+import type { Worker as ClusterWorker } from 'cluster'
+import type { MessagePort } from 'worker_threads'
+import type { AbstractPoolWorker } from './pools/abstract-pool-worker'
+import type { KillBehavior } from './worker/worker-options'
+
+/**
+ * Make all properties in T non-readonly.
+ */
export type Draft<T> = { -readonly [P in keyof T]?: T[P] }
-export interface MessageValue<Data> {
+/**
+ * Message object that is passed between worker and main worker.
+ */
+export interface MessageValue<
+ Data = unknown,
+ MainWorker extends ClusterWorker | MessagePort | unknown = unknown
+> {
+ /**
+ * Input data that will be passed to the worker.
+ */
readonly data?: Data
+ /**
+ * Id of the message.
+ */
readonly id?: number
- readonly kill?: number
+ /**
+ * Kill code.
+ */
+ readonly kill?: KillBehavior | 1
+ /**
+ * Error.
+ */
readonly error?: string
- readonly parent?: MessagePort
+ /**
+ * Task runtime.
+ */
+ readonly taskRunTime?: number
+ /**
+ * Reference to main worker.
+ *
+ * Only for internal use.
+ */
+ readonly parent?: MainWorker
+}
+
+/**
+ * An object holding the worker that will be used to resolve/rejects the promise later on.
+ *
+ * @template Worker Type of worker.
+ * @template Response Type of response of execution. This can only be serializable data.
+ */
+export interface PromiseWorkerResponseWrapper<
+ Worker extends AbstractPoolWorker,
+ Response = unknown
+> {
+ /**
+ * Resolve callback to fulfill the promise.
+ */
+ readonly resolve: (value: Response) => void
+ /**
+ * Reject callback to reject the promise.
+ */
+ readonly reject: (reason?: string) => void
+ /**
+ * The worker that has the assigned task.
+ */
+ readonly worker: Worker
}