const PollsPage = {
  async render() { return '<div class="loading"><i class="fas fa-spinner"></i></div>'; },

  async mount() {
    document.getElementById('page-title').textContent = '投票';
    document.getElementById('page-actions').innerHTML = Auth.isOwner()
      ? '<button class="btn btn-p btn-sm" onclick="PollsPage.showCreate()"><i class="fas fa-plus"></i> 创建投票</button>'
      : '';
    await this.load();
  },

  async load() {
    const ct = document.getElementById('page-content');
    try {
      const polls = await API.get('/polls/active');
      ct.innerHTML = polls.length === 0
        ? '<div class="empty"><i class="fas fa-poll"></i><p>暂无进行中的投票</p></div>'
        : polls.map(p => this.renderPoll(p)).join('');
      for (const p of polls) this.bindVote(p);
    } catch (e) { ct.innerHTML = `<div class="alert alert-e">${e.message}</div>`; }
  },

  renderPoll(p) {
    const opts = p.options || [];
    const max = Math.max(1, ...Object.values(p.votes || {}));
    return `<div class="card" id="poll-${p.id}">
      <div class="card-h"><span>${U.esc(p.title)}</span><span class="ts tm">${p.total||0} 票</span></div>
      <div class="card-b">
        ${p.description?`<p class="tm mb-4">${U.esc(p.description)}</p>`:''}
        <div style="display:flex;flex-direction:column;gap:8px">
          ${opts.map((o,i) => {
            const v = p.votes?.[i] || 0;
            const pct = p.total ? Math.round(v/p.total*100) : 0;
            const my = p.my_vote === i;
            return `<div class="poll-opt" style="position:relative;overflow:hidden;border:1px solid var(--g200);border-radius:var(--r);cursor:pointer" data-poll="${p.id}" data-idx="${i}">
              <div style="position:absolute;top:0;left:0;bottom:0;width:${pct}%;background:${my?'var(--pl)':'var(--g2)'};transition:width .3s;z-index:0"></div>
              <div style="position:relative;z-index:1;display:flex;justify-content:space-between;align-items:center;padding:10px 14px;font-size:13px">
                <span>${my?'<i class="fas fa-check" style="color:var(--p)"></i> ':''}${U.esc(o)}</span>
                <span class="fb">${v}票 ${pct}%</span>
              </div>
            </div>`;
          }).join('')}
        </div>
      </div>
    </div>`;
  },

  bindVote(p) {
    const card = document.getElementById('poll-'+p.id);
    if (!card) return;
    card.querySelectorAll('.poll-opt').forEach(el => {
      el.addEventListener('click', async () => {
        try {
          await API.post(`/polls/${p.id}/vote`, { option_index: parseInt(el.dataset.idx) });
          this.load();
        } catch (ex) { alert(ex.message); }
      });
    });
  },

  showCreate() {
    U.modal('创建投票', `
      <form id="poll-form">
        <div class="form-group"><label>标题 *</label><input id="pl-title" required></div>
        <div class="form-group"><label>描述</label><textarea id="pl-desc" rows="2"></textarea></div>
        <div class="form-group"><label>选项 (每行一个，至少2个) *</label><textarea id="pl-opts" rows="4" placeholder="选项A&#10;选项B&#10;选项C" required></textarea></div>
        <div class="modal-f"><button type="button" class="btn btn-o" onclick="App.closeModal()">取消</button><button type="submit" class="btn btn-p">创建</button></div>
      </form>
    `);
    document.getElementById('poll-form').onsubmit = async e => {
      e.preventDefault();
      const opts = document.getElementById('pl-opts').value.split('\n').map(s=>s.trim()).filter(s=>s);
      if (opts.length < 2) return alert('至少需要2个选项');
      try {
        await API.post('/polls', { title: document.getElementById('pl-title').value, description: document.getElementById('pl-desc').value, options: opts });
        App.closeModal();
        this.load();
      } catch (ex) { alert(ex.message); }
    };
  }
};