import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  CreateDateColumn,
  UpdateDateColumn,
  ManyToOne,
  OneToMany,
  JoinColumn,
} from 'typeorm';
import { Module } from '../modules/module.entity';
import { Activity } from '../activities/activity.entity';

@Entity({ name: 'lessons' })
export class Lesson {
  @PrimaryGeneratedColumn({ type: 'bigint' })
  id!: number;

  @Column({ type: 'bigint', name: 'module_id' })
  moduleId!: number;

  @ManyToOne(() => Module, (module) => module.lessons, { onDelete: 'CASCADE' })
  @JoinColumn({ name: 'module_id' })
  module?: Module;

  @Column({ length: 255 })
  title!: string;

  @Column({ type: 'text', nullable: true })
  description?: string;

  @Column({ name: 'order_index', type: 'int', default: 0 })
  orderIndex!: number;

  @Column({
    type: 'enum',
    enum: ['DRAFT', 'IN_REVIEW', 'PUBLISHED', 'ARCHIVED'],
    default: 'DRAFT',
  })
  status!: string;

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

  @UpdateDateColumn({ name: 'updated_at' })
  updatedAt!: Date;

  @OneToMany(() => Activity, (activity) => activity.lesson)
  activities?: Activity[];
}