import { Column, Entity, ManyToOne, PrimaryGeneratedColumn } from 'typeorm';
import { Collection } from './collection';
import { Work } from './work';

/**
 * This entity orders works in a collection.
 * The main use case is chronological ordering.
 */
@Entity()
export class CollectionPart implements IIdentifiableEntity, IOrderableEntity {
  @PrimaryGeneratedColumn()
  public id: number;

  /**
   * the collection thw work is a part of
   */
  @ManyToOne(() => Collection, (collection: Collection) => collection.parts, {
    nullable: false,
    onDelete: 'CASCADE',
    onUpdate: 'CASCADE',
  })
  public collection: Promise<Collection>;

  /**
   * the work inside the collection
   */
  @ManyToOne(() => Work, (work: Work) => work.collectionParts, {
    nullable: false,
    onDelete: 'CASCADE',
    onUpdate: 'CASCADE',
  })
  public work: Promise<Work>;

  @Column({
    nullable: false,
    default: 0,
  })
  public order: number;
}