import { PrimaryGeneratedColumn, Column, ManyToOne, Entity, TableInheritance } from "typeorm";
import {
  IsInt,
  IsNotEmpty,
  IsOptional,
  IsPositive,
} from "class-validator";
import { Participant } from "./Participant";

/**
 * Defines the donation interface.
*/
@Entity()
@TableInheritance({ column: { name: "type", type: "varchar" } })
export abstract class Donation {
  /**
   * Autogenerated unique id (primary key).
   */
  @PrimaryGeneratedColumn()
  @IsOptional()
  @IsInt()
  id: number;

  /**
   * The donations's donor.
   */
  @IsNotEmpty()
  @ManyToOne(() => Participant, donor => donor.donations, { nullable: true })
  donor: Participant;

  /**
   * The donation's amount in cents (or whatever your currency's smallest unit is.).
   * The exact implementation may differ for each type of donation.
   */
  abstract amount: number;
}