import {
  Column,
  CreateDateColumn,
  Entity,
  Index,
  JoinColumn,
  ManyToOne,
  PrimaryGeneratedColumn,
  UpdateDateColumn,
} from 'typeorm';
import { Character } from '../../characters/entities/character.entity';
import { ItemDefinition } from './item-definition.entity';

/**
 * One stack of one item definition owned by one character.
 *
 * Duplicate drops increment `quantity` (spec §28 allows duplicates and forbids
 * duplicate protection). Slice 0.5 equips a `CharacterItem.id`, never an
 * `ItemDefinition.id`.
 */
@Entity({ name: 'character_items' })
@Index('IDX_character_items_character_item', ['characterId', 'itemDefinitionId'], {
  unique: true,
})
export class CharacterItem {
  @PrimaryGeneratedColumn('uuid', { name: 'id' })
  id!: string;

  @Column({ name: 'character_id', type: 'uuid' })
  characterId!: string;

  @Column({ name: 'item_definition_id', type: 'uuid' })
  itemDefinitionId!: string;

  @Column({ name: 'quantity', type: 'integer' })
  quantity!: number;

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

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

  @ManyToOne(() => Character, { onDelete: 'CASCADE' })
  @JoinColumn({ name: 'character_id' })
  character!: Character;

  @ManyToOne(() => ItemDefinition, { onDelete: 'RESTRICT' })
  @JoinColumn({ name: 'item_definition_id' })
  itemDefinition!: ItemDefinition;
}