import { Module, OnModuleInit, Logger } from '@nestjs/common';
import { TypeOrmModule } from '@nestjs/typeorm';
import { SeedDevService } from './seed-dev.service';
import {
  Student, Room, Occupancy, RoomExpense,
  Bill, BillItem, User, Deposit,
  Classroom, Tenant, ClassroomRental, Permission, Role,
  Class, ClassStudent, ClassTeacher, ClassSchedule,
  AttendanceRecord,
  StudentProfile, StudentEnrollment, ExamScore, LearningRecord,
  ExpenseType,
} from '../entities';

const SEED_ENTITIES = [
  User, Role, Permission,
  Tenant, Student, Room, Classroom, Occupancy,
  RoomExpense, ExpenseType, Class,
  ClassStudent, ClassTeacher, ClassSchedule, Bill, BillItem,
  Deposit, AttendanceRecord,
  ClassroomRental, StudentProfile, StudentEnrollment,
  ExamScore, LearningRecord,
];

@Module({
  imports: [TypeOrmModule.forFeature(SEED_ENTITIES)],
  providers: [SeedDevService],
})
export class SeedModule implements OnModuleInit {
  private readonly logger = new Logger(SeedModule.name);

  constructor(private readonly seedService: SeedDevService) {}

  async onModuleInit() {
    const enabled = process.env['SEED_DEV'] === 'true';
    const skip = process.env['SEED_DEV_SKIP'] === 'true';

    if (!enabled || skip) {
      this.logger.log(
        `Seed skipped: SEED_DEV=${process.env['SEED_DEV']}, NODE_ENV=${process.env['NODE_ENV']}, SKIP=${skip}`,
      );
      return;
    }

    const studentCount = await this.seedService.getStudentCount();
    if (studentCount > 0) {
      this.logger.log(`Seed skipped: ${studentCount} students already exist`);
      return;
    }

    this.logger.log('Starting mock data seeding...');
    try {
      await this.seedService.seed();
      this.logger.log('Mock data seeding completed successfully');
    } catch (err) {
      this.logger.error('Mock data seeding failed', err instanceof Error ? err.stack : String(err));
    }
  }
}