import { Entity, Column, PrimaryGeneratedColumn, CreateDateColumn, UpdateDateColumn, ManyToOne, OneToMany } from 'typeorm';
import { Project } from '../projects/project.entity';
import { Supplier } from '../suppliers/supplier.entity';
import { Contract } from '../contracts/contract.entity';
import { PurchaseItem } from './purchase-item.entity';

@Entity('purchases')
export class Purchase {
  @PrimaryGeneratedColumn('uuid')
  id: string;

  @Column({ type: 'uuid', nullable: true })
  project_id: string;

  @ManyToOne(() => Project, project => project.purchases)
  project: Project;

  @Column({ type: 'uuid', nullable: true })
  supplier_id: string;

  @ManyToOne(() => Supplier, supplier => supplier.purchases)
  supplier: Supplier;

  @Column({ type: 'uuid', nullable: true })
  contract_id: string;

  @ManyToOne(() => Contract, contract => contract.purchases)
  contract: Contract;

  @Column({ type: 'decimal', precision: 18, scale: 2, nullable: false })
  total_amount: number;

  @Column({ type: 'varchar', length: 10, nullable: false })
  currency: string;

  @Column({ type: 'decimal', precision: 18, scale: 2, nullable: false })
  rmb_equivalent: number;

  @Column({ type: 'date', nullable: true })
  expected_delivery_date: Date;

  @Column({ type: 'varchar', length: 50, nullable: false })
  status: string;

  @CreateDateColumn()
  created_at: Date;

  @UpdateDateColumn()
  updated_at: Date;

  @OneToMany(() => PurchaseItem, purchaseItem => purchaseItem.purchase)
  purchase_items: PurchaseItem[];
}