import { NextRequest, NextResponse } from 'next/server'
import { getServerSession } from 'next-auth'
import { authOptions } from '@/lib/auth'
import { isSuperAdmin } from '@/lib/department-permission'
import { getPublicTrafficStats, normalizeTrafficRange } from '@/lib/public-traffic-stats'

export const runtime = 'nodejs'
export const dynamic = 'force-dynamic'

export async function GET(request: NextRequest) {
  try {
    const session = await getServerSession(authOptions)
    const userId = (session?.user as any)?.id

    if (!session || !userId || !(await isSuperAdmin(userId))) {
      return NextResponse.json({ error: '需要超级管理员权限' }, { status: 403 })
    }

    const { searchParams } = new URL(request.url)
    const range = normalizeTrafficRange(searchParams.get('start'), searchParams.get('end'))
    const forceRefresh = searchParams.get('refresh') === '1' || searchParams.get('forceRefresh') === '1'
    const stats = await getPublicTrafficStats(range, { forceRefresh })

    return NextResponse.json(stats)
  } catch (error) {
    console.error('[admin/public-traffic] GET error:', error)
    return NextResponse.json({ error: '获取公网流量统计失败' }, { status: 500 })
  }
}