import { NextResponse } from 'next/server'
import { cookies } from 'next/headers'
import db from '@/lib/db'
import { verifyJwt } from '@/lib/auth'

async function getSession() {
  const cookieStore = await cookies()
  const token = cookieStore.get('session_assets')?.value
  if (!token) return null
  return verifyJwt(token)
}

export async function GET() {
  const session = await getSession()
  if (!session) return NextResponse.json({ error: '未登录' }, { status: 401 })

  const total = (db.prepare('SELECT COUNT(*) as c FROM assets').get() as any).c

  const byStatus = db.prepare(
    'SELECT status, COUNT(*) as count FROM assets GROUP BY status ORDER BY count DESC'
  ).all()

  const byDeviceType = db.prepare(
    'SELECT device_type, COUNT(*) as count FROM assets GROUP BY device_type ORDER BY count DESC'
  ).all()

  const byManufacturer = db.prepare(
    "SELECT manufacturer, COUNT(*) as count FROM assets WHERE manufacturer IS NOT NULL AND manufacturer != '' GROUP BY manufacturer ORDER BY count DESC"
  ).all()

  const warrantySoon = (db.prepare(
    "SELECT COUNT(*) as c FROM assets WHERE warranty_date IS NOT NULL AND warranty_date != '' AND date(warranty_date) <= date('now', '+90 days') AND date(warranty_date) >= date('now')"
  ).get() as any).c

  const warrantyExpired = (db.prepare(
    "SELECT COUNT(*) as c FROM assets WHERE warranty_date IS NOT NULL AND warranty_date != '' AND date(warranty_date) < date('now')"
  ).get() as any).c

  const byRoom = db.prepare(
    "SELECT room, COUNT(*) as count FROM assets WHERE room IS NOT NULL AND room != '' GROUP BY room ORDER BY count DESC LIMIT 10"
  ).all()

  return NextResponse.json({
    total,
    byStatus,
    byDeviceType,
    byManufacturer,
    byRoom,
    warrantySoon,
    warrantyExpired,
  })
}