外规则 <span class="muted small">共 {{ rules|length }} 条；留空表示跟随全局设置</span></h2>
  <form method="post" action="/admin/download-control/rule/add" class="form form-inline">
    <label>IP 地址<input type="text" name="ip" required class="mono" placeholder="192.168.1.66"></label>
    <label>并发上限<input type="number" name="max_conns" min="0" max="100" value="0" title="0 = 跟随全局"></label>
    <label>限速（KB/s）<input type="number" name="rate_kbs" min="0" value="0" title="0 = 跟随全局"></label>
    <label>备注<input type="text" name="note" maxlength="255" placeholder="如：市场部公用机"></label>
    <button class="btn btn-primary" type="submit">保存规则</button>
  </form>
  <table class="table">
    <thead><tr><th>IP</th><th class="num">并发上限</th><th class="num">限速</th><th>备注</th><th class="num">操作</th></tr></thead>
    <tbody>
      {% for r in rules %}
      <tr>
        <td class="mono">{{ r['ip'] }}</td>
        <td class="num">{{ r['max_conns'] or '全局' }}</td>
        <td class="num">{% if r['rate_limit'] %}{{ (r['rate_limit'] | int) // 1024 }} KB/s{% else %}全局{% endif %}</td>
        <td class="small">{{ r['note'] or '—' }}</td>
        <td class="num">
          <form method="post" action="/admin/download-control/rule/{{ r['id'] }}/delete" class="inline"
                onsubmit="return confirm('删除 {{ r['ip'] }} 的例外规则？')">
            <button class="btn btn-sm btn-ghost" type="submit">删除</button>
          </form>
        </td>
      </tr>
      {% else %}
      <tr><td colspan="5" class="muted">暂无例外规则</td></tr>
      {% endfor %}
    </tbody>
  </table>
</div>
{% endblock %}