/**
 * The `EventName` enumeration contains the names of all the available events in the Jan platform.
 */
export enum EventName {
  /** The `OnMessageSent` event is emitted when a message is sent. */
  OnMessageSent = "OnMessageSent",
  /** The `OnMessageResponse` event is emitted when a message is received. */
  OnMessageResponse = "OnMessageResponse",
  /** The `OnMessageUpdate` event is emitted when a message is updated. */
  OnMessageUpdate = "OnMessageUpdate",
  /** The `OnModelInit` event is emitted when a model inits. */
  OnModelInit = "OnModelInit",
  /** The `OnModelReady` event is emitted when a model ready. */
  OnModelReady = "OnModelReady",
  /** The `OnModelFail` event is emitted when a model fails loading. */
  OnModelFail = "OnModelFail",
  /** The `OnModelStop` event is emitted when a model start to stop. */
  OnModelStop = "OnModelStop",
  /** The `OnModelStopped` event is emitted when a model stopped ok. */
  OnModelStopped = "OnModelStopped",
}

/**
 * Adds an observer for an event.
 *
 * @param eventName The name of the event to observe.
 * @param handler The handler function to call when the event is observed.
 */
const on: (eventName: string, handler: Function) => void = (
  eventName,
  handler
) => {
  global.core?.events?.on(eventName, handler);
};

/**
 * Removes an observer for an event.
 *
 * @param eventName The name of the event to stop observing.
 * @param handler The handler function to call when the event is observed.
 */
const off: (eventName: string, handler: Function) => void = (
  eventName,
  handler
) => {
  global.core?.events?.off(eventName, handler);
};

/**
 * Emits an event.
 *
 * @param eventName The name of the event to emit.
 * @param object The object to pass to the event callback.
 */
const emit: (eventName: string, object: any) => void = (eventName, object) => {
  global.core?.events?.emit(eventName, object);
};

export const events = {
  on,
  off,
  emit,
};