// src/lib/prisma.ts
// ✅ CORRECCIÓN: Validación de DATABASE_URL + configuración del pool de conexiones

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

const globalForPrisma = global as unknown as { prisma: PrismaClient };

const connectionString = process.env.DATABASE_URL;

if (!connectionString) {
  throw new Error(
    "❌ DATABASE_URL is not defined. " +
    "Make sure it's set in your .env file or Docker environment variables. " +
    "Example: DATABASE_URL=postgresql://user:password@db:5432/flux"
  );
}

const pool = new Pool({ 
  connectionString,
  max: 10,                      // Máximo de conexiones simultáneas
  idleTimeoutMillis: 30000,     // Cerrar conexiones inactivas después de 30s
  connectionTimeoutMillis: 5000, // Timeout al intentar conectar
});

const adapter = new PrismaPg(pool as any);

export const prisma = globalForPrisma.prisma || new PrismaClient({ adapter });

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