// AI 控制台（顶级 Tab）：DeepSeek 风格聊天 + 流式输出 + 实时 MCP 步骤
let _agentBusy = false;
let _agentStream = null;      // EventSource
let _agentCfgLoaded = false;

// ================== 初始化 ==================
function initAgentChat(){
  if(_agentCfgLoaded)return;
  _agentCfgLoaded = true;
  loadAgentConfig();
  const chat = document.getElementById('agent-chat');
  if(chat && !chat.children.length){
    chat.innerHTML = '<div class="agent-empty">👋 给 AI 下达指令，它将通过截图观察手机并执行操作。<br>'
      + '例如：「打开抖音搜索奚学东，告诉我第一个视频的标题」<br>'
      + '点击右上角 ⚙ 配置模型与 API Key。</div>';
  }
  bindChatScroll();
  loadLiveDevices();
  // 输入框快捷键
  const inp = document.getElementById('agent-input');
  inp.addEventListener('keydown', ev=>{
    if(ev.key==='Enter' && !ev.shiftKey){
      ev.preventDefault();
      if(!_agentBusy) sendAgentMsg();
    }
  });
}

// ================== 配置 ==================
function loadAgentConfig(){
  apiGet('/api/agent/config').then(r=>{
    if(!r||!r.ok)return;
    const tag = document.getElementById('agent-model-tag');
    if(tag && r.model) tag.textContent = r.model;
  });
}
function openAgentConfig(){
  apiGet('/api/agent/config').then(r=>{
    if(!r||!r.ok)return;
    document.getElementById('acfg-base').value = r.api_base || 'https://api.deepseek.com';
    document.getElementById('acfg-model').value = r.model || '';
    document.getElementById('acfg-serial').value = r.default_serial || '';
    document.getElementById('acfg-key-hint').textContent =
      r.api_key_masked ? ('已配置 ' + r.api_key_masked) : '未配置';
    document.getElementById('acfg-key').value = '';
    document.getElementById('agent-cfg-overlay').style.display = 'flex';
  });
}
function closeAgentConfig(){
  document.getElementById('agent-cfg-overlay').style.display = 'none';
}
function saveAgentConfig(){
  const body = {
    api_base: document.getElementById('acfg-base').value.trim(),
    model: document.getElementById('acfg-model').value.trim(),
    default_serial: document.getElementById('acfg-serial').value.trim(),
  };
  const key = document.getElementById('acfg-key').value.trim();
  if(key) body.api_key = key;
  apiPost('/api/agent/config', body).then(r=>{
    if(r&&r.ok){
      showToast('配置已保存','success');
      closeAgentConfig();
      loadAgentConfig();
    }else showToast('保存失败: ' + ((r&&r.error)||''),'error');
  });
}

// ================== 聊天渲染 ==================
function addUserMsg(text){
  const chat = document.getElementById('agent-chat');
  clearEmpty();
  const div = document.createElement('div');
  div.className = 'agent-msg user';
  div.textContent = text;
  chat.appendChild(div);
  scrollChat();
}
function newAssistantMsg(){
  const chat = document.getElementById('agent-chat');
  clearEmpty();
  const div = document.createElement('div');
  div.className = 'agent-msg assistant';
  div.innerHTML = '<div class="agent-toolcards"></div><div class="agent-text"></div>';
  chat.appendChild(div);
  scrollChat();
  return div;
}
function clearEmpty(){
  const empty = document.querySelector('#agent-chat .agent-empty');
  if(empty) empty.remove();
}
let _chatPinned = true;   // 用户是否在底部（贴底才自动跟随滚动）
function scrollChat(force){
  const chat = document.getElementById('agent-chat');
  if(force || _chatPinned){
    chat.scrollTop = chat.scrollHeight;
  }
}
function bindChatScroll(){
  const chat = document.getElementById('agent-chat');
  chat.addEventListener('scroll', ()=>{
    _chatPinned = chat.scrollHeight - chat.scrollTop - chat.clientHeight < 60;
  });
}
function clearAgentChat(){
  document.getElementById('agent-chat').innerHTML =
    '<div class="agent-empty">对话已清空。给 AI 下达新指令…</div>';
}
// 新建会话：清后端历史 + 清前端对话区（像 DeepSeek 的新建会话）
function newAgentSession(){
  if(_agentBusy){showToast('运行中不能新建会话','error');return;}
  if(!confirm('新建会话将清空当前对话历史，确定？'))return;
  apiPost('/api/agent/clear',{}).then(r=>{
    if(r&&r.ok){
      clearAgentChat();
      showToast('已新建会话','success');
    }else showToast('操作失败','error');
  });
}

// ================== 发送与流式接收 ==================
function setRunning(on){
  _agentBusy = on;
  document.getElementById('agent-running-tag').style.display = on ? 'inline' : 'none';
  document.getElementById('btn-agent-stop').style.display = on ? 'inline-block' : 'none';
  document.getElementById('btn-agent-send').disabled = on;
}
function stopAgent(){
  apiPost('/api/agent/stop',{}).then(r=>{
    if(r&&r.ok) showToast('已请求停止，正在中断…','success');
    else showToast((r&&r.error)||'停止失败','error');
  });
}
function sendAgentMsg(){
  if(_agentBusy){showToast('上一轮还在运行','error');return;}
  const inp = document.getElementById('agent-input');
  const text = inp.value.trim();
  if(!text){showToast('请输入指令','error');return;}
  inp.value = '';
  addUserMsg(text);

  apiPost('/api/agent/run', {prompt: text}).then(r=>{
    if(!r||!r.ok){
      const msg = r ? (r.error||'启动失败') : '请求失败';
      const div = newAssistantMsg();
      div.querySelector('.agent-text').textContent = '⚠ ' + msg;
      showToast(msg,'error');
      return;
    }
    setRunning(true);
    listenStream(r.run_id);
  });
}

function listenStream(runId){
  if(_agentStream) _agentStream.close();
  const es = new EventSource('/api/agent/stream?run_id=' + runId);
  _agentStream = es;
  let msgEl = null;

  es.addEventListener('delta', ev=>{
    if(!msgEl) msgEl = newAssistantMsg();
    const d = JSON.parse(ev.data);
    const textEl = msgEl.querySelector('.agent-text');
    if(d.kind === 'reasoning'){
      let r = msgEl.querySelector('.reasoning');
      if(!r){
        r = document.createElement('div');
        r.className = 'reasoning';
        msgEl.insertBefore(r, textEl);
      }
      r.textContent += d.text;
    }else{
      textEl.textContent += d.text;
    }
    scrollChat();
  });

  es.addEventListener('step', ev=>{
    const d = JSON.parse(ev.data);
    followSerialFromArgs(d.args);
    if(!msgEl) msgEl = newAssistantMsg();
    const cards = msgEl.querySelector('.agent-toolcards');
    const card = document.createElement('div');
    card.className = 'agent-toolcard';
    card.innerHTML = '<span class="dot"></span>'
      + '<code style="color:var(--teal)">' + esc(d.tool||'') + '</code>'
      + '<span class="text-muted">' + esc(d.args||'') + '</span>';
    if(d.image){
      const img = document.createElement('img');
      img.src = 'data:image/jpeg;base64,' + d.image;
      card.appendChild(img);
    }
    cards.appendChild(card);
    scrollChat();
  });

  es.addEventListener('done', ev=>{
    const d = JSON.parse(ev.data);
    if(d.answer){
      if(!msgEl) msgEl = newAssistantMsg();
      msgEl.querySelector('.agent-text').textContent = d.answer;
    }
    endRun();
  });

  es.addEventListener('error', ev=>{
    let msg = '连接中断';
    try{
      if(ev.data) msg = JSON.parse(ev.data).message || msg;
    }catch(e){}
    if(!msgEl) msgEl = newAssistantMsg();
    msgEl.querySelector('.agent-text').textContent = '⚠ ' + msg;
    endRun();
  });

  es.onerror = ()=>{
    // 事件流正常结束（done 后服务器关流）会触发一次 error——done 已处理则忽略
    if(_agentBusy) endRun();
  };
}

// ============ 实时画面（右侧，MJPEG 流） ============
let _liveSerial = '';
function showLive(serial){
  if(!serial || serial === _liveSerial) return;
  _liveSerial = serial;
  const img = document.getElementById('agent-live-img');
  img.src = '/api/screen/stream?serial=' + encodeURIComponent(serial) + '&q=80&fps=8&t=' + Date.now();
  img.style.display = 'block';
  document.getElementById('agent-live-empty').style.display = 'none';
  document.getElementById('agent-live-serial').textContent = serial;
  const sel = document.getElementById('agent-live-select');
  if(sel) sel.value = serial;
}
function stopLive(){
  _liveSerial = '';
  const img = document.getElementById('agent-live-img');
  img.src = '';
  img.style.display = 'none';
  document.getElementById('agent-live-empty').style.display = 'block';
  document.getElementById('agent-live-serial').textContent = '';
}
function followSerialFromArgs(argsStr){
  try{
    const a = JSON.parse(argsStr || '{}');
    if(a.serial) showLive(a.serial);
  }catch(e){}
}
function watchDevice(serial){
  if(!serial){ stopLive(); return; }
  showLive(serial);
}
function loadLiveDevices(){
  apiGet('/api/devices').then(r=>{
    if(!r||!r.ok)return;
    const sel = document.getElementById('agent-live-select');
    if(!sel)return;
    const cur = sel.value;
    const devs = (r.devices||[]).filter(x=>x.indexOf(':')>=0);
    sel.innerHTML = '<option value="">选择设备观看…</option>'
      + devs.map(s=>'<option value="'+esc(s)+'"'+(s===cur?' selected':'')+'>'+esc(s)+'</option>').join('');
  });
}

// 截图点击放大查看
function zoomScreenshot(img){
  const ov = document.getElementById('agent-zoom');
  if(!ov){
    const d = document.createElement('div');
    d.id = 'agent-zoom';
    d.style.cssText = 'display:none;position:fixed;inset:0;background:rgba(0,0,0,.8);z-index:1400;align-items:center;justify-content:center;cursor:zoom-out';
    d.onclick = ()=>d.style.display='none';
    document.body.appendChild(d);
  }
  const ovEl = document.getElementById('agent-zoom');
  ovEl.innerHTML = '';
  const big = document.createElement('img');
  big.src = img.src;
  big.style.cssText = 'max-width:88vw;max-height:88vh;border-radius:8px';
  ovEl.appendChild(big);
  ovEl.style.display = 'flex';
}
// 截图 img 绑定点击放大
document.addEventListener('click', ev=>{
  const t = ev.target;
  if(t && t.tagName==='IMG' && t.closest('.agent-toolcard') && !t.closest('#agent-zoom')){
    zoomScreenshot(t);
  }
});

function endRun(){
  setRunning(false);
  _agentStream && _agentStream.close();
  _agentStream = null;
  scrollChat();
}

// ================== 经验库（自进化记忆管理） ==================
function openExpLib(){
  document.getElementById('agent-exp-overlay').style.display = 'flex';
  loadExpLib();
}
function closeExpLib(){
  document.getElementById('agent-exp-overlay').style.display = 'none';
}
function loadExpLib(){
  const list = document.getElementById('exp-lib-list');
  apiGet('/api/agent/experience').then(r=>{
    if(!r||!r.ok){ showToast((r&&r.error)||'加载失败','error'); return; }
    document.getElementById('exp-lib-last').textContent =
      (r.last ? ('最近巡检 ' + r.last + '：' + (r.last_summary||'')) : '');
    if(r.running){
      list.innerHTML = '<div class="text-muted" style="padding:20px;text-align:center">🔍 AI 巡检进行中（约 1 分钟），完成后请刷新…</div>';
      return;
    }
    const exps = r.experiences||[];
    if(!exps.length){
      list.innerHTML = '<div class="text-muted" style="padding:20px;text-align:center">暂无经验——跑一轮带手机操作的任务后会自动沉淀</div>';
      return;
    }
    list.innerHTML = '';
    exps.forEach(e=>{
      const a = e.audit||{};
      const card = document.createElement('div');
      card.style.cssText = 'border:1px solid var(--card-line);border-radius:10px;padding:9px 13px;background:#0d1117';
      // 徽章
      let badge = '';
      if(a.action === 'pending' && a.verdict === 'delete'){
        badge = '<span style="background:#7f1d1d;color:#fecaca;font-size:10.5px;padding:1px 8px;border-radius:9px;margin-left:8px">⚠ 建议删除</span>';
      }else if(a.action === 'kept'){
        badge = '<span style="background:#0f3d2e;color:#a7f3d0;font-size:10.5px;padding:1px 8px;border-radius:9px;margin-left:8px">' +
                (a.verdict === 'delete' ? '已人工保留' : '✓ 已保留') + '</span>';
      }
      let actBtns = '';
      if(a.action === 'pending'){
        actBtns = '<button class="btn btn-xs btn-danger" onclick="expDelete(' + e.id + ')">确认删除</button>'
                + '<button class="btn btn-xs" onclick="expKeep(' + e.id + ')">保留</button>';
      }else{
        actBtns = '<button class="btn btn-xs" style="border-color:#7f1d1d;color:#f87171" onclick="expDelete(' + e.id + ')" title="强制删除此经验">删除</button>';
      }
      card.innerHTML =
        '<div style="display:flex;align-items:center;gap:6px;font-size:12px">'
        + '<span class="text-muted" style="font-family:var(--mono)">#' + e.id + '</span>'
        + '<span class="text-muted">' + esc(e.created_at||'') + '</span>'
        + '<span class="text-muted">引用 ' + (e.hits||0) + ' 次</span>' + badge
        + '<span style="flex:1"></span>' + actBtns + '</div>'
        + '<div style="font-size:13px;color:#e5e7eb;margin:5px 0 3px">' + esc(e.task_prompt) + '</div>'
        + '<div class="text-muted" style="font-size:11.5px;line-height:1.6;white-space:pre-wrap">' + esc((e.recipe||'').slice(0,220)) + '</div>'
        + (a.action === 'pending' && a.reason
           ? '<div style="font-size:11.5px;color:#fbbf24;margin-top:5px">AI 建议理由：' + esc(a.reason)
             + (a.score ? '（评分 ' + a.score + '/10）' : '') + '</div>'
           : '');
      list.appendChild(card);
    });
  });
}
function triggerExpAudit(){
  apiPost('/api/agent/experience/audit',{}).then(r=>{
    if(r&&r.ok){
      showToast('巡检已启动，约 1 分钟完成','success');
      document.getElementById('exp-lib-list').innerHTML =
        '<div class="text-muted" style="padding:20px;text-align:center">🔍 AI 巡检进行中…</div>';
      // 完成后自动刷新
      setTimeout(()=>{ if(document.getElementById('agent-exp-overlay').style.display==='flex') loadExpLib(); }, 90000);
    }else showToast((r&&r.error)||'巡检启动失败','error');
  });
}
function expDelete(id){
  if(!confirm('确认删除该经验？删除后不可恢复（下次相似任务不再自动参考）。')) return;
  apiPost('/api/agent/experience/delete',{id:id}).then(r=>{
    if(r&&r.ok){ showToast('已删除','success'); loadExpLib(); }
    else showToast((r&&r.error)||'删除失败','error');
  });
}
function expKeep(id){
  apiPost('/api/agent/experience/keep',{id:id}).then(r=>{
    if(r&&r.ok){ showToast('已保留，后续不再重复建议','success'); loadExpLib(); }
    else showToast((r&&r.error)||'操作失败','error');
  });
}