+import EventEmitter from 'events'
+import type {
+ ErrorHandler,
+ ExitHandler,
+ MessageHandler,
+ OnlineHandler
+} from './pool-worker'
+import type { WorkerChoiceStrategy } from './selection-strategies/selection-strategies-types'
+
+/**
+ * Pool events emitter.
+ */
+export class PoolEmitter extends EventEmitter {}
+
+/**
+ * Options for a poolifier pool.
+ */
+export interface PoolOptions<Worker> {
+ /**
+ * A function that will listen for message event on each worker.
+ */
+ messageHandler?: MessageHandler<Worker>
+ /**
+ * A function that will listen for error event on each worker.
+ */
+ errorHandler?: ErrorHandler<Worker>
+ /**
+ * A function that will listen for online event on each worker.
+ */
+ onlineHandler?: OnlineHandler<Worker>
+ /**
+ * A function that will listen for exit event on each worker.
+ */
+ exitHandler?: ExitHandler<Worker>
+ /**
+ * The worker choice strategy to use in this pool.
+ */
+ workerChoiceStrategy?: WorkerChoiceStrategy
+ /**
+ * Pool events emission.
+ *
+ * @defaultValue true
+ */
+ enableEvents?: boolean
+}