/* =====================================================================
   L2 Physical Topology — display-only interactive map.
   Groups switches into frames (COBCO outer → workshop/DataCenter/Core),
   colours links by speed, nodes by latency & alarm, supports dark mode,
   terminal show / only-offline, live + historical snapshots, MAC/IP search.
   ===================================================================== */
(function () {
  'use strict';

  var CFG = window.L2_CFG || {};
  var T = window.L2_I18N || {};
  var META = window.L2_META || {};
  var SNAP = window.L2SNAP || null;

  var colors = CFG.colors || {100:'#F39C12',1000:'#2ECC71',10000:'#3498DB',20000:'#9B59B6',unknown:'#E74C3C',down:'#C0392B'};
  var LATW = (CFG.latency_warn != null) ? +CFG.latency_warn : 3;
  var LATB = (CFG.latency_bad != null) ? +CFG.latency_bad : 5;

  var TIER_BG = {core:'#1F4E78', dist:'#2E75B6', access:'#548235'};
  var TIER_BG_DARK = {core:'#1B4A72', dist:'#2A5E93', access:'#3E6B2E'};
  var SEV_COLORS = ['#97AAB3','#7499FF','#FFC859','#FFA059','#E97659','#E45959'];

  var NODE_W = 190, NODE_H = 56, GX = 26, GY = 18, PADX = 20, PADY = 42;
  var GROUP_GAP_X = 46, GROUP_GAP_Y = 48, MAXW = 2800;

  var cy = null;
  var dark = false;
  var showTerm = false;
  var onlyOff = false;
  var paused = false;
  var countdown = 0;
  var timer = null;
  var lastSnap = null;

  function el(id) { return document.getElementById(id); }
  function t(k, d) { return (T[k] != null) ? T[k] : (d != null ? d : k); }

  /* ---------------- name parsing / grouping ---------------- */
  function parseName(name) {
    var r = {workshop:'', floor:'', cab:'', u:'', area:'', role:'', ip:''};
    if (!name) return r;
    var toks = String(name).split('-');
    for (var i = 0; i < toks.length; i++) {
      var tk = toks[i];
      if (/^\d{1,3}(\.\d{1,3}){3}$/.test(tk)) { r.ip = tk; continue; }
      if (!r.workshop && /^\d{4}$/.test(tk)) { r.workshop = tk; continue; }
      if (!r.floor && /^\d[A-Z]\w*$/i.test(tk)) {
        var m = /^(\d)([A-Z])(\w+)$/i.exec(tk);
        if (m) { r.floor = m[1]; r.cab = m[2]; r.u = m[3]; continue; }
      }
      if (!r.area && /^(OFFICE|SURVE|GRDA|DC|IDC|LAB|PROD)$/i.test(tk)) { r.area = tk.toUpperCase(); continue; }
      if (!r.role && /^(Dist|Access|Core)$/i.test(tk)) { r.role = tk; }
    }
    return r;
  }

  function labelFor(n) {
    var p = parseName(n.name);
    var l1 = [];
    if (p.workshop) l1.push(p.workshop);
    if (p.area) l1.push(p.area);
    if (!l1.length) {
      l1.push((n.name || '').split('-')[0] || n.ip);
    }
    var l2 = [];
    if (p.floor) { var loc = p.floor + 'F' + (p.cab || '') + (p.u ? '-' + p.u + 'U' : ''); l1.push(loc); }
    if (p.role) l2.push(p.role);
    l2.push(n.ip);
    return l1.join(' · ') + '\n' + l2.join(' · ');
  }

  function expandLabel(tpl, m) {
    return String(tpl).replace(/\$(\d)/g, function (_, d) { return m && m[+d] != null ? m[+d] : ''; });
  }

  function groupOf(n) {
    var name = n.name || n.ip || '';
    var rules = CFG.group_rules || [];
    for (var i = 0; i < rules.length; i++) {
      var r = rules[i];
      if (r.match === 'regex') {
        var re;
        try { re = new RegExp(r.pattern); } catch (e) { continue; }
        var m = re.exec(name);
        if (m) return {label: expandLabel(r.label, m) || (CFG.other_label || 'Other'), big: !!r.big};
      } else {
        if (name.toLowerCase().indexOf(String(r.pattern).toLowerCase()) >= 0) return {label: r.label || (CFG.other_label || 'Other'), big: !!r.big};
      }
    }
    return {label: CFG.other_label || 'Other', big: false};
  }

  /* ---------------- layout ---------------- */
  function computeLayout(snap) {
    var groups = {};
    (snap.nodes || []).forEach(function (n) {
      var g = groupOf(n);
      if (!groups[g.label]) groups[g.label] = {label: g.label, big: g.big, nodes: []};
      if (g.big) groups[g.label].big = true;
      groups[g.label].nodes.push(n);
    });

    var order = Object.keys(groups).sort(function (a, b) {
      function rank(l) {
        if (/core/i.test(l)) return 0;
        if (/data\s*center/i.test(l)) return 1;
        if (/^\d+$/.test(l)) return 1000 + parseInt(l, 10);
        return 5000;
      }
      return rank(a) - rank(b);
    });

    var pos = {}, frames = [];
    var cursorX = 0, cursorY = 0, rowH = 0, minX = Infinity, minY = Infinity, maxX = -Infinity, maxY = -Infinity;

    order.forEach(function (label) {
      var g = groups[label];
      g.nodes.sort(function (a, b) {
        var da = a.depth || 0, db = b.depth || 0;
        if (da !== db) return da - db;
        return (a.name || '').localeCompare(b.name || '');
      });
      var n = g.nodes.length;
      var cols = Math.min(4, Math.max(1, Math.ceil(Math.sqrt(n))));
      var rows = Math.ceil(n / cols);
      var innerW = cols * NODE_W + (cols - 1) * GX;
      var innerH = rows * NODE_H + (rows - 1) * GY;
      var boxW = innerW + PADX * 2;
      var boxH = innerH + PADY + 12;

      if (cursorX > 0 && cursorX + boxW > MAXW) { cursorX = 0; cursorY += rowH + GROUP_GAP_Y; rowH = 0; }

      g.nodes.forEach(function (nd, i) {
        var rr = Math.floor(i / cols), cc = i % cols;
        pos[nd.id] = {
          x: cursorX + PADX + cc * (NODE_W + GX) + NODE_W / 2,
          y: cursorY + PADY + rr * (NODE_H + GY) + NODE_H / 2
        };
      });
      frames.push({label: label, big: g.big, x: cursorX, y: cursorY, w: boxW, h: boxH});
      minX = Math.min(minX, cursorX); minY = Math.min(minY, cursorY);
      maxX = Math.max(maxX, cursorX + boxW); maxY = Math.max(maxY, cursorY + boxH);

      cursorX += boxW + GROUP_GAP_X;
      rowH = Math.max(rowH, boxH);
    });

    var root = null;
    if (frames.length) {
      var m = 28;
      root = {x: minX - m, y: minY - m - 30, w: (maxX - minX) + 2 * m, h: (maxY - minY) + 2 * m + 30};
      root.cx = root.x + root.w / 2; root.cy = root.y + root.h / 2;
    }
    return {pos: pos, frames: frames, root: root};
  }

  /* ---------------- speed colour ---------------- */
  function speedColor(speed, state) {
    if (state && state !== 'up') return colors.down;
    var s = parseFloat(speed);
    if (!isFinite(s) || s <= 0) return colors.unknown;
    if (s <= 100) return colors['100'];
    if (s <= 1000) return colors['1000'];
    if (s <= 10000) return colors['10000'];
    return colors['20000'];
  }
  function speedWidth(speed) {
    var s = parseFloat(speed) || 0;
    if (s >= 20000) return 4.5;
    if (s >= 10000) return 3.6;
    if (s >= 1000) return 2.6;
    return 1.8;
  }

  /* ---------------- style ---------------- */
  function styleFor(d) {
    var bg = d ? TIER_BG_DARK : TIER_BG;
    return [
      {selector: 'node', style: {
        'width': 'data(w)', 'height': 'data(h)', 'shape': 'round-rectangle',
        'background-color': 'data(bg)', 'border-width': 2, 'border-color': 'data(bd)',
        'label': 'data(label)', 'color': d ? '#eaf1fb' : '#ffffff',
        'font-size': 11.5, 'font-weight': 600, 'text-valign': 'center', 'text-halign': 'center',
        'text-wrap': 'wrap', 'text-max-width': NODE_W - 16, 'padding': '2px',
        'overlay-opacity': 0, 'z-index-compare': 'manual', 'z-index': 20
      }},
      {selector: 'node[type="frame"]', style: {
        'background-opacity': d ? 0.05 : 0.035, 'background-color': d ? '#5b7bb0' : '#8fa6c4',
        'border-width': 1.6, 'border-style': 'dashed', 'border-color': d ? '#3f5377' : '#c2ccdb',
        'label': 'data(label)', 'text-valign': 'top', 'text-halign': 'center',
        'font-size': 'data(fs)', 'font-weight': 800, 'color': d ? '#aebfd8' : '#526178',
        'text-margin-y': 8, 'padding': '0px', 'events': 'no', 'z-index-compare': 'manual', 'z-index': 2
      }},
      {selector: 'node[type="root"]', style: {
        'background-opacity': d ? 0.02 : 0.012, 'background-color': d ? '#7aa0d8' : '#8ea6c2',
        'border-width': 2.2, 'border-style': 'solid', 'border-color': d ? '#476492' : '#9fb0c6',
        'label': 'data(label)', 'text-valign': 'top', 'text-halign': 'center',
        'font-size': 28, 'font-weight': 900, 'color': d ? '#cfe0ff' : '#33465f',
        'text-margin-y': 10, 'events': 'no', 'z-index-compare': 'manual', 'z-index': 0
      }},
      {selector: 'node[type="term"]', style: {
        'width': 12, 'height': 12, 'shape': 'ellipse', 'background-color': 'data(bg)',
        'border-width': 1, 'border-color': d ? '#2a3648' : '#cfd8e3', 'label': '',
        'z-index-compare': 'manual', 'z-index': 30
      }},
      {selector: 'edge', style: {
        'width': 'data(w)', 'line-color': 'data(color)', 'line-style': 'data(ls)',
        'curve-style': 'bezier', 'opacity': 0.92, 'target-arrow-shape': 'none',
        'z-index-compare': 'manual', 'z-index': 12
      }},
      {selector: 'edge[type="term"]', style: {
        'width': 0.7, 'line-color': d ? '#3b4a5e' : '#c5cfdb', 'opacity': 0.55,
        'curve-style': 'bezier', 'z-index-compare': 'manual', 'z-index': 11
      }},
      {selector: 'node.alarm', style: {'border-width': 6}},
      {selector: 'node.lat-warn', style: {'border-color': '#F39C12'}},
      {selector: 'node.lat-bad', style: {'border-color': '#E74C3C', 'border-width': 6}},
      {selector: 'node.hl', style: {'border-color': '#ff0', 'border-width': 7, 'overlay-color': '#ff0', 'overlay-opacity': 0.25, 'overlay-padding': 6}},
      {selector: 'node[type="switch"]', style: {'background-color': function (e) { return e.data('bg'); }}}
    ];
  }

  /* ---------------- render ---------------- */
  function render(snap) {
    if (!snap || !snap.nodes) {
      el('l2-cy').innerHTML = '<div class="l2-empty">' + t('l2.no_data', 'No data') + '</div>';
      return;
    }
    lastSnap = snap;
    var L = computeLayout(snap);
    var els = [];

    if (L.root) {
      els.push({group: 'nodes', data: {id: '__root', type: 'root', label: CFG.root_label || 'COBCO', w: L.root.w, h: L.root.h},
        position: {x: L.root.cx, y: L.root.cy}, selectable: false, grabbable: false});
    }
    L.frames.forEach(function (f, i) {
      els.push({group: 'nodes', data: {id: 'grp_' + i, type: 'frame', label: f.label, w: f.w, h: f.h, fs: f.big ? 20 : 14},
        position: {x: f.x + f.w / 2, y: f.y + f.h / 2}, selectable: false, grabbable: false});
    });

    var switchIds = {};
    (snap.nodes || []).forEach(function (n) {
      switchIds[n.id] = true;
      var p = L.pos[n.id] || {x: 0, y: 0};
      var tier = n.tier || 'access';
      var tkey = (tier.indexOf('dist') === 0) ? 'dist' : (tier.indexOf('core') === 0 ? 'core' : 'access');
      var cls = [];
      var bd = (dark ? TIER_BG_DARK[tkey] : TIER_BG[tkey]) || '#555';
      if (n.maxsev != null && n.maxsev >= 0 && (n.alarms && n.alarms.length)) {
        cls.push('alarm');
        bd = SEV_COLORS[Math.max(0, Math.min(5, n.maxsev))];
      }
      if (n.latency_ms != null) {
        if (+n.latency_ms > LATB) cls.push('lat-bad');
        else if (+n.latency_ms > LATW) cls.push('lat-warn');
      }
      els.push({group: 'nodes', data: {
        id: n.id, type: 'switch', name: n.name, ip: n.ip, tier: tier, depth: n.depth,
        hostid: n.hostid, oper: n.oper, maxsev: n.maxsev, alarms: n.alarms || [],
        term_online: n.term_online, term_offline: n.term_offline, latency_ms: n.latency_ms,
        label: labelFor(n), bg: (dark ? TIER_BG_DARK[tkey] : TIER_BG[tkey]) || '#777',
        bd: bd, w: NODE_W, h: NODE_H, tw: NODE_W - 16, z: 20, group: groupOf(n).label
      }, position: p, classes: cls.join(' ')});
    });

    (snap.edges || []).forEach(function (e, i) {
      if (!switchIds[e.source] || !switchIds[e.target]) return;
      els.push({group: 'edges', data: {
        id: 'e_' + i, source: e.source, target: e.target, speed: e.speed, state: e.state,
        a_port: e.a_port, b_port: e.b_port,
        color: speedColor(e.speed, e.state), ls: (e.state && e.state !== 'up') ? 'dashed' : 'solid',
        w: speedWidth(e.speed)
      }});
    });

    // terminals
    if (showTerm) {
      var bySw = {};
      (snap.terminals || []).forEach(function (tm) {
        if (!switchIds[tm.sw_ip]) return;
        if (onlyOff && tm.online) return;
        (bySw[tm.sw_ip] = bySw[tm.sw_ip] || []).push(tm);
      });
      var cnt = 0;
      Object.keys(bySw).forEach(function (sw) {
        var base = L.pos[sw]; if (!base) return;
        bySw[sw].sort(function (a, b) { return (a.online === b.online) ? 0 : (a.online ? -1 : 1); });
        bySw[sw].forEach(function (tm, k) {
          var col = k % 9, row = Math.floor(k / 9);
          var x = base.x - 54 + col * 13;
          var y = base.y + NODE_H / 2 + 16 + row * 13;
          els.push({group: 'nodes', data: {id: 't_' + tm.mac, type: 'term', bg: tm.online ? '#2ECC71' : '#95a5a6', mac: tm.mac, ip: tm.ip, online: tm.online},
            position: {x: x, y: y}, selectable: false});
          els.push({group: 'edges', data: {id: 'te_' + tm.mac, type: 'term', source: sw, target: 't_' + tm.mac}});
          cnt++;
        });
      });
    }

    if (!cy) {
      cy = cytoscape({
        container: el('l2-cy'),
        elements: els,
        style: styleFor(dark),
        layout: {name: 'preset', fit: true, padding: 50},
        wheelSensitivity: 0.2,
        minZoom: 0.05, maxZoom: 4
      });
      bindCy();
    } else {
      cy.elements().remove();
      cy.add(els);
      cy.style(styleFor(dark));
      cy.layout({name: 'preset', fit: true, padding: 50}).run();
    }

    updateStats(snap);
    buildLegend();
    buildAlarms(snap);
    buildOffline(snap);
  }

  /* ---------------- side panels & stats ---------------- */
  function updateStats(snap) {
    var s = snap.stats || {};
    var txt = '● ' + (s.switches || 0) + '  |  ⇄ ' + (s.edges || 0) + '  |  ' +
      (s.term_total || 0) + '(' + (s.term_online || 0) + '/' + (s.term_offline || 0) + ')  |  ⚠ ' + (s.alarms || 0);
    var up = snap.generated_iso ? ('  ·  ' + t('l2.updated', 'Updated') + ' ' + snap.generated_iso) : '';
    el('l2-stats').textContent = txt + up;
  }

  function buildLegend() {
    var h = '';
    function sw(c, label, dashed) { return '<div class="lg-row"><span class="lg-line' + (dashed ? ' lg-dash' : '') + '" style="border-top-color:' + c + '"></span>' + label + '</div>'; }
    h += '<div class="lg-title">' + t('l2.legend_speed', 'Link speed') + '</div>';
    h += sw(colors['100'], '100M') + sw(colors['1000'], '1G') + sw(colors['10000'], '10G') + sw(colors['20000'], '20G+');
    h += sw(colors.unknown, t('lbl.color_unknown', 'Unknown'));
    h += sw(colors.down, t('lbl.color_down', 'Down'), true);
    h += '<div class="lg-title">' + t('l2.legend_tier', 'Tier') + '</div>';
    h += '<div class="lg-row"><span class="lg-box" style="background:' + TIER_BG.core + '"></span>' + t('l2.core', 'Core') +
         '<span class="lg-box" style="background:' + TIER_BG.dist + ';margin-left:8px"></span>' + t('l2.dist', 'Distribution') +
         '<span class="lg-box" style="background:' + TIER_BG.access + ';margin-left:8px"></span>' + t('l2.access', 'Access') + '</div>';
    h += '<div class="lg-title">' + t('l2.legend_lat', 'Latency') + '</div>';
    h += '<div class="lg-row"><span class="lg-box" style="background:#F39C12;border-radius:2px"></span>&gt;' + LATW + 'ms' +
         '<span class="lg-box" style="background:#E74C3C;border-radius:2px;margin-left:8px"></span>&gt;' + LATB + 'ms</div>';
    h += '<div class="lg-row"><span class="lg-box" style="background:#E45959;border-radius:2px"></span>' + t('l2.alarms', 'Alarms') + '</div>';
    h += '<div class="lg-row"><span class="lg-box" style="background:#2ECC71;border-radius:50%"></span>' + t('l2.term_on', 'Online') +
         '<span class="lg-box" style="background:#95a5a6;border-radius:50%;margin-left:8px"></span>' + t('l2.term_off', 'Offline') + '</div>';
    el('l2-legend').innerHTML = h;
  }

  function buildAlarms(snap) {
    var items = [];
    (snap.nodes || []).forEach(function (n) {
      if (n.maxsev != null && n.maxsev >= 0 && n.alarms && n.alarms.length) {
        n.alarms.forEach(function (a) {
          items.push({sev: n.maxsev, title: (a.name || a.description || ''), host: n.name, ip: n.ip, id: n.id, hostid: n.hostid});
        });
      }
    });
    (snap.other_alarms || []).forEach(function (a) {
      items.push({sev: a.sev, title: a.name, host: a.host, ip: a.ip, id: null, hostid: null, other: true});
    });
    el('l2-alarm-count').textContent = items.length;
    if (!items.length) { el('l2-alarm-list').innerHTML = '<div class="panel-empty">' + t('l2.alarm_empty', 'No active alarms.') + '</div>'; return; }
    items.sort(function (a, b) { return b.sev - a.sev; });
    var h = '';
    items.forEach(function (it) {
      var col = SEV_COLORS[Math.max(0, Math.min(5, it.sev))] || '#999';
      h += '<div class="alarm-row" data-id="' + (it.id || '') + '" data-hostid="' + (it.hostid || '') + '">' +
        '<span class="alarm-dot" style="background:' + col + '"></span>' +
        '<div class="alarm-main"><div class="alarm-title">' + esc(it.title) + '</div>' +
        '<div class="alarm-sub">' + esc(it.host || '') + (it.ip ? ' · ' + esc(it.ip) : '') + (it.other ? ' · 拓扑外' : '') + '</div></div></div>';
    });
    var box = el('l2-alarm-list');
    box.innerHTML = h;
    box.querySelectorAll('.alarm-row').forEach(function (r) {
      r.addEventListener('click', function () {
        var id = r.getAttribute('data-id');
        if (id) focusNode(id);
        else { var hid = r.getAttribute('data-hostid'); if (hid) window.open(META.zabbixHostUrl.replace('__HOSTID__', hid), '_blank'); }
      });
    });
  }

  function buildOffline(snap) {
    var off = (snap.terminals || []).filter(function (tm) { return !tm.online; });
    el('l2-offline-count').textContent = off.length;
    if (!off.length) { el('l2-offline-list').innerHTML = '<div class="panel-empty">' + t('l2.offline_empty', 'No offline terminals.') + '</div>'; return; }
    var h = '';
    off.forEach(function (tm) {
      h += '<div class="off-row" data-mac="' + esc(tm.mac) + '">' +
        '<div class="off-main"><div class="off-mac">' + esc(tm.mac) + '</div>' +
        '<div class="off-sub">' + esc(tm.sw_name || tm.sw_ip) + ' · ' + esc(tm.port || '') + '</div></div></div>';
    });
    var box = el('l2-offline-list');
    box.innerHTML = h;
    box.querySelectorAll('.off-row').forEach(function (r) {
      r.addEventListener('click', function () {
        var mac = r.getAttribute('data-mac');
        if (!showTerm) { showTerm = true; el('l2-showterm').checked = true; render(lastSnap); }
        setTimeout(function () { focusNode('t_' + mac); }, 60);
      });
    });
  }

  function esc(s) { return String(s == null ? '' : s).replace(/[&<>"']/g, function (c) { return ({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'})[c]; }); }

  /* ---------------- interactions ---------------- */
  function focusNode(id) {
    if (!cy) return;
    var n = cy.getElementById(id);
    if (!n || n.empty() || n.length === 0) return;
    cy.elements().removeClass('hl');
    n.addClass('hl');
    cy.animate({center: {eles: n}, zoom: Math.max(cy.zoom(), 1.1), duration: 380});
    setTimeout(function () { n.removeClass('hl'); }, 2600);
  }

  function bindCy() {
    cy.on('mouseover', 'node[type="switch"]', function (e) {
      var d = e.target.data();
      var arr = d.alarms || [];
      var sev = (d.maxsev != null && d.maxsev >= 0) ? ('<span style="color:' + SEV_COLORS[d.maxsev] + '">● ' + SEV_NAMES[d.maxsev] + '</span>') : '—';
      var lat = (d.latency_ms != null) ? (d.latency_ms + ' ms') : '—';
      var html = '<b>' + esc(d.name) + '</b><br>' + esc(d.ip) + ' · ' + esc(d.group || '') + '<br>' +
        'Tier: ' + esc(d.tier) + ' · ' + (d.oper || '') + '<br>' +
        'Latency: ' + lat + '<br>' +
        'Terminals: ' + (d.term_online || 0) + ' on / ' + (d.term_offline || 0) + ' off<br>' +
        'Alarm: ' + sev;
      if (arr.length) html += '<hr>' + arr.map(function (a) { return esc(a.name || a.description || ''); }).join('<br>');
      showTip(e, html);
    });
    cy.on('mouseout', 'node[type="switch"]', hideTip);
    cy.on('mouseover', 'edge:not([type="term"])', function (e) {
      var d = e.target.data();
      var sp = (parseFloat(d.speed) || 0) >= 1000 ? ((parseFloat(d.speed) / 1000) + 'G') : (d.speed + 'M');
      showTip(e, 'Link ' + esc(d.a_port || '') + ' ↔ ' + esc(d.b_port || '') + '<br>' + sp + ' · ' + esc(d.state || ''));
    });
    cy.on('mouseout', 'edge', hideTip);
    cy.on('tap', 'node[type="switch"]', function (e) {
      var hid = e.target.data('hostid');
      if (hid) { /* single click: focus only; double handled below */ }
    });
    cy.on('dbltap', 'node[type="switch"]', function (e) {
      var hid = e.target.data('hostid');
      if (hid) window.open(META.zabbixHostUrl.replace('__HOSTID__', hid), '_blank');
    });
  }

  var SEV_NAMES = ['未分类','信息','警告','一般严重','严重','灾难'];

  function showTip(e, html) {
    var tip = el('l2-tip');
    tip.innerHTML = html;
    tip.style.display = 'block';
    var p = e.renderedPosition || {x: 0, y: 0};
    var box = el('l2-cy').getBoundingClientRect();
    var x = box.left + p.x + 16, y = box.top + p.y + 16;
    tip.style.left = x + 'px'; tip.style.top = y + 'px';
  }
  function hideTip() { el('l2-tip').style.display = 'none'; }

  /* ---------------- search ---------------- */
  function buildIndex(snap) {
    var idx = [];
    (snap.nodes || []).forEach(function (n) { idx.push({id: n.id, label: n.name, sub: n.ip, kind: 'sw'}); });
    (snap.terminals || []).forEach(function (tm) { idx.push({id: 't_' + tm.mac, label: tm.ip || tm.mac, sub: tm.mac + ' · ' + (tm.sw_name || ''), kind: 'term', mac: tm.mac}); });
    return idx;
  }
  var INDEX = [];
  function doSearch(q) {
    var box = el('l2-sug');
    q = (q || '').trim().toLowerCase();
    if (!q) { box.style.display = 'none'; box.innerHTML = ''; return; }
    var hits = [];
    for (var i = 0; i < INDEX.length && hits.length < 14; i++) {
      var it = INDEX[i];
      if ((it.label && it.label.toLowerCase().indexOf(q) >= 0) || (it.sub && it.sub.toLowerCase().indexOf(q) >= 0)) hits.push(it);
    }
    if (!hits.length) { box.innerHTML = '<div class="sug-empty">—</div>'; box.style.display = 'block'; return; }
    box.innerHTML = hits.map(function (h) {
      return '<div class="sug-row" data-id="' + esc(h.id) + '"><span class="sug-kind ' + h.kind + '">' + (h.kind === 'sw' ? 'SW' : 'PC') + '</span>' +
        '<span class="sug-lbl">' + esc(h.label) + '</span><span class="sug-sub">' + esc(h.sub || '') + '</span></div>';
    }).join('');
    box.style.display = 'block';
    box.querySelectorAll('.sug-row').forEach(function (r) {
      r.addEventListener('click', function () {
        var id = r.getAttribute('data-id');
        if (id.indexOf('t_') === 0 && !showTerm) { showTerm = true; el('l2-showterm').checked = true; render(lastSnap); setTimeout(function () { focusNode(id); }, 80); }
        else focusNode(id);
        box.style.display = 'none';
      });
    });
  }

  /* ---------------- toolbar wiring ---------------- */
  function setupControls() {
    dark = el('l2-wrap').classList.contains('l2-dark');
    el('l2-dark').checked = dark;

    el('l2-dark').addEventListener('change', function () {
      dark = el('l2-dark').checked;
      el('l2-wrap').classList.toggle('l2-dark', dark);
      if (cy) cy.style(styleFor(dark));
      buildLegend();
    });
    el('l2-showterm').addEventListener('change', function () { showTerm = el('l2-showterm').checked; render(lastSnap); });
    el('l2-onlyoff').addEventListener('change', function () {
      onlyOff = el('l2-onlyoff').checked;
      if (onlyOff && !showTerm) { showTerm = true; el('l2-showterm').checked = true; }
      render(lastSnap);
    });
    el('l2-zin').addEventListener('click', function () { if (cy) cy.zoom({level: cy.zoom() * 1.25, renderedPosition: {x: cy.width() / 2, y: cy.height() / 2}}); });
    el('l2-zout').addEventListener('click', function () { if (cy) cy.zoom({level: cy.zoom() / 1.25, renderedPosition: {x: cy.width() / 2, y: cy.height() / 2}}); });
    el('l2-fit').addEventListener('click', function () { if (cy) cy.fit(undefined, 50); });
    el('l2-refresh-btn').addEventListener('click', function () { reload(true); });

    var s = el('l2-search');
    s.addEventListener('input', function () { doSearch(s.value); });
    document.addEventListener('click', function (ev) {
      if (!ev.target.closest('.l2-search-wrap')) el('l2-sug').style.display = 'none';
    });

    el('l2-ts').addEventListener('change', function () {
      var v = el('l2-ts').value;
      var u = '/zabbix.php?action=l2.topology.view';
      if (v) u += '&ts=' + encodeURIComponent(v);
      window.location = u;
    });

    el('l2-pause').addEventListener('click', function () {
      paused = !paused;
      el('l2-pause').classList.toggle('on', paused);
      el('l2-pause').textContent = paused ? '▶' : '❚❚';
      el('l2-pause').title = paused ? t('l2.resume', 'Resume') : t('l2.pause', 'Pause');
    });
  }

  function reload(manual) {
    if (!META.isLive) return;
    fetch(META.snapshotUrl + '?t=' + Date.now(), {cache: 'no-store'})
      .then(function (r) { return r.json(); })
      .then(function (j) { if (j && j.nodes) { SNAP = j; INDEX = buildIndex(j); render(j); } })
      .catch(function () {})
      .then(function () { if (manual) resetCountdown(); });
  }

  function resetCountdown() { countdown = META.refreshSeconds || 300; }
  function startTimer() {
    if (!META.isLive) return;
    resetCountdown();
    timer = setInterval(function () {
      if (paused) { el('l2-countdown').textContent = '⏸'; return; }
      countdown--;
      if (countdown <= 0) { countdown = META.refreshSeconds || 300; reload(false); }
      var m = Math.floor(countdown / 60), s = countdown % 60;
      el('l2-countdown').textContent = '↻ ' + m + ':' + (s < 10 ? '0' + s : s);
    }, 1000);
  }

  /* ---------------- boot ---------------- */
  function boot() {
    setupControls();
    if (!SNAP || !SNAP.nodes) {
      el('l2-cy').innerHTML = '<div class="l2-empty">' + t('l2.no_data', 'No data') + '</div>';
    } else {
      INDEX = buildIndex(SNAP);
      render(SNAP);
    }
    if (META.isLive) startTimer();
    else { el('l2-pause').disabled = true; el('l2-countdown').textContent = t('l2.snapshot', 'Snapshot'); }
  }

  if (document.readyState === 'loading') document.addEventListener('DOMContentLoaded', boot);
  else boot();
})();