import { Injectable, OnModuleInit, OnModuleDestroy } from '@nestjs/common';
import { PrismaClient } from '@prisma/client';

/**
 * Global Prisma client wrapper.
 *
 * - `onModuleInit`: connects to the database so the first request
 *   does not pay the connection cost.
 * - `onModuleDestroy`: cleanly disconnects during shutdown.
 */
@Injectable()
export class PrismaService extends PrismaClient implements OnModuleInit, OnModuleDestroy {
  async onModuleInit(): Promise<void> {
    await this.$connect();
  }

  async onModuleDestroy(): Promise<void> {
    await this.$disconnect();
  }
}