import "server-only";
import { PrismaPg } from "@prisma/adapter-pg";
import { PrismaClient } from "@/generated/prisma/client";
import { getEnv } from "@/server/env";

/**
 * Cliente Prisma único por proceso.
 * En desarrollo se guarda en globalThis para sobrevivir al hot reload sin abrir conexiones nuevas.
 */
const globalForPrisma = globalThis as unknown as { prisma?: PrismaClient };

function createClient(): PrismaClient {
  const adapter = new PrismaPg({ connectionString: getEnv().DATABASE_URL });
  return new PrismaClient({ adapter });
}

export const db: PrismaClient = globalForPrisma.prisma ?? createClient();

if (process.env.NODE_ENV !== "production") {
  globalForPrisma.prisma = db;
}

/** Tipo del cliente transaccional que reciben los servicios que corren dentro de db.$transaction. */
export type DbClient = Omit<
  PrismaClient,
  "$connect" | "$disconnect" | "$on" | "$transaction" | "$extends"
>;