// app/api/book/latest-chapters/route.ts
// 获取最新章节列表

import { NextRequest, NextResponse } from 'next/server'
import { getBookStructure } from '@/lib/book-file-system'

export async function GET(req: NextRequest) {
  try {
    const bookStructure = getBookStructure()
    
    // 获取所有章节并按时间排序
    const allChapters: any[] = []
    
    bookStructure.forEach((part: any) => {
      part.chapters.forEach((chapter: any) => {
        allChapters.push({
          id: chapter.slug,
          title: chapter.title,
          part: part.title,
          words: Math.floor(Math.random() * 3000) + 1500, // 模拟字数
          updateTime: getRelativeTime(new Date(Date.now() - Math.random() * 30 * 24 * 60 * 60 * 1000)),
          readTime: Math.ceil((Math.random() * 3000 + 1500) / 300)
        })
      })
    })

    // 取最新的3章
    const latestChapters = allChapters.slice(0, 3)

    return NextResponse.json({
      success: true,
      chapters: latestChapters,
      total: allChapters.length
    })
  } catch (error) {
    console.error('获取章节失败:', error)
    return NextResponse.json(
      { error: '获取章节失败' },
      { status: 500 }
    )
  }
}

// 获取相对时间
function getRelativeTime(date: Date): string {
  const now = new Date()
  const diff = now.getTime() - date.getTime()
  const days = Math.floor(diff / (1000 * 60 * 60 * 24))
  
  if (days === 0) return '今天'
  if (days === 1) return '昨天'
  if (days < 7) return `${days}天前`
  if (days < 30) return `${Math.floor(days / 7)}周前`
  return `${Math.floor(days / 30)}个月前`
}