// ==============================================================================
// <品类名> · VOC 报告主渲染器（模板）
// ==============================================================================
// 职责：
//   - 定义 CHAPTERS 元信息（章 × 子章 × tone）
//   - 装配 Cover + Agenda + Divider + Sections + Coming Soon
//   - 生成完整 HTML（含 CSS + 导航 JS）
// ==============================================================================

const LA = require('./<品类>-analyze.js');
const C = require('./<品类>-components.js');
const { BRAND, esc, fmtLikes } = C;

// ==========================================================
// 1. 章节元信息
// TODO: 按 2.VOC深度思路.md 的章节骨架填写
// ==========================================================
const CHAPTERS = [
    {
        num: 1, key: 'challenge', title: '诘问起点', tone: 'urgent',
        subs: ['1-1', '1-2', '1-3'],
        heroLine: '<章 1 一句话总结>',
    },
    {
        num: 2, key: 'ch2', title: '<赛道 1> VOC', tone: 'critical',
        subs: ['2-1', '2-2', '2-3', '2-4'],
        heroLine: '<章 2 一句话总结>',
    },
    {
        num: 3, key: 'ch3', title: '<赛道 2> VOC', tone: 'analytical',
        subs: ['3-1', '3-2', '3-3', '3-4'],
        heroLine: '<章 3 一句话总结>',
    },
    {
        num: 4, key: 'kano', title: 'KANO × JTBD', tone: 'insight',
        subs: ['4-1', '4-2', '4-3', '4-4', '4-5'],
        heroLine: '<章 4 一句话总结>',
    },
    {
        num: 5, key: 'scene', title: '场景四元素地图', tone: 'empathy',
        subs: ['5-1', '5-2', '5-3', '5-4'],
        heroLine: '<章 5 一句话总结>',
    },
    {
        num: 6, key: 'competitor', title: '三轴 × 无人地带', tone: 'strategic',
        subs: ['6-1', '6-2', '6-3'],
        heroLine: '<章 6 一句话总结>',
    },
    {
        num: 7, key: 'opportunity', title: '新机会 × 新人群', tone: 'forward',
        subs: ['7-1', '7-2', '7-3'],
        heroLine: '<章 7 一句话总结>',
    },
    {
        num: 8, key: 'blueprint', title: '4P 配称蓝图', tone: 'blueprint',
        subs: ['8-1', '8-2'],
        heroLine: '<章 8 一句话总结>',
    },
];

// ==========================================================
// 2. Slide 渲染器集合（从各章节模块导入）
// ==========================================================
const SLIDE_RENDERERS = {
    ...require('./<品类>-ch1-challenge.js'),
    ...require('./<品类>-ch2-xxx.js'),
    ...require('./<品类>-ch3-xxx.js'),
    ...require('./<品类>-ch4-kano.js'),
    ...require('./<品类>-ch5-scene.js'),
    ...require('./<品类>-ch6-competitor.js'),
    ...require('./<品类>-ch7-opportunity.js'),
    ...require('./<品类>-ch8-blueprint.js'),
};

// ==========================================================
// 3. 封面
// ==========================================================
function renderCover(data) {
    const m = data.meta || {};
    const total = m.count || (data.items?.length || 0);
    const platforms = Object.entries(m.platforms || {})
        .map(([k, v]) => `${k}: ${v}`)
        .join(' · ');

    return `
    <section class="report-section cover" data-tone="hero">
      <div class="section-inner">
        <div class="text-mono text-xs" style="color:${BRAND.MAIN}; letter-spacing:0.25em; font-weight:700;">VOC DEEP INSIGHT · 反向定位</div>
        <h1 style="font-family:var(--font-head); font-weight:900; font-size:3.6rem; line-height:1.15; color:var(--text-1); margin:20px 0 16px 0;">
          <span style="color:${BRAND.MAIN};"><品类名></span><br/>
          VOC 深度洞察报告
        </h1>
        <div style="color:var(--text-2); font-size:1.1rem; line-height:1.75; max-width:800px; margin-bottom:32px;">
          基于<strong style="color:${BRAND.MAIN};">${total} 条真实 VOC</strong> × <strong>多平台</strong> × <strong>H1-H8 八大假设</strong>，从用户真实原声反向推演<strong><金额目标></strong>增长路径。
        </div>
        <div style="display:grid; grid-template-columns:repeat(4,1fr); gap:14px; max-width:900px;">
          <div style="padding:16px; background:${BRAND.MAIN}10; border:1px solid ${BRAND.MAIN}33; border-radius:8px;">
            <div style="color:${BRAND.MAIN}; font-family:var(--font-head); font-weight:900; font-size:1.8rem;">${total}</div>
            <div style="color:var(--text-2); font-size:0.82rem; margin-top:4px;">真实 VOC 条数</div>
          </div>
          <div style="padding:16px; background:${BRAND.JIANG_GREEN}10; border:1px solid ${BRAND.JIANG_GREEN}33; border-radius:8px;">
            <div style="color:${BRAND.JIANG_GREEN}; font-family:var(--font-head); font-weight:900; font-size:1.8rem;">${Object.keys(m.platforms || {}).length}</div>
            <div style="color:var(--text-2); font-size:0.82rem; margin-top:4px;">覆盖平台</div>
          </div>
          <div style="padding:16px; background:${BRAND.CORAL}10; border:1px solid ${BRAND.CORAL}33; border-radius:8px;">
            <div style="color:${BRAND.CORAL}; font-family:var(--font-head); font-weight:900; font-size:1.8rem;">${(m.products || []).length}</div>
            <div style="color:var(--text-2); font-size:0.82rem; margin-top:4px;">产品维度</div>
          </div>
          <div style="padding:16px; background:${BRAND.PURPLE}10; border:1px solid ${BRAND.PURPLE}33; border-radius:8px;">
            <div style="color:${BRAND.PURPLE}; font-family:var(--font-head); font-weight:900; font-size:1.8rem;">${CHAPTERS.length}</div>
            <div style="color:var(--text-2); font-size:0.82rem; margin-top:4px;">深度章节</div>
          </div>
        </div>
        <div style="margin-top:40px; color:var(--text-3); font-family:var(--font-mono); font-size:0.78rem;">
          ${platforms}<br/>
          采集时间: ${new Date(m.collected_at || Date.now()).toISOString().slice(0, 10)}
        </div>
      </div>
    </section>`;
}

// ==========================================================
// 4. 目录
// ==========================================================
function renderAgenda() {
    return `
    <section class="report-section agenda" data-tone="index">
      <div class="section-inner">
        <div class="text-mono text-xs" style="color:${BRAND.MAIN}; letter-spacing:0.2em; font-weight:700;">📋 AGENDA · 章节导航</div>
        <h2 style="font-family:var(--font-head); font-weight:800; font-size:2.4rem; margin:16px 0 32px 0; color:var(--text-1);">8 章 · ${CHAPTERS.reduce((s, c) => s + c.subs.length, 0)} 子章</h2>
        <div class="grid" style="grid-template-columns:1fr 1fr; gap:18px;">
          ${CHAPTERS.map((c) => `
          <a href="#${c.key}-divider" style="padding:18px 22px; background:var(--bg-1); border-left:4px solid ${BRAND.MAIN}; border-radius:6px; text-decoration:none; color:inherit; transition:background .15s;">
            <div style="display:flex; justify-content:space-between; align-items:baseline; margin-bottom:6px;">
              <div style="font-family:var(--font-head); font-weight:800; font-size:1.1rem; color:var(--text-1);">
                <span style="color:${BRAND.MAIN};">Ch${c.num}</span> · ${esc(c.title)}
              </div>
              <div class="text-mono text-xs" style="color:var(--text-3);">${c.subs.length} slides</div>
            </div>
            <div style="color:var(--text-2); font-size:0.86rem; line-height:1.6;">${esc(c.heroLine || '')}</div>
          </a>`).join('')}
        </div>
      </div>
    </section>`;
}

// ==========================================================
// 5. 章分隔
// ==========================================================
function renderDivider(chapter) {
    return `
    <section class="report-section divider" id="${chapter.key}-divider" data-tone="${chapter.tone}">
      <div class="section-inner" style="text-align:center; padding:120px 40px;">
        <div class="text-mono" style="color:${BRAND.MAIN}; letter-spacing:0.35em; font-size:1rem; font-weight:700;">CHAPTER ${chapter.num.toString().padStart(2, '0')}</div>
        <h1 style="font-family:var(--font-head); font-weight:900; font-size:5rem; line-height:1.05; color:var(--text-1); margin:28px 0;">${esc(chapter.title)}</h1>
        <div style="color:var(--text-2); font-size:1.15rem; max-width:800px; margin:0 auto; line-height:1.7;">${chapter.heroLine || ''}</div>
      </div>
    </section>`;
}

// ==========================================================
// 6. Coming Soon 占位
// ==========================================================
function renderComingSoon(chapter, subIdx) {
    return `
    <section class="report-section" id="${chapter.key}-${subIdx}" data-tone="${chapter.tone}">
      <div class="section-inner" style="padding:80px 40px; text-align:center;">
        <div class="text-mono text-xs" style="color:${BRAND.WARM_ORANGE || '#FF9F43'}; letter-spacing:0.2em;">COMING IN BATCH</div>
        <h2 style="font-family:var(--font-head); font-size:2.4rem; margin:20px 0; color:var(--text-1);">${chapter.num}.${subIdx} · 建设中</h2>
        <div style="color:var(--text-3);">此子章正在填充中</div>
      </div>
    </section>`;
}

// ==========================================================
// 7. CSS
// ==========================================================
const CSS = `
:root {
  --bg-0: #0A0A0A;
  --bg-1: #111111;
  --bg-2: #1A1A1A;
  --bg-3: #252525;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);
  --text-1: #F5F5F5;
  --text-2: #A8A8A8;
  --text-3: #6B6B6B;
  --font-head: 'Inter','Noto Sans SC','PingFang SC','Microsoft YaHei',system-ui,sans-serif;
  --font-mono: 'JetBrains Mono','SFMono-Regular',Consolas,monospace;
  --font-body: 'Inter','Noto Sans SC',system-ui,sans-serif;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}
* { box-sizing: border-box; }
body { font-family: var(--font-body); background: var(--bg-0); color: var(--text-1); margin: 0; line-height: 1.6; }
.text-mono { font-family: var(--font-mono); }
.text-xs { font-size: 0.72rem; }
.grid { display: grid; }
h1,h2,h3 { margin-top: 0; }
.report-section { min-height: 100vh; padding: 60px 48px; border-bottom: 1px solid var(--border); scroll-margin-top: 20px; }
.section-inner { max-width: 1280px; margin: 0 auto; }
.cover { background: linear-gradient(180deg, #0A0A0A 0%, #111 100%); }
.divider { background: linear-gradient(180deg, #0F0F0F 0%, #000 100%); display:flex; align-items:center; }
a { color: inherit; }
a:hover { opacity: 0.85; }
`;

// ==========================================================
// 8. 导航 JS
// ==========================================================
const NAV_JS = `
(function() {
    const sections = document.querySelectorAll('.report-section');
    let idx = 0;
    function go(i) {
        idx = Math.max(0, Math.min(sections.length - 1, i));
        sections[idx].scrollIntoView({ behavior: 'smooth' });
        if (sections[idx].id) history.replaceState(null, '', '#' + sections[idx].id);
    }
    document.addEventListener('keydown', (e) => {
        if (e.key === 'ArrowRight' || e.key === ' ') { e.preventDefault(); go(idx + 1); }
        if (e.key === 'ArrowLeft') { e.preventDefault(); go(idx - 1); }
        if (e.key === 'Home') go(0);
        if (e.key === 'End') go(sections.length - 1);
    });
    if (location.hash) {
        const i = [...sections].findIndex((s) => '#' + s.id === location.hash);
        if (i >= 0) idx = i;
    }
})();
`;

// ==========================================================
// 9. 主装配
// ==========================================================
function buildHTML(data) {
    const slides = [];
    slides.push(renderCover(data));
    slides.push(renderAgenda());

    const slideTotal = CHAPTERS.reduce((s, c) => s + c.subs.length, 0) + 2;
    let slideNum = 3;

    for (const chapter of CHAPTERS) {
        slides.push(renderDivider(chapter));
        for (const sub of chapter.subs) {
            const subIdx = sub.split('-')[1];
            const key = `${chapter.key}-${subIdx}`;
            const renderer = SLIDE_RENDERERS[key];
            if (!renderer) {
                slides.push(renderComingSoon(chapter, subIdx));
            } else {
                slides.push(renderer({ chapter, subIdx, sub, slideNum, slideTotal, data }));
            }
            slideNum++;
        }
    }

    return `<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8"/>
  <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
  <title><品类名> · VOC 深度洞察报告</title>
  <style>${CSS}</style>
</head>
<body>
${slides.join('\n')}
<script>${NAV_JS}</script>
</body>
</html>`;
}

module.exports = { buildHTML, CHAPTERS };