import { v4 as uuidv4 } from 'uuid';

export abstract class DomainEvent {
  readonly eventId: string;
  readonly eventType: string;
  readonly aggregateId: string;
  readonly aggregateType: string;
  readonly occurredAt: Date;
  readonly version: number;

  constructor(params: {
    aggregateId: string;
    aggregateType: string;
    version?: number;
  }) {
    this.eventId = uuidv4();
    this.eventType = this.constructor.name;
    this.aggregateId = params.aggregateId;
    this.aggregateType = params.aggregateType;
    this.occurredAt = new Date();
    this.version = params.version ?? 1;
  }

  abstract getPayload(): unknown;
}