import { Collection, Entity, ManyToOne, OptionalProps, Property, OneToMany, Opt, Index } from '@mikro-orm/core';
import { Product } from 'src/modules/product/entities/product.entity';
import { BaseEntity } from 'src/common/entities/base.entity';
import { Invoice } from './invoice.entity';
import { Order } from 'src/modules/order/entities/order.entity';


@Entity({ tableName: 'invoice_items' })
@Index({ properties: ['invoice'] })
export class InvoiceItem extends BaseEntity {
  [OptionalProps]?: 'createdAt' | 'deletedAt' | 'discount' | 'description' | 'confirmedAt';

  @ManyToOne(() => Invoice)
  invoice!: Invoice;

  @ManyToOne(() => Product)
  product!: Product;

  @OneToMany(() => Order, order => order.invoiceItem)
  orders = new Collection<Order>(this);


  @Property({ type: 'int' })
  quantity!: number;

  @Property({ type: 'int', fieldName: 'unit_price' })
  unitPrice!: number;

  @Property({
    type: 'int',
    columnType: 'int GENERATED ALWAYS AS (COALESCE(unit_price, 0) * quantity) STORED',
    persist: false,
  })
  subTotal!: number & Opt;

  @Property({
    type: 'int',
    nullable: true
  })
  discount?: number;

  @Property({
    type: 'int',
    columnType: 'int GENERATED ALWAYS AS ((COALESCE(unit_price, 0) * quantity) - COALESCE(discount, 0)) STORED',
    persist: false
  })
  total!: number & Opt;

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


  @Property({ nullable: true, columnType: 'timestamptz' })
  confirmedAt?: Date;


}