/* 智能荐股系统 - 公共工具 */
const $ = (sel, el) => (el || document).querySelector(sel);
const $$ = (sel, el) => Array.from((el || document).querySelectorAll(sel));

async function api(url, opts) {
  const res = await fetch(url, opts);
  const data = await res.json().catch(() => ({}));
  if (!res.ok && data.error) throw new Error(data.error);
  return data;
}

function fmtPct(v) {
  if (v === null || v === undefined) return '--';
  const n = Number(v);
  return (n > 0 ? '+' : '') + n.toFixed(2) + '%';
}

function pctClass(v) {
  const n = Number(v);
  if (n > 0) return 'up';
  if (n < 0) return 'down';
  return 'flat';
}

function fmtNum(v, digits) {
  if (v === null || v === undefined) return '--';
  const n = Number(v);
  if (Math.abs(n) >= 10000) return (n / 10000).toFixed(2) + '万';
  return n.toFixed(digits === undefined ? 2 : digits);
}

function fmtAmountYi(v) {
  // 万元 -> 亿元
  const n = Number(v);
  if (!n) return '--';
  return (n / 10000).toFixed(2) + '亿';
}

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

function mdRender(text) {
  if (window.marked) {
    return marked.parse(text || '');
  }
  return '<pre style="white-space:pre-wrap">' + escapeHtml(text) + '</pre>';
}

/* 评分环（SVG） */
function scoreRing(el, score) {
  const color = score >= 82 ? '#ef4444' : score >= 68 ? '#f59e0b' : score >= 55 ? '#3b82f6' : '#6e7681';
  const r = 18, c = 2 * Math.PI * r;
  const off = c * (1 - Math.min(100, score) / 100);
  el.innerHTML = `<svg width="46" height="46">
    <circle cx="23" cy="23" r="${r}" stroke="#262d3a" stroke-width="5" fill="none"/>
    <circle cx="23" cy="23" r="${r}" stroke="${color}" stroke-width="5" fill="none"
      stroke-linecap="round" stroke-dasharray="${c}" stroke-dashoffset="${off}"/>
  </svg><span class="ring-val" style="color:${color}">${score}</span>`;
}

function scoreBars(parts) {
  const map = [['trend', '趋势'], ['momentum', '动量'], ['technical', '技术'],
               ['volume', '量能'], ['news', '消息'], ['institutional', '机构']];
  return map.map(([k, label]) => {
    const v = parts ? (parts[k] || 0) : 0;
    const pct = Math.min(100, v / (k === 'trend' ? 25 : k === 'momentum' ? 20 : 15) * 100);
    return `<div class="score-bar">
      <div class="sb-label">${label}</div>
      <div class="sb-track"><div class="sb-fill" style="width:${pct}%"></div></div>
      <div class="sb-val num">${v}</div>
    </div>`;
  }).join('');
}

/* 导航高亮 */
(function nav() {
  const path = location.pathname;
  $$('.nav-item').forEach(a => {
    const n = a.dataset.nav;
    if (n && (path === n || (n !== '/' && path.startsWith(n)))) a.classList.add('active');
  });
  const t = setInterval(() => {
    const el = $('#sideTime');
    if (!el) { clearInterval(t); return; }
    el.textContent = new Date().toLocaleString('zh-CN', { hour12: false });
  }, 1000);
})();

/* 弹窗 */
function openModal(html) {
  let mask = $('.modal-mask');
  if (!mask) {
    mask = document.createElement('div');
    mask.className = 'modal-mask';
    mask.innerHTML = `<div class="modal"><span class="modal-close">✕</span><div class="modal-body"></div></div>`;
    document.body.appendChild(mask);
    $('.modal-close', mask).onclick = () => mask.classList.remove('show');
    mask.onclick = e => { if (e.target === mask) mask.classList.remove('show'); };
  }
  $('.modal-body', mask).innerHTML = html;
  mask.classList.add('show');
  return mask;
}

/* toast */
function toast(msg, type) {
  let box = $('#toastBox');
  if (!box) {
    box = document.createElement('div');
    box.id = 'toastBox';
    box.style.cssText = 'position:fixed;top:20px;right:20px;z-index:999;display:flex;flex-direction:column;gap:8px;';
    document.body.appendChild(box);
  }
  const d = document.createElement('div');
  d.style.cssText = 'padding:10px 16px;border-radius:8px;background:#1c2230;border:1px solid #262d3a;color:#e6edf3;font-size:13px;box-shadow:0 4px 16px rgba(0,0,0,.4);';
  d.textContent = msg;
  box.appendChild(d);
  setTimeout(() => d.remove(), 2600);
}

function debounce(fn, ms) {
  let t;
  return function () { clearTimeout(t); t = setTimeout(() => fn.apply(this, arguments), ms); };
}