import { Injectable, OnModuleInit, OnModuleDestroy } from '@nestjs/common';
import { ConfigService } from '@nestjs/config';
import { PrismaClient } from '../generated/prisma/client';
import { PrismaPg } from '@prisma/adapter-pg';

/**
 * NestJS-managed Prisma service for Prisma 7.
 *
 * Follows the official NestJS + Prisma 7 recipe:
 * - Uses `prisma-client` generator with `moduleFormat = "cjs"`
 * - Extends PrismaClient directly for full type-safe API access
 * - Uses PrismaPg driver adapter with connectionString
 *
 * Usage in feature modules:
 *   constructor(private readonly prisma: PrismaService) {}
 *   await this.prisma.placeholder.findMany();
 */
@Injectable()
export class PrismaService extends PrismaClient implements OnModuleInit, OnModuleDestroy {
  constructor(configService: ConfigService) {
    const databaseUrl = configService.getOrThrow<string>('DATABASE_URL');
    const adapter = new PrismaPg({ connectionString: databaseUrl });
    super({ adapter });
  }

  async onModuleInit(): Promise<void> {
    await this.$connect();
  }

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