/*
 * script.js - Frontend logic for Dereth Tracker Single-Page Application.
 * Handles WebSocket communication, UI rendering of player lists, map display,
 * and user interactions (filtering, sorting, chat, stats windows).
 */
/**
 * script.js - Frontend controller for Dereth Tracker SPA
 *
 * Responsibilities:
 *   - Establish WebSocket connections to receive live telemetry and chat data
 *   - Fetch and render live player lists, trails, and map dots
 *   - Handle user interactions: filtering, sorting, selecting players
 *   - Manage dynamic UI components: chat windows, stats panels, tooltips
 *   - Provide smooth pan/zoom of map overlay using CSS transforms
 *
 * Structure:
 *   1. DOM references and constant definitions
 *   2. Color palette and assignment logic
 *   3. Sorting and filtering setup
 *   4. Utility functions (coordinate mapping, color hashing)
 *   5. UI window creation (stats, chat)
 *   6. Rendering functions for list and map
 *   7. Event listeners for map interactions and WebSocket messages
 */
/* ---------- DOM references --------------------------------------- */
const wrap         = document.getElementById('mapContainer');
const group        = document.getElementById('mapGroup');
const img          = document.getElementById('map');
const dots         = document.getElementById('dots');
const trailsContainer = document.getElementById('trails');
const list         = document.getElementById('playerList');
const btnContainer = document.getElementById('sortButtons');
const tooltip      = document.getElementById('tooltip');
const coordinates  = document.getElementById('coordinates');

// Global drag system to prevent event listener accumulation
let currentDragWindow = null;
let dragStartX = 0, dragStartY = 0, dragStartLeft = 0, dragStartTop = 0;

function makeDraggable(win, header) {
  if (!window.__chatZ) window.__chatZ = 10000;
  header.style.cursor = 'move';
  
  const bringToFront = () => {
    window.__chatZ += 1;
    win.style.zIndex = window.__chatZ;
  };
  
  header.addEventListener('mousedown', e => {
    if (e.target.closest('button')) return;
    e.preventDefault();
    currentDragWindow = win;
    bringToFront();
    dragStartX = e.clientX;
    dragStartY = e.clientY;
    dragStartLeft = win.offsetLeft;
    dragStartTop = win.offsetTop;
    document.body.classList.add('noselect');
  });
  
  // Touch support
  header.addEventListener('touchstart', e => {
    if (e.touches.length !== 1 || e.target.closest('button')) return;
    currentDragWindow = win;
    bringToFront();
    const t = e.touches[0];
    dragStartX = t.clientX;
    dragStartY = t.clientY;
    dragStartLeft = win.offsetLeft;
    dragStartTop = win.offsetTop;
  });
}

// Global mouse handlers (only added once)
window.addEventListener('mousemove', e => {
  if (!currentDragWindow) return;
  const dx = e.clientX - dragStartX;
  const dy = e.clientY - dragStartY;
  currentDragWindow.style.left = `${dragStartLeft + dx}px`;
  currentDragWindow.style.top = `${dragStartTop + dy}px`;
});

window.addEventListener('mouseup', () => {
  if (currentDragWindow) {
    currentDragWindow = null;
    document.body.classList.remove('noselect');
  }
});

window.addEventListener('touchmove', e => {
  if (!currentDragWindow || e.touches.length !== 1) return;
  const t = e.touches[0];
  const dx = t.clientX - dragStartX;
  const dy = t.clientY - dragStartY;
  currentDragWindow.style.left = `${dragStartLeft + dx}px`;
  currentDragWindow.style.top = `${dragStartTop + dy}px`;
});

window.addEventListener('touchend', () => {
  currentDragWindow = null;
});
// Filter input for player names (starts-with filter)
let currentFilter = '';
const filterInput = document.getElementById('playerFilter');
if (filterInput) {
  filterInput.addEventListener('input', e => {
    currentFilter = e.target.value.toLowerCase().trim();
    renderList();
  });
}

// WebSocket for chat and commands
let socket;
// Keep track of open chat windows: character_name -> DOM element
const chatWindows = {};
// Keep track of open stats windows: character_name -> DOM element
const statsWindows = {};
// Keep track of open inventory windows: character_name -> DOM element
const inventoryWindows = {};

/**
 * ---------- Application Constants -----------------------------
 * Defines key parameters for map rendering, data polling, and UI limits.
 *
 * MAX_Z: Maximum altitude difference considered (filter out outliers by Z)
 * FOCUS_ZOOM: Zoom level when focusing on a selected character
 * POLL_MS: Millisecond interval to fetch live player data and trails
 * MAP_BOUNDS: World coordinate bounds for the game map (used for projection)
 * API_BASE: Prefix for AJAX endpoints (set when behind a proxy)
 * MAX_CHAT_LINES: Max number of lines per chat window to cap memory usage
 * CHAT_COLOR_MAP: Color mapping for in-game chat channels by channel code
 */
/* ---------- constants ------------------------------------------- */
const MAX_Z       = 20;
const FOCUS_ZOOM  = 3;       // zoom level when you click a name
const POLL_MS     = 2000;
// UtilityBelt's more accurate coordinate bounds
const MAP_BOUNDS = {
  west: -102.1,
  east: 102.1,
  north: 102.1,
  south: -102.1
};

// Base path for tracker API endpoints; prefix API calls with '/api' when served behind a proxy
// If serving APIs at root, leave empty
const API_BASE = '';
// Maximum number of lines to retain in each chat window scrollback
const MAX_CHAT_LINES = 1000;
// Map numeric chat color codes to CSS hex colors
const CHAT_COLOR_MAP = {
  0:  '#00FF00', // Broadcast
  2:  '#FFFFFF', // Speech
  3:  '#FFD700', // Tell
  4:  '#CCCC00', // OutgoingTell
  5:  '#FF00FF', // System
  6:  '#FF0000', // Combat
  7:  '#00CCFF', // Magic
  8:  '#DDDDDD', // Channel
  9:  '#FF9999', // ChannelSend
 10:  '#FFFF33', // Social
 11:  '#CCFF33', // SocialSend
 12:  '#FFFFFF', // Emote
 13:  '#00FFFF', // Advancement
 14:  '#66CCFF', // Abuse
 15:  '#FF0000', // Help
 16:  '#33FF00', // Appraisal
 17:  '#0099FF', // Spellcasting
 18:  '#FF6600', // Allegiance
 19:  '#CC66FF', // Fellowship
 20:  '#00FF00', // WorldBroadcast
 21:  '#FF0000', // CombatEnemy
 22:  '#FF33CC', // CombatSelf
 23:  '#00CC00', // Recall
 24:  '#00FF00', // Craft
 25:  '#00FF66', // Salvaging
 27:  '#FFFFFF', // General
 28:  '#33FF33', // Trade
 29:  '#CCCCCC', // LFG
 30:  '#CC00CC', // Roleplay
 31:  '#FFFF00'  // AdminTell
};

/* ---------- Heat Map Globals ---------- */
let heatmapCanvas, heatmapCtx;
let heatmapEnabled = false;
let heatmapData = null;
let heatTimeout = null;
const HEAT_PADDING = 50;   // px beyond viewport to still draw
const HEAT_THROTTLE = 16;  // ~60 fps

/**
 * ---------- Player Color Assignment ----------------------------
 * Uses a predefined accessible color palette for player dots to ensure
 * high contrast and colorblind-friendly display. Once the palette
 * is exhausted, falls back to a deterministic hash-to-hue function.
 */
/* ---------- player/dot color assignment ------------------------- */
// A base palette of distinct, color-blind-friendly colors
const PALETTE = [
  // Original colorblind-friendly base palette
  '#1f77b4', '#ff7f0e', '#2ca02c', '#d62728', '#9467bd',
  '#8c564b', '#e377c2', '#7f7f7f', '#bcbd22', '#17becf',
  
  // Extended high-contrast colors
  '#ff4444', '#44ff44', '#4444ff', '#ffff44', '#ff44ff',
  '#44ffff', '#ff8844', '#88ff44', '#4488ff', '#ff4488',
  
  // Darker variants
  '#cc3333', '#33cc33', '#3333cc', '#cccc33', '#cc33cc',
  '#33cccc', '#cc6633', '#66cc33', '#3366cc', '#cc3366',
  
  // Brighter variants  
  '#ff6666', '#66ff66', '#6666ff', '#ffff66', '#ff66ff',
  '#66ffff', '#ffaa66', '#aaff66', '#66aaff', '#ff66aa',
  
  // Additional distinct colors
  '#990099', '#009900', '#000099', '#990000', '#009999',
  '#999900', '#aa5500', '#55aa00', '#0055aa', '#aa0055',
  
  // Light pastels for contrast
  '#ffaaaa', '#aaffaa', '#aaaaff', '#ffffaa', '#ffaaff',
  '#aaffff', '#ffccaa', '#ccffaa', '#aaccff', '#ffaacc'
];
// Map from character name to assigned color
const colorMap = {};
// Next index to pick from PALETTE
let nextPaletteIndex = 0;
/**
 * Assigns or returns a consistent color for a given name.
 * Uses a fixed palette first, then falls back to hue hashing.
 */
function getColorFor(name) {
  if (colorMap[name]) {
    return colorMap[name];
  }
  let color;
  if (nextPaletteIndex < PALETTE.length) {
    color = PALETTE[nextPaletteIndex++];
  } else {
    // Fallback: hash to HSL hue
    color = hue(name);
  }
  colorMap[name] = color;
  return color;
}

/*
 * ---------- Sort Configuration -------------------------------
 * Defines available sort criteria for the active player list:
 *  - name: alphabetical ascending
 *  - kph: kills per hour descending
 *  - kills: total kills descending
 *  - rares: rare events found during current session descending
 * Each option includes a label for UI display and a comparator function.
 */
/* ---------- sort configuration ---------------------------------- */
const sortOptions = [
  {
    value: "name",
    label: "Name",
    comparator: (a, b) => a.character_name.localeCompare(b.character_name)
  },
  {
    value: "kph",
    label: "KPH",
    comparator: (a, b) => b.kills_per_hour - a.kills_per_hour
  },
  {
    value: "kills",
    label: "S.Kills",
    comparator: (a, b) => b.kills - a.kills
  },
  {
    value: "rares",
    label: "S.Rares",
    comparator: (a, b) => (b.session_rares || 0) - (a.session_rares || 0)
  },
  {
    value: "total_kills",
    label: "T.Kills",
    comparator: (a, b) => (b.total_kills || 0) - (a.total_kills || 0)
  },
  {
    value: "kpr",
    label: "KPR",
    comparator: (a, b) => {
      const aKpr = (a.total_rares || 0) > 0 ? (a.total_kills || 0) / (a.total_rares || 0) : Infinity;
      const bKpr = (b.total_rares || 0) > 0 ? (b.total_kills || 0) / (b.total_rares || 0) : Infinity;
      return aKpr - bKpr; // Ascending - lower KPR is better (more efficient rare finding)
    }
  }
];

let currentSort    = sortOptions[0];
let currentPlayers = [];

/* ---------- generate segmented buttons -------------------------- */
sortOptions.forEach(opt => {
  const btn = document.createElement('div');
  btn.className = 'btn';
  btn.textContent = opt.label;
  btn.dataset.value = opt.value;
  if (opt.value === currentSort.value) btn.classList.add('active');

  btn.addEventListener('click', () => {
    btnContainer.querySelectorAll('.btn')
      .forEach(b => b.classList.remove('active'));
    btn.classList.add('active');
    currentSort = opt;
    renderList();
  });

  btnContainer.appendChild(btn);
});

/* ---------- map & state variables ------------------------------- */
let imgW = 0, imgH = 0;
let scale = 1, offX = 0, offY = 0, minScale = 1;
let dragging = false, sx = 0, sy = 0;
let selected = "";
let pollID = null;

/* ---------- utility functions ----------------------------------- */
const hue = name => {
  let h = 0;
  for (let c of name) h = c.charCodeAt(0) + ((h << 5) - h);
  return `hsl(${Math.abs(h) % 360},72%,50%)`;
};

const loc = (ns, ew) =>
  `${Math.abs(ns).toFixed(1)}${ns>=0?"N":"S"} `
  + `${Math.abs(ew).toFixed(1)}${ew>=0?"E":"W"}`;

function worldToPx(ew, ns) {
  const x = ((ew - MAP_BOUNDS.west)
           / (MAP_BOUNDS.east - MAP_BOUNDS.west)) * imgW;
  const y = ((MAP_BOUNDS.north - ns)
           / (MAP_BOUNDS.north - MAP_BOUNDS.south)) * imgH;
  return { x, y };
}

function pxToWorld(x, y) {
  // Convert screen coordinates to map image coordinates
  const mapX = (x - offX) / scale;
  const mapY = (y - offY) / scale;
  
  // Convert map image coordinates to world coordinates
  const ew = MAP_BOUNDS.west + (mapX / imgW) * (MAP_BOUNDS.east - MAP_BOUNDS.west);
  const ns = MAP_BOUNDS.north - (mapY / imgH) * (MAP_BOUNDS.north - MAP_BOUNDS.south);
  
  return { ew, ns };
}

/* ---------- Heat Map Functions ---------- */

function initHeatMap() {
  heatmapCanvas = document.getElementById('heatmapCanvas');
  if (!heatmapCanvas) {
    console.error('Heat map canvas not found');
    return;
  }
  
  heatmapCtx = heatmapCanvas.getContext('2d');
  
  const toggle = document.getElementById('heatmapToggle');
  if (toggle) {
    toggle.addEventListener('change', e => {
      heatmapEnabled = e.target.checked;
      if (heatmapEnabled) {
        fetchHeatmapData();
      } else {
        clearHeatmap();
      }
    });
  }
  
  window.addEventListener('resize', debounce(() => {
    if (heatmapEnabled && heatmapData) {
      renderHeatmap();
    }
  }, 250));
}

async function fetchHeatmapData() {
  try {
    const response = await fetch(`${API_BASE}/spawns/heatmap?hours=24&limit=50000`);
    if (!response.ok) {
      throw new Error(`Heat map API error: ${response.status}`);
    }
    
    const data = await response.json();
    heatmapData = data.spawn_points; // [{ew, ns, intensity}]
    console.log(`Loaded ${heatmapData.length} heat map points from last ${data.hours_window} hours`);
    renderHeatmap();
  } catch (err) {
    console.error('Failed to fetch heat map data:', err);
  }
}

function renderHeatmap() {
  if (!heatmapEnabled || !heatmapData || !heatmapCanvas || !imgW || !imgH) {
    return;
  }
  
  // Set canvas size to match map dimensions (1:1 DPI)
  heatmapCanvas.width = imgW;
  heatmapCanvas.height = imgH;
  heatmapCtx.clearRect(0, 0, imgW, imgH);
  
  // Current visible map rect in px for viewport culling
  const vw = wrap.clientWidth;
  const vh = wrap.clientHeight;
  const viewL = -offX / scale;
  const viewT = -offY / scale;
  const viewR = viewL + vw / scale;
  const viewB = viewT + vh / scale;
  
  // Render heat map points with viewport culling
  for (const point of heatmapData) {
    const { x, y } = worldToPx(point.ew, point.ns);
    
    // Skip points outside visible area (with padding for smooth edges)
    if (x < viewL - HEAT_PADDING || x > viewR + HEAT_PADDING ||
        y < viewT - HEAT_PADDING || y > viewB + HEAT_PADDING) {
      continue;
    }
    
    // Smaller, more precise spots to clearly show individual spawn locations
    const radius = Math.max(5, Math.min(12, 5 + Math.sqrt(point.intensity * 0.5)));
    
    // Sharp gradient with distinct boundaries between spawn points
    const gradient = heatmapCtx.createRadialGradient(x, y, 0, x, y, radius);
    gradient.addColorStop(0, `rgba(255, 0, 0, ${Math.min(0.9, point.intensity / 40)})`);      // Bright red center
    gradient.addColorStop(0.6, `rgba(255, 100, 0, ${Math.min(0.4, point.intensity / 120)})`); // Quick fade to orange
    gradient.addColorStop(1, 'rgba(255, 150, 0, 0)');
    
    heatmapCtx.fillStyle = gradient;
    heatmapCtx.fillRect(x - radius, y - radius, radius * 2, radius * 2);
  }
}

function clearHeatmap() {
  if (heatmapCtx && heatmapCanvas) {
    heatmapCtx.clearRect(0, 0, heatmapCanvas.width, heatmapCanvas.height);
  }
}

function debounce(fn, ms) {
  let timeout;
  return (...args) => {
    clearTimeout(timeout);
    timeout = setTimeout(() => fn(...args), ms);
  };
}

// Show or create a stats window for a character
function showStatsWindow(name) {
  if (statsWindows[name]) {
    const existing = statsWindows[name];
    // Toggle: close if already visible, open if hidden
    if (existing.style.display === 'flex') {
      existing.style.display = 'none';
    } else {
      existing.style.display = 'flex';
    }
    return;
  }
  const win = document.createElement('div');
  win.className = 'stats-window';
  win.dataset.character = name;
  // Header (reuses chat-header styling)
  const header = document.createElement('div');
  header.className = 'chat-header';
  const title = document.createElement('span');
  title.textContent = `Stats: ${name}`;
  const closeBtn = document.createElement('button');
  closeBtn.className = 'chat-close-btn';
  closeBtn.textContent = '×';
  closeBtn.addEventListener('click', () => { win.style.display = 'none'; });
  header.appendChild(title);
  header.appendChild(closeBtn);
  win.appendChild(header);
  // Time period controls
  const controls = document.createElement('div');
  controls.className = 'stats-controls';
  const timeRanges = [
    { label: '1H', value: 'now-1h' },
    { label: '6H', value: 'now-6h' },
    { label: '24H', value: 'now-24h' },
    { label: '7D', value: 'now-7d' }
  ];
  timeRanges.forEach(range => {
    const btn = document.createElement('button');
    btn.className = 'time-range-btn';
    btn.textContent = range.label;
    if (range.value === 'now-24h') btn.classList.add('active');
    btn.addEventListener('click', () => {
      controls.querySelectorAll('.time-range-btn').forEach(b => b.classList.remove('active'));
      btn.classList.add('active');
      updateStatsTimeRange(content, name, range.value);
    });
    controls.appendChild(btn);
  });
  win.appendChild(controls);
  
  // Content container
  const content = document.createElement('div');
  content.className = 'chat-messages';
  content.textContent = 'Loading stats...';
  win.appendChild(content);
  document.body.appendChild(win);
  statsWindows[name] = win;
  // Load initial stats with default 24h range
  updateStatsTimeRange(content, name, 'now-24h');
  // Enable dragging using the global drag system
  makeDraggable(win, header);
}

function updateStatsTimeRange(content, name, timeRange) {
  content.innerHTML = '';
  const panels = [
    { title: 'Kills per Hour', id: 1 },
    { title: 'Memory (MB)',    id: 2 },
    { title: 'CPU (%)',        id: 3 },
    { title: 'Mem Handles',    id: 4 }
  ];
  panels.forEach(p => {
    const iframe = document.createElement('iframe');
    iframe.src =
      `/grafana/d-solo/dereth-tracker/dereth-tracker-dashboard` +
      `?panelId=${p.id}` +
      `&var-character=${encodeURIComponent(name)}` +
      `&from=${timeRange}` +
      `&to=now` +
      `&theme=light`;
    iframe.setAttribute('title', p.title);
    iframe.width = '350';
    iframe.height = '200';
    iframe.frameBorder = '0';
    iframe.allowFullscreen = true;
    content.appendChild(iframe);
  });
}

// Show or create an inventory window for a character
function showInventoryWindow(name) {
  if (inventoryWindows[name]) {
    const existing = inventoryWindows[name];
    // Toggle: close if already visible, open if hidden
    if (existing.style.display === 'flex') {
      existing.style.display = 'none';
    } else {
      existing.style.display = 'flex';
    }
    return;
  }
  const win = document.createElement('div');
  win.className = 'inventory-window';
  win.dataset.character = name;
  // Header (reuses chat-header styling)
  const header = document.createElement('div');
  header.className = 'chat-header';
  const title = document.createElement('span');
  title.textContent = `Inventory: ${name}`;
  const closeBtn = document.createElement('button');
  closeBtn.className = 'chat-close-btn';
  closeBtn.textContent = '×';
  closeBtn.addEventListener('click', () => { win.style.display = 'none'; });
  header.appendChild(title);
  header.appendChild(closeBtn);
  win.appendChild(header);
  // Loading message
  const loading = document.createElement('div');
  loading.className = 'inventory-loading';
  loading.textContent = 'Loading inventory...';
  win.appendChild(loading);
  
  // Content container
  const content = document.createElement('div');
  content.className = 'inventory-content';
  content.style.display = 'none';
  win.appendChild(content);
  
  // Fetch inventory data from main app (which will proxy to inventory service)
  fetch(`${API_BASE}/inventory/${encodeURIComponent(name)}?limit=1000`)
    .then(response => {
      if (!response.ok) throw new Error(`HTTP ${response.status}`);
      return response.json();
    })
    .then(data => {
      loading.style.display = 'none';
      content.style.display = 'block';
      
      // Create inventory grid
      const grid = document.createElement('div');
      grid.className = 'inventory-grid';
      
      // Render each item
      data.items.forEach(item => {
        
        const slot = document.createElement('div');
        slot.className = 'inventory-slot';
        
        // Create layered icon container
        const iconContainer = document.createElement('div');
        iconContainer.className = 'item-icon-composite';
        
        // Get base icon ID with portal.dat offset
        const baseIconId = (item.icon + 0x06000000).toString(16).toUpperCase().padStart(8, '0');
        
        // Check for overlay and underlay from enhanced format or legacy format
        let overlayIconId = null;
        let underlayIconId = null;
        
        // Enhanced format (inventory service) - check for proper icon overlay/underlay properties
        if (item.icon_overlay_id && item.icon_overlay_id > 0) {
          overlayIconId = (item.icon_overlay_id + 0x06000000).toString(16).toUpperCase().padStart(8, '0');
        }
        
        if (item.icon_underlay_id && item.icon_underlay_id > 0) {
          underlayIconId = (item.icon_underlay_id + 0x06000000).toString(16).toUpperCase().padStart(8, '0');
        }
        
        // Fallback: Enhanced format (inventory service) - check spells object for decal info
        if (!overlayIconId && !underlayIconId && item.spells && typeof item.spells === 'object') {
          // Icon overlay (using the actual property names from the data)
          // Only use valid icon IDs (must be > 100 to avoid invalid small IDs)
          if (item.spells.spell_decal_218103838 && item.spells.spell_decal_218103838 > 100) {
            overlayIconId = (item.spells.spell_decal_218103838 + 0x06000000).toString(16).toUpperCase().padStart(8, '0');
          }
          
          // Icon underlay  
          if (item.spells.spell_decal_218103848 && item.spells.spell_decal_218103848 > 100) {
            underlayIconId = (item.spells.spell_decal_218103848 + 0x06000000).toString(16).toUpperCase().padStart(8, '0');
          }
        } else if (item.item_data) {
          // Legacy format - parse item_data
          try {
            const itemData = typeof item.item_data === 'string' ? JSON.parse(item.item_data) : item.item_data;
            
            if (itemData.IntValues) {
              // Icon overlay (ID 218103849) - only use valid icon IDs
              if (itemData.IntValues['218103849'] && itemData.IntValues['218103849'] > 100) {
                overlayIconId = (itemData.IntValues['218103849'] + 0x06000000).toString(16).toUpperCase().padStart(8, '0');
              }
              
              // Icon underlay (ID 218103850) - only use valid icon IDs
              if (itemData.IntValues['218103850'] && itemData.IntValues['218103850'] > 100) {
                underlayIconId = (itemData.IntValues['218103850'] + 0x06000000).toString(16).toUpperCase().padStart(8, '0');
              }
            }
          } catch (e) {
            console.warn('Failed to parse item data for', item.name);
          }
        }
        
        // Create underlay (bottom layer)
        if (underlayIconId) {
          const underlayImg = document.createElement('img');
          underlayImg.className = 'icon-underlay';
          underlayImg.src = `/icons/${underlayIconId}.png`;
          underlayImg.alt = 'underlay';
          underlayImg.onerror = function() { this.style.display = 'none'; };
          iconContainer.appendChild(underlayImg);
        }
        
        // Create base icon (middle layer)
        const baseImg = document.createElement('img');
        baseImg.className = 'icon-base';
        baseImg.src = `/icons/${baseIconId}.png`;
        baseImg.alt = item.name || 'Unknown Item';
        baseImg.onerror = function() {
          // Final fallback
          this.src = '/icons/06000133.png';
        };
        iconContainer.appendChild(baseImg);
        
        // Create overlay (top layer)
        if (overlayIconId) {
          const overlayImg = document.createElement('img');
          overlayImg.className = 'icon-overlay';
          overlayImg.src = `/icons/${overlayIconId}.png`;
          overlayImg.alt = 'overlay';
          overlayImg.onerror = function() { this.style.display = 'none'; };
          iconContainer.appendChild(overlayImg);
        }
        
        // Create tooltip data
        slot.dataset.name = item.name || 'Unknown Item';
        slot.dataset.value = item.value || 0;
        slot.dataset.burden = item.burden || 0;
        
        // Store enhanced data for tooltips
        // All data now comes from inventory service (no more local fallback)
        if (item.max_damage !== undefined || item.object_class_name !== undefined || item.spells !== undefined) {
          // Inventory service provides clean, structured data with translations
          // Only include properties that actually exist on the item
          const enhancedData = {};
          
          // Check all possible enhanced properties from inventory service
          const possibleProps = [
            'max_damage', 'armor_level', 'damage_bonus', 'attack_bonus',
            'wield_level', 'skill_level', 'lore_requirement', 'equip_skill', 'equip_skill_name',
            'material', 'material_name', 'material_id', 'imbue', 'item_set', 'tinks', 
            'workmanship', 'workmanship_text', 'damage_rating', 'crit_rating', 
            'heal_boost_rating', 'has_id_data', 'object_class_name', 'spells',
            'enhanced_properties', 'damage_range', 'damage_type', 'min_damage',
            'speed_text', 'speed_value', 'mana_display', 'spellcraft', 'current_mana', 'max_mana',
            'melee_defense_bonus', 'magic_defense_bonus', 'missile_defense_bonus', 
            'elemental_damage_vs_monsters', 'mana_conversion_bonus', 'icon_overlay_id', 'icon_underlay_id'
          ];
          
          // Only add properties that exist and have meaningful values
          possibleProps.forEach(prop => {
            if (item.hasOwnProperty(prop) && item[prop] !== undefined && item[prop] !== null) {
              enhancedData[prop] = item[prop];
            }
          });
          
          slot.dataset.enhancedData = JSON.stringify(enhancedData);
        } else {
          // No enhanced data available
          slot.dataset.enhancedData = JSON.stringify({});
        }
        
        // Add tooltip on hover
        slot.addEventListener('mouseenter', e => showInventoryTooltip(e, slot));
        slot.addEventListener('mousemove', e => showInventoryTooltip(e, slot));
        slot.addEventListener('mouseleave', hideInventoryTooltip);
        
        slot.appendChild(iconContainer);
        grid.appendChild(slot);
      });
      
      content.appendChild(grid);
      
      // Add item count
      const count = document.createElement('div');
      count.className = 'inventory-count';
      count.textContent = `${data.item_count} items`;
      content.appendChild(count);
    })
    .catch(err => {
      loading.textContent = `Failed to load inventory: ${err.message}`;
      console.error('Inventory fetch failed:', err);
    });
  
  document.body.appendChild(win);
  inventoryWindows[name] = win;
  
  // Enable dragging using the global drag system
  makeDraggable(win, header);
}

// Inventory tooltip functions
let inventoryTooltip = null;

function showInventoryTooltip(e, slot) {
  if (!inventoryTooltip) {
    inventoryTooltip = document.createElement('div');
    inventoryTooltip.className = 'inventory-tooltip';
    document.body.appendChild(inventoryTooltip);
  }
  
  const name = slot.dataset.name;
  const value = parseInt(slot.dataset.value) || 0;
  const burden = parseInt(slot.dataset.burden) || 0;
  
  // Build enhanced tooltip
  let tooltipHTML = `<div class="tooltip-name">${name}</div>`;
  
  // Basic stats
  tooltipHTML += `<div class="tooltip-section">`;
  tooltipHTML += `<div class="tooltip-value">Value: ${value.toLocaleString()}</div>`;
  tooltipHTML += `<div class="tooltip-burden">Burden: ${burden}</div>`;
  
  // Add workmanship right after basic stats for weapons/items
  if (slot.dataset.enhancedData) {
    try {
      const enhanced = JSON.parse(slot.dataset.enhancedData);
      if (enhanced.workmanship_text) {
        tooltipHTML += `<div class="tooltip-workmanship">Workmanship: ${enhanced.workmanship_text}</div>`;
      }
    } catch (e) {
      // Ignore parsing errors for this section
    }
  }
  
  tooltipHTML += `</div>`;
  
  // Enhanced data from inventory service
  if (slot.dataset.enhancedData) {
    try {
      const enhanced = JSON.parse(slot.dataset.enhancedData);
      
      // Only show enhanced sections if we have enhanced data
      if (Object.keys(enhanced).length > 0) {
      
      // Helper function to check for valid values
      const isValid = (val) => val !== undefined && val !== null && val !== -1 && val !== -1.0;
      
      // Weapon-specific stats section (for weapons)
      if (enhanced.damage_range || enhanced.speed_text || enhanced.equip_skill_name) {
        tooltipHTML += `<div class="tooltip-section">`;
        
        // Skill requirement
        if (enhanced.equip_skill_name) {
          tooltipHTML += `<div class="tooltip-property">Skill: ${enhanced.equip_skill_name}</div>`;
        }
        
        // Damage with type
        if (enhanced.damage_range && enhanced.damage_type) {
          const damageText = enhanced.damage_type !== 'Physical' ? 
            `${enhanced.damage_range}, ${enhanced.damage_type}` : 
            enhanced.damage_range;
          tooltipHTML += `<div class="tooltip-property">Damage: ${damageText}</div>`;
        }
        
        // Speed
        if (enhanced.speed_text) {
          tooltipHTML += `<div class="tooltip-property">Speed: ${enhanced.speed_text}</div>`;
        }
        
        // Attack and defense bonuses (as percentages)
        if (isValid(enhanced.attack_bonus)) {
          const attackPercent = ((enhanced.attack_bonus - 1) * 100).toFixed(1);
          if (attackPercent !== "0.0") {
            tooltipHTML += `<div class="tooltip-property">Bonus to Attack Skill: ${attackPercent > 0 ? '+' : ''}${attackPercent}%</div>`;
          }
        }
        
        // Defense bonuses
        if (enhanced.melee_defense_bonus && isValid(enhanced.melee_defense_bonus)) {
          const defensePercent = ((enhanced.melee_defense_bonus - 1) * 100).toFixed(1);
          if (defensePercent !== "0.0") {
            tooltipHTML += `<div class="tooltip-property">Bonus to Melee Defense: ${defensePercent > 0 ? '+' : ''}${defensePercent}%</div>`;
          }
        }
        
        // Magic defense bonus
        if (enhanced.magic_defense_bonus && isValid(enhanced.magic_defense_bonus)) {
          const magicDefensePercent = ((enhanced.magic_defense_bonus - 1) * 100).toFixed(1);
          if (magicDefensePercent !== "0.0") {
            tooltipHTML += `<div class="tooltip-property">Bonus to Magic Defense: ${magicDefensePercent > 0 ? '+' : ''}${magicDefensePercent}%</div>`;
          }
        }
        
        // Elemental damage vs monsters
        if (enhanced.elemental_damage_vs_monsters && isValid(enhanced.elemental_damage_vs_monsters)) {
          const elementalPercent = ((enhanced.elemental_damage_vs_monsters - 1) * 100).toFixed(1);
          if (elementalPercent !== "0.0") {
            tooltipHTML += `<div class="tooltip-property">Elemental Damage vs Monsters: ${elementalPercent > 0 ? '+' : ''}${elementalPercent}%</div>`;
          }
        }
        
        tooltipHTML += `</div>`;
      }
      
      // Traditional combat stats section (for non-weapons or additional stats)
      const combatProps = [];
      if (isValid(enhanced.armor_level)) combatProps.push(`Armor Level: ${enhanced.armor_level}`);
      if (!enhanced.damage_range && isValid(enhanced.max_damage)) combatProps.push(`Max Damage: ${enhanced.max_damage}`);
      if (!enhanced.attack_bonus && isValid(enhanced.damage_bonus)) combatProps.push(`Damage Bonus: ${enhanced.damage_bonus.toFixed(1)}`);
      
      if (combatProps.length > 0) {
        tooltipHTML += `<div class="tooltip-section"><div class="tooltip-section-title">Combat Stats</div>`;
        combatProps.forEach(prop => {
          tooltipHTML += `<div class="tooltip-property">${prop}</div>`;
        });
        tooltipHTML += `</div>`;
      }
      
      // Requirements section
      const reqProps = [];
      if (isValid(enhanced.wield_level)) reqProps.push(`Level Required: ${enhanced.wield_level}`);
      if (isValid(enhanced.skill_level)) reqProps.push(`Skill Level: ${enhanced.skill_level}`);
      if (enhanced.equip_skill_name) reqProps.push(`Skill: ${enhanced.equip_skill_name}`);
      if (isValid(enhanced.lore_requirement)) reqProps.push(`Lore: ${enhanced.lore_requirement}`);
      
      if (reqProps.length > 0) {
        tooltipHTML += `<div class="tooltip-section"><div class="tooltip-section-title">Requirements</div>`;
        reqProps.forEach(prop => {
          tooltipHTML += `<div class="tooltip-property">${prop}</div>`;
        });
        tooltipHTML += `</div>`;
      }
      
      // Enhancement section
      const enhanceProps = [];
      if (enhanced.material_name) enhanceProps.push(`Material: ${enhanced.material_name}`);
      if (enhanced.imbue) enhanceProps.push(`Imbue: ${enhanced.imbue}`);
      if (enhanced.item_set) enhanceProps.push(`Set: ${enhanced.item_set}`);
      if (isValid(enhanced.tinks)) enhanceProps.push(`Tinks: ${enhanced.tinks}`);
      // Use workmanship_text if available, otherwise numeric value
      if (enhanced.workmanship_text) {
        enhanceProps.push(`Workmanship: ${enhanced.workmanship_text}`);
      } else if (isValid(enhanced.workmanship)) {
        enhanceProps.push(`Workmanship: ${enhanced.workmanship.toFixed(1)}`);
      }
      
      if (enhanceProps.length > 0) {
        tooltipHTML += `<div class="tooltip-section"><div class="tooltip-section-title">Enhancements</div>`;
        enhanceProps.forEach(prop => {
          tooltipHTML += `<div class="tooltip-property">${prop}</div>`;
        });
        tooltipHTML += `</div>`;
      }
      
      // Ratings section
      const ratingProps = [];
      if (isValid(enhanced.damage_rating)) ratingProps.push(`Damage Rating: ${enhanced.damage_rating}`);
      if (isValid(enhanced.crit_rating)) ratingProps.push(`Crit Rating: ${enhanced.crit_rating}`);
      if (isValid(enhanced.heal_boost_rating)) ratingProps.push(`Heal Boost: ${enhanced.heal_boost_rating}`);
      
      if (ratingProps.length > 0) {
        tooltipHTML += `<div class="tooltip-section"><div class="tooltip-section-title">Ratings</div>`;
        ratingProps.forEach(prop => {
          tooltipHTML += `<div class="tooltip-property">${prop}</div>`;
        });
        tooltipHTML += `</div>`;
      }
      
      // Spells section (condensed list)
      if (enhanced.spells && enhanced.spells.spells && enhanced.spells.spells.length > 0) {
        const spellNames = enhanced.spells.spells.map(spell => spell.name).join(', ');
        tooltipHTML += `<div class="tooltip-section">`;
        tooltipHTML += `<div class="tooltip-property">Spells: ${spellNames}</div>`;
        tooltipHTML += `</div>`;
      }
      
      // Mana and Spellcraft section
      if (enhanced.mana_display || enhanced.spellcraft) {
        tooltipHTML += `<div class="tooltip-section">`;
        if (enhanced.spellcraft) {
          tooltipHTML += `<div class="tooltip-property">Spellcraft: ${enhanced.spellcraft}</div>`;
        }
        if (enhanced.mana_display) {
          tooltipHTML += `<div class="tooltip-property">Mana: ${enhanced.mana_display}</div>`;
        }
        tooltipHTML += `</div>`;
      }
      
      // Detailed Spell Descriptions section
      if (enhanced.spells && enhanced.spells.spells && enhanced.spells.spells.length > 0) {
        tooltipHTML += `<div class="tooltip-section"><div class="tooltip-section-title">Spell Descriptions</div>`;
        enhanced.spells.spells.forEach(spell => {
          tooltipHTML += `<div class="tooltip-spell">`;
          tooltipHTML += `<div class="spell-name">${spell.name}</div>`;
          if (spell.description) {
            tooltipHTML += `<div class="spell-description">${spell.description}</div>`;
          }
          tooltipHTML += `</div>`;
        });
        tooltipHTML += `</div>`;
      }
      
      // Object class info
      if (enhanced.object_class_name) {
        tooltipHTML += `<div class="tooltip-section">`;
        tooltipHTML += `<div class="tooltip-info">Type: ${enhanced.object_class_name}</div>`;
        tooltipHTML += `</div>`;
      }
      
      } // End of enhanced data check
      
    } catch (e) {
      console.warn('Failed to parse enhanced tooltip data', e);
    }
  }
  
  inventoryTooltip.innerHTML = tooltipHTML;
  
  // Position tooltip near cursor
  const x = e.clientX + 10;
  const y = e.clientY + 10;
  inventoryTooltip.style.left = `${x}px`;
  inventoryTooltip.style.top = `${y}px`;
  inventoryTooltip.style.display = 'block';
}

function hideInventoryTooltip() {
  if (inventoryTooltip) {
    inventoryTooltip.style.display = 'none';
  }
}


const applyTransform = () =>
  group.style.transform = `translate(${offX}px,${offY}px) scale(${scale})`;

function clampPan() {
  if (!imgW) return;
  const r = wrap.getBoundingClientRect();
  const vw = r.width, vh = r.height;
  const mw = imgW * scale, mh = imgH * scale;

  offX = mw <= vw ? (vw - mw) / 2 : Math.min(0, Math.max(vw - mw, offX));
  offY = mh <= vh ? (vh - mh) / 2 : Math.min(0, Math.max(vh - mh, offY));
}

function updateView() {
  clampPan();
  applyTransform();
  
  // Throttled heat map re-rendering during pan/zoom
  if (heatmapEnabled && heatmapData && !heatTimeout) {
    heatTimeout = setTimeout(() => {
      renderHeatmap();
      heatTimeout = null;
    }, HEAT_THROTTLE);
  }
}

function fitToWindow() {
  const r = wrap.getBoundingClientRect();
  scale = Math.min(r.width / imgW, r.height / imgH);
  minScale = scale;
  updateView();
}

/* ---------- tooltip handlers ------------------------------------ */
function showTooltip(evt, p) {
  tooltip.textContent = `${p.character_name} — Kills: ${p.kills} - Kills/h: ${p.kills_per_hour}`;
  const r = wrap.getBoundingClientRect();
  tooltip.style.left    = `${evt.clientX - r.left + 10}px`;
  tooltip.style.top     = `${evt.clientY - r.top  + 10}px`;
  tooltip.style.display = 'block';
}
function hideTooltip() {
  tooltip.style.display = 'none';
}

/* ---------- polling and initialization -------------------------- */
async function pollLive() {
  try {
    const [liveRes, trailsRes] = await Promise.all([
      fetch(`${API_BASE}/live/`),
      fetch(`${API_BASE}/trails/?seconds=600`),
    ]);
    const { players } = await liveRes.json();
    const { trails } = await trailsRes.json();
    currentPlayers = players;
    renderTrails(trails);
    renderList();
  } catch (e) {
    console.error('Live or trails fetch failed:', e);
  }
}

async function pollTotalRares() {
  try {
    const response = await fetch(`${API_BASE}/total-rares/`);
    const data = await response.json();
    updateTotalRaresDisplay(data);
  } catch (e) {
    console.error('Total rares fetch failed:', e);
  }
}

function updateTotalRaresDisplay(data) {
  const countElement = document.getElementById('totalRaresCount');
  if (countElement && data.all_time !== undefined && data.today !== undefined) {
    const allTimeFormatted = data.all_time.toLocaleString();
    const todayFormatted = data.today.toLocaleString();
    countElement.textContent = `${allTimeFormatted} (Today: ${todayFormatted})`;
  }
}

function startPolling() {
  if (pollID !== null) return;
  pollLive();
  pollTotalRares(); // Initial fetch
  pollID = setInterval(pollLive, POLL_MS);
  // Poll total rares every 5 minutes (300,000 ms)
  setInterval(pollTotalRares, 300000);
}

img.onload = () => {
  imgW = img.naturalWidth;
  imgH = img.naturalHeight;
  // size the SVG trails container to match the map dimensions
  if (trailsContainer) {
    trailsContainer.setAttribute('viewBox', `0 0 ${imgW} ${imgH}`);
    trailsContainer.setAttribute('width', `${imgW}`);
    trailsContainer.setAttribute('height', `${imgH}`);
  }
  fitToWindow();
  startPolling();
  initWebSocket();
  initHeatMap();
};

/* ---------- rendering sorted list & dots ------------------------ */
/**
 * Filter and sort the currentPlayers, then render them.
 */
function renderList() {
  // Filter by name prefix
  const filtered = currentPlayers.filter(p =>
    p.character_name.toLowerCase().startsWith(currentFilter)
  );
  // Sort filtered list
  const sorted = filtered.slice().sort(currentSort.comparator);
  render(sorted);
}

function render(players) {
  dots.innerHTML = '';
  list.innerHTML = '';

  // Update header with active player count
  const header = document.getElementById('activePlayersHeader');
  if (header) {
    header.textContent = `Active Mosswart Enjoyers (${players.length})`;
  }

  // Calculate and update server KPH
  const totalKPH = players.reduce((sum, p) => sum + (p.kills_per_hour || 0), 0);
  const kphElement = document.getElementById('serverKphCount');
  if (kphElement) {
    // Format with commas and one decimal place for EPIC display
    const formattedKPH = totalKPH.toLocaleString('en-US', { 
      minimumFractionDigits: 1, 
      maximumFractionDigits: 1 
    });
    kphElement.textContent = formattedKPH;
    
    // Add extra epic effect for high KPH
    const container = document.getElementById('serverKphCounter');
    if (container) {
      if (totalKPH > 5000) {
        container.classList.add('ultra-epic');
      } else {
        container.classList.remove('ultra-epic');
      }
    }
  }

  // Calculate and update total kills
  const totalKills = players.reduce((sum, p) => sum + (p.total_kills || 0), 0);
  const killsElement = document.getElementById('totalKillsCount');
  if (killsElement) {
    // Format with commas for readability
    const formattedKills = totalKills.toLocaleString();
    killsElement.textContent = formattedKills;
  }

  players.forEach(p => {
    const { x, y } = worldToPx(p.ew, p.ns);

    // dot
    const dot = document.createElement('div');
    dot.className = 'dot';
    dot.style.left      = `${x}px`;
    dot.style.top       = `${y}px`;
    dot.style.background = getColorFor(p.character_name);

    


    // custom tooltip
    dot.addEventListener('mouseenter', e => showTooltip(e, p));
    dot.addEventListener('mousemove',  e => showTooltip(e, p));
    dot.addEventListener('mouseleave', hideTooltip);

    // click to select/zoom
    dot.addEventListener('click', () => selectPlayer(p, x, y));

    if (p.character_name === selected) dot.classList.add('highlight');
    dots.appendChild(dot);
   //sidebar
    const li = document.createElement('li');
    const color = getColorFor(p.character_name);
    li.style.borderLeftColor = color;
    li.className = 'player-item';
    // Calculate KPR (Kills Per Rare)
    const totalKills = p.total_kills || 0;
    const totalRares = p.total_rares || 0;
    const kpr = totalRares > 0 ? Math.round(totalKills / totalRares) : '∞';
    
    li.innerHTML = `
    <span class="player-name">${p.character_name}${createVitaeIndicator(p.character_name)} <span class="coordinates-inline">${loc(p.ns, p.ew)}</span></span>
    ${createVitalsHTML(p.character_name)}
    <span class="stat kills">${p.kills}</span>
    <span class="stat total-kills">${p.total_kills || 0}</span>
    <span class="stat kph">${p.kills_per_hour}</span>
    <span class="stat rares">${p.session_rares}/${p.total_rares}</span>
    <span class="stat kpr">${kpr}</span>
    <span class="stat meta">${p.vt_state}</span>
    <span class="stat onlinetime">${p.onlinetime}</span>
    <span class="stat deaths">${p.deaths}/${p.total_deaths || 0}</span>
    <span class="stat tapers">${p.prismatic_taper_count || 0}</span>
  `;

    // Color the metastate pill according to its value
    const metaSpan = li.querySelector('.stat.meta');
    if (metaSpan) {
      const goodStates = ['default', 'default2', 'hunt', 'combat'];
      const state = (p.vt_state || '').toString().toLowerCase();
      if (goodStates.includes(state)) {
        metaSpan.classList.add('green');
      } else {
        metaSpan.classList.add('red');
      }
    }
  
    li.addEventListener('click', () => selectPlayer(p, x, y));
    if (p.character_name === selected) li.classList.add('selected');
    // Chat button
    const chatBtn = document.createElement('button');
    chatBtn.className = 'chat-btn';
    chatBtn.textContent = 'Chat';
    chatBtn.addEventListener('click', e => {
      e.stopPropagation();
      showChatWindow(p.character_name);
    });
    li.appendChild(chatBtn);
    // Stats button
    const statsBtn = document.createElement('button');
    statsBtn.className = 'stats-btn';
    statsBtn.textContent = 'Stats';
    statsBtn.addEventListener('click', e => {
      e.stopPropagation();
      showStatsWindow(p.character_name);
    });
    li.appendChild(statsBtn);
    // Inventory button
    const inventoryBtn = document.createElement('button');
    inventoryBtn.className = 'inventory-btn';
    inventoryBtn.textContent = 'Inventory';
    inventoryBtn.addEventListener('click', e => {
      e.stopPropagation();
      showInventoryWindow(p.character_name);
    });
    li.appendChild(inventoryBtn);
    list.appendChild(li);
  });
}

/* ---------- rendering trails ------------------------------- */
function renderTrails(trailData) {
  trailsContainer.innerHTML = '';
  const byChar = trailData.reduce((acc, pt) => {
    (acc[pt.character_name] = acc[pt.character_name] || []).push(pt);
    return acc;
  }, {});
  for (const [name, pts] of Object.entries(byChar)) {
    if (pts.length < 2) continue;
    const points = pts.map(pt => {
      const { x, y } = worldToPx(pt.ew, pt.ns);
      return `${x},${y}`;
    }).join(' ');
    const poly = document.createElementNS('http://www.w3.org/2000/svg', 'polyline');
    poly.setAttribute('points', points);
    // Use the same color as the player dot for consistency
    poly.setAttribute('stroke', getColorFor(name));
    poly.setAttribute('fill', 'none');
    poly.setAttribute('class', 'trail-path');
    trailsContainer.appendChild(poly);
  }
}
/* ---------- selection centering, focus zoom & blink ------------ */
function selectPlayer(p, x, y) {
  selected = p.character_name;
  // set focus zoom
  scale = Math.min(MAX_Z, Math.max(minScale, FOCUS_ZOOM));
  // center on the player
  const r = wrap.getBoundingClientRect();
  offX = r.width  / 2 - x * scale;
  offY = r.height / 2 - y * scale;
  updateView();
  renderList();  // keep sorted + highlight
}

/*
 * ---------- Chat & Command WebSocket Handlers ------------------
 * Maintains a persistent WebSocket connection to the /ws/live endpoint
 * for receiving chat messages and sending user commands to plugin clients.
 * Reconnects automatically on close and logs errors.
 */
// Initialize WebSocket for chat and command streams
function initWebSocket() {
  const protocol = location.protocol === 'https:' ? 'wss:' : 'ws:';
  const wsUrl = `${protocol}//${location.host}${API_BASE}/ws/live`;
  socket = new WebSocket(wsUrl);
  socket.addEventListener('message', evt => {
    let msg;
    try { msg = JSON.parse(evt.data); } catch { return; }
    if (msg.type === 'chat') {
      appendChatMessage(msg);
    } else if (msg.type === 'vitals') {
      updateVitalsDisplay(msg);
    } else if (msg.type === 'rare') {
      triggerEpicRareNotification(msg.character_name, msg.name);
    }
  });
  socket.addEventListener('close', () => setTimeout(initWebSocket, 2000));
  socket.addEventListener('error', e => console.error('WebSocket error:', e));
}

// Display or create a chat window for a character
function showChatWindow(name) {
  if (chatWindows[name]) {
    const existing = chatWindows[name];
    // Toggle: close if already visible, open if hidden
    if (existing.style.display === 'flex') {
      existing.style.display = 'none';
    } else {
      existing.style.display = 'flex';
      // Bring to front when opening
      if (!window.__chatZ) window.__chatZ = 10000;
      window.__chatZ += 1;
      existing.style.zIndex = window.__chatZ;
    }
    return;
  }
  const win = document.createElement('div');
  win.className = 'chat-window';
  win.dataset.character = name;
  // Header
  const header = document.createElement('div');
  header.className = 'chat-header';
  const title = document.createElement('span');
  title.textContent = `Chat: ${name}`;
  const closeBtn = document.createElement('button');
  closeBtn.className = 'chat-close-btn';
  closeBtn.textContent = '×';
  closeBtn.addEventListener('click', () => { win.style.display = 'none'; });
  header.appendChild(title);
  header.appendChild(closeBtn);
  win.appendChild(header);
  // Messages container
  const msgs = document.createElement('div');
  msgs.className = 'chat-messages';
  win.appendChild(msgs);
  // Input form
  const form = document.createElement('form');
  form.className = 'chat-form';
  const input = document.createElement('input');
  input.type = 'text';
  input.className = 'chat-input';
  input.placeholder = 'Enter chat...';
  form.appendChild(input);
  form.addEventListener('submit', e => {
    e.preventDefault();
    const text = input.value.trim();
    if (!text) return;
    // Send command envelope: player_name and command only
    socket.send(JSON.stringify({ player_name: name, command: text }));
    input.value = '';
  });
  win.appendChild(form);
  document.body.appendChild(win);
  chatWindows[name] = win;

  // Enable dragging using the global drag system
  makeDraggable(win, header);
}

// Append a chat message to the correct window
/**
 * Append a chat message to the correct window, optionally coloring the text.
 * msg: { type: 'chat', character_name, text, color? }
 */
function appendChatMessage(msg) {
  const { character_name: name, text, color } = msg;
  const win = chatWindows[name];
  if (!win) return;
  const msgs = win.querySelector('.chat-messages');
  const p = document.createElement('div');
  if (color !== undefined) {
    let c = color;
    if (typeof c === 'number') {
      // map numeric chat code to configured color, or fallback to raw hex
      if (CHAT_COLOR_MAP.hasOwnProperty(c)) {
        c = CHAT_COLOR_MAP[c];
      } else {
        c = '#' + c.toString(16).padStart(6, '0');
      }
    }
    p.style.color = c;
  }
  p.textContent = text;
  msgs.appendChild(p);
  // Enforce max number of lines in scrollback
  while (msgs.children.length > MAX_CHAT_LINES) {
    msgs.removeChild(msgs.firstChild);
  }
  // Scroll to bottom
  msgs.scrollTop = msgs.scrollHeight;
}

/* ---------- pan & zoom handlers -------------------------------- */
wrap.addEventListener('wheel', e => {
  e.preventDefault();
  if (!imgW) return;

  const r  = wrap.getBoundingClientRect();
  const mx = (e.clientX - r.left - offX) / scale;
  const my = (e.clientY - r.top  - offY) / scale;
  const factor = e.deltaY > 0 ? 0.9 : 1.1;
  let ns = scale * factor;
  ns = Math.max(minScale, Math.min(MAX_Z, ns));

  offX -= mx * (ns - scale);
  offY -= my * (ns - scale);
  scale = ns;
  updateView();
}, { passive: false });

wrap.addEventListener('mousedown', e => {
  dragging = true; sx = e.clientX; sy = e.clientY;
  wrap.classList.add('dragging');
});
window.addEventListener('mousemove', e => {
  if (!dragging) return;
  offX += e.clientX - sx; offY += e.clientY - sy;
  sx = e.clientX; sy = e.clientY;
  updateView();
});
window.addEventListener('mouseup', () => {
  dragging = false; wrap.classList.remove('dragging');
});

wrap.addEventListener('touchstart', e => {
  if (e.touches.length !== 1) return;
  dragging = true;
  sx = e.touches[0].clientX; sy = e.touches[0].clientY;
});
wrap.addEventListener('touchmove', e => {
  if (!dragging || e.touches.length !== 1) return;
  const t = e.touches[0];
  offX += t.clientX - sx; offY += t.clientY - sy;
  sx = t.clientX; sy = t.clientY;
  updateView();
});
wrap.addEventListener('touchend', () => {
  dragging = false;
});

/* ---------- coordinate display on hover ---------------------------- */
wrap.addEventListener('mousemove', e => {
  if (!imgW) return;
  
  const r = wrap.getBoundingClientRect();
  const x = e.clientX - r.left;
  const y = e.clientY - r.top;
  
  const { ew, ns } = pxToWorld(x, y);
  
  // Display coordinates using the same format as the existing loc function
  coordinates.textContent = loc(ns, ew);
  coordinates.style.left = `${x + 10}px`;
  coordinates.style.top = `${y + 10}px`;
  coordinates.style.display = 'block';
});

wrap.addEventListener('mouseleave', () => {
  coordinates.style.display = 'none';
});

/* ---------- vitals display functions ----------------------------- */
// Store vitals data per character
const characterVitals = {};

function updateVitalsDisplay(vitalsMsg) {
  // Store the vitals data for this character
  characterVitals[vitalsMsg.character_name] = {
    health_percentage: vitalsMsg.health_percentage,
    stamina_percentage: vitalsMsg.stamina_percentage,
    mana_percentage: vitalsMsg.mana_percentage,
    vitae: vitalsMsg.vitae
  };
  
  // Re-render the player list to update vitals in the UI
  renderList();
}

function createVitalsHTML(characterName) {
  const vitals = characterVitals[characterName];
  if (!vitals) {
    return ''; // No vitals data available
  }
  
  return `
    <div class="player-vitals">
      <div class="vital-bar-inline ${getVitalClass(vitals.health_percentage)}">
        <div class="vital-fill health" style="width: ${vitals.health_percentage}%"></div>
      </div>
      <div class="vital-bar-inline ${getVitalClass(vitals.stamina_percentage)}">
        <div class="vital-fill stamina" style="width: ${vitals.stamina_percentage}%"></div>
      </div>
      <div class="vital-bar-inline ${getVitalClass(vitals.mana_percentage)}">
        <div class="vital-fill mana" style="width: ${vitals.mana_percentage}%"></div>
      </div>
    </div>
  `;
}

function createVitaeIndicator(characterName) {
  const vitals = characterVitals[characterName];
  if (!vitals || !vitals.vitae || vitals.vitae >= 100) {
    return ''; // No vitae penalty
  }
  
  return `<span class="vitae-indicator">⚰️ ${vitals.vitae}%</span>`;
}

function getVitalClass(percentage) {
  if (percentage <= 25) {
    return 'critical-vital';
  } else if (percentage <= 50) {
    return 'low-vital';
  }
  return '';
}

/* ---------- epic rare notification system ------------------------ */
// Track previous rare count to detect increases
let lastRareCount = 0;
let notificationQueue = [];
let isShowingNotification = false;

function triggerEpicRareNotification(characterName, rareName) {
  // Add to queue
  notificationQueue.push({ characterName, rareName });
  
  // Process queue if not already showing a notification
  if (!isShowingNotification) {
    processNotificationQueue();
  }
  
  // Trigger fireworks immediately
  createFireworks();
  
  // Highlight the player in the list
  highlightRareFinder(characterName);
}

function processNotificationQueue() {
  if (notificationQueue.length === 0) {
    isShowingNotification = false;
    return;
  }
  
  isShowingNotification = true;
  const notification = notificationQueue.shift();
  
  // Create notification element
  const container = document.getElementById('rareNotifications');
  const notifEl = document.createElement('div');
  notifEl.className = 'rare-notification';
  notifEl.innerHTML = `
    <div class="rare-notification-title">🎆 LEGENDARY RARE! 🎆</div>
    <div class="rare-notification-mob">${notification.rareName}</div>
    <div class="rare-notification-finder">found by</div>
    <div class="rare-notification-character">⚔️ ${notification.characterName} ⚔️</div>
  `;
  
  container.appendChild(notifEl);
  
  // Remove notification after 6 seconds and process next
  setTimeout(() => {
    notifEl.style.animation = 'notification-slide-out 0.5s ease-in forwards';
    setTimeout(() => {
      notifEl.remove();
      processNotificationQueue();
    }, 500);
  }, 6000);
}

// Add slide out animation
const style = document.createElement('style');
style.textContent = `
  @keyframes notification-slide-out {
    to {
      transform: translateY(-100px);
      opacity: 0;
    }
  }
`;
document.head.appendChild(style);

function createFireworks() {
  const container = document.getElementById('fireworksContainer');
  const rareCounter = document.getElementById('totalRaresCounter');
  const rect = rareCounter.getBoundingClientRect();
  
  // Create 30 particles
  const particleCount = 30;
  const colors = ['particle-gold', 'particle-red', 'particle-orange', 'particle-purple', 'particle-blue'];
  
  for (let i = 0; i < particleCount; i++) {
    const particle = document.createElement('div');
    particle.className = `firework-particle ${colors[Math.floor(Math.random() * colors.length)]}`;
    
    // Start position at rare counter
    particle.style.left = `${rect.left + rect.width / 2}px`;
    particle.style.top = `${rect.top + rect.height / 2}px`;
    
    // Random explosion direction
    const angle = (Math.PI * 2 * i) / particleCount + (Math.random() - 0.5) * 0.5;
    const velocity = 100 + Math.random() * 200;
    const dx = Math.cos(angle) * velocity;
    const dy = Math.sin(angle) * velocity - 50; // Slight upward bias
    
    // Create custom animation for this particle
    const animName = `particle-${Date.now()}-${i}`;
    const keyframes = `
      @keyframes ${animName} {
        0% {
          transform: translate(0, 0) scale(1);
          opacity: 1;
        }
        100% {
          transform: translate(${dx}px, ${dy + 200}px) scale(0);
          opacity: 0;
        }
      }
    `;
    
    const styleEl = document.createElement('style');
    styleEl.textContent = keyframes;
    document.head.appendChild(styleEl);
    
    particle.style.animation = `${animName} 2s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards`;
    
    container.appendChild(particle);
    
    // Clean up particle and animation after completion
    setTimeout(() => {
      particle.remove();
      styleEl.remove();
    }, 2000);
  }
}

function highlightRareFinder(characterName) {
  // Find the player in the list
  const playerItems = document.querySelectorAll('#playerList li');
  playerItems.forEach(item => {
    const nameSpan = item.querySelector('.player-name');
    if (nameSpan && nameSpan.textContent.includes(characterName)) {
      item.classList.add('rare-finder-glow');
      // Remove glow after 5 seconds
      setTimeout(() => {
        item.classList.remove('rare-finder-glow');
      }, 5000);
    }
  });
}

// Update total rares display to trigger fireworks on increase
const originalUpdateTotalRaresDisplay = updateTotalRaresDisplay;
updateTotalRaresDisplay = function(data) {
  originalUpdateTotalRaresDisplay(data);
  
  // Check if total increased
  const newTotal = data.all_time || 0;
  if (newTotal > lastRareCount && lastRareCount > 0) {
    // Don't trigger on initial load
    createFireworks();
    
    // Check for milestones when count increases
    if (newTotal > 0 && newTotal % 100 === 0) {
      triggerMilestoneCelebration(newTotal);
    }
  }
  lastRareCount = newTotal;
}

function triggerMilestoneCelebration(rareNumber) {
  console.log(`🏆 MILESTONE: Rare #${rareNumber}! 🏆`);
  
  // Create full-screen milestone overlay
  const overlay = document.createElement('div');
  overlay.className = 'milestone-overlay';
  
  overlay.innerHTML = `
    <div class="milestone-content">
      <div class="milestone-number">#${rareNumber}</div>
      <div class="milestone-text">🏆 EPIC MILESTONE! 🏆</div>
      <div class="milestone-subtitle">Server Achievement Unlocked</div>
    </div>
  `;
  
  document.body.appendChild(overlay);
  
  // Add screen shake effect
  document.body.classList.add('screen-shake');
  
  // Create massive firework explosion
  createMilestoneFireworks();
  
  // Remove milestone overlay after 5 seconds
  setTimeout(() => {
    overlay.style.animation = 'milestone-fade-in 0.5s ease-out reverse';
    document.body.classList.remove('screen-shake');
    setTimeout(() => {
      overlay.remove();
    }, 500);
  }, 5000);
}

function createMilestoneFireworks() {
  const container = document.getElementById('fireworksContainer');
  
  // Create multiple bursts across the screen
  const burstCount = 5;
  const particlesPerBurst = 50;
  const colors = ['#ffd700', '#ff6600', '#ff0044', '#cc00ff', '#00ccff', '#00ff00'];
  
  for (let burst = 0; burst < burstCount; burst++) {
    setTimeout(() => {
      // Random position for each burst
      const x = Math.random() * window.innerWidth;
      const y = Math.random() * (window.innerHeight * 0.7) + (window.innerHeight * 0.15);
      
      for (let i = 0; i < particlesPerBurst; i++) {
        const particle = document.createElement('div');
        particle.className = 'milestone-particle';
        particle.style.background = colors[Math.floor(Math.random() * colors.length)];
        particle.style.boxShadow = `0 0 12px ${particle.style.background}`;
        
        // Start position
        particle.style.left = `${x}px`;
        particle.style.top = `${y}px`;
        
        // Random explosion direction
        const angle = (Math.PI * 2 * i) / particlesPerBurst + (Math.random() - 0.5) * 0.8;
        const velocity = 200 + Math.random() * 300;
        const dx = Math.cos(angle) * velocity;
        const dy = Math.sin(angle) * velocity - 100; // Upward bias
        
        // Create custom animation
        const animName = `milestone-particle-${Date.now()}-${burst}-${i}`;
        const keyframes = `
          @keyframes ${animName} {
            0% {
              transform: translate(0, 0) scale(1);
              opacity: 1;
            }
            100% {
              transform: translate(${dx}px, ${dy + 400}px) scale(0);
              opacity: 0;
            }
          }
        `;
        
        const styleEl = document.createElement('style');
        styleEl.textContent = keyframes;
        document.head.appendChild(styleEl);
        
        particle.style.animation = `${animName} 3s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards`;
        
        container.appendChild(particle);
        
        // Clean up
        setTimeout(() => {
          particle.remove();
          styleEl.remove();
        }, 3000);
      }
    }, burst * 200); // Stagger bursts
  }
}

/* ==================== INVENTORY SEARCH FUNCTIONALITY ==================== */

/**
 * Opens the dedicated inventory search page in a new browser tab.
 */
function openInventorySearch() {
  // Open the dedicated inventory search page in a new tab
  window.open('/inventory.html', '_blank');
}