const RegisterPage = {
  captcha: null,
  codeId: null,

  async mount() {
    // 动态加载来源下拉(不设默认来源)
    U.sources().then(list => {
      const sel = document.getElementById('rs');
      if (sel) {
        sel.innerHTML = '<option value="">不指定</option>' + list.map(s => `<option value="${U.esc(s.code)}">${U.esc(s.label)}</option>`).join('');
        this.toggleSource();
      }
    }).catch(()=>{});
  },

  async render() {
    try { this.captcha = await API.get('/captcha'); } catch { this.captcha = null; }
    return `
      <div class="pub-card wide">
        <div class="logo"><i class="fas fa-user-plus"></i><h2>创建账号</h2><p>加入MC举报系统</p></div>
        <form id="reg-form">

          <div class="grid-2">
            <div class="form-group"><label>站点用户名</label><input id="ru" required placeholder="用于登录"></div>
            <div class="form-group"><label>登录密码</label><input type="password" id="rp" required placeholder="至少6位"></div>
          </div>

          <div class="grid-2">
            <div class="form-group"><label>帐号来源</label><select id="rs" onchange="RegisterPage.toggleSource()"><option value="">加载中...</option></select></div>
            <div class="form-group"><label id="rs-label1">游戏名称</label><input id="rgn" required placeholder="Minecraft ID"></div>
          </div>

          <div class="form-group" id="uid-group" style="display:none"><label id="rs-label2">UID(可选)</label><input id="rgu" placeholder="选填"></div>

          ${this.captcha ? `
          <div class="form-group"><label>人机验证</label>
            <div style="display:flex;align-items:center;gap:10px">
              <input type="text" id="captcha-a" placeholder="输入图片字符" required style="flex:1">
              <div id="captcha-img" style="flex-shrink:0;border:1px solid var(--g200);border-radius:var(--r);overflow:hidden;cursor:pointer" onclick="RegisterPage.refreshCaptcha()" title="点击刷新">${this.captcha.svg}</div>
              <input type="hidden" id="captcha-id" value="${this.captcha.id}">
            </div>
          </div>` : ''}

          <div class="form-group"><label>邮箱</label>
            <div style="display:flex;gap:8px">
              <input type="email" id="re" required placeholder="用于接收验证码" style="flex:1">
              <button type="button" class="btn btn-o btn-sm" id="send-code-btn" style="white-space:nowrap">发送验证码</button>
            </div>
          </div>

          <div class="form-group"><label>邮箱验证码</label>
            <input id="vf-code" placeholder="6位数字" maxlength="6" pattern="[0-9]{6}" style="margin-bottom:8px">

          <div id="regerr" class="alert alert-e hidden"></div>
          <div id="regok" class="alert alert-s hidden"></div>
          <button type="submit" class="btn btn-p btn-lg w-full"><i class="fas fa-check"></i> 完成注册</button>
        </form>
        <div style="margin-top:14px;text-align:center;font-size:13px">
          <a href="#/login" style="color:var(--p);text-decoration:none;font-weight:600">已有账号？登录</a>
          <span style="color:var(--g4);margin:0 10px">|</span>
          <a href="#/home" style="color:var(--g5);text-decoration:none">匿名提交</a>
        </div>
      </div>`;
  },

  toggleSource() {
    const src = document.getElementById('rs').value;
    document.getElementById('rs-label1').textContent = '游戏名称';
    const isSkin = src === 'skin';
    document.getElementById('rs-label2').textContent = isSkin ? '皮肤站UUID(可选)' : 'UID(可选)';
    document.getElementById('uid-group').style.display = isSkin ? 'none' : '';
    document.getElementById('rgu').required = false;
  },

  async refreshCaptcha() {
    try { const c = await API.get('/captcha'); document.getElementById('captcha-img').innerHTML = c.svg; document.getElementById('captcha-id').value = c.id; document.getElementById('captcha-a').value = ''; } catch {}
  },

  mount() {
    this.toggleSource();

    document.getElementById('send-code-btn').addEventListener('click', async () => {
      const captcha = document.getElementById('captcha-a');
      if (captcha && !captcha.value.trim()) { alert('请先完成人机验证'); return; }
      const email = document.getElementById('re').value.trim();
      if (!email) { alert('请先填写邮箱'); return; }
      const btn = document.getElementById('send-code-btn');
      btn.disabled = true; btn.textContent = '发送中...';
      try {
        const r = await API.post('/auth/send-verify-code', { email });
        this.codeId = r.code_id;
        if (r.dev) alert('验证码: ' + r.code);
        btn.textContent = '\u2713 已发送';
        document.getElementById('vf-code').focus();
      } catch(ex) { alert(ex.message); btn.disabled = false; btn.textContent = '发送验证码'; }
    });

    document.getElementById('reg-form').addEventListener('submit', async e => {
      e.preventDefault();
      const btn = e.target.querySelector('button[type="submit"]');
      const err = document.getElementById('regerr'); const ok = document.getElementById('regok');
      err.classList.add('hidden'); ok.classList.add('hidden');
      btn.disabled = true; btn.innerHTML = '<i class="fas fa-spinner fa-spin"></i> 注册中...';
      try {
        await Auth.register({
          username: document.getElementById('ru').value.trim(), password: document.getElementById('rp').value,
          email: document.getElementById('re').value.trim(), game_name: document.getElementById('rgn').value.trim(),
          game_uid: document.getElementById('rgu').value.trim(), source: document.getElementById('rs').value,
          captcha_id: document.getElementById('captcha-id')?.value,
          captcha_answer: document.getElementById('captcha-a')?.value.trim(),
          code_id: this.codeId, code: document.getElementById('vf-code').value.trim(),
        });
        ok.textContent = '注册成功！即将跳转登录...'; ok.classList.remove('hidden');
        setTimeout(() => location.hash = '#/login', 2000);
      } catch (ex) {
        err.textContent = ex.message; err.classList.remove('hidden');
        btn.disabled = false; btn.innerHTML = '<i class="fas fa-check"></i> 完成注册';
      }
    });
  }
};