import type { ActionInstance } from './ActionInstance';

import type { SpecialProperty } from './SpecialProperty';
import { getContext } from './utils/createActionProxy';
import { SpecialPropertyMessage } from '../messages/SpecialPropertyMessage';
import { SpecialPropertyOnlyClientMethodError } from './SpecialPropertyOnlyClientMethodError';


export class Event<T = any> implements SpecialProperty {

  public propertyName!: string;

  public meta = { typeName: 'event' };

  public action!: ActionInstance;

  public async emit(data: T) {
    const context = getContext(this.action);
    await context.controller.send(
      this.createMessage(data),
    );
  }

  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  public subscribe(cb: (data: T) => void) {
    throw new SpecialPropertyOnlyClientMethodError();
  }

  // eslint-disable-next-line @typescript-eslint/no-unused-vars
  public unsubscribe(cb: (data: T) => void): boolean {
    throw new SpecialPropertyOnlyClientMethodError();
  }

  public unsubscribeAll() {
    throw new SpecialPropertyOnlyClientMethodError();
  }

  protected createMessage(data: T): SpecialPropertyMessage {
    const context = getContext(this.action);
    const instanceId = context.getInstanceId();
    return {
      type: 'special',
      instanceId,
      actionName: context.actionBox.name,
      propertyName: this.propertyName,
      data,
    };
  }

}