poly-weather/packages/core/src/db.ts

/**
 * Singleton Prisma client instance.
 */

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

// Global singleton to prevent multiple instances in development
const globalForPrisma = globalThis as unknown as { prisma: PrismaClient | undefined };

export const prisma = globalForPrisma.prisma ?? new PrismaClient({
  log: process.env['LOG_LEVEL'] === 'debug' ? ['query', 'info', 'warn', 'error'] : ['warn', 'error'],
});

if (process.env['NODE_ENV'] !== 'production') {
  globalForPrisma.prisma = prisma;
}