// ==============================================================================
// 乳酸菌 v2 · Ch2 成人→儿童 · 机会迁移（Step 3）
// ==============================================================================
// 2.1 成人 VOC 中的儿童信号扫描 · "妈妈/小孩/儿童"
// 2.2 家长购买决策路径 · 双决策者模型（家长买×孩子吃）
// 2.3 可迁移 vs 不可迁移 · 机会矩阵
// ==============================================================================

const LA = require('./lactic-analyze.js');
const C = require('./lactic-components.js');
const stripTags = s => String(s || '').replace(/#[^\s#]+/g, '').trim();
const { BRAND, esc, renderSectionHead, renderVocCard, renderVocGrid,
        renderStatStrip, renderMatrix2x2, renderCompareTable, renderInsightHero,
        renderFindingCard, renderDecisionList } = C;

// ============================================================
// 2.1 成人 VOC 中的儿童信号扫描
// ============================================================
function renderSub1({ chapter: c, subIdx, sub, slideNum, slideTotal, data, meta }) {
    const items = data?.items || [];

    // 筛选含"妈妈给孩子买"信号的 VOC
    const childSignalRe = /宝宝|小孩|孩子|女儿|儿子|闺女|给娃|幼儿园|入园|换季|积食|挑食|不爱吃饭|喂药/i;
    const childSignalItems = items.filter(it => childSignalRe.test(it.content || ''));

    // 按信号类型分组
    const signalTypes = [
        { name: '喂养难题', re: /挑食|不爱吃|喂药|难喂|吐出|抗拒/i, color: BRAND.CORAL },
        { name: '肠道症状', re: /腹泻|便秘|拉肚子|积食|消化|胃胀/i, color: BRAND.WARM_ORANGE },
        { name: '入园/换季生病', re: /入园|幼儿园|换季|感冒|生病|反复/i, color: BRAND.SKY_BLUE },
        { name: '抗生素后恢复', re: /抗生素|消炎|吃药后|用药后/i, color: BRAND.PURPLE },
        { name: '营养吸收', re: /吸收|营养|不长|偏瘦|光吃不长/i, color: BRAND.JIANG_GREEN },
    ];
    const signalStats = signalTypes.map(st => ({
        ...st,
        count: childSignalItems.filter(it => st.re.test(it.content || '')).length,
    }));

    const childProbRe = /益生菌|乳酸菌|肠|便秘|腹泻|消化|积食|拉肚|吸收|喂药|抗生素/i;
    const substantiveChild = childSignalItems.filter(it => stripTags(it.content).length >= 30 && childProbRe.test(stripTags(it.content)));
    const evidence = LA.getEvidence(substantiveChild, { top: 4, seed: 21, minChars: 20 });

    return `<section class="report-section" id="${c.key}-${subIdx}" data-tone="${c.tone}" data-slide-num="${slideNum}/${slideTotal}">
  <div class="section-inner">
    ${renderSectionHead({
        eyebrow: `${c.num}.${subIdx} · CHILD SIGNAL SCAN`,
        title: sub,
        subtitle: '王总要求："成人 VOC 中能不能扒拉出来跟儿童相关的？"',
        color: c.color,
    })}

    ${renderStatStrip([
        { num: items.length, label: '全部 VOC', color: 'var(--text-3)' },
        { num: childSignalItems.length, label: '含儿童信号', color: c.color },
        { num: Math.round(childSignalItems.length / Math.max(items.length, 1) * 100) + '%', label: '信号占比', color: c.color },
    ])}

    <div style="display:grid; grid-template-columns:repeat(5, 1fr); gap:12px; margin-top:24px;">
      ${signalStats.map(st => `
      <div style="padding:16px; background:${st.color}08; border:1px solid ${st.color}33; border-radius:var(--radius-sm); text-align:center;">
        <div style="font-family:var(--font-head); font-size:1.8rem; font-weight:800; color:${st.color};">${st.count}</div>
        <div style="color:var(--text-2); font-size:0.78rem; margin-top:4px;">${esc(st.name)}</div>
      </div>`).join('')}
    </div>

    <div style="margin-top:24px;">
      <div class="text-mono text-xs" style="color:${c.color}; letter-spacing:0.15em; margin-bottom:14px; font-weight:700;">儿童信号 VOC 原声</div>
      ${renderVocGrid(evidence, { columns: 2, accent: c.color })}
    </div>

    ${renderFindingCard({
        icon: '🔍',
        title: '信号扫描结论：肠道症状 + 喂养难题是最强儿童信号',
        body: '成人 VOC 中的儿童信号集中在两大方向：① <strong>肠道症状</strong>（腹泻/便秘/积食）——与成人需求直接重叠；② <strong>喂养难题</strong>（挑食/喂药难/抗拒）——这是儿童独有的痛点，也是咀嚼片剂型的核心优势所在。',
        accent: c.color,
    })}
  </div>
</section>`;
}

// ============================================================
// 2.2 家长购买决策路径 · 双决策者模型
// ============================================================
function renderSub2({ chapter: c, subIdx, sub, slideNum, slideTotal, data, meta }) {
    const items = data?.items || [];

    // 家长决策关键词
    const decisionFactors = [
        { factor: '安全性/成分', re: /安全|成分|无添加|天然|无糖|副作用/i, icon: '🛡️' },
        { factor: '效果可感知', re: /有效|管用|见效|好转|改善/i, icon: '✅' },
        { factor: '孩子接受度', re: /爱吃|好吃|口味|主动要|像奶片|像糖/i, icon: '😋' },
        { factor: '医生/专家推荐', re: /医生|儿科|推荐|开的|处方/i, icon: '👨‍⚕️' },
        { factor: '品牌信任', re: /品牌|江中|大牌|老牌|信任/i, icon: '🏷️' },
        { factor: '价格/性价比', re: /价格|便宜|贵|性价比|划算/i, icon: '💰' },
    ];
    const factorStats = decisionFactors.map(df => ({
        ...df,
        count: items.filter(it => df.re.test(it.content || '')).length,
    })).sort((a, b) => b.count - a.count);

    // 家长端 VOC：关注安全/成分/效果
    const parentRe = /安全|成分|副作用|医生|推荐|品牌|信任|放心|担心|焦虑/i;
    const parentItems = items.filter(it => parentRe.test(it.content || ''));
    const substParent = parentItems.filter(it => stripTags(it.content).length >= 30);
    const parentEvidence = LA.getEvidence(substParent, { top: 2, seed: 221, minChars: 20, contentMatch: /益生菌|乳酸菌|肠|便秘|消化|菌|拉肚/i });

    // 孩子端 VOC：关注口味/喂药难
    const childExpRe = /好吃|爱吃|像糖|像奶片|口味|不苦|酸甜|嚼|主动要|喂药难|不肯吃|吐出/i;
    const childExpItems = items.filter(it => childExpRe.test(it.content || ''));
    const substChild = childExpItems.filter(it => stripTags(it.content).length >= 25);
    const childEvidence = LA.getEvidence(substChild, { top: 2, seed: 222, minChars: 20, contentMatch: /益生菌|乳酸菌|肠|便秘|消化|菌|拉肚|好吃|爱吃|喂药|嚼/i });

    return `<section class="report-section" id="${c.key}-${subIdx}" data-tone="${c.tone}" data-slide-num="${slideNum}/${slideTotal}">
  <div class="section-inner">
    ${renderSectionHead({
        eyebrow: `${c.num}.${subIdx} · DUAL DECISION MODEL`,
        title: sub,
        subtitle: '儿童用药的特殊性：家长做决策（买），孩子做体验（吃）——两端都要满足。',
        color: c.color,
    })}

    <div style="display:grid; grid-template-columns:1fr 60px 1fr; gap:0; margin-top:24px; align-items:center;">
      <!-- 家长端 -->
      <div style="padding:24px; background:${BRAND.BERRY_PINK}08; border:2px solid ${BRAND.BERRY_PINK}44; border-radius:var(--radius-md);">
        <div class="text-mono text-xs" style="color:${BRAND.BERRY_PINK}; letter-spacing:0.15em; margin-bottom:14px; font-weight:700;">👩 家长端 · 决策者</div>
        <div style="color:var(--text-1); font-size:0.88rem; line-height:1.8;">
          <strong>核心驱动</strong>：孩子生病焦虑 → 搜索/咨询 → 品牌筛选 → 购买<br/>
          <strong>决策因素排序</strong>：<br/>
          ${factorStats.slice(0, 4).map((f, i) => `${f.icon} ${f.factor}（${f.count} 条 VOC 提及）<br/>`).join('')}
          <strong>关键矛盾</strong>：想要"药品级效果" + "食品级安全"
        </div>
        ${parentEvidence.length > 0 ? `
        <div style="margin-top:12px; padding-top:12px; border-top:1px dashed ${BRAND.BERRY_PINK}33;">
          <div style="color:${BRAND.BERRY_PINK}; font-size:0.68rem; font-weight:700; margin-bottom:6px;">家长决策 VOC 原声</div>
          ${parentEvidence.map(ev => `<div style="padding:6px 8px; background:${BRAND.BERRY_PINK}06; border-left:2px solid ${BRAND.BERRY_PINK}44; border-radius:3px; margin-bottom:5px; font-size:0.72rem; color:var(--text-1); line-height:1.45;">
            "${esc((ev.content || '').slice(0, 80))}"
            <div style="color:var(--text-3); font-size:0.6rem; margin-top:2px;">—${esc(ev.nickname || ev.platform)} · ❤️${ev.likes || 0}</div>
          </div>`).join('')}
        </div>` : ''}
      </div>

      <!-- 连接箭头 -->
      <div style="text-align:center; color:${c.color}; font-size:2rem;">→</div>

      <!-- 孩子端 -->
      <div style="padding:24px; background:${BRAND.SKY_BLUE}08; border:2px solid ${BRAND.SKY_BLUE}44; border-radius:var(--radius-md);">
        <div class="text-mono text-xs" style="color:${BRAND.SKY_BLUE}; letter-spacing:0.15em; margin-bottom:14px; font-weight:700;">👶 孩子端 · 体验者</div>
        <div style="color:var(--text-1); font-size:0.88rem; line-height:1.8;">
          <strong>核心驱动</strong>：好不好吃？像糖还是像药？<br/>
          <strong>体验因素排序</strong>：<br/>
          😋 口味口感（像奶片/酸甜/不苦）<br/>
          🎨 外观形状（卡通/颜色/大小）<br/>
          📏 方便服用（不用水/可嚼/便携）<br/>
          ⏱️ 服用频次（一天几次？会不会忘？）<br/>
          <strong>关键门槛</strong>：孩子不吃 = 再好的产品都白买
        </div>
        ${childEvidence.length > 0 ? `
        <div style="margin-top:12px; padding-top:12px; border-top:1px dashed ${BRAND.SKY_BLUE}33;">
          <div style="color:${BRAND.SKY_BLUE}; font-size:0.68rem; font-weight:700; margin-bottom:6px;">孩子体验 VOC 原声</div>
          ${childEvidence.map(ev => `<div style="padding:6px 8px; background:${BRAND.SKY_BLUE}06; border-left:2px solid ${BRAND.SKY_BLUE}44; border-radius:3px; margin-bottom:5px; font-size:0.72rem; color:var(--text-1); line-height:1.45;">
            "${esc((ev.content || '').slice(0, 80))}"
            <div style="color:var(--text-3); font-size:0.6rem; margin-top:2px;">—${esc(ev.nickname || ev.platform)} · ❤️${ev.likes || 0}</div>
          </div>`).join('')}
        </div>` : ''}
      </div>
    </div>

    ${renderInsightHero({
        eyebrow: 'KEY INSIGHT',
        title: '乳酸菌素片的"双端优势"：OTC 说服家长 + 奶片口感赢得孩子',
        subtitle: `王总原话："一个嚼着吃的调理肠道的产品，或者嚼着吃的一个像奶片一样的养护你肠道的东西。"——这就是双端都满足的产品形态。`,
        color: c.color,
    })}
  </div>
</section>`;
}

// ============================================================
// 2.3 可迁移 vs 不可迁移 · 机会矩阵
// ============================================================
function renderSub3({ chapter: c, subIdx, sub, slideNum, slideTotal, data, meta }) {
    return `<section class="report-section" id="${c.key}-${subIdx}" data-tone="${c.tone}" data-slide-num="${slideNum}/${slideTotal}">
  <div class="section-inner">
    ${renderSectionHead({
        eyebrow: `${c.num}.${subIdx} · MIGRATION MATRIX`,
        title: sub,
        subtitle: '哪些成人机会可以迁移到儿童？哪些不能？',
        color: c.color,
    })}

    ${renderMatrix2x2({
        xLabel: '儿童需求强度',
        yLabel: '成人验证程度',
        xLow: '儿童需求弱',
        xHigh: '儿童需求强',
        yLow: '成人验证弱',
        yHigh: '成人验证强',
        quadrants: {
            q1: {
                title: '★ 高价值迁移区',
                color: BRAND.JIANG_GREEN,
                items: [
                    '<strong>肠道日常调理</strong>（腹泻/便秘/消化不良）',
                    '<strong>抗生素后菌群恢复</strong>（儿童更高频）',
                    '<strong>咀嚼片剂型优势</strong>（奶片口感）',
                ],
                note: '→ 直接迁移，Ch3 交叉验证',
            },
            q2: {
                title: '需转化的机会',
                color: BRAND.WARM_ORANGE,
                items: [
                    '慢性胃炎调理（成人为主）',
                    '酒后/饮食不规律（成人场景）',
                ],
                note: '→ 不可迁移到儿童',
            },
            q3: {
                title: '低优先级',
                color: '#888',
                items: [
                    '旅行腹泻预防',
                    '减肥/肠道清理',
                ],
                note: '→ 放弃',
            },
            q4: {
                title: '儿童独有机会',
                color: BRAND.BERRY_PINK,
                items: [
                    '<strong>入园/换季反复生病</strong>（儿童独有）',
                    '<strong>营养吸收差/光吃不长</strong>（杨老师洞察）',
                    '<strong>"瓶瓶罐罐"替代</strong>（家长焦虑）',
                ],
                note: '→ Ch3 重点验证',
            },
        },
        accent: c.color,
    })}

    ${renderDecisionList([
        '<strong>可迁移 TOP3</strong>：肠道日常调理 + 抗生素后恢复 + 咀嚼片剂型',
        '<strong>不可迁移</strong>：慢性胃炎/酒后调理/减肥清肠（成人专属场景）',
        '<strong>儿童独有机会</strong>：入园生病/营养吸收/减少补剂——成人端无验证但儿童端需求强烈',
        '→ 下一步 Ch3：用儿童微生态竞品 VOC 反向交叉验证这些机会',
    ], { accent: c.color, title: 'MIGRATION VERDICT · 迁移结论' })}
  </div>
</section>`;
}

module.exports = { renderSub1, renderSub2, renderSub3 };