/* ---------- 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');

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

/* ---------- constants ------------------------------------------- */
const MAX_Z       = 10;
const FOCUS_ZOOM  = 3;       // zoom level when you click a name
const POLL_MS     = 2000;
const MAP_BOUNDS  = {
  west : -102.04,
  east :  102.19,
  north:  102.16,
  south: -102.00
};

// Base path for tracker API endpoints; prefix API calls with '/api' when served behind a proxy
const API_BASE = '/api';
// 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
};

/* ---------- 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: "Kills ↓",
    comparator: (a, b) => b.kills - a.kills
  },
  {
    value: "rares",
    label: "Rares ↓",
    comparator: (a, b) => (b.rares_found || 0) - (a.rares_found || 0)
  }
];

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 };
}

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();
}

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);
  }
}

function startPolling() {
  if (pollID !== null) return;
  pollLive();
  pollID = setInterval(pollLive, POLL_MS);
}

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();
};

/* ---------- rendering sorted list & dots ------------------------ */
function renderList() {
  const sorted = [...currentPlayers].sort(currentSort.comparator);
  render(sorted);
}

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

  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 = hue(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 = hue(p.character_name);
    li.style.borderLeftColor = color;
    li.className = 'player-item';
    li.innerHTML = `
    <span class="player-name">${p.character_name}</span>
    <span class="player-loc">${loc(p.ns, p.ew)}</span>
    <span class="stat kills">${p.kills}</span>
    <span class="stat kph">${p.kills_per_hour}</span>
    <span class="stat rares">${p.rares_found}</span>
    <span class="stat meta">${p.vt_state}</span>
    <span class="stat onlinetime">${p.onlinetime}</span>
    <span class="stat deaths">${p.deaths}</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);
    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);
    poly.setAttribute('stroke', hue(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 handlers ---------------------------- */
// Initialize WebSocket for chat and commands
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);
    }
  });
  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]) {
    // Restore flex layout when reopening & bring to front
    const existing = chatWindows[name];
    existing.style.display = 'flex';
    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 of the chat window via its header element */
  /* --------------------------------------------------------- */

  // keep a static counter so newer windows can be brought to front
  if (!window.__chatZ) window.__chatZ = 10000;

  let drag = false;
  let startX = 0, startY = 0;
  let startLeft = 0, startTop = 0;

  header.style.cursor = 'move';

  // bring to front when interacting
  const bringToFront = () => {
    window.__chatZ += 1;
    win.style.zIndex = window.__chatZ;
  };

  header.addEventListener('mousedown', e => {
    // don't initiate drag when pressing the close button (or other clickable controls)
    if (e.target.closest('button')) return;
    e.preventDefault();
    drag = true;
    bringToFront();
    startX = e.clientX;
    startY = e.clientY;
    // current absolute position
    startLeft = win.offsetLeft;
    startTop  = win.offsetTop;
    document.body.classList.add('noselect');
  });

  window.addEventListener('mousemove', e => {
    if (!drag) return;
    const dx = e.clientX - startX;
    const dy = e.clientY - startY;
    win.style.left = `${startLeft + dx}px`;
    win.style.top  = `${startTop  + dy}px`;
  });

  window.addEventListener('mouseup', () => {
    drag = false;
    document.body.classList.remove('noselect');
  });

  /* touch support */
  header.addEventListener('touchstart', e => {
    if (e.touches.length !== 1 || e.target.closest('button')) return;
    drag = true;
    bringToFront();
    const t = e.touches[0];
    startX = t.clientX;
    startY = t.clientY;
    startLeft = win.offsetLeft;
    startTop  = win.offsetTop;
  });

  window.addEventListener('touchmove', e => {
    if (!drag || e.touches.length !== 1) return;
    const t = e.touches[0];
    const dx = t.clientX - startX;
    const dy = t.clientY - startY;
    win.style.left = `${startLeft + dx}px`;
    win.style.top  = `${startTop  + dy}px`;
  });

  window.addEventListener('touchend', () => {
    drag = false;
  });
}

// 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;
});
