import {
	BaseEvent,
	BaseEventDto,
	EventParams,
} from '@hg-ts/events';
import { v7 as uuid } from 'uuid';

import type {
	DtoSerializable,
	Identifiable,
} from '../types.js';

export const STORED_PROPERTY = Symbol('Domain event stored');

export type DomainEventDto = BaseEventDto & {
	id: string;
	entityName: string;
	entityId: string;
};

export type DomainEventParams<Body = unknown> = EventParams<Body> & {
	id?: string;
	entityName: string;
	entityId: string;
	[STORED_PROPERTY]?: true;
};


export class DomainEvent<Body = unknown> extends BaseEvent<Body>
	implements Identifiable, DtoSerializable<DomainEventDto> {
	public readonly id: string;
	public readonly entityName: string;
	public readonly entityId: string;
	public [STORED_PROPERTY]: boolean;

	public constructor(params: DomainEventParams<Body>) {
		super(params);

		this.id = params.id ?? DomainEvent.generateId();

		this.entityName = params.entityName;
		this.entityId = params.entityId;
		this[STORED_PROPERTY] = params[STORED_PROPERTY] ?? false;
	}

	public toDto(): DomainEventDto {
		return {
			id: this.id,
			entityId: String(this.entityId),
			entityName: this.entityName,
			name: this.name,
			body: this.body,
			occurredOn: this.occurredOn,
			traceId: this.traceId,
		};
	}

	public static generateId(): string {
		return uuid();
	}
}