import { NextRequest, NextResponse } from 'next/server'
import { getServerSession } from 'next-auth'
import { authOptions } from '@/lib/auth'
import { refreshUploadSession } from '@/lib/upload-sessions'

// Configure route
export const runtime = 'nodejs'
export const dynamic = 'force-dynamic'

/**
 * 刷新上传会话API
 * 用于会话过期后恢复上传，不清空已上传的分片记录
 *
 * POST /api/materials/upload/refresh
 * Body: { uploadId: string }
 *
 * 返回：
 * - success: true/false
 * - uploadId: string
 * - ttl: number (秒)
 */
export async function POST(req: NextRequest) {
  console.log(`[RefreshSession] 收到会话刷新请求 at ${new Date().toISOString()}`)

  try {
    // 验证用户身份
    const session = await getServerSession(authOptions)
    if (!session) {
      console.log(`[RefreshSession] 用户未登录`)
      return NextResponse.json({ error: '请先登录' }, { status: 401 })
    }

    // 解析请求参数
    const { uploadId } = await req.json()

    if (!uploadId) {
      console.log(`[RefreshSession] 缺少uploadId参数`)
      return NextResponse.json(
        { error: '缺少uploadId参数' },
        { status: 400 }
      )
    }

    console.log(`[RefreshSession] 尝试刷新会话: ${uploadId}, 用户: ${(session.user as any).id}`)

    // 刷新会话TTL
    const success = await refreshUploadSession(uploadId)

    if (!success) {
      console.log(`[RefreshSession] 会话不存在或已过期: ${uploadId}`)
      return NextResponse.json(
        { error: '会话不存在或已过期' },
        { status: 404 }
      )
    }

    console.log(`[RefreshSession] 会话刷新成功: ${uploadId}, TTL: 8小时`)

    return NextResponse.json({
      success: true,
      uploadId,
      ttl: 8 * 60 * 60  // 8小时（秒）
    })
  } catch (error) {
    console.error('[RefreshSession] 刷新会话失败:', error)
    return NextResponse.json(
      { error: '刷新会话失败' },
      { status: 500 }
    )
  }
}