#!/usr/bin/env node
/**
 * 彻底排查「段落间距」全链路：
 * 1. 该课程所有节点：outline.suggestedContent 按双换行拆段数 vs node_slides.content.paragraphs 数
 * 2. 调用 lesson detail API，核对返回的 blocks 数量与内容
 * 用法：node scripts/inspect-paragraphs-full.js <courseId>
 * 例：node scripts/inspect-paragraphs-full.js 08253870-7499-4f39-9fa1-9cb76c280770
 */

const { PrismaClient } = require('@prisma/client');
const http = require('http');
const prisma = new PrismaClient();

const API_BASE = process.env.API_BASE || 'http://127.0.0.1:3000';

function get(url) {
  return new Promise((resolve, reject) => {
    const u = new URL(url);
    const req = http.request(
      { hostname: u.hostname, port: u.port || 80, path: u.pathname + u.search, method: 'GET' },
      (res) => {
        let body = '';
        res.on('data', (ch) => { body += ch; });
        res.on('end', () => {
          try {
            resolve(JSON.parse(body));
          } catch (e) {
            reject(new Error('parse JSON: ' + body.slice(0, 200)));
          }
        });
      }
    );
    req.on('error', reject);
    req.setTimeout(8000, () => { req.destroy(); reject(new Error('timeout')); });
    req.end();
  });
}

async function main() {
  const courseId = process.argv[2] ? process.argv[2].trim() : null;
  if (!courseId) {
    console.log('用法: node scripts/inspect-paragraphs-full.js <courseId>');
    process.exit(1);
  }

  const task = await prisma.courseGenerationTask.findFirst({
    where: { courseId },
    orderBy: { createdAt: 'desc' },
    include: { course: { select: { id: true, title: true } } },
  });
  if (!task) {
    console.log('未找到 courseId 对应的任务:', courseId);
    return;
  }

  const outline = task.outline;
  if (!outline || !outline.chapters || !Array.isArray(outline.chapters)) {
    console.log('任务无 outline.chapters');
    return;
  }

  const outlineNodes = [];
  for (const ch of outline.chapters) {
    if (ch.nodes && Array.isArray(ch.nodes)) {
      for (const node of ch.nodes) {
        outlineNodes.push({
          title: node.title || '',
          suggestedContent: node.suggestedContent || '',
        });
      }
    }
  }

  const dbNodes = await prisma.courseNode.findMany({
    where: { courseId },
    orderBy: { orderIndex: 'asc' },
    include: { slides: { orderBy: { orderIndex: 'asc' } } },
  });

  console.log('=== 课程:', task.course?.title ?? courseId, '===');
  console.log('courseId:', courseId);
  console.log('taskId:', task.id);
  console.log('outline 小节总数:', outlineNodes.length);
  console.log('DB 节点总数:', dbNodes.length);
  console.log('');

  const rows = [];
  for (let i = 0; i < Math.max(outlineNodes.length, dbNodes.length); i++) {
    const oNode = outlineNodes[i];
    const dNode = dbNodes[i];
    let outlineParagraphs = 0;
    if (oNode && oNode.suggestedContent) {
      const split = oNode.suggestedContent.split(/\n\s*\n/).map((p) => p.trim()).filter((p) => p.length > 0);
      outlineParagraphs = split.length;
    }
    let slideParagraphs = 0;
    let nodeId = '';
    let nodeTitle = '';
    if (dNode) {
      nodeId = dNode.id;
      nodeTitle = dNode.title || '';
      const slide = dNode.slides && dNode.slides[0];
      if (slide && slide.content && typeof slide.content === 'object' && Array.isArray(slide.content.paragraphs)) {
        slideParagraphs = slide.content.paragraphs.length;
      }
    }
    const match = outlineParagraphs === slideParagraphs ? '✓' : '✗';
    rows.push({
      index: i + 1,
      nodeId,
      nodeTitle: nodeTitle.slice(0, 36) + (nodeTitle.length > 36 ? '…' : ''),
      outlineParagraphs,
      slideParagraphs,
      match,
    });
  }

  console.log('--- 全节点对比（outline 按双换行拆段数 vs node_slides.paragraphs 数）---');
  console.log('序号\toutline段数\tslide段数\t一致\t节点标题');
  rows.forEach((r) => {
    console.log(`${r.index}\t${r.outlineParagraphs}\t\t${r.slideParagraphs}\t\t${r.match}\t${r.nodeTitle}`);
  });
  const mismatchCount = rows.filter((r) => r.match === '✗').length;
  console.log('');
  if (mismatchCount > 0) {
    console.log('⚠️ 不一致节点数:', mismatchCount);
  } else {
    console.log('✓ 所有节点 outline 段数与 node_slides 段数一致');
  }
  console.log('');

  console.log('--- 调用 lesson detail API 核对（前 3 个节点）---');
  for (let i = 0; i < Math.min(3, dbNodes.length); i++) {
    const node = dbNodes[i];
    const nodeId = node.id;
    try {
      const res = await get(`${API_BASE}/api/lessons/nodes/${nodeId}/detail`);
      if (!res || !res.success || !res.data) {
        console.log(`节点 ${i + 1} (${nodeId}): API 返回异常`, res ? (res.error || res) : 'null');
        continue;
      }
      const blocks = res.data.blocks || [];
      const blockTypes = blocks.map((b) => b.type).join(', ');
      console.log(`节点 ${i + 1}: ${node.title?.slice(0, 32)}…`);
      console.log(`  nodeId: ${nodeId}`);
      console.log(`  API blocks 数量: ${blocks.length}`);
      console.log(`  block types: ${blockTypes}`);
      blocks.slice(0, 2).forEach((b, bi) => {
        console.log(`  block[${bi}] type=${b.type} contentLen=${(b.content || '').length} contentPreview=${JSON.stringify((b.content || '').slice(0, 50))}`);
      });
      const expectedBlocks = rows[i] ? rows[i].slideParagraphs : 0;
      if (blocks.length !== expectedBlocks) {
        console.log(`  ⚠️ 与 node_slides.paragraphs 数(${expectedBlocks}) 不一致`);
      }
      console.log('');
    } catch (e) {
      console.log(`节点 ${i + 1} (${nodeId}): 请求失败`, e.message);
      console.log('');
    }
  }

  console.log('--- 小结 ---');
  console.log('1. 上表：outline 段数 = suggestedContent 按 /\\n\\s*\\n/ 拆分后的段落数；slide 段数 = node_slides.content.paragraphs 长度');
  console.log('2. getLessonDetail 会把每个 slide 的 content.paragraphs 逐条转成 paragraph block，故 blocks 数应等于该节点 slide 的 paragraphs 数');
  console.log('3. iOS ContentBlockBuilder 在 index>0 的 block 前插入 paragraphSpacing(24pt)，多段即有多段间距');
}

main()
  .then(() => process.exit(0))
  .catch((e) => {
    console.error(e);
    process.exit(1);
  })
  .finally(() => prisma.$disconnect());