{% extends "base.html" %}
{% block title %}Inspector – GANDALF{% endblock %}

{% block content %}

<div class="page-header">
  <h1 class="page-title">Network Inspector</h1>
  <p class="page-sub">
    Visual switch chassis diagrams. Click a port to see detailed stats and LLDP path debug.
    <span id="inspector-updated" style="margin-left:10px; color:var(--text-muted); font-size:.85em;"></span>
  </p>
</div>

<div class="inspector-layout">
  <div class="inspector-main" id="inspector-main">
    <div class="link-loading">Loading inspector data</div>
  </div>
  <div class="inspector-panel" id="inspector-panel">
    <div class="inspector-panel-inner" id="inspector-panel-inner"></div>
  </div>
</div>

{% endblock %}

{% block scripts %}
<script>
// ── Switch layout config ─────────────────────────────────────────────────
// keys match the model field returned by the UniFi API
// rows: array of rows, each row is an array of port_idx values
// sfp_ports: port_idx values that are SFP cages (in rows, rendered differently)
// sfp_section: port_idx values rendered as a separate SFP bank below the rows
const SWITCH_LAYOUTS = {
  'USF5P':   { rows: [[1,2,3,4]], sfp_section: [5] },
  'USL8A':   { rows: [[1,2,3,4],[5,6,7,8]], sfp_ports: [1,2,3,4,5,6,7,8] },
  'US24PRO': {
    rows: [
      [1,3,5,7,9,11,13,15,17,19,21,23],
      [2,4,6,8,10,12,14,16,18,20,22,24],
    ],
    sfp_section: [25,26],
  },
  'USPPDUP': { rows: [[1]] },
  'USMINI':  { rows: [[1,2,3,4,5]] },
};

// ── Formatting helpers ───────────────────────────────────────────────────
function fmtSpeed(mbps) {
  if (!mbps) return '–';
  if (mbps >= 1000) return (mbps / 1000).toFixed(0) + 'G';
  return mbps + 'M';
}

function fmtRate(bytesPerSec) {
  if (bytesPerSec === null || bytesPerSec === undefined) return '–';
  const bps = bytesPerSec * 8;
  if (bps < 1e3)  return bps.toFixed(0) + ' bps';
  if (bps < 1e6)  return (bps / 1e3).toFixed(1) + ' Kbps';
  if (bps < 1e9)  return (bps / 1e6).toFixed(2) + ' Mbps';
  return (bps / 1e9).toFixed(3) + ' Gbps';
}

function fmtErrors(rate) {
  if (rate === null || rate === undefined) return '–';
  if (rate < 0.001) return '<span class="val-good">0 /s</span>';
  return `<span class="val-crit">${rate.toFixed(3)} /s</span>`;
}

// ── Build port_idx → port data map ──────────────────────────────────────
function buildPortIdxMap(ports) {
  const map = {};
  for (const [pname, d] of Object.entries(ports)) {
    if (d.port_idx != null) {
      map[d.port_idx] = Object.assign({ name: pname }, d);
    }
  }
  return map;
}

// ── Determine port block CSS state class ────────────────────────────────
function portBlockState(d) {
  if (!d || !d.up) return 'down';
  if (d.is_uplink)  return 'uplink';
  if (d.poe_power != null && d.poe_power > 0) return 'poe-active';
  return 'up';
}

// ── Render a single port block element ──────────────────────────────────
function portBlockHtml(idx, port, swName, sfpBlock) {
  const state = portBlockState(port);
  const label = sfpBlock ? 'SFP' : idx;
  const title = port ? escHtml(port.name) : `Port ${idx}`;
  const sfpCls = sfpBlock ? ' sfp-block' : '';
  return `<div class="switch-port-block ${state}${sfpCls}"
    data-switch="${escHtml(swName)}" data-port-idx="${idx}"
    title="${title}"
    onclick="selectPort(this)">${label}</div>`;
}

// ── Render one switch chassis ────────────────────────────────────────────
function renderChassis(swName, sw) {
  const model   = sw.model || '';
  const layout  = SWITCH_LAYOUTS[model] || null;
  const portMap = buildPortIdxMap(sw.ports || {});

  const upCount   = Object.values(sw.ports || {}).filter(p => p.up).length;
  const totCount  = Object.keys(sw.ports || {}).length;
  const downCount = totCount - upCount;
  const meta = [model, `${upCount}/${totCount} up`, downCount ? `${downCount} down` : ''].filter(Boolean).join(' · ');

  let chassisHtml = '';

  if (layout) {
    const sfpPortSet = new Set(layout.sfp_ports || []);
    const sfpSectionSet = new Set(layout.sfp_section || []);

    // Main port rows
    chassisHtml += '<div class="chassis-rows">';
    for (const row of layout.rows) {
      chassisHtml += '<div class="chassis-row">';
      for (const idx of row) {
        const port   = portMap[idx];
        const isSfp  = sfpPortSet.has(idx);
        const sfpCls = isSfp ? ' sfp-port' : '';
        const state  = portBlockState(port);
        const title  = port ? escHtml(port.name) : `Port ${idx}`;
        chassisHtml += `<div class="switch-port-block ${state}${sfpCls}"
          data-switch="${escHtml(swName)}" data-port-idx="${idx}"
          title="${title}"
          onclick="selectPort(this)">${idx}</div>`;
      }
      chassisHtml += '</div>';
    }
    chassisHtml += '</div>';

    // Separate SFP section (if present)
    if (sfpSectionSet.size) {
      chassisHtml += '<div class="chassis-sfp-section">';
      for (const idx of layout.sfp_section) {
        chassisHtml += portBlockHtml(idx, portMap[idx], swName, true);
      }
      chassisHtml += '</div>';
    }
  } else {
    // Fallback: render all ports sorted by idx
    const allPorts = Object.entries(sw.ports || {})
      .sort(([, a], [, b]) => (a.port_idx || 0) - (b.port_idx || 0));
    chassisHtml += '<div class="chassis-rows"><div class="chassis-row">';
    for (const [pname, d] of allPorts) {
      chassisHtml += portBlockHtml(d.port_idx || 0, Object.assign({ name: pname }, d), swName, false);
    }
    chassisHtml += '</div></div>';
  }

  return `
    <div class="inspector-chassis" id="chassis-${escHtml(swName)}">
      <div class="chassis-header">
        <span class="chassis-name">${escHtml(swName)}</span>
        ${sw.ip ? `<span class="chassis-ip">${escHtml(sw.ip)}</span>` : ''}
        <span class="chassis-meta">${escHtml(meta)}</span>
      </div>
      <div class="chassis-body">${chassisHtml}</div>
    </div>`;
}

// ── State ────────────────────────────────────────────────────────────────
let _selectedSwitch = null;
let _selectedIdx    = null;
let _apiData        = null;

// ── Port selection ───────────────────────────────────────────────────────
function selectPort(el) {
  const swName = el.dataset.switch;
  const idx    = parseInt(el.dataset.portIdx, 10);
  document.querySelectorAll('.switch-port-block.selected')
    .forEach(e => e.classList.remove('selected'));
  el.classList.add('selected');
  _selectedSwitch = swName;
  _selectedIdx    = idx;
  renderPanel(swName, idx);
}

function closePanel() {
  document.getElementById('inspector-panel').classList.remove('open');
  document.querySelectorAll('.switch-port-block.selected')
    .forEach(el => el.classList.remove('selected'));
  _selectedSwitch = null;
  _selectedIdx    = null;
}

// ── Render detail panel ──────────────────────────────────────────────────
function renderPanel(swName, idx) {
  if (!_apiData) return;
  const sw = _apiData.unifi_switches && _apiData.unifi_switches[swName];
  if (!sw) return;
  const portMap = buildPortIdxMap(sw.ports || {});
  const d = portMap[idx];
  if (!d) return;

  const upStr    = d.up ? '<span class="val-good">UP</span>' : '<span class="val-crit">DOWN</span>';
  const speedStr = d.speed_mbps ? `<span class="val-cyan">${fmtSpeed(d.speed_mbps)}bps</span>` : '–';
  const duplexCls = d.full_duplex ? 'val-good' : (d.up ? 'val-warn' : 'val-neutral');
  const duplexStr = d.up ? `<span class="${duplexCls}">${d.full_duplex ? 'Full' : 'Half'}</span>` : '–';
  const autoneg  = d.autoneg ? 'On' : 'Off';
  const mediaStr = d.media || '–';
  const isUplinkBadge = d.is_uplink ? ' <span class="port-badge port-badge-uplink">UPLINK</span>' : '';

  // PoE section
  let poeHtml = '';
  if (d.poe_class != null) {
    const poeMaxStr = d.poe_max_power != null ? ` / max ${d.poe_max_power.toFixed(1)}W` : '';
    const poeCurStr = (d.poe_power != null && d.poe_power > 0) ? ` / draw <span class="val-amber">${d.poe_power.toFixed(1)}W</span>` : '';
    poeHtml = `
      <div class="panel-section-title">PoE</div>
      <div class="panel-row"><span class="panel-label">Class</span><span class="panel-val">class ${d.poe_class}${poeMaxStr}</span></div>
      ${d.poe_power != null ? `<div class="panel-row"><span class="panel-label">Draw</span><span class="panel-val">${d.poe_power > 0 ? `<span class="val-amber">${d.poe_power.toFixed(1)}W</span>` : '0W'}</span></div>` : ''}
      ${d.poe_mode ? `<div class="panel-row"><span class="panel-label">Mode</span><span class="panel-val">${escHtml(d.poe_mode)}</span></div>` : ''}`;
  }

  // Traffic section
  let trafficHtml = '';
  if (d.tx_bytes_rate != null || d.rx_bytes_rate != null) {
    trafficHtml = `
      <div class="panel-section-title">Traffic</div>
      <div class="panel-row"><span class="panel-label">TX</span><span class="panel-val">${fmtRate(d.tx_bytes_rate)}</span></div>
      <div class="panel-row"><span class="panel-label">RX</span><span class="panel-val">${fmtRate(d.rx_bytes_rate)}</span></div>`;
  }

  // Errors / drops section
  let errHtml = '';
  if (d.tx_errs_rate != null || d.rx_errs_rate != null) {
    errHtml = `
      <div class="panel-section-title">Errors / Drops</div>
      <div class="panel-row"><span class="panel-label">TX Err</span><span class="panel-val">${fmtErrors(d.tx_errs_rate)}</span></div>
      <div class="panel-row"><span class="panel-label">RX Err</span><span class="panel-val">${fmtErrors(d.rx_errs_rate)}</span></div>
      <div class="panel-row"><span class="panel-label">TX Drop</span><span class="panel-val">${fmtErrors(d.tx_drops_rate)}</span></div>
      <div class="panel-row"><span class="panel-label">RX Drop</span><span class="panel-val">${fmtErrors(d.rx_drops_rate)}</span></div>`;
  }

  // LLDP + path debug
  let lldpHtml = '';
  let pathHtml = '';
  if (d.lldp && d.lldp.system_name) {
    const l = d.lldp;
    lldpHtml = `
      <div class="panel-section-title">LLDP Neighbor</div>
      <div class="panel-row"><span class="panel-label">System</span><span class="panel-val val-cyan">${escHtml(l.system_name)}</span></div>
      ${l.port_id  ? `<div class="panel-row"><span class="panel-label">Port</span><span class="panel-val">${escHtml(l.port_id)}</span></div>` : ''}
      ${l.port_desc ? `<div class="panel-row"><span class="panel-label">Port Desc</span><span class="panel-val">${escHtml(l.port_desc)}</span></div>` : ''}
      ${l.chassis_id ? `<div class="panel-row"><span class="panel-label">Chassis</span><span class="panel-val">${escHtml(l.chassis_id)}</span></div>` : ''}
      ${l.mgmt_ips && l.mgmt_ips.length ? `<div class="panel-row"><span class="panel-label">Mgmt IP</span><span class="panel-val">${escHtml(l.mgmt_ips.join(', '))}</span></div>` : ''}`;

    // Path debug: look for matching server interface
    const hosts = _apiData.hosts || {};
    const serverIfaces = hosts[l.system_name];
    if (serverIfaces) {
      let matchedIface = l.port_id && serverIfaces[l.port_id] ? l.port_id : null;
      if (!matchedIface && l.port_id) {
        // fuzzy match
        matchedIface = Object.keys(serverIfaces).find(k => l.port_id.includes(k) || k.includes(l.port_id)) || null;
      }
      if (matchedIface) {
        pathHtml = buildPathDebug(swName, d, l.system_name, matchedIface, serverIfaces[matchedIface]);
      }
    }
  }

  // Diagnose button (only when LLDP has an identified neighbor we can map)
  const hasDiagTarget = !!(d.lldp && d.lldp.system_name &&
    _apiData.hosts && _apiData.hosts[d.lldp.system_name]);
  const diagHtml = hasDiagTarget ? `
    <div class="diag-bar">
      <button class="btn-diag" onclick="runDiagnostic('${escHtml(swName)}', ${idx})">Run Link Diagnostics</button>
      <span class="diag-status" id="diag-status"></span>
    </div>
    <div class="diag-results" id="diag-results"></div>` : '';

  const inner = document.getElementById('inspector-panel-inner');
  inner.innerHTML = `
    <div class="panel-header">
      <div>
        <span class="panel-port-name">${escHtml(d.name)}</span>${isUplinkBadge}
        <div class="panel-meta">${escHtml(swName)} · port #${idx}</div>
      </div>
      <button class="panel-close" onclick="closePanel()">✕</button>
    </div>

    <div class="panel-section-title">Link</div>
    <div class="panel-row"><span class="panel-label">Status</span><span class="panel-val">${upStr}</span></div>
    <div class="panel-row"><span class="panel-label">Speed</span><span class="panel-val">${speedStr}</span></div>
    <div class="panel-row"><span class="panel-label">Duplex</span><span class="panel-val">${duplexStr}</span></div>
    <div class="panel-row"><span class="panel-label">Auto-neg</span><span class="panel-val val-neutral">${autoneg}</span></div>
    <div class="panel-row"><span class="panel-label">Media</span><span class="panel-val">${escHtml(mediaStr)}</span></div>

    ${poeHtml}
    ${trafficHtml}
    ${errHtml}
    ${lldpHtml}
    ${pathHtml}
    ${diagHtml}
  `;

  document.getElementById('inspector-panel').classList.add('open');
}

// ── Build path debug two-column section ─────────────────────────────────
function buildPathDebug(swName, swPort, serverName, ifaceName, svrData) {
  const isFiber = (swPort.media || '').toLowerCase().includes('sfp') ||
                  (svrData.port_type || '').toLowerCase().includes('fibre') ||
                  (svrData.port_type || '').toLowerCase().includes('fiber') ||
                  !!svrData.sfp;
  const connType = isFiber ? 'SFP / Fiber' : 'Copper';

  let sfpDomHtml = '';
  if (svrData.sfp && Object.keys(svrData.sfp).length) {
    const sfp = svrData.sfp;
    sfpDomHtml = '<div class="path-dom">';
    if (sfp.vendor)        sfpDomHtml += `<div class="path-dom-row"><span>Vendor</span><span>${escHtml(sfp.vendor)}${sfp.part_no ? ' / ' + escHtml(sfp.part_no) : ''}</span></div>`;
    if (sfp.temp_c != null) sfpDomHtml += `<div class="path-dom-row"><span>Temp</span><span>${sfp.temp_c.toFixed(1)}°C</span></div>`;
    if (sfp.tx_power_dbm != null) sfpDomHtml += `<div class="path-dom-row"><span>TX</span><span>${sfp.tx_power_dbm.toFixed(2)} dBm</span></div>`;
    if (sfp.rx_power_dbm != null) sfpDomHtml += `<div class="path-dom-row"><span>RX</span><span>${sfp.rx_power_dbm.toFixed(2)} dBm</span></div>`;
    sfpDomHtml += '</div>';
  }

  const svrErrTx = (svrData.tx_errs_rate > 0.001) ? 'val-crit' : 'val-good';
  const svrErrRx = (svrData.rx_errs_rate > 0.001) ? 'val-crit' : 'val-good';
  const swErrTx  = (swPort.tx_errs_rate  > 0.001) ? 'val-crit' : 'val-good';
  const swErrRx  = (swPort.rx_errs_rate  > 0.001) ? 'val-crit' : 'val-good';

  return `
    <div class="panel-section-title">Path Debug <span class="path-conn-type">${escHtml(connType)}</span></div>
    <div class="path-debug-cols">
      <div class="path-col">
        <div class="path-col-header">Switch</div>
        <div class="path-row"><span>Port</span><span>${escHtml(swPort.name)}</span></div>
        <div class="path-row"><span>Speed</span><span>${fmtSpeed(swPort.speed_mbps)}bps</span></div>
        <div class="path-row"><span>TX</span><span>${fmtRate(swPort.tx_bytes_rate)}</span></div>
        <div class="path-row"><span>RX</span><span>${fmtRate(swPort.rx_bytes_rate)}</span></div>
        <div class="path-row"><span>TX Err</span><span class="${swErrTx}">${fmtErrors(swPort.tx_errs_rate)}</span></div>
        <div class="path-row"><span>RX Err</span><span class="${swErrRx}">${fmtErrors(swPort.rx_errs_rate)}</span></div>
        ${(swPort.poe_power != null && swPort.poe_power > 0) ? `<div class="path-row"><span>PoE</span><span class="val-amber">${swPort.poe_power.toFixed(1)}W</span></div>` : ''}
      </div>
      <div class="path-col">
        <div class="path-col-header">Server: ${escHtml(serverName)}</div>
        <div class="path-row"><span>Iface</span><span>${escHtml(ifaceName)}</span></div>
        <div class="path-row"><span>Speed</span><span>${svrData.speed_mbps ? fmtSpeed(svrData.speed_mbps) + 'bps' : '–'}</span></div>
        <div class="path-row"><span>TX</span><span>${fmtRate(svrData.tx_bytes_rate)}</span></div>
        <div class="path-row"><span>RX</span><span>${fmtRate(svrData.rx_bytes_rate)}</span></div>
        <div class="path-row"><span>TX Err</span><span class="${svrErrTx}">${fmtErrors(svrData.tx_errs_rate)}</span></div>
        <div class="path-row"><span>RX Err</span><span class="${svrErrRx}">${fmtErrors(svrData.rx_errs_rate)}</span></div>
        ${sfpDomHtml}
      </div>
    </div>`;
}

// ── Render all switches ──────────────────────────────────────────────────
function renderInspector(data) {
  _apiData = data;
  const main = document.getElementById('inspector-main');
  const switches = data.unifi_switches || {};

  const upd = data.updated ? `Updated: ${data.updated}` : '';
  const updEl = document.getElementById('inspector-updated');
  if (updEl) updEl.textContent = upd;

  if (!Object.keys(switches).length) {
    main.innerHTML = '<p class="empty-state">No switch data available. Monitor may still be initialising.</p>';
    return;
  }

  main.innerHTML = Object.entries(switches)
    .map(([swName, sw]) => renderChassis(swName, sw))
    .join('');

  // Re-apply selection highlight after re-render (dataset compare — no CSS escaping)
  if (_selectedSwitch && _selectedIdx !== null) {
    const block = Array.from(document.querySelectorAll('.switch-port-block')).find(
      el => el.dataset.switch === _selectedSwitch && parseInt(el.dataset.portIdx, 10) === _selectedIdx
    );
    if (block) {
      block.classList.add('selected');
      renderPanel(_selectedSwitch, _selectedIdx);
    }
  }
}

// ── Fetch and render ─────────────────────────────────────────────────────
async function loadInspector() {
  try {
    const resp = await fetch('/api/links');
    if (!resp.ok) throw new Error('API error');
    const data = await resp.json();
    renderInspector(data);
  } catch (e) {
    document.getElementById('inspector-main').innerHTML =
      '<p class="empty-state">Failed to load inspector data.</p>';
  }
}

loadInspector();
setInterval(loadInspector, 60000);

// ── Link Diagnostics ─────────────────────────────────────────────────
let _diagPollTimer = null;

function runDiagnostic(swName, portIdx) {
  const statusEl = document.getElementById('diag-status');
  const resultsEl = document.getElementById('diag-results');
  if (!statusEl || !resultsEl) return;

  // Clear any previous poll
  if (_diagPollTimer) { clearInterval(_diagPollTimer); _diagPollTimer = null; }

  statusEl.textContent = 'Submitting to Pulse...';
  resultsEl.innerHTML = '';

  fetch('/api/diagnose', {
    method: 'POST',
    headers: {'Content-Type': 'application/json'},
    body: JSON.stringify({switch_name: swName, port_idx: portIdx}),
  })
  .then(r => r.json())
  .then(resp => {
    if (resp.error) {
      statusEl.textContent = 'Error: ' + resp.error;
      return;
    }
    statusEl.textContent = 'Collecting diagnostics via Pulse...';
    pollDiagnostic(resp.job_id, statusEl, resultsEl);
  })
  .catch(e => {
    statusEl.textContent = 'Request failed: ' + e;
  });
}

function pollDiagnostic(jobId, statusEl, resultsEl) {
  let attempts = 0;
  _diagPollTimer = setInterval(() => {
    attempts++;
    if (attempts > 120) {  // 2min timeout
      clearInterval(_diagPollTimer);
      statusEl.textContent = 'Timed out waiting for results.';
      return;
    }
    fetch(`/api/diagnose/${jobId}`)
    .then(r => r.json())
    .then(resp => {
      if (resp.status === 'done') {
        clearInterval(_diagPollTimer);
        _diagPollTimer = null;
        statusEl.textContent = '';
        renderDiagnosticResults(resp.result, resultsEl);
      }
    })
    .catch(() => {
      clearInterval(_diagPollTimer);
      _diagPollTimer = null;
      statusEl.textContent = 'Error: lost connection while collecting diagnostics.';
    });
  }, 2000);
}

function renderDiagnosticResults(d, container) {
  if (!d || d.status === 'error') {
    container.innerHTML = `<div class="diag-error">Diagnostic error: ${escHtml((d && d.error) || 'unknown')}</div>`;
    return;
  }

  const health  = d.health || {};
  const issues  = health.issues  || [];
  const warns   = health.warnings || [];
  const infoArr = health.info    || [];
  const secs    = d.sections     || {};
  const eth     = secs.ethtool   || {};
  const drv     = secs.ethtool_driver || {};
  const pause   = secs.ethtool_pause  || {};
  const ring    = secs.ethtool_ring   || {};
  const dom     = secs.ethtool_dom    || {};
  const sysfs   = secs.sysfs_stats    || {};
  const dmesg   = secs.dmesg          || [];
  const lldpctl = secs.lldpctl        || {};
  const nicStats = secs.ethtool_stats || {};
  const swPort  = d.switch_port       || {};

  // ── Health banner ──
  let bannerHtml = '';
  if (issues.length === 0 && warns.length === 0) {
    bannerHtml = '<div class="diag-health-banner"><span class="diag-health-ok">ALL OK</span></div>';
  } else {
    const parts = [];
    if (issues.length) parts.push(`<span class="diag-health-critical">${issues.length} CRITICAL</span>`);
    if (warns.length)  parts.push(`<span class="diag-health-warning">${warns.length} WARNING</span>`);
    bannerHtml = `<div class="diag-health-banner">${parts.join(' ')}</div>`;
  }

  const issueRows = [...issues, ...warns, ...infoArr].map(item => {
    const cls = issues.includes(item) ? 'diag-val-bad' : warns.includes(item) ? 'diag-val-warn' : 'diag-val-good';
    const label = issues.includes(item) ? 'CRIT' : warns.includes(item) ? 'WARN' : 'INFO';
    return `<div class="diag-issue-row"><span class="${cls}">[${label}]</span> <span class="diag-code">${escHtml(item.code)}</span> — ${escHtml(item.message)}</div>`;
  }).join('');

  // ── Physical layer ──
  const carrierVal = secs.carrier === '1' ? '<span class="diag-val-good">YES</span>' :
                     secs.carrier === '0' ? '<span class="diag-val-bad">NO</span>' : '–';
  const operstateVal = (secs.operstate || '?').toUpperCase();
  const opstateCls = secs.operstate === 'up' ? 'diag-val-good' : secs.operstate === 'down' ? 'diag-val-bad' : 'diag-val-warn';
  const speedVal = eth.speed_mbps ? `<span class="diag-val-good">${fmtSpeed(eth.speed_mbps)}bps</span>` : '<span class="diag-val-warn">–</span>';
  const duplexVal = eth.duplex === 'full' ? '<span class="diag-val-good">Full</span>' :
                    eth.duplex === 'half' ? '<span class="diag-val-bad">Half</span>' : '–';
  const linkDetVal = eth.link_detected === true  ? '<span class="diag-val-good">Yes</span>' :
                     eth.link_detected === false ? '<span class="diag-val-bad">No</span>' : '–';
  const autonegVal = eth.auto_neg === true  ? '<span class="diag-val-good">On</span>' :
                     eth.auto_neg === false ? '<span class="diag-val-warn">Off</span>' : '–';

  const physHtml = `
    <div class="diag-section">
      <div class="diag-section-header">Physical Layer</div>
      <table class="diag-table">
        <tr><td>Carrier</td><td>${carrierVal}</td></tr>
        <tr><td>Oper State</td><td><span class="${opstateCls}">${escHtml(operstateVal)}</span></td></tr>
        <tr><td>Speed</td><td>${speedVal}</td></tr>
        <tr><td>Duplex</td><td>${duplexVal}</td></tr>
        <tr><td>Link Detected</td><td>${linkDetVal}</td></tr>
        <tr><td>Auto-neg</td><td>${autonegVal}</td></tr>
        ${secs.carrier_changes != null ? `<tr><td>Carrier Changes</td><td><span class="${secs.carrier_changes > 20 ? 'diag-val-warn' : 'diag-val-good'}">${secs.carrier_changes}</span></td></tr>` : ''}
      </table>
    </div>`;

  // ── SFP / DOM ──
  let domHtml = '';
  if (dom && Object.keys(dom).length > 0) {
    const rxBar  = dom.rx_power_dbm != null ? renderPowerBar(dom.rx_power_dbm, -18, -25) : '';
    const txBar  = dom.tx_power_dbm != null ? renderPowerBar(dom.tx_power_dbm, -10, -13) : '';
    domHtml = `
      <div class="diag-section">
        <div class="diag-section-header">SFP / DOM</div>
        <table class="diag-table">
          ${dom.vendor   ? `<tr><td>Vendor</td><td>${escHtml(dom.vendor)}${dom.part_no ? ' / ' + escHtml(dom.part_no) : ''}</td></tr>` : ''}
          ${dom.sfp_type ? `<tr><td>Type</td><td>${escHtml(dom.sfp_type)}</td></tr>` : ''}
          ${dom.connector ? `<tr><td>Connector</td><td>${escHtml(dom.connector)}</td></tr>` : ''}
          ${dom.wavelength_nm != null ? `<tr><td>Wavelength</td><td>${dom.wavelength_nm} nm</td></tr>` : ''}
          ${dom.temp_c    != null ? `<tr><td>Temperature</td><td>${dom.temp_c.toFixed(1)} °C</td></tr>` : ''}
          ${dom.voltage_v != null ? `<tr><td>Voltage</td><td>${dom.voltage_v.toFixed(4)} V</td></tr>` : ''}
          ${dom.bias_ma   != null ? `<tr><td>Bias Current</td><td>${dom.bias_ma.toFixed(3)} mA</td></tr>` : ''}
          ${dom.tx_power_dbm != null ? `<tr><td>TX Power</td><td>${dom.tx_power_dbm.toFixed(2)} dBm ${txBar}</td></tr>` : ''}
          ${dom.rx_power_dbm != null ? `<tr><td>RX Power</td><td>${dom.rx_power_dbm.toFixed(2)} dBm ${rxBar}</td></tr>` : ''}
        </table>
      </div>`;
  }

  // ── NIC Error Counters ──
  const errCounters = ['rx_crc_errors','rx_frame_errors','collisions','tx_carrier_errors','rx_missed_errors','rx_fifo_errors'];
  const nonZeroCounters = errCounters.filter(k => sysfs[k] > 0);
  let errCounterHtml = '';
  if (nonZeroCounters.length > 0 || secs.carrier_changes > 0) {
    const rows = nonZeroCounters.map(k => {
      const v = sysfs[k];
      const cls = v > 100 ? 'diag-val-bad' : 'diag-val-warn';
      return `<tr><td>${escHtml(k)}</td><td class="${cls}">${v.toLocaleString()}</td></tr>`;
    }).join('');
    errCounterHtml = `
      <div class="diag-section">
        <div class="diag-section-header">NIC Error Counters</div>
        <table class="diag-table">
          ${rows || '<tr><td colspan="2" class="diag-val-good">All zero</td></tr>'}
        </table>
      </div>`;
  }

  // ── ethtool -S (collapsible) ──
  let nicStatHtml = '';
  if (Object.keys(nicStats).length > 0) {
    const _ERR_KEYS = /err|drop|miss|crc|frame|fifo|abort|carrier|collision|fault|discard|overflow|reset/i;
    const rows = Object.entries(nicStats).map(([k, v]) => {
      const cls = _ERR_KEYS.test(k) && v > 0 ? ' class="diag-stat-nonzero-warn"' : '';
      return `<tr${cls}><td>${escHtml(k)}</td><td>${v.toLocaleString()}</td></tr>`;
    }).join('');
    nicStatHtml = `
      <div class="diag-section diag-collapsible">
        <div class="diag-section-header diag-toggle" onclick="this.parentElement.classList.toggle('diag-open')">
          ethtool -S (NIC stats) <span class="diag-toggle-hint">[expand]</span>
        </div>
        <div class="diag-section-body">
          <table class="diag-stat-table">${rows}</table>
        </div>
      </div>`;
  }

  // ── Flow Control + Ring Buffers ──
  let flowRingHtml = '';
  const hasPause = Object.keys(pause).length > 0;
  const hasRing  = Object.keys(ring).length > 0;
  if (hasPause || hasRing) {
    flowRingHtml = `
      <div class="diag-section">
        <div class="diag-section-header">Flow Control &amp; Ring Buffers</div>
        <table class="diag-table">
          ${hasPause ? `
          <tr><td>RX Pause</td><td>${pause.rx_pause ? '<span class="diag-val-good">On</span>' : 'Off'}</td></tr>
          <tr><td>TX Pause</td><td>${pause.tx_pause ? '<span class="diag-val-good">On</span>' : 'Off'}</td></tr>` : ''}
          ${hasRing ? `
          <tr><td>RX Ring</td><td>${ring.rx_current != null ? ring.rx_current : '–'} / ${ring.rx_max != null ? ring.rx_max : '–'} max</td></tr>
          <tr><td>TX Ring</td><td>${ring.tx_current != null ? ring.tx_current : '–'} / ${ring.tx_max != null ? ring.tx_max : '–'} max</td></tr>` : ''}
        </table>
      </div>`;
  }

  // ── Driver Info ──
  let drvHtml = '';
  if (Object.keys(drv).length > 0) {
    drvHtml = `
      <div class="diag-section">
        <div class="diag-section-header">Driver Info</div>
        <table class="diag-table">
          ${drv.driver   ? `<tr><td>Driver</td><td>${escHtml(drv.driver)}</td></tr>` : ''}
          ${drv.version  ? `<tr><td>Version</td><td>${escHtml(drv.version)}</td></tr>` : ''}
          ${drv.firmware_version ? `<tr><td>Firmware</td><td>${escHtml(drv.firmware_version)}</td></tr>` : ''}
          ${drv.bus_info ? `<tr><td>Bus</td><td>${escHtml(drv.bus_info)}</td></tr>` : ''}
        </table>
      </div>`;
  }

  // ── LLDP Validation ──
  let lldpValHtml = '';
  const swLldp = swPort.lldp || {};
  lldpValHtml = `
    <div class="diag-section">
      <div class="diag-section-header">LLDP Validation</div>
      <div class="path-debug-cols">
        <div class="path-col">
          <div class="path-col-header">Switch sees</div>
          <div class="path-row"><span>System</span><span>${escHtml(swLldp.system_name || '–')}</span></div>
          <div class="path-row"><span>Port</span><span>${escHtml(swLldp.port_id || '–')}</span></div>
          <div class="path-row"><span>Chassis</span><span>${escHtml(swLldp.chassis_id || '–')}</span></div>
        </div>
        <div class="path-col">
          <div class="path-col-header">Server lldpctl</div>
          ${lldpctl.available
            ? `<div class="path-row"><span>Neighbor</span><span>${escHtml(lldpctl.neighbor_system || '–')}</span></div>
               <div class="path-row"><span>Port</span><span>${escHtml(lldpctl.neighbor_port || '–')}</span></div>`
            : '<div class="path-row"><span class="diag-val-warn">lldpd not running</span></div>'}
        </div>
      </div>
    </div>`;

  // ── dmesg ──
  let dmesgHtml = '';
  if (dmesg.length > 0) {
    const dlines = dmesg.map(e => {
      const cls = e.severity === 'error' ? ' diag-dmesg-err' : e.severity === 'warn' ? ' diag-dmesg-warn' : '';
      const ts = e.timestamp ? `[${e.timestamp}] ` : '';
      return `<div class="diag-dmesg-line${cls}">${escHtml(ts + e.msg)}</div>`;
    }).join('');
    dmesgHtml = `
      <div class="diag-section diag-collapsible">
        <div class="diag-section-header diag-toggle" onclick="this.parentElement.classList.toggle('diag-open')">
          Kernel Events (dmesg) <span class="diag-toggle-hint">[expand]</span>
        </div>
        <div class="diag-section-body">
          <div class="diag-dmesg-wrap">${dlines}</div>
        </div>
      </div>`;
  }

  // ── Switch Port Summary ──
  const swSummaryHtml = `
    <div class="diag-section">
      <div class="diag-section-header">Switch Port Summary</div>
      <table class="diag-table">
        <tr><td>Status</td><td>${swPort.up ? '<span class="diag-val-good">UP</span>' : '<span class="diag-val-bad">DOWN</span>'}</td></tr>
        <tr><td>Speed</td><td>${swPort.speed_mbps ? fmtSpeed(swPort.speed_mbps) + 'bps' : '–'}</td></tr>
        <tr><td>Duplex</td><td>${swPort.full_duplex ? 'Full' : (swPort.up ? '<span class="diag-val-bad">Half</span>' : '–')}</td></tr>
        <tr><td>TX Err</td><td>${fmtErrors(swPort.tx_errs_rate)}</td></tr>
        <tr><td>RX Err</td><td>${fmtErrors(swPort.rx_errs_rate)}</td></tr>
        ${swPort.poe_power != null ? `<tr><td>PoE</td><td><span class="val-amber">${swPort.poe_power.toFixed(1)}W</span></td></tr>` : ''}
      </table>
    </div>`;

  // ── Pulse link ──
  const pulseLink = d.pulse_url
    ? `<div class="diag-pulse-link"><a href="${escHtml(d.pulse_url)}" target="_blank" rel="noopener">View raw output in Pulse ↗</a></div>`
    : '';

  container.innerHTML = `
    <div class="diag-results-inner">
      ${bannerHtml}
      <div class="diag-issue-list">${issueRows}</div>
      ${physHtml}
      ${domHtml}
      ${errCounterHtml}
      ${nicStatHtml}
      ${flowRingHtml}
      ${drvHtml}
      ${lldpValHtml}
      ${dmesgHtml}
      ${swSummaryHtml}
      ${pulseLink}
    </div>`;
}

// SFP power bar: range is 0 dBm (best) to -35 dBm (worst)
function renderPowerBar(dbm, warnThreshold, critThreshold) {
  const minDbm = -35, maxDbm = 0;
  const pct = Math.max(0, Math.min(100, ((dbm - minDbm) / (maxDbm - minDbm)) * 100));
  const warnPct = ((warnThreshold - minDbm) / (maxDbm - minDbm)) * 100;
  const critPct  = ((critThreshold  - minDbm) / (maxDbm - minDbm)) * 100;
  const barCls = dbm < critThreshold ? 'diag-val-bad' : dbm < warnThreshold ? 'diag-val-warn' : 'diag-val-good';
  return `<span class="diag-power-bar-wrap">
    <span class="diag-power-bar ${barCls}" style="width:${pct.toFixed(1)}%"></span>
    <span class="diag-power-zone-warn" style="left:${warnPct.toFixed(1)}%"></span>
    <span class="diag-power-zone-crit" style="left:${critPct.toFixed(1)}%"></span>
  </span>`;
}
</script>
{% endblock %}