#!/usr/bin/env node
/**
 * 自动更新章节索引
 * 用法: node update-index.js
 */

const fs = require('fs');
const path = require('path');

const DATA_DIR = path.join(__dirname, 'data');
const INDEX_FILE = path.join(DATA_DIR, 'chapters-index.json');

function main() {
  const chapters = [];
  let id = 1;

  // 加载所有章节
  while (true) {
    const paddedId = id.toString().padStart(2, '0');
    const files = [
      path.join(DATA_DIR, `chapter-${id}.json`),
      path.join(DATA_DIR, `chapter-${paddedId}.json`)
    ];
    
    let data = null;
    for (const file of files) {
      try {
        const content = fs.readFileSync(file, 'utf8');
        data = JSON.parse(content);
        break;
      } catch (e) {}
    }
    
    if (!data) break;
    
    // 计算字数（排除空格和换行）
    const wordCount = (data.content || '').replace(/[\s\n]/g, '').length;
    
    chapters.push({
      id: data.id || id,
      title: data.title || `第${id}章`,
      subtitle: data.subtitle || '',
      desc: data.desc || (data.content ? data.content.substring(0, 100) + '...' : ''),
      wordCount: wordCount,
      status: data.status || '已完结',
      date: data.date || new Date().toISOString().split('T')[0]
    });
    
    id++;
  }

  // 检查小数章节
  for (let i = 1; i <= id + 10; i++) {
    const decimalId = i + 0.5;
    const file = path.join(DATA_DIR, `chapter-${decimalId}.json`);
    try {
      const content = fs.readFileSync(file, 'utf8');
      const data = JSON.parse(content);
      const wordCount = (data.content || '').replace(/[\s\n]/g, '').length;
      chapters.push({
        id: data.id || decimalId,
        title: data.title || `第${decimalId}章`,
        subtitle: data.subtitle || '',
        desc: data.desc || (data.content ? data.content.substring(0, 100) + '...' : ''),
        wordCount: wordCount,
        status: data.status || '已完结',
        date: data.date || new Date().toISOString().split('T')[0]
      });
    } catch (e) {}
  }

  // 按id排序
  chapters.sort((a, b) => parseFloat(a.id) - parseFloat(b.id));

  // 写入索引文件
  const index = {
    total: chapters.length,
    generated: new Date().toISOString(),
    chapters: chapters
  };

  fs.writeFileSync(INDEX_FILE, JSON.stringify(index, null, 2));
  console.log(`✅ 索引更新完成：${chapters.length} 章`);
}

main();