import { PrismaClient } from '@prisma/client'

const connectionString = process.env.DATABASE_URL

if (!connectionString) {
  throw new Error('缺少数据库连接配置 DATABASE_URL')
}

const globalForPrisma = globalThis as typeof globalThis & {
  prisma?: PrismaClient
}

export const prisma = globalForPrisma.prisma || new PrismaClient()

if (process.env.NODE_ENV !== 'production') {
  globalForPrisma.prisma = prisma
}