import { Global, Module } from '@nestjs/common';
import { APP_INTERCEPTOR } from '@nestjs/core';
import { TypeOrmModule } from '@nestjs/typeorm';

import { AuditController } from './audit.controller';
import { AuditInterceptor } from './audit.interceptor';
import { AuditLog } from './entities/audit-log.entity';
import { AuditLogRepository } from './audit-log.repository';
import { AuditService } from './audit.service';

/**
 * Backoffice audit trail.
 *
 * `AuditInterceptor` is bound through `APP_INTERCEPTOR`, so it applies to every
 * route in the application without touching the 488 mutating handlers
 * individually. Coverage therefore follows `AUDIT_ENDPOINTS`: a new route is
 * audited as soon as it appears in that map, and unknown routes are skipped
 * rather than recorded with an empty title.
 *
 * Global so other modules can inject `AuditService` to record domain events
 * that do not map cleanly onto an HTTP request.
 */
@Global()
@Module({
  imports: [TypeOrmModule.forFeature([AuditLog])],
  controllers: [AuditController],
  providers: [
    AuditLogRepository,
    AuditService,
    { provide: APP_INTERCEPTOR, useClass: AuditInterceptor },
  ],
  exports: [AuditService, AuditLogRepository],
})
export class AuditModule {}