import { Global, Inject, Module, OnModuleDestroy } from '@nestjs/common';
import { createApplicationDatabase, type Database } from '@atlas/database';
import { APP_CONFIG, type AppConfig } from '../config/app-config.module.js';

export const DATABASE = Symbol('DATABASE');

@Global()
@Module({
    providers: [
        {
            provide: DATABASE,
            inject: [APP_CONFIG],
            // 业务代码只能拿到受限应用连接，迁移连接串绝不注入 API 容器。
            useFactory: (config: AppConfig): Database =>
                createApplicationDatabase(config.DATABASE_URL),
        },
    ],
    exports: [DATABASE],
})
export class DatabaseModule implements OnModuleDestroy {
    public constructor(@Inject(DATABASE) private readonly database: Database) {}
    public async onModuleDestroy() {
        // Nest 关闭时主动释放连接池，避免测试和热重启遗留连接。
        await this.database.close();
    }
}