const $ = selector => document.querySelector(selector);
const esc = value => String(value).replace(/[&<>"']/g, char => ({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[char]));
const findBook = id => books.find(book => book.id === id);
const uniqueIds = ids => [...new Set(ids)].filter(id => findBook(id));
const today = () => new Date().toLocaleDateString('sv-SE');
const storageKey = 'weread-demo-goals-v2';
let page = 'overview', shelfTab = 'reading', discoverTab = 'books', searchQuery = '', period = 'week';
let noteBook = 'all', noteType = 'all', goalFilter = 'all', dataState = 'ready';
let detailBook = null, bookTab = 'info', reviewFilter = '全部', selectedChapter = 'all';
let editingGoalId = null, draftIds = new Set(), draftSources = [], goals = initialGoals.map(goal => ({...goal, ids:[...goal.ids], sources:[...goal.sources]}));
let toastTimer, storageWarning = '';
// 本地数据损坏时保留原存储并恢复示例；保存前仍要求用户通过有效表单提交。
try {
  const saved = localStorage.getItem(storageKey);
  if (saved) {
    const parsed = JSON.parse(saved);
    if (!Array.isArray(parsed) || !parsed.every(goal => typeof goal.id === 'string' && typeof goal.name === 'string' && /^\d{4}-\d{2}-\d{2}$/.test(goal.start) && /^\d{4}-\d{2}-\d{2}$/.test(goal.end) && goal.start <= goal.end && Array.isArray(goal.ids) && Array.isArray(goal.sources))) throw new Error('invalid');
    goals = parsed.map(goal => ({...goal,ids:uniqueIds(goal.ids)}));
  }
} catch { storageWarning = '本地目标暂时无法读取，已显示示例目标；原存储未修改。'; }
function toast(message) {
  clearTimeout(toastTimer); $('#toast').textContent = message; $('#toast').classList.remove('hidden');
  toastTimer = setTimeout(() => $('#toast').classList.add('hidden'), 3500);
}
function persistGoals(next) {
  try { localStorage.setItem(storageKey, JSON.stringify(next)); }
  catch { $('#goal-error').textContent = '浏览器无法保存数据，请允许本地存储后重试。'; return false; }
  goals = next; return true;
}
function setTheme(theme) {
  document.documentElement.dataset.theme = theme;
  $('#theme').innerHTML = `<svg><use href="#${theme === 'dark' ? 'sun' : 'moon'}"/></svg>`;
  $('#theme').setAttribute('aria-label', `切换至${theme === 'dark' ? '亮' : '暗'}色主题`);
}
try { setTheme(localStorage.getItem('weread-demo-theme') === 'dark' ? 'dark' : 'light'); } catch { setTheme('light'); }
$('#theme').onclick = () => {
  const theme = document.documentElement.dataset.theme === 'dark' ? 'light' : 'dark'; setTheme(theme);
  try { localStorage.setItem('weread-demo-theme', theme); } catch { toast('主题已切换，本次浏览有效。'); }
};
function cover(book, mini = false) {
  if (mini) return `<div class="mini-cover ${book.cover}" aria-hidden="true"><b>${esc(book.title)}</b><small>${esc(book.author)}</small></div>`;
  return `<div class="cover ${book.cover}"><span class="tiny">${book.en}</span><span class="title">${book.short.replaceAll('\n','<br>')}</span><span class="author">${book.author}</span><span class="publisher">READING SPACE · 示意封面</span></div>`;
}
function bookCard(book) {
  return `<button class="book" data-action="book" data-id="${book.id}" aria-label="查看${book.title}详情">${cover(book)}<h3>${book.title}</h3><p>${book.author}</p><div class="progress" style="--progress:${book.progress}%"><i></i></div><div class="book-meta"><span>${book.status === 'done' ? '已读完' : book.status === 'wish' ? '想读' : `已读 ${book.progress}%`}</span><span>评分 ${Math.round(Number(book.score)*10)}/100</span></div></button>`;
}
function bookRow(book, source = '') {
  return `<div class="book-row">${cover(book,true)}<div class="book-row-text"><b>${book.title}</b><p>${book.author}${source ? ' · '+esc(source) : ''}</p><div class="progress" style="--progress:${book.progress}%"><i></i></div></div><span class="book-row-status">${book.status === 'done' ? '已读完' : `${book.progress}%`}</span><button class="text-button" data-action="book" data-id="${book.id}" aria-label="查看${book.title}详情">详情 ↗</button></div>`;
}
function welcome(title, subtitle, action = '') {
  return `<section class="welcome"><div><div class="eyebrow">A LITTLE READING, EVERY DAY</div><h1>${title}</h1><p>${subtitle}</p></div><div class="page-actions">${action}</div></section>`;
}
const pageNames = {overview:'阅读概览',shelf:'我的书架',goals:'阅读目标',notes:'笔记与划线',discover:'发现好书'};
function navigate(next) {
  page = next; $('#crumb').textContent = pageNames[page];
  document.querySelectorAll('[data-page]').forEach(button => {button.classList.toggle('active',button.dataset.page === page);button.setAttribute('aria-current',button.dataset.page === page ? 'page' : 'false');});
  renderPage();
}
function renderPage() {
  const views = {overview:renderOverview,shelf:renderShelf,goals:renderGoals,notes:renderNotes,discover:renderDiscover};
  $('#page-content').innerHTML = views[page]();
}
function tabs(items, selected, action) {
  return `<div class="type-chips">${items.map(([id,label]) => `<button class="${selected === id ? 'active':''}" aria-pressed="${selected === id}" data-action="${action}" data-id="${id}">${label}</button>`).join('')}</div>`;
}
// 已读状态与目标日期无关；先按书籍 ID 去重，再计算完成率。
function goalMetrics(goal, date = today()) {
  const ids = uniqueIds(goal.ids), done = ids.filter(id => findBook(id).status === 'done').length;
  const status = ids.length && done === ids.length ? '已完成' : date < goal.start ? '未开始' : date > goal.end ? '已到期' : '进行中';
  return {total:ids.length,done,percent:ids.length ? Math.round(done/ids.length*100):0,status};
}
function goalCard(goal) {
  const result = goalMetrics(goal);
  return `<article class="card goal-card"><div class="section-head"><span class="pill ${result.status === '已完成' ? 'green' : result.status === '已到期' ? 'amber':''}">${result.status}</span><button class="text-button" data-action="edit-goal" data-id="${esc(goal.id)}" aria-label="编辑${esc(goal.name)}">编辑 ↗</button></div><h3>${esc(goal.name)}</h3><div class="goal-date">${goal.start} — ${goal.end}</div><div class="cover-stack">${goal.ids.slice(0,4).map(id=>cover(findBook(id),true)).join('')}${result.total>4?`<span class="stack-more">+ ${result.total-4} 本</span>`:''}</div><div class="goal-progress"><span><strong>${result.done}</strong> / ${result.total} 本已读完</span><span>${result.percent}%</span></div><div class="progress" style="--progress:${result.percent}%"><i></i></div><div class="goal-card-footer"><small>${goal.sources.length ? `来自 ${goal.sources.length} 个书单 · 可混合单书` : '按本选书 · 自己定义节奏'}</small><button data-action="goal-detail" data-id="${esc(goal.id)}">查看清单 →</button></div></article>`;
}
function renderGoals() {
  const list = goals.filter(goal => goalFilter === 'all' || (goalFilter === 'complete' ? goalMetrics(goal).status === '已完成' : goalMetrics(goal).status !== '已完成'));
  return welcome('把想读，变成读过','几本书、一份书单，或一段想留给阅读的时间。', '<button class="primary" data-action="new-goal">＋ 新建阅读目标</button>')+
    `<div class="goal-intro"><div><div class="eyebrow">YOUR NEXT CHAPTER</div><h2>目标不必宏大，开始就很好。</h2><p>每份清单都有自己的节奏。已经读完的书，也会成为你完成目标的一部分。</p><div class="metrics-row"><span><strong>${goals.length}</strong>个目标</span><span><strong>${goals.filter(g=>goalMetrics(g).status==='已完成').length}</strong>个已完成</span><span><strong>${uniqueIds(goals.flatMap(g=>g.ids)).length}</strong>本不同的书</span></div></div><span class="symbol">❧</span></div>`+
    tabs([['all','全部目标'],['active','未完成'],['complete','已完成']],goalFilter,'goal-filter')+`<div class="goals-grid">${list.map(goalCard).join('') || '<div class="card empty">这里还没有目标，创建一份属于你的阅读清单。</div>'}</div>`;
}
function summaryGoals() {
  return `<section class="card panel summary-goals"><div class="section-head"><h2>我的阅读目标</h2><button class="text-button" data-action="page" data-id="goals">全部 ↗</button></div>${goals.slice(0,3).map(goal=>{const m=goalMetrics(goal);return `<button class="goal-summary-row" data-action="goal-detail" data-id="${esc(goal.id)}"><strong>${esc(goal.name)}</strong><small>${m.done} / ${m.total} 本已读完 · ${m.status}</small><div class="progress" style="--progress:${m.percent}%"><i></i></div></button>`;}).join('')}<button class="text-button section-space" data-action="new-goal">＋ 新建阅读目标</button></section>`;
}
function renderOverview() {
  const values = {week:[42,65,33,57,86,71,48],month:[48,54,65,38,70,52,64,75,68,42,46],year:[8,11,14,9,18,15,12,14,27.7],overall:[75,96,128.7]}[period];
  const labels = {week:['一','二','三','四','五','六','日'],month:['1日','2日','3日','4日','5日','6日','7日','8日','9日','10日','11日'],year:['1月','2月','3月','4月','5月','6月','7月','8月','9月'],overall:['2024','2025','2026']}[period];
  const max = Math.ceil(Math.max(...values)/10)*10;
  const totalMinutes = values.reduce((a,b)=>a+b,0)*(period==='year'||period==='overall'?60:1);
  const duration = `${Math.floor(totalMinutes/60)}小时${Math.round(totalMinutes%60)}分钟`;
  const days = {week:7,month:11,year:132,overall:412}[period];
  const naturalDays = {week:7,month:11,year:254,overall:985}[period];
  const units = period==='year'||period==='overall'?'时':'分';
  const stats = [['阅读 / 收听时长',duration,'当前所选周期','clock'],['有效阅读天数',`${days}<small>天</small>`,'单日满 1 分钟计一天','flag'],['自然日均阅读',`${Math.round(totalMinutes/naturalDays)}<small>分钟</small>`,'按周期自然日计算','chart'],['笔记总数','10<small>条</small>','划线 2 · 想法 2 · 书签 6','note']];
  return welcome('在字里行间，遇见自己','阅读、目标与灵感，在这里慢慢积累。','<button class="primary" data-action="new-goal">＋ 新建目标</button>')+
    `<div class="toolbar">${tabs([['week','本周'],['month','本月'],['year','本年'],['overall','总计']],period,'period')}<span class="hint">统计示例 · ${period==='overall'?'2024—2026':'2026 年'}</span></div><section class="stats">${stats.map(([label,value,hint,icon])=>`<article class="card stat"><div class="stat-label">${label}<svg><use href="#${icon}"/></svg></div><div class="stat-value compact-value">${value}</div><div class="stat-foot">${hint}</div></article>`).join('')}</section>
    <div class="columns"><div><section class="card trend"><div class="section-head"><h2>阅读的日常 <small>每一天，都算数</small></h2><span class="hint">${period==='year'?'按月':period==='overall'?'按年':'按日'}</span></div><div class="trend-total">${duration}<small>阅读与收听合计</small></div><div class="chart"><div class="gridlines">${[max,Math.round(max*2/3),Math.round(max/3),0].map(n=>`<i data-label="${n}${n?units:''}"></i>`).join('')}</div><div class="bars">${values.map((v,i)=>`<div class="bar" style="--h:${v/max*100}%" data-tip="${v}${units}" role="img" aria-label="${labels[i]} ${v}${units}"><span>${labels[i]}</span></div>`).join('')}</div></div></section><section class="card shelf"><div class="section-head"><h2>继续阅读</h2><button class="text-button" data-action="page" data-id="shelf">全部书架 ↗</button></div><div class="books">${books.filter(b=>b.status==='reading').map(bookCard).join('')}</div></section></div><aside class="rightcol">${summaryGoals()}<section class="quote"><div class="eyebrow">✦ 留给今天的一句话</div><p>不必追赶每一页，<br>只需为自己翻开一本书。</p><small>— 阅间 · 原创阅读手记</small></section></aside></div>
    <div class="insight-grid"><section class="card panel insight"><h3>读得最多</h3>${books.slice(0,3).map((b,i)=>`<div class="insight-line"><b>${i+1}. ${b.title}</b><span>${[2,1,1][i]}小时${[12,35,6][i]}分钟</span></div>`).join('')}</section><section class="card panel insight"><h3>偏爱的阅读方向</h3>${[['文学',80],['心理学',60],['科幻',40]].map(([label,val])=>`<div class="insight-line"><b>${label}</b><span>相对偏好 ${val}</span></div><div class="progress" style="--progress:${val}%"><i></i></div>`).join('')}<p class="hint section-space">相对偏好权重，不是阅读占比</p></section><section class="card panel insight"><h3>留给自己的时段</h3><div class="hour-bars">${Array.from({length:24},(_,i)=>`<i style="--height:${[10,20,15,12,20,35,28,24,12,10,16,20,30,35,40,65,95,85,40,15,6,4,3,5][i]}%"></i>`).join('')}</div><div class="insight-line"><span>06:00</span><span>18:00</span><span>次日 05:00</span></div><p class="hint">偏好夜间阅读 · 示例时段分布</p></section></div>
    <details class="insight-detail card panel"><summary>更多阅读画像 · 作者、听书、勋章与年度回顾</summary><div class="insight-grid"><div><h3>偏好作者与出版方</h3><div class="insight-line"><b>刘慈欣</b><span>3 本 · 5小时30分钟</span></div><div class="insight-line"><b>示例出版社</b><span>4 本</span></div><div class="insight-line"><b>示例版权方</b><span>3 本</span></div></div><div><h3>阅读与收听</h3><div class="insight-line"><b>文字阅读</b><span>80%</span></div><div class="progress" style="--progress:80%"><i></i></div><p class="hint section-space">示例分布；正式接入只在接口返回时展示。</p></div><div><h3>阅读足迹</h3><div class="insight-line"><b>好友排行</b><span>本周第 3 · 示例</span></div><div class="insight-line"><b>勋章</b><span>初读 · 笔记 · 坚持</span></div><button class="text-button" data-action="year-report">年度回顾示意 →</button></div></div></details>`;
}
function listCard(list, index) {
  return `<button class="card list-card" data-action="list" data-id="${list.id}"><div class="list-art">${list.ids.slice(0,3).map(id=>cover(findBook(id),true)).join('')}</div><h3><span class="list-index">${String(index+1).padStart(2,'0')}</span>${list.name}</h3><p>${list.description}</p><small>${list.ids.length} 本书 · ${list.source}</small></button>`;
}
function renderLists(lists) { return `<div class="list-grid">${lists.map(listCard).join('') || '<div class="empty">没有匹配的书单，换个关键词试试。</div>'}</div>`; }
function renderShelf() {
  let content;
  if (shelfTab==='lists') content=renderLists(booklists.filter(l=>l.source==='我的书单'));
  else if (shelfTab==='audio') content=`<article class="card media-card"><div class="media-icon">♫</div><div><h3>晚间听书 · 文学选读</h3><p>示例演播者 · 24 集 · 内容已完结</p><p class="hint">内容完结不代表已听完；当前不纳入按本阅读目标。</p></div></article>`;
  else if(shelfTab==='articles') content=`<article class="card media-card"><div class="media-icon">▤</div><div><h3>文章收藏</h3><p>这是书架中的收藏入口。</p><p class="hint">当前书架接口不提供入口内文章列表；可在发现页搜索文章。</p><button class="text-button" data-action="article-search">去搜索文章 →</button></div></article>`;
  else content=`<div class="card panel"><div class="books full-books">${books.filter(b=>shelfTab==='all'||b.status===shelfTab).map(bookCard).join('')}</div></div>`;
  return welcome('我的书架','8 本电子书 · 1 个有声专辑 · 1 个文章收藏入口，共 10 个书架条目。')+tabs([['all','全部电子书 8'],['reading','在读 4'],['done','已读完 2'],['wish','想读 2'],['lists','我的书单 2'],['audio','有声书 1'],['articles','文章收藏']],shelfTab,'shelf-tab')+content;
}
function openList(id) {
  const list=booklists.find(l=>l.id===id);
  showDetail('书单详情',`<div class="discovery-hero"><div class="eyebrow">A COLLECTION OF GOOD BOOKS</div><h2>${list.name}</h2><p>${list.description}</p><p class="source-tag">${list.source} · ${list.ids.length} 本 · 示例成员</p></div><div class="row-list">${list.ids.map(id=>bookRow(findBook(id))).join('')}</div><div class="goal-actions"><button class="primary" data-action="add-list" data-id="${id}">加入阅读目标</button></div>${list.source.startsWith('公开')?'<p class="hint section-space">公开书单成员为设计示意，完整成员获取方式待真实接口验证。</p>':''}`);
}
function showDetail(title, html) { $('#detail-title').textContent=title;$('#detail-content').innerHTML=html;if(!$('#detail').open)$('#detail').showModal(); }
function openGoalDetail(id) {
  const goal=goals.find(g=>g.id===id), m=goalMetrics(goal);
  showDetail('阅读目标',`<div class="section-head"><span class="pill green">${m.status}</span><span class="hint">${goal.start} — ${goal.end}</span></div><h2>${esc(goal.name)}</h2><div class="metrics-row"><span><strong>${m.done} / ${m.total}</strong>本已读完</span><span><strong>${m.percent}%</strong>已完成</span></div><p class="hint">已读完直接计入完成，不受目标日期影响。</p>${goal.sources.length?`<p class="source-tag">加入过的书单：${goal.sources.map(esc).join('、')} · 保存时的书目</p>`:''}<div class="row-list">${goal.ids.map(id=>bookRow(findBook(id))).join('')}</div><div class="goal-actions"><button class="primary" data-action="edit-goal" data-id="${esc(id)}">编辑目标与书目</button></div>`);
}
function openGoalEditor(id=null, prefill=[], sources=[]) {
  $('#detail').close(); editingGoalId=id;
  const goal=id?goals.find(g=>g.id===id):null;
  draftIds=new Set(goal?goal.ids:prefill);draftSources=[...(goal?goal.sources:sources)];
  $('#editor-title').textContent=goal?'编辑阅读目标':'新建阅读目标';$('#goal-name').value=goal?goal.name:'';
  $('#goal-start').value=goal?goal.start:today();$('#goal-end').value=goal?goal.end:`${today().slice(0,4)}-12-31`;
  $('#goal-end').min=$('#goal-start').value;$('#goal-end').setCustomValidity('');$('#goal-name').setCustomValidity('');
  $('#picker-search').value='';$('#goal-error').textContent='';renderPicker();$('#goal-editor').showModal();
}
function selectedGoalBooks() { return uniqueIds([...draftIds]); }
function renderPicker() {
  const query=$('#picker-search').value.trim().toLowerCase();
  const list=books.filter(b=>`${b.title}${b.author}`.toLowerCase().includes(query));
  $('#selection-count').textContent=`已选 ${draftIds.size} 本 · ${[...draftIds].filter(id=>findBook(id).status==='done').length} 本已读完`;
  $('#goal-picker').innerHTML=`<p class="hint">快捷加入书单当前书目</p><div class="picker-lists">${booklists.filter(l=>!query||l.name.includes(query)||l.ids.some(id=>list.some(b=>b.id===id))).map(l=>`<button type="button" data-action="pick-list" data-id="${l.id}" class="${l.ids.every(id=>draftIds.has(id))?'active':''}">${l.ids.every(id=>draftIds.has(id))?'✓':'＋'} ${l.name} · ${l.ids.length} 本</button>`).join('')}</div><div class="picker-list">${list.map(b=>`<label class="pick-row"><input type="checkbox" data-pick-book="${b.id}" ${draftIds.has(b.id)?'checked':''}><span><b>${b.title}</b><small>${b.author}</small></span><span class="pill ${b.status==='done'?'green':''}">${b.status==='done'?'已读完':b.status==='wish'?'想读':b.progress+'%'}</span></label>`).join('')||'<div class="empty">没有匹配的书籍</div>'}</div>`;
}
function saveGoal(event) {
  event.preventDefault();const name=$('#goal-name').value.trim(),start=$('#goal-start').value,end=$('#goal-end').value,ids=selectedGoalBooks();
  if(!name){$('#goal-name').setCustomValidity('请输入目标名称');$('#goal-name').reportValidity();return;}
  if(end<start){$('#goal-error').textContent='结束日期不能早于开始日期。';return;}
  if(!ids.length){$('#goal-error').textContent='请至少选择一本书，或加入一个书单。';return;}
  const goal={id:editingGoalId||crypto.randomUUID(),name,start,end,ids,sources:[...new Set(draftSources)]};
  const next=editingGoalId?goals.map(g=>g.id===editingGoalId?goal:g):[goal,...goals];
  if(!persistGoals(next))return;
  $('#goal-editor').close();navigate('goals');toast('阅读目标已保存，已读完的书已计入完成。');
}
function chooseTarget(ids,sources=[]) {
  showDetail('加入阅读目标',`<p class="detail-subtitle">选择已有目标，或为这些书新建目标。重复书籍只加入一次。</p><div class="row-list">${goals.map(g=>`<div class="book-row"><div class="book-row-text"><b>${esc(g.name)}</b><p>${g.start} — ${g.end} · ${g.ids.length} 本</p></div><button class="secondary" data-action="append-goal" data-id="${esc(g.id)}">加入</button></div>`).join('')}</div><div class="goal-actions"><button class="primary" data-action="new-with-selection">＋ 新建目标</button></div>`);
  pendingBooks=ids;pendingSources=sources;
}
let pendingBooks=[],pendingSources=[];
function appendGoal(id) {
  const next=goals.map(g=>g.id===id?{...g,ids:uniqueIds([...g.ids,...pendingBooks]),sources:[...new Set([...g.sources,...pendingSources])]}:g);
  try { localStorage.setItem(storageKey,JSON.stringify(next)); } catch { toast('无法保存到浏览器，请允许本地存储后重试。');return; }
  goals=next;renderPage();openGoalDetail(id);toast('已加入目标，重复书籍已自动去重。');
}
function renderDiscover() {
  const options=[['books','书籍'],['lists','书单'],['recommend','为你推荐'],['all','综合'],['author','作者'],['novel','网文'],['audio','听书'],['fulltext','全文'],['account','公众号'],['article','文章']];
  const matched=books.filter(b=>`${b.title}${b.author}`.toLowerCase().includes(searchQuery.toLowerCase()));
  let content='';
  if(dataState!=='ready') {
    const copy={loading:['正在寻找好书','加载状态示意，点击下方按钮查看结果。'],empty:['暂时没有找到','换个关键词，或看看为你推荐。'],error:['暂时无法获取数据','连接失败示意，你的阅读目标仍保存在本地。']}[dataState];
    content=`<div class="card status-box"><div class="eyebrow">${dataState==='loading'?'LOADING':dataState==='error'?'TRY AGAIN':'NOT FOUND'}</div><h3>${copy[0]}</h3><p>${copy[1]}</p><button class="secondary" data-action="retry">${dataState==='error'?'重试':'查看演示结果'}</button></div>`;
  } else if(discoverTab==='lists') content=renderLists(booklists.filter(l=>`${l.name}${l.description}`.includes(searchQuery)));
  else if(discoverTab==='books'||discoverTab==='recommend') content=`${discoverTab==='recommend'?'<div class="discovery-hero"><div class="eyebrow">PICKED FOR YOUR NEXT CHAPTER</div><h2>读过的书，会带你遇见下一本。</h2><p>根据你对文学与心理学的兴趣推荐 · 推荐理由为示例</p></div>':''}<div class="card panel"><div class="books full-books">${(discoverTab==='recommend'?matched.filter(b=>b.status==='wish'||b.id==='b0'):matched).map(bookCard).join('')||'<div class="empty">没有找到相关书籍，试试其他书名或作者。</div>'}</div></div>`;
  else if(discoverTab==='author') content=`<div class="card panel">${[...new Set(matched.map(b=>b.author))].map(name=>`<div class="book-row"><div class="avatar">${name.slice(0,1)}</div><div class="book-row-text"><b>${name}</b><p>作者结果 · 示例</p></div><button class="text-button" data-action="author-books" data-name="${esc(name)}">查看书籍 →</button></div>`).join('')||'<div class="empty">没有匹配的作者。</div>'}</div>`;
  else if(discoverTab==='all') content=`<div class="section-head"><h2>书籍</h2></div><div class="card panel"><div class="books">${matched.slice(0,4).map(bookCard).join('')||'<div class="empty">没有匹配的书籍。</div>'}</div></div><div class="section-head section-space"><h2>书单</h2></div>${renderLists(booklists.filter(l=>l.name.includes(searchQuery)))}`;
  else {
    const examples={novel:['星河来信','网文小说 · 示例作品','连载中 · 128 章'],audio:['夜晚的文学课','有声专辑 · 示例演播者','24 集 · 内容已完结'],fulltext:['关于阅读的一段文字','全文搜索 · 原创示例文本','阅读让日常拥有了更宽阔的边界。'],account:['一页书房','公众号 · 示例账号','记录阅读、日常与思考'],article:['如何为自己留一点阅读时间','文章 · 原创示例','2026-09-11 · 一页书房']}[discoverTab];
    const matches=!searchQuery||examples.join('').includes(searchQuery);
    content=matches?`<div class="card media-card"><div class="media-icon">${discoverTab==='audio'?'♫':'▤'}</div><div><h3>${examples[0]}</h3><p>${examples[1]}</p><p>${examples[2]}</p><button class="text-button" data-action="search-example" data-id="${discoverTab}">查看结果示意 →</button></div></div>`:'<div class="card empty">没有匹配的演示内容，可清空关键词查看该类型示意。</div>';
  }
  return welcome('下一本，遇见什么？','寻找一本书，也发现一份恰好适合你的书单。')+
    `<div class="toolbar"><label class="searchbox"><svg><use href="#search-icon"/></svg><input id="discover-search" aria-label="搜索发现内容" placeholder="书名、书单或关键词…" value="${esc(searchQuery)}"></label><label class="hint">预览状态 <select id="data-state" aria-label="预览数据状态">${[['ready','正常'],['loading','加载中'],['empty','空结果'],['error','失败']].map(([id,label])=>`<option value="${id}" ${dataState===id?'selected':''}>${label}</option>`).join('')}</select></label></div>${tabs(options,discoverTab,'discover-tab')}<div id="discover-results">${content}</div><p class="hint section-space">搜索、推荐、书单均为设计样例，未请求微信读书服务。</p>`;
}
function renderNotes() {
  const list=personalNotes.filter(note=>(noteBook==='all'||note.bookId===noteBook)&&(noteType==='all'||note.type===noteType));
  const counts=personalNotes.filter(note=>noteBook==='all'||note.bookId===noteBook);
  const bookmarks=noteBook==='all'?6:noteBook==='b0'?3:noteBook==='b1'?2:noteBook==='b2'?1:0;
  return welcome('把读过的，留在心里','划线、想法与每一次停顿，都有自己的意义。','<button class="secondary" data-action="export-notes">↓ 导出当前书目笔记</button>')+
    `<div class="notebook-grid"><aside class="card panel notebook-menu"><button data-action="notebook" data-id="all" class="${noteBook==='all'?'active':''}"><b>全部笔记本</b><small>4 本书 · 10 条笔记</small></button>${books.slice(0,4).map((b,i)=>`<button data-action="notebook" data-id="${b.id}" class="${noteBook===b.id?'active':''}"><b>${b.title}</b><small>${[4,3,2,1][i]} 条 · 含书签数量</small></button>`).join('')}</aside><div><div class="metrics-row"><span><strong>${counts.length+bookmarks}</strong>条笔记</span><span>划线 ${counts.filter(n=>n.type==='highlight').length}</span><span>想法 ${counts.filter(n=>n.type==='thought').length}</span><span>书签 ${bookmarks}</span></div>${tabs([['all','全部内容'],['highlight','划线'],['thought','想法 / 个人点评'],['bookmark','书签数量']],noteType,'note-type')}${noteType==='bookmark'?`<div class="card empty">${bookmarks} 个书签 · 当前接口只提供数量，不提供书签内容。</div>`:list.map(note=>`<article class="note-content"><span class="pill ${note.type==='thought'?'green':''}">${note.type==='thought'?'我的想法':'划线示意'}</span><blockquote>${note.text}</blockquote><small>《${findBook(note.bookId).title}》 · ${note.date}</small><p class="hint">原创示例文本，非书中原文</p><button class="text-button section-space" data-action="personal-note" data-id="${note.id}">查看笔记详情 →</button></article>`).join('')||'<div class="card empty">当前筛选没有笔记。</div>'}<p class="hint">总笔记数包含书签；导出包含划线和个人想法，不含公开点评及书签内容。</p></div></div>`;
}
function exportNotes() {
  // 导出按当前选中书目取划线和想法全集，内容类型筛选不影响导出完整性。
  const notes=personalNotes.filter(note=>noteBook==='all'||note.bookId===noteBook);
  const text='# 阅间笔记 · 演示数据\n\n原创示例，非书中原文。书签仅提供数量，不导出内容。\n\n'+notes.map(n=>`## ${findBook(n.bookId).title}\n\n${n.type==='thought'?'想法':'划线示意'} · ${n.date}\n\n${n.text}`).join('\n\n');
  const url=URL.createObjectURL(new Blob([text],{type:'text/markdown;charset=utf-8'}));
  showDetail('导出笔记', `<p class="hint">已生成当前书目的划线与想法。可下载 Markdown，或直接选中下方内容复制；不含书签内容。</p><textarea readonly class="export-preview" aria-label="笔记导出内容">${esc(text)}</textarea><div class="goal-actions"><a class="primary" style="text-decoration:none" href="${url}" download="阅间-演示笔记.md">下载 Markdown</a></div>`);
  $('#detail').addEventListener('close',()=>URL.revokeObjectURL(url),{once:true});
}
function openBook(id) { detailBook=id;bookTab='info';selectedChapter='all';renderBookDetail(); }
function renderBookDetail() {
  const book=findBook(detailBook);
  showDetail('书籍详情',`<div class="detail-body">${cover(book)}<div class="detail-info"><div class="eyebrow">READING SPACE / BOOK</div><h3>${book.title}</h3><p>${book.author}</p><p style="color:var(--green)">评分 ${Math.round(Number(book.score)*10)}/100 · 示例评分</p><p>${book.status==='done'?'已读完':`已读 ${book.progress}%`} · 累计 2小时18分钟</p><button class="primary" data-action="add-book" data-id="${book.id}">＋ 加入阅读目标</button></div></div><div class="detail-tabs">${[['info','简介'],['chapters','目录'],['notes','我的笔记'],['popular','热门划线'],['reviews','读者点评'],['similar','相似推荐']].map(([id,label])=>`<button data-action="book-tab" data-id="${id}" class="${bookTab===id?'active':''}">${label}</button>`).join('')}</div><div id="book-tab-content">${renderBookTab(book)}</div><p class="hint section-space">全部为设计示例 · 目录、文字和读者资料非真实接口内容。</p>`);
}
function renderBookTab(book) {
  if(bookTab==='info')return `<p class="detail-desc">${book.desc}</p><div class="book-details-grid section-space"><div><span>分类：</span>${book.id==='b1'?'科幻':'文学 / 人文'} · 示例</div><div><span>最近阅读：</span>2026-09-11</div><div><span>出版社：</span>示例出版社</div><div><span>译者 / ISBN：</span>暂无演示数据</div><div><span>字数：</span>约 20 万字 · 示例</div><div><span>出版日期：</span>暂无演示数据</div></div>`;
  if(bookTab==='chapters')return `<p class="hint">目录结构示意；选择章节可查看该章热门划线与热度。</p>${['序章 · 故事的开始','第一章 · 在旅途中','第二章 · 看见新的世界','第三章 · 留给自己的答案'].map((name,i)=>`<div class="chapter-row"><span>${String(i+1).padStart(2,'0')} &nbsp; ${name}<small style="color:var(--muted)"> · 示例章节</small></span><button class="text-button" data-action="chapter" data-id="${i}">划线热度 →</button></div>`).join('')}`;
  if(bookTab==='notes') {
    const notes=personalNotes.filter(n=>n.bookId===book.id);
    return notes.map(n=>`<div class="note-content"><span class="pill">${n.type==='thought'?'个人想法':'划线示意'}</span><blockquote>${n.text}</blockquote><small>${n.date} · 原创示例文本</small></div>`).join('')||'<div class="detail-empty">这本书暂无个人笔记示例。</div>';
  }
  if(bookTab==='popular')return `<div class="toolbar"><span class="hint">${selectedChapter==='all'?'全书':`示例章节 ${Number(selectedChapter)+1}`} · 热门划线最多展示 20 条</span><select id="chapter-filter" aria-label="选择热门划线章节"><option value="all">全部章节</option>${[0,1,2,3].map(i=>`<option value="${i}" ${String(i)===selectedChapter?'selected':''}>示例章节 ${i+1}</option>`).join('')}</select></div>${['阅读让我们有机会，在自己的生活之外再生活一次。','那些认真思考过的问题，会在未来的某一天回应你。'].map((text,i)=>`<article class="note-content"><span class="pill">${[1286,862][i]} 人划线 · 示例热度</span><blockquote>${text}</blockquote><small>原创示例文本，非书中原文</small><div class="section-space"><button class="text-button" data-action="highlight-thoughts" data-id="${i}">查看 ${[12,8][i]} 条想法 →</button></div></article>`).join('')}<p class="hint">章节热度提供人数与位置，原文来自热门划线；这里用示例文本说明展示方式。</p>`;
  if(bookTab==='reviews')return tabs([['全部','全部'],['推荐','推荐'],['一般','一般'],['不行','不行'],['最新','最新']],reviewFilter,'review-filter')+publicReviews.filter(r=>reviewFilter==='全部'||reviewFilter==='最新'||r.type===reviewFilter).map(review=>`<article class="review-row"><div class="meta"><b>${review.name} · 示例读者</b><span>${'★'.repeat(review.rating)}${'☆'.repeat(5-review.rating)}</span></div><p>${review.text}</p><div class="section-head section-space"><small class="hint">${review.date} · 公开点评示例</small><button class="text-button" data-action="review-detail" data-id="${review.id}">查看详情 →</button></div></article>`).join('');
  return `<p class="hint">相似推荐示例 · 根据主题与阅读兴趣推荐</p><div class="books section-space">${books.filter(b=>b.id!==book.id).slice(0,4).map(bookCard).join('')}</div>`;
}
function openThought(text, subtitle) { showDetail('想法详情',`<article class="note-content"><span class="pill">示例内容</span><blockquote>${esc(text)}</blockquote><small>${esc(subtitle)} · 2026-09-11</small></article><p class="hint">这里展示单条想法的完整内容；不生成未经接口提供的评论或点赞列表。</p>`); }
function handleAction(button) {
  const action=button.dataset.action,id=button.dataset.id;
  switch(action) {
    case 'page':navigate(id);break;
    case 'new-goal':openGoalEditor();break;
    case 'edit-goal':openGoalEditor(id);break;
    case 'goal-detail':openGoalDetail(id);break;
    case 'goal-filter':goalFilter=id;renderPage();break;
    case 'close-detail':$('#detail').close();break;
    case 'close-editor':$('#goal-editor').close();break;
    case 'pick-list':{
      const list=booklists.find(l=>l.id===id);list.ids.forEach(bookId=>draftIds.add(bookId));
      if(!draftSources.includes(list.name))draftSources.push(list.name);renderPicker();break;
    }
    case 'book':openBook(id);break;
    case 'list':openList(id);break;
    case 'add-book':chooseTarget([id]);break;
    case 'add-list':{const list=booklists.find(l=>l.id===id);chooseTarget(list.ids,[list.name]);break;}
    case 'append-goal':appendGoal(id);break;
    case 'new-with-selection':openGoalEditor(null,pendingBooks,pendingSources);break;
    case 'shelf-tab':shelfTab=id;renderPage();break;
    case 'period':period=id;renderPage();break;
    case 'discover-tab':discoverTab=id;renderPage();break;
    case 'retry':dataState='ready';renderPage();break;
    case 'notebook':noteBook=id;renderPage();break;
    case 'note-type':noteType=id;renderPage();break;
    case 'export-notes':exportNotes();break;
    case 'personal-note':{const note=personalNotes.find(n=>n.id===id);openThought(note.text,findBook(note.bookId).title+' · 个人笔记示例');break;}
    case 'book-tab':bookTab=id;renderBookDetail();break;
    case 'chapter':selectedChapter=id;bookTab='popular';renderBookDetail();break;
    case 'review-filter':reviewFilter=id;renderBookDetail();break;
    case 'review-detail':{const r=publicReviews.find(r=>r.id===id);openThought(r.text,r.name+' · 公开点评示例');break;}
    case 'highlight-thoughts':showDetail('划线下的想法',`<div class="note-original">${id==='0'?'阅读让我们有机会，在自己的生活之外再生活一次。':'那些认真思考过的问题，会在未来的某一天回应你。'}<p class="hint">原创划线示意</p></div><article class="review-row"><div class="meta"><b>山间来信 · 示例读者</b><span>2026-09-11</span></div><p>这句话让我想起，每一段阅读经历都有自己的时间。</p><button class="text-button section-space" data-action="thought-detail">查看完整想法 →</button></article><p class="hint">仅展示一条想法示例，真实内容需分页获取。</p>`);break;
    case 'thought-detail':openThought('这句话让我想起，每一段阅读经历都有自己的时间。','山间来信 · 公开想法示例');break;
    case 'author-books':searchQuery=button.dataset.name;discoverTab='books';$('#global-search').value=searchQuery;renderPage();break;
    case 'article-search':searchQuery='';discoverTab='article';navigate('discover');break;
    case 'search-example':openThought('这是此类搜索结果的详情布局示意。实际内容、可跳转地址及字段以未来接口返回为准。','搜索结果 · '+id);break;
    case 'year-report':showDetail('年度回顾',`<div class="discovery-hero"><div class="eyebrow">2026 / A YEAR IN BOOKS</div><h2>翻过的每一页，都算数。</h2><p>128小时42分钟 · 132 个阅读日 · 示例年度数据</p></div><p class="detail-desc">偏爱文学，习惯在夜晚阅读。每一次阅读，都是给自己的时间。</p><p class="hint section-space">年报布局示意，真实年度报告入口只使用服务端返回的链接。</p>`);break;
  }
}
document.addEventListener('click',event=>{
  const action=event.target.closest('[data-action]');if(action){handleAction(action);return;}
  const nav=event.target.closest('[data-page]');if(nav){searchQuery='';$('#global-search').value='';navigate(nav.dataset.page);}
});
document.addEventListener('change',event=>{
  if(event.target.matches('[data-pick-book]')){const id=event.target.dataset.pickBook;event.target.checked?draftIds.add(id):draftIds.delete(id);renderPicker();}
  if(event.target.id==='data-state'){dataState=event.target.value;renderPage();}
  if(event.target.id==='chapter-filter'){selectedChapter=event.target.value;renderBookDetail();}
});
$('#goal-start').onchange=()=>{$('#goal-end').min=$('#goal-start').value;};
$('#goal-name').oninput=()=>$('#goal-name').setCustomValidity('');
$('#goal-form').onsubmit=saveGoal;$('#picker-search').oninput=renderPicker;
$('#global-search').oninput=event=>{searchQuery=event.target.value.trim();dataState='ready';if(page!=='discover')discoverTab='books';navigate('discover');};
document.addEventListener('input',event=>{
  if(event.target.id==='discover-search'){
    const position=event.target.selectionStart;searchQuery=event.target.value;$('#global-search').value=searchQuery;renderPage();
    $('#discover-search').focus();$('#discover-search').setSelectionRange(position,position);
  }
});
document.addEventListener('keydown',event=>{if((event.metaKey||event.ctrlKey)&&event.key==='k'){event.preventDefault();$('#global-search').focus();}});
// 原生 dialog 提供焦点管理与 Escape 关闭；只有点击实际遮罩时才关闭。
document.querySelectorAll('dialog').forEach(dialog=>dialog.addEventListener('click',event=>{
  const rect=dialog.getBoundingClientRect();if(event.target===dialog&&(event.clientX<rect.left||event.clientX>rect.right||event.clientY<rect.top||event.clientY>rect.bottom))dialog.close();
}));
navigate('overview');if(storageWarning)toast(storageWarning);