{% extends "base.html" %}
{% block title %}总览 · {{ app_name }}{% endblock %}
{% block content %}
<h2 style="margin:0 0 14px;display:flex;align-items:center;gap:10px;flex-wrap:wrap">
  总览
  <span id="live-hint" class="tag" style="font-size:12px;font-weight:500">连接中…</span>
</h2>
<div class="grid cols-3">
  <div class="card"><div class="muted">账户</div><div class="stat">{{ accounts|length }}</div></div>
  <div class="card">
    <div class="muted">在线机器</div>
    <div class="stat"><span id="stat-online">{{ online_count }}</span><span class="muted" style="font-size:16px"> / {{ machine_count }}</span></div>
  </div>
  <div class="card"><div class="muted">当前持仓（笔）</div><div class="stat" id="stat-trades">{{ trades|length }}</div></div>
</div>

<div class="grid cols-2" style="margin-top:14px">
  <div class="card">
    <h3>在线机器</h3>
    <table>
      <thead><tr><th>机器</th><th>状态</th><th>最近心跳</th></tr></thead>
      <tbody id="online-machines-body">
        {% for m in online_machines %}
        <tr>
          <td>{{ m.name }} <span class="muted">#{{ m.id }}</span></td>
          <td><span class="tag green">在线</span></td>
          <td class="muted">{{ m.last_seen_fmt }}</td>
        </tr>
        {% else %}
        <tr><td colspan="3" class="muted">当前无在线机器（客户端约每 2 秒心跳）</td></tr>
        {% endfor %}
      </tbody>
    </table>
  </div>
  <div class="card">
    <h3>快速入口</h3>
    <p class="muted">下载通用辅助包并用激活码绑定；本页显示当前持仓，历史成交见交易复盘。</p>
    <p style="margin-top:12px">
      <a class="btn" href="{{ url_for('download_page') }}">下载中心</a>
      <a class="btn secondary" href="{{ url_for('records_page') }}">交易复盘</a>
    </p>
    <p class="muted" style="margin-top:14px">对外地址：{{ public_base }}</p>
  </div>
</div>

<div class="card" style="margin-top:14px">
  <h3>当前持仓</h3>
  <table>
    <thead>
      <tr>
        <th>开仓时间</th><th>机器</th><th>品种</th><th>方向</th><th>手数</th>
        <th>浮盈</th><th>账户</th><th>单号</th><th></th>
      </tr>
    </thead>
    <tbody id="live-trades-body">
      {% for t in trades %}
      <tr>
        <td class="muted">{{ t.time_fmt }}</td>
        <td>{{ t.machine_name or '—' }}</td>
        <td>{{ t.symbol }}</td>
        <td><span class="tag {% if t.side=='buy' %}green{% else %}red{% endif %}">{{ t.side }}</span></td>
        <td>{{ t.volume if t.volume is not none else '—' }}</td>
        <td style="color:{% if t.profit is not none and t.profit>0 %}var(--green){% elif t.profit is not none and t.profit<0 %}var(--red){% else %}inherit{% endif %}">
          {% if t.profit is none %}—{% else %}{{ '%.2f'|format(t.profit) }}{% endif %}
        </td>
        <td>{{ t.account_name or '—' }}</td>
        <td class="muted">{{ t.ticket or '—' }}</td>
        <td><a href="{{ url_for('record_detail', tid=t.id) }}">复盘</a></td>
      </tr>
      {% else %}
      <tr><td colspan="9" class="muted">当前无持仓。开仓后由客户端上报显示。</td></tr>
      {% endfor %}
    </tbody>
  </table>
</div>
{% endblock %}
{% block scripts %}
<script>
(function () {
  var streamUrl = {{ url_for('dashboard_stream')|tojson }};
  var liveUrl = {{ url_for('dashboard_live')|tojson }};
  var detailBase = {{ url_for('record_detail', tid=0)|tojson }}.replace(/0$/, '');
  var hint = document.getElementById('live-hint');
  var mode = 'connecting';
  var pollStarted = false;
  var msgCount = 0;

  function pad(n) { return n < 10 ? '0' + n : String(n); }
  function nowClock() {
    var d = new Date();
    return pad(d.getHours()) + ':' + pad(d.getMinutes()) + ':' + pad(d.getSeconds());
  }

  function setHint(text, kind) {
    if (!hint) return;
    hint.textContent = text;
    hint.className = 'tag' + (kind ? ' ' + kind : '');
  }

  function markUpdated() {
    if (mode === 'sse') {
      setHint('SSE · 更新于 ' + nowClock(), 'green');
    } else if (mode === 'poll') {
      setHint('轮询 1s · 更新于 ' + nowClock(), '');
    }
  }

  function esc(s) {
    return String(s == null ? '' : s)
      .replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;')
      .replace(/"/g, '&quot;');
  }

  function renderMachines(list) {
    var body = document.getElementById('online-machines-body');
    if (!body) return;
    if (!list.length) {
      body.innerHTML = '<tr><td colspan="3" class="muted">当前无在线机器（客户端约每 2 秒心跳）</td></tr>';
      return;
    }
    body.innerHTML = list.map(function (m) {
      return '<tr><td>' + esc(m.name) + ' <span class="muted">#' + esc(m.id) + '</span></td>' +
        '<td><span class="tag green">在线</span></td>' +
        '<td class="muted">' + esc(m.last_seen_fmt || '—') + '</td></tr>';
    }).join('');
  }

  function profitColor(p) {
    if (p == null || p === '') return 'inherit';
    var n = Number(p);
    if (n > 0) return 'var(--green)';
    if (n < 0) return 'var(--red)';
    return 'inherit';
  }

  function renderTrades(list) {
    var body = document.getElementById('live-trades-body');
    if (!body) return;
    document.getElementById('stat-trades').textContent = String(list.length);
    if (!list.length) {
      body.innerHTML = '<tr><td colspan="9" class="muted">当前无持仓。开仓后由客户端上报显示。</td></tr>';
      return;
    }
    body.innerHTML = list.map(function (t) {
      var sideCls = t.side === 'buy' ? 'green' : 'red';
      return '<tr>' +
        '<td class="muted">' + esc(t.time_fmt) + '</td>' +
        '<td>' + esc(t.machine_name || '—') + '</td>' +
        '<td>' + esc(t.symbol) + '</td>' +
        '<td><span class="tag ' + sideCls + '">' + esc(t.side) + '</span></td>' +
        '<td>' + esc(t.volume != null ? t.volume : '—') + '</td>' +
        '<td style="color:' + profitColor(t.profit) + '">' +
          (t.profit == null || t.profit === '' ? '—' : Number(t.profit).toFixed(2)) +
        '</td>' +
        '<td>' + esc(t.account_name || '—') + '</td>' +
        '<td class="muted">' + esc(t.ticket || '—') + '</td>' +
        '<td><a href="' + detailBase + t.id + '">复盘</a></td>' +
        '</tr>';
    }).join('');
  }

  function apply(data) {
    if (!data || !data.ok) return;
    document.getElementById('stat-online').textContent = String(data.online_count);
    renderMachines(data.online_machines || []);
    renderTrades(data.trades || []);
    markUpdated();
  }

  function startPollFallback(reason) {
    if (pollStarted) return;
    pollStarted = true;
    mode = 'poll';
    setHint(reason || '轮询 1s（SSE 不可用）', '');
    setInterval(function () {
      fetch(liveUrl, { credentials: 'same-origin' })
        .then(function (r) { return r.json(); })
        .then(apply)
        .catch(function () { setHint('轮询失败 · 重试中', 'red'); });
    }, 1000);
  }

  if (typeof EventSource === 'undefined') {
    startPollFallback('轮询 1s（浏览器不支持 SSE）');
    return;
  }

  setHint('SSE 连接中…', '');
  var es = new EventSource(streamUrl);
  es.onopen = function () {
    mode = 'sse';
    setHint('SSE 已连接', 'green');
  };
  es.onmessage = function (ev) {
    msgCount += 1;
    mode = 'sse';
    try { apply(JSON.parse(ev.data)); } catch (e) {}
  };
  es.onerror = function () {
    // 已收到过数据则让浏览器自行重连；长时间无数据再降级轮询
    if (msgCount === 0 || es.readyState === EventSource.CLOSED) {
      try { es.close(); } catch (e) {}
      startPollFallback('轮询 1s（SSE 断开）');
    } else {
      setHint('SSE 重连中…', '');
    }
  };
})();
</script>
{% endblock %}