'use strict';
/* global DEVICE_NAME, deviceUrl, refreshModem, _toIso, fmtRate, fmtErrors, renderPortInspector, selectPortByIdx, highlightSelectedPort */

// Per-device page: overview, alerts, and a compact interface/port table. Host
// rows expand in place; switch and router rows open the port inspector panel.

const esc = s => lt.escHtml(String(s === null || s === undefined ? '' : s));

const _openRows = new Set();  // survives auto-refresh
let _filter = 'all';
let _query  = '';
let _device = null;

// ── Formatting ───────────────────────────────────────────────────────
function fmtSpeed(mbps) {
  if (!mbps) return '–';
  return mbps >= 1000 ? (mbps / 1000).toFixed(0) + ' Gbps' : mbps + ' Mbps';
}

function fmtUnit(value, unit, digits) {
  return value === null || value === undefined ? '–' : `${value.toFixed(digits)} ${unit}`;
}

function fmtUptime(seconds) {
  if (seconds === null || seconds === undefined) return '–';
  const d = Math.floor(seconds / 86400), h = Math.floor((seconds % 86400) / 3600);
  const m = Math.floor((seconds % 3600) / 60);
  return d ? `${d}d ${h}h` : `${h}h ${m}m`;
}

function ratePct(bytesPerSec, mbps) {
  if (!mbps || !bytesPerSec) return 0;
  return Math.min(100, (bytesPerSec * 8 / 1e6 / mbps) * 100);
}

function barClass(pct, isTx) {
  if (pct > 85) return 'lt-progress--red';
  if (pct > 65) return 'lt-progress--amber';
  return isTx ? '' : 'lt-progress--cyan';
}

// ── SFP/DOM value classification ─────────────────────────────────────
function rxClass(dbm) {
  if (dbm === null || dbm === undefined) return 'val-neutral';
  if (dbm < -15) return 'val-crit';
  return dbm < -10 ? 'val-warn' : 'val-good';
}
function txClass(dbm) {
  if (dbm === null || dbm === undefined) return 'val-neutral';
  return dbm < -5 ? 'val-crit' : 'val-good';
}
function tempClass(c) {
  if (c === null || c === undefined) return 'val-neutral';
  if (c > 80) return 'val-crit';
  return c > 70 ? 'val-warn' : 'val-good';
}
function voltClass(v) {
  if (v === null || v === undefined) return 'val-neutral';
  if (v < 3.0 || v > 3.6) return 'val-crit';
  return (v < 3.1 || v > 3.5) ? 'val-warn' : 'val-good';
}

function powerFill(cls) {
  return cls === 'val-good' ? 'power-ok' : cls === 'val-warn' ? 'power-warn' : 'power-crit';
}

function badges(d) {
  const out = [];
  if ((d.tx_errs_rate || 0) > 0.001 || (d.rx_errs_rate || 0) > 0.001) out.push('<span class="link-alert-badge">ERR</span>');
  if ((d.tx_drops_rate || 0) > 0.001 || (d.rx_drops_rate || 0) > 0.001) out.push('<span class="link-alert-badge link-alert-amber">DROP</span>');
  if ((d.carrier_changes || 0) > 3) out.push('<span class="link-alert-badge link-alert-amber">FLAP</span>');
  return out.join('');
}

function stat(label, valueHtml, tooltip) {
  const tip = tooltip ? ` data-tooltip="${esc(tooltip)}"` : '';
  return `<div class="link-stat"><span class="link-stat-label"${tip}>${esc(label)}</span>` +
         `<span class="link-stat-value">${valueHtml}</span></div>`;
}

function trafficBars(d) {
  const tx = ratePct(d.tx_bytes_rate, d.speed_mbps), rx = ratePct(d.rx_bytes_rate, d.speed_mbps);
  const row = (label, pct, rate, isTx) => `
    <div class="traffic-row">
      <span class="traffic-label">${label}</span>
      <div class="lt-progress ${barClass(pct, isTx)}"><div class="lt-progress-bar" style="width:${pct}%"></div></div>
      <span class="traffic-value">${fmtRate(rate)}</span>
    </div>`;
  return `<div class="traffic-section">${row('TX', tx, d.tx_bytes_rate, true)}${row('RX', rx, d.rx_bytes_rate, false)}</div>`;
}

function sfpPanel(s) {
  if (!s || !Object.keys(s).length) return '';
  const rx = rxClass(s.rx_power_dbm), tx = txClass(s.tx_power_dbm);
  const has = v => v !== null && v !== undefined;
  const rxPct = has(s.rx_power_dbm) ? Math.min(100, Math.max(0, (s.rx_power_dbm + 20) / 15 * 100)) : 0;
  const txPct = has(s.tx_power_dbm) ? Math.min(100, Math.max(0, (s.tx_power_dbm + 10) / 8 * 100)) : 0;
  const item = (label, cls, value, tip, pct) => `
    <div class="sfp-stat">
      <span class="sfp-stat-label" data-tooltip="${esc(tip)}">${label}</span>
      <span class="sfp-stat-value ${cls}">${value}</span>
      ${pct === undefined ? '' : `<div class="power-row"><div class="power-track"><div class="power-fill ${powerFill(cls)}" style="width:${pct}%"></div></div></div>`}
    </div>`;
  const vendor = [s.vendor, s.part_no, s.sfp_type, s.connector, s.wavelength_nm && `${s.wavelength_nm} nm`]
    .filter(Boolean).map(esc).join(' / ');
  return `
    <div class="sfp-panel">
      <div class="sfp-vendor-row">${vendor}</div>
      <div class="sfp-grid">
        ${item('Temp', tempClass(s.temp_c), fmtUnit(s.temp_c, '°C', 1), 'Module temperature. Normal: below 70°C.')}
        ${item('Voltage', voltClass(s.voltage_v), fmtUnit(s.voltage_v, 'V', 2), 'Supply voltage. Normal: 3.1–3.5 V.')}
        ${item('Bias', '', fmtUnit(s.bias_ma, 'mA', 2), 'Laser bias current. High values may mean an aging laser.')}
        ${item('TX Power', tx, fmtUnit(s.tx_power_dbm, 'dBm', 2), 'Optical transmit power.', txPct)}
        ${item('RX Power', rx, fmtUnit(s.rx_power_dbm, 'dBm', 2), 'Optical receive power. Very low values may mean dirty or damaged fiber.', rxPct)}
        ${has(s.rx_power_dbm) && has(s.tx_power_dbm) ? item('RX−TX Δ', '', `${(s.rx_power_dbm - s.tx_power_dbm).toFixed(2)} dBm`, 'Difference between receive and transmit power.') : ''}
      </div>
    </div>`;
}

// ── Normalized rows, so hosts and switches share one table ───────────
function hostRows(interfaces) {
  return Object.entries(interfaces)
    .sort(([a], [b]) => a.localeCompare(b, undefined, { numeric: true }))
    .map(([name, d]) => {
      const up = d.state ? d.state === 'up' : d.link_detected !== false;
      return {
        id: name, label: name, up, data: d, sub: d.port_type || '',
        detail: `
          <div class="link-stats-grid">
            ${stat('Duplex', esc(d.duplex || '–'), 'Full = both directions at once. Half can cause collisions.')}
            ${stat('Auto-neg', d.auto_neg === null || d.auto_neg === undefined ? '–' : d.auto_neg ? 'On' : 'Off')}
            ${stat('Carrier Δ', d.carrier_changes === null || d.carrier_changes === undefined ? '–' : esc(d.carrier_changes), 'Times the link went up or down. High values mean flapping.')}
            ${stat('TX Err/s', fmtErrors(d.tx_errs_rate))}
            ${stat('RX Err/s', fmtErrors(d.rx_errs_rate))}
            ${stat('TX Drop/s', fmtErrors(d.tx_drops_rate))}
            ${stat('RX Drop/s', fmtErrors(d.rx_drops_rate))}
          </div>
          ${trafficBars(d)}
          ${sfpPanel(d.sfp)}`,
      };
    });
}

function portRows(ports) {
  return Object.entries(ports)
    .sort(([, a], [, b]) => (a.port_idx || 0) - (b.port_idx || 0))
    .map(([name, d]) => {
      return {
        id: name, label: name, num: d.port_idx, up: !!d.up, data: d,
        neighbor: d.lldp ? { name: d.lldp.system_name, port: d.lldp.port_id, chassis: d.lldp.chassis_id } : null,
        sub: [d.is_uplink ? 'uplink' : '', d.media || '', d.poe_power ? `PoE ${d.poe_power.toFixed(1)} W` : ''].filter(Boolean).join(' · '),
      };
    });
}

function rowHasProblem(r) {
  return !!badges(r.data);
}

function renderTable(rows) {
  const q = _query.trim().toLowerCase();
  const shown = rows.filter(r => {
    if (_filter === 'up' && !r.up) return false;
    if (_filter === 'problems' && !rowHasProblem(r)) return false;
    return !q || `${r.label} ${r.num || ''} ${r.sub} ${(r.neighbor && r.neighbor.name) || ''}`.toLowerCase().includes(q);
  });
  if (!shown.length) return '<div class="lt-empty-state lt-empty-state--sm"><div class="lt-empty-state-title">Nothing matches this filter</div></div>';
  const isPorts = rows.some(r => r.num !== undefined);
  const body = shown.map(r => {
    const open = !isPorts && _openRows.has(r.id);
    const d = r.data;
    const neighbor = r.neighbor
      ? (r.neighbor.name ? `<a class="device-link" href="${esc(deviceUrl(r.neighbor.name))}">${esc(r.neighbor.name)}</a>` : esc(r.neighbor.chassis || r.neighbor.port || ''))
      : '–';
    return `
      <tr class="device-row${r.up ? '' : ' device-row--down'}"${isPorts ? ` data-port-idx="${esc(r.num)}"` : ''}>
        <td><button type="button" class="device-row-toggle" data-row="${esc(r.id)}"${isPorts ? '' : ` aria-expanded="${open}"`} aria-label="Details for ${esc(r.label)}">${open ? '▾' : '▸'}</button></td>
        <td><span class="dot-${r.up ? 'up' : 'down'}"></span></td>
        <td class="device-row-name">${r.num !== undefined ? `<span class="port-badge port-badge-num">#${esc(r.num)}</span> ` : ''}${esc(r.label)}<div class="device-row-sub">${esc(r.sub)}</div></td>
        <td class="device-num">${r.up ? fmtSpeed(d.speed_mbps) : '–'}</td>
        <td class="device-num device-col-wide">${fmtRate(d.rx_bytes_rate)}</td>
        <td class="device-num device-col-wide">${fmtRate(d.tx_bytes_rate)}</td>
        ${isPorts ? `<td class="device-col-wide">${neighbor}</td>` : ''}
        <td>${badges(d) || (r.up ? '<span class="val-good">OK</span>' : '<span class="device-row-sub">down</span>')}</td>
      </tr>
      ${open ? `<tr class="device-row-detail"><td colspan="7">${r.detail}</td></tr>` : ''}`;
  }).join('');
  return `
    <div class="lt-table-wrap">
      <table class="lt-table device-table">
        <caption class="lt-sr-only">Interfaces</caption>
        <thead><tr>
          <th><span class="lt-sr-only">Expand</span></th><th><span class="lt-sr-only">State</span></th>
          <th>${isPorts ? 'Port' : 'Interface'}</th><th>Speed</th><th class="device-col-wide">RX</th><th class="device-col-wide">TX</th>
          ${isPorts ? '<th class="device-col-wide">Neighbor</th>' : ''}<th>Health</th>
        </tr></thead>
        <tbody>${body}</tbody>
      </table>
    </div>`;
}

function section(title, inner, id) {
  return `
    <section class="g-section"${id ? ` id="${id}"` : ''}>
      <div class="g-section-header"><h2 class="g-section-title">${esc(title)}</h2></div>
      <div class="lt-frame">
        <span class="lt-frame-bl">&#x255A;</span><span class="lt-frame-br">&#x255D;</span>
        ${inner}
      </div>
    </section>`;
}

function kvGrid(pairs) {
  return `<div class="modem-stats">${pairs.filter(([, v]) => v !== null && v !== undefined && v !== '').map(([k, v]) => `
    <div class="modem-stat"><span class="modem-stat-label">${esc(k)}</span><span class="modem-stat-value">${esc(v)}</span></div>`).join('')}</div>`;
}

function renderOverview(d) {
  const info = d.info || {};
  const pct = v => (v === null || v === undefined ? null : `${v.toFixed(0)}%`);
  const temps = (info.temps || []).filter(t => t.value_c !== null).map(t => `${t.name} ${t.value_c.toFixed(0)}°C`).join(', ');
  return section('Overview', kvGrid([
    ['Status', (d.status || 'unknown').toUpperCase()],
    ['Type', d.kind],
    ['IP', d.ip],
    ['MAC', d.mac],
    ['Model', d.model],
    ['Firmware', info.firmware],
    ['Uptime', info.uptime_s === undefined ? null : fmtUptime(info.uptime_s)],
    ['CPU', pct(info.cpu_pct)],
    ['Memory', pct(info.mem_pct)],
    ['Clients', info.clients],
    ['Temperature', temps],
    ['Power draw', info.power_w === null || info.power_w === undefined ? null : `${info.power_w.toFixed(0)} W`],
    ['Data source', d.source],
  ]));
}

function renderUplinks(d) {
  if (!(d.uplinks || []).length) return '';
  const rows = d.uplinks.map(u => `
    <tr>
      <td><span class="dot-${u.up ? 'up' : 'down'}"></span></td>
      <td>${esc(u.host_interface || '–')}</td>
      <td><a class="device-link" href="${esc(deviceUrl(u.switch))}">${esc(u.switch)}</a></td>
      <td><a class="device-link" href="${esc(deviceUrl(u.switch))}#port-${esc(u.port_idx)}">#${esc(u.port_idx)} ${esc(u.port)}</a></td>
      <td>${fmtSpeed(u.speed_mbps)}</td>
    </tr>`).join('');
  return section('Connected to', `<div class="lt-table-wrap"><table class="lt-table">
    <caption class="lt-sr-only">Switch ports this host connects to, from LLDP</caption>
    <thead><tr><th><span class="lt-sr-only">State</span></th><th>Interface</th><th>Switch</th><th>Port</th><th>Speed</th></tr></thead>
    <tbody>${rows}</tbody></table></div>`);
}

function renderWan(d) {
  const wan = (d.info && d.info.wan) || {};
  const names = Object.keys(wan);
  if (!names.length) return '';
  const rows = names.map(n => {
    const w = wan[n];
    return `<tr><td><span class="dot-${w.up ? 'up' : 'down'}"></span></td><td>${esc(n.toUpperCase())}</td>
      <td>${fmtSpeed(w.speed_mbps)}</td><td>${w.latency_ms === null || w.latency_ms === undefined ? '–' : `${esc(w.latency_ms)} ms`}</td>
      <td>${w.availability === null || w.availability === undefined ? '–' : `${esc(w.availability)}%`}</td></tr>`;
  }).join('');
  return section('WAN', `<div class="lt-table-wrap"><table class="lt-table">
    <caption class="lt-sr-only">WAN connections</caption>
    <thead><tr><th><span class="lt-sr-only">State</span></th><th>Connection</th><th>Speed</th><th>Latency</th><th>Availability</th></tr></thead>
    <tbody>${rows}</tbody></table></div>`);
}

function renderOutlets(d) {
  const outlets = (d.info && d.info.outlets) || [];
  if (!outlets.length) return '';
  const rows = outlets.map(o => `
    <tr>
      <td><span class="dot-${o.on ? 'up' : 'down'}"></span></td>
      <td>#${esc(o.index)}</td>
      <td>${esc(o.name || '–')}</td>
      <td class="device-num">${o.power_w === null || o.power_w === undefined ? '–' : `${o.power_w.toFixed(1)} W`}</td>
      <td>${o.auto_power_cycle ? '<span class="lt-badge">auto power-cycle</span>' : ''}</td>
    </tr>`).join('');
  return section('Outlets', `<div class="lt-table-wrap"><table class="lt-table">
    <caption class="lt-sr-only">PDU outlets</caption>
    <thead><tr><th><span class="lt-sr-only">State</span></th><th>Outlet</th><th>Name</th><th>Power</th><th></th></tr></thead>
    <tbody>${rows}</tbody></table></div>`);
}

function renderEvents(events) {
  const body = !(events || []).length
    ? '<div class="lt-empty-state lt-empty-state--sm"><div class="lt-empty-state-icon">✔</div><div class="lt-empty-state-title">No recorded alerts</div></div>'
    : `<div class="lt-table-wrap"><table class="lt-table">
        <caption class="lt-sr-only">Alerts for this device</caption>
        <thead><tr><th>Sev</th><th>Type</th><th>Detail</th><th>Description</th><th>First seen</th><th>State</th></tr></thead>
        <tbody>${events.map(e => `
          <tr class="${e.resolved_at ? '' : `row-${esc(e.severity)}`}">
            <td><span class="lt-badge badge-${e.resolved_at ? 'resolved' : esc(e.severity)}">${esc(e.severity)}</span>${e.is_suppressed && !e.resolved_at ? '<span class="lt-badge badge-suppressed">🔕 sup</span>' : ''}</td>
            <td>${esc(e.event_type.replace(/_/g, ' '))}</td>
            <td>${esc(e.target_detail || '–')}</td>
            <td class="desc-cell">${esc(e.description || '')}</td>
            <td class="ts-cell" title="${esc(e.first_seen || '')}">${esc(lt.time.ago(_toIso(e.first_seen)))}</td>
            <td>${e.resolved_at ? `resolved ${esc(lt.time.ago(_toIso(e.resolved_at)))}` : '<strong>active</strong>'}</td>
          </tr>`).join('')}</tbody></table></div>`;
  return section('Alerts', body);
}

function currentRows() {
  if (!_device) return [];
  if (_device.ports) return portRows(_device.ports);
  if (_device.interfaces) return hostRows(_device.interfaces);
  return [];
}

function renderInterfaces() {
  const wrap = document.getElementById('device-table-wrap');
  if (!wrap) return;
  wrap.innerHTML = renderTable(currentRows());
  highlightSelectedPort();
}

function updateInterfaceSection(rows, title) {
  const section = document.getElementById('device-ports');
  section.hidden = !rows.length;
  if (!rows.length) return;
  document.getElementById('device-ports-title').textContent =
    `${title} · ${rows.filter(r => r.up).length} of ${rows.length} up`;
  document.getElementById('device-table-search').setAttribute('aria-label', `Filter ${title.toLowerCase()}`);
  document.getElementById('device-error-count').textContent = rows.filter(rowHasProblem).length;
}

function render(d) {
  _device = d;
  document.getElementById('device-dot').className = `dot-${d.status || 'unknown'}`;
  document.getElementById('device-subtitle').textContent =
    [d.kind, d.ip, d.model].filter(Boolean).join(' · ') +
    (d.updated ? ` · updated ${new Date(_toIso(d.updated)).toLocaleTimeString()}` : '');

  const unifi = d.source === 'unifi';
  document.getElementById('device-actions').innerHTML = `
    <button class="lt-btn lt-btn-ghost lt-btn-sm btn-suppress" data-sup-type="${unifi ? 'unifi_device' : 'host'}"
            data-sup-name="${esc(d.name)}" data-sup-detail="" aria-label="Suppress alerts for ${esc(d.name)}">🔕 Suppress</button>`;

  document.getElementById('device-root').innerHTML =
    renderOverview(d) +
    renderEvents(d.events) +
    renderWan(d) +
    renderUplinks(d) +
    renderOutlets(d);

  const hasPorts = !!(d.ports && Object.keys(d.ports).length);
  document.getElementById('device-inspector').classList.toggle('has-chassis', hasPorts);
  updateInterfaceSection(currentRows(), d.ports ? 'Ports' : 'Interfaces');
  if (hasPorts) renderPortInspector(d);
  renderInterfaces();

  if (d.kind === 'modem') refreshModem();
}

async function loadDevice() {
  try {
    render(await lt.api.get(`/api/device/${encodeURIComponent(DEVICE_NAME)}`));
  } catch (err) {
    if (_device) {
      lt.toast.error('Could not refresh device data');
      return;
    }
    const notFound = /404|No device/.test(err.message || '');
    document.getElementById('device-root').innerHTML = `
      <div class="lt-empty-state">
        <div class="lt-empty-state-icon">✕</div>
        <div class="lt-empty-state-title">${notFound ? 'No device with this name' : 'Could not load this device'}</div>
        <div class="lt-empty-state-body">${notFound ? 'It may have been renamed, or the monitor may not have seen it yet.' : 'Check that the Gandalf service is healthy, then refresh.'}</div>
      </div>`;
  }
}

document.addEventListener('click', e => {
  // Switch and router rows open the shared port panel, except when following a link
  const portRow = e.target.closest('tr.device-row[data-port-idx]');
  if (portRow && !e.target.closest('a')) {
    selectPortByIdx(_device.name, parseInt(portRow.dataset.portIdx, 10));
    return;
  }
  const toggle = e.target.closest('.device-row-toggle');
  if (toggle) {
    const id = toggle.dataset.row;
    if (_openRows.has(id)) _openRows.delete(id); else _openRows.add(id);
    renderInterfaces();
    return;
  }
  const pill = e.target.closest('[data-device-filter]');
  if (pill) {
    _filter = pill.dataset.deviceFilter;
    document.querySelectorAll('[data-device-filter]').forEach(p => {
      const on = p === pill;
      p.classList.toggle('active', on);
      p.setAttribute('aria-pressed', String(on));
    });
    renderInterfaces();
  }
});

document.addEventListener('input', e => {
  if (e.target.id === 'device-table-search') {
    _query = e.target.value;
    renderInterfaces();
  }
});

loadDevice();
const _deviceInterval = window.gandalfSettings?.refreshInterval ?? 60;
if (_deviceInterval > 0) lt.autoRefresh.start(loadDevice, Math.max(_deviceInterval, 15) * 1000);

window.onGandalfSettingsChanged = function (s) {
  lt.autoRefresh.stop();
  if (s.refreshInterval > 0) lt.autoRefresh.start(loadDevice, Math.max(s.refreshInterval, 15) * 1000);
};