import { PrismaClient } from '@prisma/client'
import { PrismaPg } from '@prisma/adapter-pg'

const globalForPrisma = globalThis as unknown as {
  prisma: PrismaClient | undefined
}

const databaseUrl = process.env.DATABASE_URL

if (!databaseUrl) {
  throw new Error('DATABASE_URL environment variable is required.')
}

const createPrismaClient = () => {
  const adapter = new PrismaPg({ connectionString: databaseUrl })
  return new PrismaClient({ adapter })
}

export const prisma = globalForPrisma.prisma ?? createPrismaClient()

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