/* 工作流详情页 · 网格点详情滑入面板（尝试历史 + 阶段链诊断）
 *
 * 从点表「查看」按钮、Parallel Sets 点名列表 / 单点 drill-down 进入。
 * 面板 DOM 挂在 ctx.pointPanelEl（unmount 由控制器调用 closePointPanel 清理）。
 */

import { fetchPointDetailApi } from '../../api.js';
import { showToast } from '../../components/toast.js';
import { setupFocusTrap, releaseFocusTrap } from '../../components/modal.js';
import {
  escapeHtml, pointStatusBadge, pointMethodBadge,
  fmtRelc, fmtDur, fmtDateTime, fmtFullTs,
} from '../../utils/format.js';
import { isAbortError } from '../../utils/errors.js';
import { ICONS } from '../../utils/icons.js';

function buildPanelShell(ctx, name) {
  const backdrop = document.createElement('div');
  backdrop.className = 'point-panel-backdrop';
  backdrop.innerHTML = `
    <aside class="point-panel card" role="dialog" aria-modal="true" aria-label="网格点详情">
      <div class="point-panel-header">
        <div class="point-panel-title">
          <h3 class="point-panel-name" title="${escapeHtml(name)}">${escapeHtml(name)}</h3>
          <span class="point-panel-badges" id="point-panel-badges"></span>
        </div>
        <div class="point-panel-header-actions">
          <button type="button" class="btn btn-secondary btn-sm" data-panel-copy>复制点名</button>
          <button type="button" class="modal-close point-panel-close" aria-label="关闭">
            ${ICONS.x({ size: 16 })}
          </button>
        </div>
      </div>
      <div class="point-panel-body" id="point-panel-body">
        <p class="text-hint">加载中…</p>
      </div>
    </aside>
  `;
  backdrop.addEventListener('click', (e) => {
    if (e.target === backdrop) {
      closePointPanel(ctx);
      return;
    }
    if (e.target.closest('.point-panel-close')) {
      closePointPanel(ctx);
      return;
    }
    if (e.target.closest('[data-panel-copy]')) {
      navigator.clipboard?.writeText(name).then(
        () => showToast('点名已复制', 'success'),
        () => showToast('复制失败，请手动复制', 'info')
      );
      return;
    }
    // 种子来源点名跳查：换载面板内容到该点
    const seedLink = e.target.closest('[data-panel-point]');
    if (seedLink) {
      e.preventDefault();
      openPointPanel(ctx, seedLink.getAttribute('data-panel-point'));
    }
  });
  document.body.appendChild(backdrop);
  setupFocusTrap(backdrop.querySelector('.point-panel'));
  return backdrop;
}

export function closePointPanel(ctx) {
  if (!ctx.pointPanelEl) return;
  const panel = ctx.pointPanelEl.querySelector('.point-panel');
  if (panel) releaseFocusTrap(panel);
  ctx.pointPanelEl.remove();
  ctx.pointPanelEl = null;
}

export async function openPointPanel(ctx, pointName) {
  if (!ctx.name) return;
  closePointPanel(ctx);
  ctx.pointPanelEl = buildPanelShell(ctx, pointName);
  const body = ctx.pointPanelEl.querySelector('#point-panel-body');
  const badges = ctx.pointPanelEl.querySelector('#point-panel-badges');
  try {
    const res = await fetchPointDetailApi(ctx.name, pointName, { signal: ctx.abortCtl?.signal });
    if (res.status === 404) {
      body.innerHTML = '<p class="text-hint">该点不存在（可能已被删除）</p>';
      return;
    }
    if (!res.ok) throw new Error(`HTTP ${res.status}`);
    const json = await res.json();
    if (!json.success || !json.data) throw new Error(json.message || '无数据');
    const { point, attempts, conv } = json.data;
    badges.innerHTML = `${pointStatusBadge(point.status)} ${pointMethodBadge(point.success_method)}`;
    body.innerHTML = '';
    body.appendChild(buildAttemptSection(attempts));
    body.appendChild(buildConvSection(conv));
  } catch (err) {
    if (isAbortError(err)) return;
    body.innerHTML = `<p class="text-hint">加载失败：${escapeHtml(err.message)}（请关闭面板后重试，或检查网络）</p>`;
  }
}

function buildAttemptSection(attempts) {
  const sec = document.createElement('section');
  sec.className = 'point-section';
  const list = attempts || [];
  const rows = list.map((a, i) => {
    const ok = a.status === 'completed';
    const seedHtml = a.seed_point_name
      ? `<a href="#" data-panel-point="${escapeHtml(a.seed_point_name)}" class="seed-link" title="跳查种子来源点">${escapeHtml(a.seed_point_name)}</a>`
      : '—';
    const resultHtml = ok
      ? '<span class="activity-result ok">成功</span>'
      : `<span class="activity-result fail">${escapeHtml(a.status)}</span>`;
    return `
      <tr>
        <td class="tabular-num">${i + 1}</td>
        <td>${pointMethodBadge(a.task_type)}</td>
        <td>${seedHtml}</td>
        <td class="tabular-num">${fmtRelc(a.max_relc)}</td>
        <td>${resultHtml}</td>
        <td>${escapeHtml(a.node_id || '—')}</td>
        <td class="tabular-num" title="${escapeHtml(fmtFullTs(a.completed_at))}">${fmtDateTime(a.completed_at)}</td>
        <td class="tabular-num">${fmtDur(a.elapsed_sec)}</td>
      </tr>`;
  }).join('') || '<tr><td colspan="8" class="empty-cell">尚无尝试记录（点未被派发）</td></tr>';
  sec.innerHTML = `
    <h3 class="point-section-title">尝试历史（${list.length}）</h3>
    <div class="table-responsive">
      <table class="data-table attempts-table">
        <thead>
          <tr><th scope="col">#</th><th scope="col">方法</th><th scope="col">种子来源</th><th scope="col">max_relc</th><th scope="col">结果</th><th scope="col">节点</th><th scope="col">完成时间</th><th scope="col">耗时</th></tr>
        </thead>
        <tbody>${rows}</tbody>
      </table>
    </div>
  `;
  // 最近一次失败尝试的错误文本：textContent 渲染，杜绝 XSS
  const lastErr = [...list].reverse().find(a => a.error_message);
  if (lastErr) {
    const pre = document.createElement('pre');
    pre.className = 'code-pre-wrap point-error';
    pre.textContent = `最近错误：${lastErr.error_message}`;
    sec.appendChild(pre);
  }
  return sec;
}

function buildConvSection(conv) {
  const sec = document.createElement('section');
  sec.className = 'point-section';
  if (!conv) {
    sec.innerHTML = `
      <h3 class="point-section-title">阶段链诊断</h3>
      <p class="text-hint">诊断文件不可用（conv.json 缺失或解析失败）</p>`;
    return sec;
  }
  const stagesHtml = (conv.stages || []).map(st => {
    // 阶段状态图标用 SVG（与全局图标族一致），不用 emoji——emoji 跨平台渲染不一、
    // 无法由 CSS 控色，在暗色模式下尤其违和（no-emoji-icons）。
    const icon = st.converged
      ? ICONS.checkCircle({ size: 14, cls: 'stage-icon stage-icon-ok' })
      : ICONS.warn({ size: 14, cls: 'stage-icon stage-icon-warn' });
    const relc = st.best_max_relc != null ? Number(st.best_max_relc).toExponential(2) : '—';
    const iter = st.last_iter != null ? ` · ${st.last_iter} iter` : '';
    const depth = st.worst_depth != null ? ` · 最差深度 ${st.worst_depth}/${st.n_depths ?? '?'}` : '';
    const secs = st.elapsed_sec != null ? ` · ${Math.round(st.elapsed_sec)}s` : '';
    return `
      <div class="stage-chip ${st.converged ? 'stage-ok' : 'stage-warn'}">
        <span class="stage-label">${icon} ${escapeHtml(st.label)}</span>
        <span class="stage-meta tabular-num">relc ${relc} · chmax ${st.chmax ?? '—'}${iter}${depth}${secs}</span>
      </div>`;
  }).join('') || '<p class="text-hint">无阶段数据</p>';
  const seedTxt = conv.seed ? escapeHtml(String(conv.seed).split('/').pop()) : '无（冷启动）';
  // 半失败可见性（审查 #2 后续）：大气已收敛但光谱失败时，converged 仍为 true 而
  // synspec_rc/synspec_error 非空——必须把这两个量展示出来，否则半失败点无从排查。
  const synspecRc = conv.synspec_rc != null ? `<span class="tabular-num">${conv.synspec_rc}</span>` : '—';
  const synspecErrHtml = conv.synspec_error
    ? `<span class="activity-result fail" title="${escapeHtml(conv.synspec_error)}">${escapeHtml(conv.synspec_error)}</span>`
    : '—';
  sec.innerHTML = `
    <h3 class="point-section-title">阶段链诊断</h3>
    <div class="stage-chain">${stagesHtml}</div>
    <dl class="conv-meta">
      <div><dt>最终 max_relc</dt><dd class="tabular-num">${conv.final_max_relc != null ? Number(conv.final_max_relc).toExponential(3) : '—'}</dd></div>
      <div><dt>收敛阈值 chmax</dt><dd class="tabular-num">${conv.final_chmax ?? '—'}</dd></div>
      <div><dt>种子</dt><dd>${seedTxt}</dd></div>
      <div><dt>总耗时</dt><dd class="tabular-num">${conv.elapsed_sec != null ? `${Math.round(conv.elapsed_sec)}s` : '—'}</dd></div>
      <div><dt>synspec 耗时</dt><dd class="tabular-num">${conv.synspec_sec != null ? `${Math.round(conv.synspec_sec)}s` : '—'}</dd></div>
      <div><dt>synspec 返回码</dt><dd>${synspecRc}</dd></div>
      <div><dt>synspec 错误</dt><dd>${synspecErrHtml}</dd></div>
      <div><dt>大气 NaN</dt><dd>${conv.atmosphere_has_nan ? '<span class="activity-result fail">是</span>' : '否'}</dd></div>
    </dl>
  `;
  return sec;
}