import { PrismaClient } from '@prisma/client'

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

function getDatasourceUrl(): string | undefined {
  const url = process.env.DATABASE_URL
  if (!url) return undefined
  // Append connection pool params if not already present
  if (url.includes('connection_limit')) return url
  const separator = url.includes('?') ? '&' : '?'
  return `${url}${separator}connection_limit=20&pool_timeout=10`
}

export const prisma =
  globalForPrisma.prisma ??
  new PrismaClient({
    datasourceUrl: getDatasourceUrl(),
    log:
      process.env.NODE_ENV === 'development'
        ? ['query', 'error', 'warn']
        : ['error'],
  })

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