import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  CreateDateColumn,
  ManyToOne,
  JoinColumn,
  Unique,
} from 'typeorm';
import { Class } from './class.entity';
import { Student } from './student.entity';

@Entity('class_student')
@Unique(['classId', 'studentId'])
export class ClassStudent {
  @PrimaryGeneratedColumn()
  id: number;

  @Column({ name: 'class_id', type: 'integer' })
  classId: number;

  @ManyToOne(() => Class, { onDelete: 'CASCADE' })
  @JoinColumn({ name: 'class_id' })
  class: Class;

  @Column({ name: 'student_id', type: 'integer' })
  studentId: number;

  @ManyToOne(() => Student)
  @JoinColumn({ name: 'student_id' })
  student: Student;

  @Column({ name: 'join_date', type: 'date', nullable: true })
  joinDate: string | null;

  @Column({ name: 'leave_date', type: 'date', nullable: true })
  leaveDate: string | null;

  @Column({ name: 'status', length: 10, default: 'active' })
  status: string;

  @CreateDateColumn({ name: 'created_at' })
  createdAt: Date;
}