import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  CreateDateColumn,
  ManyToOne,
  JoinColumn,
} from 'typeorm';
import { QuestionBank } from './question-bank.entity';
import { AssessmentTemplate } from './assessment-template.entity';

/**
 * P1: Join table for QuestionBank <-> AssessmentTemplate many-to-many
 * Allows one question bank to be used across multiple templates.
 */
@Entity('question_bank_templates')
export class QuestionBankTemplate {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column({ name: 'bank_id' })
  bankId: string;

  @ManyToOne(() => QuestionBank, (bank) => bank.id, { onDelete: 'CASCADE' })
  @JoinColumn({ name: 'bank_id' })
  bank: QuestionBank;

  @Column({ name: 'template_id' })
  templateId: string;

  @ManyToOne(() => AssessmentTemplate, (tpl) => tpl.id, { onDelete: 'CASCADE' })
  @JoinColumn({ name: 'template_id' })
  template: AssessmentTemplate;

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