import { PrismaClient } from '@prisma/client'
import dotenv from 'dotenv'

// Load .env file if it exists
dotenv.config()

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

// Detect database provider from environment (default to sqlite for local development)
const databaseProvider = process.env.DATABASE_PROVIDER || 'sqlite'

// Create PrismaClient with appropriate adapter
const createPrismaClient = () => {
  let client: PrismaClient
  
  if (databaseProvider === 'postgresql') {
    // Use PrismaPg adapter for PostgreSQL
    const { PrismaPg } = require('@prisma/adapter-pg')
    const pg = require('pg')
    const adapter = new PrismaPg({ connectionString: process.env.DATABASE_URL })
    client = new PrismaClient({ adapter })
  } else {
    // No adapter needed for SQLite
    client = new PrismaClient()
  }
  
  return client
}

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

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