'use strict';

const $ = (sel) => document.querySelector(sel);
const state = { project: null, session: null, sessions: [], detail: null, relative: false };

// ---------------------------------------------------------------- 表示ヘルパ

function fmtDur(ms) {
  if (ms === null || ms === undefined) return '–';
  if (ms < 0) return '-' + fmtDur(-ms);
  const s = ms / 1000;
  if (s < 1) return `${ms}ms`;
  if (s < 60) return `${s.toFixed(1)}秒`;
  const m = Math.floor(s / 60);
  if (m < 60) return `${m}分${String(Math.round(s - m * 60)).padStart(2, '0')}秒`;
  const h = Math.floor(m / 60);
  return `${h}時間${String(m - h * 60).padStart(2, '0')}分`;
}

function fmtTime(iso) {
  if (!iso) return '–';
  const d = new Date(iso);
  const p = (n) => String(n).padStart(2, '0');
  return `${p(d.getHours())}:${p(d.getMinutes())}:${p(d.getSeconds())}.${String(d.getMilliseconds()).padStart(3, '0')[0]}`;
}

function fmtDayTime(iso) {
  if (!iso) return '–';
  const d = new Date(iso);
  const day = `${String(d.getMonth() + 1).padStart(2, '0')}/${String(d.getDate()).padStart(2, '0')}`;
  return `<span class="d">${day}</span> ${fmtTime(iso)}`;
}

function sameDay(a, b) {
  if (!a || !b) return false;
  const x = new Date(a);
  const y = new Date(b);
  return x.getFullYear() === y.getFullYear() && x.getMonth() === y.getMonth() && x.getDate() === y.getDate();
}

function fmtDateTime(iso) {
  if (!iso) return '–';
  const d = new Date(iso);
  return d.toLocaleString('ja-JP', { hour12: false, year: '2-digit', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit' });
}

function fmtBytes(n) {
  if (n < 1024) return `${n}B`;
  if (n < 1024 * 1024) return `${(n / 1024).toFixed(0)}KB`;
  return `${(n / 1024 / 1024).toFixed(1)}MB`;
}

function ago(iso) {
  if (!iso) return '';
  const diff = (Date.now() - new Date(iso).getTime()) / 1000;
  if (diff < 3600) return `${Math.max(1, Math.round(diff / 60))}分前`;
  if (diff < 86400) return `${Math.round(diff / 3600)}時間前`;
  return `${Math.round(diff / 86400)}日前`;
}

const esc = (s) => String(s ?? '').replace(/[&<>"]/g, (c) => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;' }[c]));

async function api(path) {
  const res = await fetch(path);
  const data = await res.json();
  if (data.error) throw new Error(data.error);
  return data;
}

// ---------------------------------------------------------------- プロジェクト

async function loadProjects() {
  const data = await api('/api/projects');
  $('#root').textContent = data.root;
  const ul = $('#project-list');
  ul.innerHTML = '';
  data.projects.forEach((p) => {
    const li = document.createElement('li');
    li.dataset.id = p.id;
    li.innerHTML = `<div class="p-path">${esc(p.path)}</div>
      <div class="p-meta">${p.sessions} タスク · ${fmtBytes(p.bytes)} · ${ago(p.lastActivity)}</div>`;
    li.onclick = () => selectProject(p.id);
    ul.appendChild(li);
  });
  if (data.projects.length) selectProject(state.project && data.projects.some((p) => p.id === state.project) ? state.project : data.projects[0].id);
}

async function selectProject(id) {
  state.project = id;
  document.querySelectorAll('#project-list li').forEach((li) => li.classList.toggle('sel', li.dataset.id === id));
  $('#csv-sessions').href = `/api/sessions?project=${encodeURIComponent(id)}&format=csv`;
  const tbody = $('#session-table tbody');
  tbody.innerHTML = '<tr><td class="loading">解析中…</td></tr>';
  try {
    const data = await api(`/api/sessions?project=${encodeURIComponent(id)}`);
    state.sessions = data.sessions;
    renderSessions();
  } catch (e) {
    tbody.innerHTML = `<tr><td class="err">${esc(e.message)}</td></tr>`;
  }
}

function renderSessions() {
  const q = $('#filter').value.trim().toLowerCase();
  const rows = state.sessions.filter(
    (s) => !q || (s.title + ' ' + s.firstPrompt + ' ' + s.lastPrompt).toLowerCase().includes(q)
  );
  $('#sessions-title').textContent = `タスク ${rows.length}/${state.sessions.length}`;
  const tbody = $('#session-table tbody');
  tbody.innerHTML = '';
  if (!rows.length) {
    tbody.innerHTML = '<tr><td class="empty">該当なし</td></tr>';
    return;
  }
  rows.forEach((s) => {
    const tr = document.createElement('tr');
    tr.dataset.id = s.id;
    tr.className = s.id === state.session ? 'sel' : '';
    tr.innerHTML = `
      <td>
        <div class="s-title">${esc(s.title)}</div>
        <div class="s-meta">
          <span class="s-when">${fmtDateTime(s.start)}</span>
          <span>${s.turnCount} 往復</span>
          <span>全体 ${fmtDur(s.wallMs)}</span>
          <span>作業 ${fmtDur(s.activeMs)}</span>
          ${s.gitBranch ? `<span>⑂ ${esc(s.gitBranch)}</span>` : ''}
        </div>
      </td>`;
    tr.onclick = () => selectSession(s.id);
    tbody.appendChild(tr);
  });
}

// ---------------------------------------------------------------- 詳細

async function selectSession(id) {
  state.session = id;
  document.querySelectorAll('#session-table tr').forEach((tr) => tr.classList.toggle('sel', tr.dataset.id === id));
  $('#csv-turns').href = `/api/session?project=${encodeURIComponent(state.project)}&id=${encodeURIComponent(id)}&format=csv`;
  $('#detail-body').innerHTML = '<p class="loading">読み込み中…</p>';
  try {
    state.detail = await api(`/api/session?project=${encodeURIComponent(state.project)}&id=${encodeURIComponent(id)}`);
    renderDetail();
  } catch (e) {
    $('#detail-body').innerHTML = `<p class="err">${esc(e.message)}</p>`;
  }
}

function renderDetail() {
  const d = state.detail;
  if (!d) return;
  $('#detail-title').textContent = d.title;

  const maxSpan = Math.max(1, ...d.turns.map((t) => (t.idleMs || 0) + (t.durMs || 0)));
  const scale = (ms) => {
    const v = Math.max(0, ms || 0);
    return v ? Math.max(2, Math.round((v / maxSpan) * 95)) : 0;
  };
  const t0 = d.turns.length ? new Date(d.turns[0].tsIso).getTime() : 0;

  const head = `
    <div class="sum">
      <div><span class="k">開始</span><span class="v">${fmtDateTime(d.start)}</span></div>
      <div><span class="k">終了</span><span class="v">${fmtDateTime(d.end)}</span></div>
      <div><span class="k">全体</span><span class="v">${fmtDur(d.wallMs)}</span></div>
      <div><span class="k">作業時間合計</span><span class="v">${fmtDur(d.activeMs)}</span></div>
      <div><span class="k">往復</span><span class="v">${d.turnCount}</span></div>
      <div><span class="k">応答メッセージ</span><span class="v">${d.assistantMsgs}</span></div>
      <div><span class="k">ツール呼び出し</span><span class="v">${d.toolCalls}</span></div>
      <div><span class="k">サブエージェント</span><span class="v">${d.sidechainMsgs}</span></div>
      <div><span class="k">ログ</span><span class="v">${fmtBytes(d.bytes)} · ${esc(d.id.slice(0, 8))}</span></div>
    </div>`;

  const rows = d.turns
    .map((t) => {
      const rel = (iso) => '+' + fmtDur(new Date(iso).getTime() - t0);
      const when = state.relative ? rel(t.tsIso) : fmtDayTime(t.tsIso);
      // 完了時刻は日をまたいだ時だけ日付を出す
      const done = !t.endIso
        ? '–'
        : state.relative
          ? rel(t.endIso)
          : sameDay(t.endIso, t.tsIso)
            ? fmtTime(t.endIso)
            : fmtDayTime(t.endIso);
      const tools = t.toolList.map(([n, c]) => (c > 1 ? `${n}×${c}` : n)).join(', ');
      return `
      <tr data-i="${t.i}">
        <td class="n">${t.i}</td>
        <td class="time" title="${esc(fmtDateTime(t.tsIso))}">${when}${t.kind !== 'prompt' ? ` <span class="kind ${t.kind}">${t.kind}</span>` : ''}</td>
        <td class="num">${t.idleMs !== null && t.idleMs < 0
          ? `<span class="ovl" title="前のターンの処理中に送信 (${fmtDur(-t.idleMs)} 重複)">並行</span>`
          : fmtDur(t.idleMs)}</td>
        <td class="num">${fmtDur(t.waitMs)}</td>
        <td class="num">${fmtDur(t.durMs)}</td>
        <td class="time done" title="${esc(fmtDateTime(t.endIso))}">${done}</td>
        <td><div class="bar">
          <i class="b-idle" style="width:${scale(t.idleMs)}px" title="空き ${fmtDur(t.idleMs)}"></i>
          <i class="b-wait" style="width:${scale(t.waitMs)}px" title="初回応答まで ${fmtDur(t.waitMs)}"></i>
          <i class="b-work" style="width:${scale((t.durMs || 0) - (t.waitMs || 0))}px" title="応答中 ${fmtDur((t.durMs || 0) - (t.waitMs || 0))}"></i>
        </div></td>
        <td class="n small">${t.assistant}<span class="u">msg</span>${t.toolCalls ? ` ${t.toolCalls}<span class="u">tool</span>` : ''}</td>
        <td class="msg">
          <div class="txt">${esc(t.prompt)}${t.truncated ? ' …' : ''}</div>
          ${tools ? `<div class="tools">${esc(tools)}</div>` : ''}
          ${t.interrupted ? '<div class="int">⚠ 中断あり</div>' : ''}
        </td>
      </tr>`;
    })
    .join('');

  $('#detail-body').innerHTML =
    head +
    (d.turns.length
      ? `<table id="turns">
          <thead><tr>
            <th class="n">#</th><th>${state.relative ? '経過' : '発言時刻'}</th>
            <th class="n">空き</th><th class="n">初回応答</th><th class="n">応答時間</th>
            <th>${state.relative ? '完了(経過)' : '完了時刻'}</th><th>タイムライン</th><th class="n">内訳</th><th>やりとり</th>
          </tr></thead><tbody>${rows}</tbody></table>`
      : '<p class="empty">やりとりが記録されていません。</p>');

  document.querySelectorAll('#turns .msg').forEach((td) => {
    td.onclick = () => td.parentElement.classList.toggle('open');
  });
}

// ---------------------------------------------------------------- 起動

$('#filter').oninput = renderSessions;
$('#relative').onchange = (e) => {
  state.relative = e.target.checked;
  renderDetail();
};
$('#reload').onclick = async () => {
  await fetch('/api/reload');
  const keepSession = state.session;
  await loadProjects();
  if (keepSession) selectSession(keepSession).catch(() => {});
};

loadProjects().catch((e) => {
  $('#project-list').innerHTML = `<li class="err">${esc(e.message)}</li>`;
});