(function(){
  'use strict';
  var path = location.pathname;
  var inMerchant = /^\/merchant(?:\/|$)/.test(path)
    || path.indexOf('/merchant-h5') === 0
    || path.indexOf('/package/merchant/') === 0
    || path.indexOf('/package/merchant-h5/') === 0;
  if (!inMerchant) return;
  if (/\/login(?:\.html)?(?:\/|$)/.test(path)) return;
  if (window.top !== window) return;
  if (document.getElementById('kf-ball')) return;

  var WORK_URL = "https://shop.yuqk.cc/plugin/Kefu/Api/index";
  var NOTICE_URL = "https://shop.yuqk.cc/plugin/Kefu/Api/notice";
  var POLL_MS = 10000;
  var LS_BASE = 'kf_dash_';

  var baseline = parseInt(localStorage.getItem(LS_BASE + 'newid') || '0', 10) || 0;
  var firstFrame = true;
  var lastUnread = 0;
  var soundOn = true;
  var blinkTimer = null;
  var docTitle = document.title;
  var ac = null;
  var lastNoreplyBeep = 0;

  // ===== 悬浮球 =====
  var style = document.createElement('style');
  style.textContent =
    '#kf-ball{position:fixed;z-index:2147483000;right:14px;bottom:96px;width:52px;height:52px;border-radius:17px;'
    + 'background:linear-gradient(135deg,#f5933c,#f45853);box-shadow:0 8px 22px rgba(244,88,83,.38);'
    + 'cursor:pointer;user-select:none;-webkit-user-select:none;touch-action:none;display:none;'
    + 'transition:transform .15s;}'
    + '#kf-ball:active{transform:scale(.92);}'
    + '#kf-ball svg{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:27px;height:27px;}'
    + '#kf-ball .kf-bd{position:absolute;top:-6px;right:-6px;min-width:20px;height:20px;padding:0 6px;'
    + 'border-radius:11px;background:#ff3b30;color:#fff;font-size:11.5px;font-weight:700;line-height:20px;'
    + 'text-align:center;border:2px solid #fff;box-sizing:border-box;}'
    + '@keyframes kfShake{0%,100%{transform:rotate(0)}20%{transform:rotate(-9deg)}40%{transform:rotate(8deg)}'
    + '60%{transform:rotate(-6deg)}80%{transform:rotate(4deg)}}'
    + '#kf-ball.kf-shake{animation:kfShake .7s ease;}'
    + '@keyframes kfPulse{0%{box-shadow:0 0 0 0 rgba(255,125,0,.55)}70%{box-shadow:0 0 0 16px rgba(255,125,0,0)}100%{box-shadow:0 0 0 0 rgba(255,125,0,0)}}'
    + '#kf-ball.kf-noreply{animation:kfPulse 1.8s infinite;background:linear-gradient(135deg,#ff9a4d,#ff7d00);box-shadow:0 8px 22px rgba(255,125,0,.42);}';
  document.head.appendChild(style);

  var ball = document.createElement('div');
  ball.id = 'kf-ball';
  ball.innerHTML =
    '<svg viewBox="0 0 24 24" fill="none"><path d="M5 13v-2a7 7 0 0 1 14 0v2" stroke="#fff" stroke-width="1.9" fill="none" stroke-linecap="round"/>'
    + '<rect x="3" y="12" width="4.2" height="6.4" rx="2" fill="#fff"/><rect x="16.8" y="12" width="4.2" height="6.4" rx="2" fill="#fff"/>'
    + '<path d="M16 18v1a2.6 2.6 0 0 1-5.2 0" stroke="#fff" stroke-width="1.6" fill="none" stroke-linecap="round"/></svg>'
    + '<span class="kf-bd" id="kf-bd" style="display:none"></span>';
  ball.onclick = function(){ window.open(WORK_URL, '_blank'); };
  document.body.appendChild(ball);

  function ensureAudio(){
    if (!ac) { try { ac = new (window.AudioContext || window.webkitAudioContext)(); } catch(e){} }
    if (ac && ac.state === 'suspended') { ac.resume(); }
    if ('speechSynthesis' in window) { try { window.speechSynthesis.resume(); } catch(e){} }
  }
  document.addEventListener('touchstart', ensureAudio, { passive: true });
  document.addEventListener('click', ensureAudio, { passive: true });
  if ('speechSynthesis' in window) {
    try {
      if (!window.speechSynthesis.getVoices().length) {
        window.speechSynthesis.onvoiceschanged = function(){ window.speechSynthesis.getVoices(); };
      }
    } catch(e){}
  }

  // 通用通知音：门铃双音（G5→C6），dur 0.25s，vol 0.5
  function beep(times,opts){
    if (!soundOn) return;
    ensureAudio(); if (!ac) return;
    opts=opts||{};
    var freqs=opts.freqs||[784,1047], gap=opts.gap!=null?opts.gap:230, dur=opts.dur||0.25, vol=opts.vol!=null?opts.vol:0.5, type=opts.type||'sine';
    for (var t=0;t<times;t++){
      (function(i){
        setTimeout(function(){
          var o=ac.createOscillator(),g=ac.createGain();
          o.type=type; o.frequency.value=freqs[i%freqs.length];
          g.gain.setValueAtTime(0.0001, ac.currentTime);
          g.gain.exponentialRampToValueAtTime(vol, ac.currentTime+0.02);
          g.gain.exponentialRampToValueAtTime(0.0001, ac.currentTime+dur);
          o.connect(g); g.connect(ac.destination);
          o.start(); o.stop(ac.currentTime+dur+0.03);
        }, i*gap);
      })(t);
    }
  }
  function speakNew(){
    beep(3,{gap:180,dur:0.28,freqs:[1047,1319,1568],vol:0.55,type:'triangle'});
    try {
      if ('Notification' in window) {
        if (Notification.permission === 'granted') {
          var n = new Notification('新买家咨询',{ body:'您有新买家进行咨询，请及时回复', tag:'kf-new', silent:true });
          setTimeout(function(){ try { n.close(); } catch(e){} }, 6000);
        } else if (Notification.permission !== 'denied') {
          Notification.requestPermission();
        }
      }
    } catch(e){}
  }

  function stopBlink(){
    if (blinkTimer) { clearInterval(blinkTimer); blinkTimer=null; }
    document.title = docTitle;
  }
  function startBlink(text){
    stopBlink();
    var on=false;
    blinkTimer=setInterval(function(){
      on=!on; document.title = on ? text : docTitle;
    }, 1100);
  }
  document.addEventListener('visibilitychange', function(){
    if (!document.hidden) stopBlink();
  });
  window.addEventListener('focus', stopBlink);
  document.addEventListener('click', function(){ if (document.hasFocus && document.hasFocus()) stopBlink(); }, true);

  function poll(){
    fetch(NOTICE_URL, { credentials:'same-origin' })
      .then(function(r){ return r.json(); })
      .then(function(j){
        if (!j || j.code !== 1 || !j.data) return;
        var d = j.data;
        soundOn = !!d.sound_on;
        var unread = parseInt(d.unread,10)||0;
        var waiting = d.waiting || [];

        var bd = document.getElementById('kf-bd');
        var hasUnread = unread > 0;
        var hasNoreply = parseInt(d.noreply,10) > 0;
        if (hasUnread || hasNoreply) {
          ball.style.display = 'block';
          bd.style.display = 'block';
          if (hasUnread) {
            bd.textContent = unread > 99 ? '99+' : String(unread);
            bd.style.background = ''; bd.style.color = '';
            ball.classList.remove('kf-noreply');
          } else {
            // 只有已读未回复没有新未读：角标换橙色 + 悬浮球加提醒色环
            bd.textContent = d.noreply > 9 ? '9+' : String(d.noreply);
            bd.style.background = '#ff7d00'; bd.style.color = '#fff';
            ball.classList.add('kf-noreply');
          }
        } else {
          ball.style.display = 'none';
          ball.classList.remove('kf-noreply');
        }

        // 新咨询：取待接待会话最大 id 作为基线，出现更大 id 的新会话即播报（每会话仅一次）
        var maxId = baseline;
        waiting.forEach(function(w){ if (w.id > maxId) maxId = w.id; });
        if (firstFrame) {
          firstFrame = false;
        } else {
          var fresh = waiting.filter(function(w){ return w.id > baseline; });
          if (fresh.length) {
            speakNew(); ball.classList.remove('kf-shake');
            void ball.offsetWidth; ball.classList.add('kf-shake');
            if (document.hidden || !document.hasFocus()) startBlink('【新买家咨询】' + (fresh[0].name||'该买家'));
          } else if (unread > lastUnread) {
            beep(1);
            if (document.hidden || !document.hasFocus()) startBlink('【' + unread + '条未读】在线客服');
          } else if (parseInt(d.noreply,10) > 0 && Date.now() - lastNoreplyBeep >= 30000) {
            lastNoreplyBeep = Date.now();
            beep(2);
            if (document.hidden || !document.hasFocus()) startBlink('【有买家等待回复】在线客服');
          }
        }
        if (maxId > baseline) baseline = maxId;
        localStorage.setItem(LS_BASE + 'newid', String(baseline));
        lastUnread = unread;
      })
      .catch(function(){})
      .finally(function(){ setTimeout(poll, POLL_MS); });
  }
  poll();
})();