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

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

function createPrismaClient() {
  const connectionString = process.env.DATABASE_URL

  if (!connectionString) {
    console.error('DATABASE_URL is not set. Value:', connectionString)
    throw new Error('DATABASE_URL environment variable is not set')
  }

  const pool = new Pool({
    connectionString,
    max: 10,                  // Maximum connections in the pool
    idleTimeoutMillis: 30000, // Close idle connections after 30s
    connectionTimeoutMillis: 10000, // Fail if connection takes > 10s
  })
  const adapter = new PrismaPg(pool)
  return new PrismaClient({ adapter })
}

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

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

export default prisma