import {
  Entity,
  PrimaryGeneratedColumn,
  Column,
  ManyToOne,
  JoinColumn,
  Index,
} from 'typeorm';
import { Transaction } from './transaction.entity';
import { Product } from '../../products/entities/product.entity';

@Entity('transaction_items')
export class TransactionItem {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column({ type: 'uuid' })
  @Index('idx_transaction_items_transaction')
  transactionId: string;

  @Column({ type: 'uuid' })
  @Index('idx_transaction_items_product')
  productId: string;

  @Column({ type: 'varchar', length: 255 })
  productName: string;

  @Column({ type: 'decimal', precision: 10, scale: 2 })
  price: number;

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

  @Column({ type: 'decimal', precision: 10, scale: 2 })
  lineTotal: number;

  // Relationships
  @ManyToOne(() => Transaction, (transaction) => transaction.items, {
    onDelete: 'CASCADE',
  })
  @JoinColumn({ name: 'transactionId' })
  transaction: Transaction;

  @ManyToOne(() => Product, (product) => product.transactionItems)
  @JoinColumn({ name: 'productId' })
  product: Product;
}