{% extends "base.html" %}
{% block title %}Dashboard · API Gateway{% endblock %}
{% block content %}
<h1>Dashboard</h1>

<div class="tiles" id="tiles">
  <div class="tile"><div class="label">Requests (24h)</div><div class="value" id="t-total">–</div></div>
  <div class="tile"><div class="label">Error rate (24h)</div><div class="value" id="t-errors">–</div></div>
  <div class="tile"><div class="label">Avg latency (24h)</div><div class="value" id="t-latency">–</div></div>
  <div class="tile"><div class="label">Active services</div><div class="value" id="t-services">–</div></div>
  <div class="tile"><div class="label">Active API keys</div><div class="value" id="t-keys">–</div></div>
</div>

<div class="card">
  <h2>Traffic — last 24 hours</h2>
  <div class="chart-box"><canvas id="chart-traffic"></canvas></div>
</div>

<div class="grid cols-2">
  <div class="card">
    <h2>Requests by service (24h)</h2>
    <div class="chart-box"><canvas id="chart-services"></canvas></div>
  </div>
  <div class="card">
    <h2>Recent requests</h2>
    <table>
      <thead><tr><th>Time (UTC)</th><th>Service</th><th>Path</th><th>Status</th><th>ms</th></tr></thead>
      <tbody>
        {% for log in recent %}
        <tr>
          <td>{{ log.timestamp.strftime("%H:%M:%S") }}</td>
          <td class="strong">{{ log.service.name if log.service else "–" }}</td>
          <td>{{ log.method }} {{ log.path[:40] }}</td>
          <td class="status-{{ log.status_code // 100 }}xx">{{ log.status_code }}</td>
          <td>{{ "%.0f" | format(log.latency_ms) }}</td>
        </tr>
        {% else %}
        <tr><td colspan="5">No traffic yet. Send a request through <code>/gw/&lt;service&gt;/&lt;path&gt;</code>.</td></tr>
        {% endfor %}
      </tbody>
    </table>
  </div>
</div>
{% endblock %}

{% block scripts %}
<script>
(async () => {
  const s = await GW.fetchJSON('/admin/api/stats/summary?hours=24');
  document.getElementById('t-total').textContent = s.total_requests.toLocaleString();
  document.getElementById('t-errors').textContent = s.error_rate + '%';
  document.getElementById('t-latency').innerHTML = s.avg_latency_ms + '<small> ms</small>';
  document.getElementById('t-services').textContent = s.active_services;
  document.getElementById('t-keys').textContent = s.active_keys;

  const ts = await GW.fetchJSON('/admin/api/stats/timeseries?hours=24');
  new Chart(document.getElementById('chart-traffic'), {
    type: 'line',
    data: {
      labels: ts.labels.map(l => l.slice(11)),
      datasets: [
        { label: 'Succeeded', data: ts.ok, borderColor: GW.blue, backgroundColor: GW.blue,
          borderWidth: 2, pointRadius: 0, pointHoverRadius: 4, tension: 0.3 },
        { label: 'Errors (5xx)', data: ts.errors, borderColor: GW.red, backgroundColor: GW.red,
          borderWidth: 2, pointRadius: 0, pointHoverRadius: 4, tension: 0.3 },
      ],
    },
    options: {
      maintainAspectRatio: false,
      interaction: { mode: 'index', intersect: false },
      scales: {
        x: { grid: { display: false }, ticks: { maxTicksLimit: 12 } },
        y: { beginAtZero: true, ticks: { precision: 0 } },
      },
    },
  });

  const bs = await GW.fetchJSON('/admin/api/stats/by-service?hours=24');
  new Chart(document.getElementById('chart-services'), {
    type: 'bar',
    data: {
      labels: bs.labels,
      datasets: [{ label: 'Requests', data: bs.counts, backgroundColor: GW.blue,
                   borderRadius: 4, maxBarThickness: 26 }],
    },
    options: {
      maintainAspectRatio: false,
      indexAxis: 'y',
      plugins: { legend: { display: false } },
      scales: { x: { beginAtZero: true, ticks: { precision: 0 } }, y: { grid: { display: false } } },
    },
  });
})();
</script>
{% endblock %}