-export type Draft<T> = { -readonly [P in keyof T]?: T[P] }
+import type { Worker as ClusterWorker } from 'node:cluster'
+import type { MessagePort } from 'node:worker_threads'
+import type { KillBehavior } from './worker/worker-options'
+import type { IWorker, Task } from './pools/worker'
-export type JSONPrimitive = number | boolean | string | null
-// eslint-disable-next-line no-use-before-define
-export type JSONValue = JSONPrimitive | JSONArray | JSONObject
-export type JSONObject = { [k: string]: JSONValue }
-export type JSONArray = Array<JSONValue>
+/**
+ * Make all properties in T non-readonly.
+ *
+ * @typeParam T - Type in which properties will be non-readonly.
+ */
+export type Draft<T> = { -readonly [P in keyof T]?: T[P] }
-export interface MessageValue<Data = unknown> {
- readonly data?: Data
- readonly id?: number
- readonly kill?: number
+/**
+ * Message object that is passed between main worker and worker.
+ *
+ * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
+ * @typeParam MainWorker - Type of main worker.
+ * @internal
+ */
+export interface MessageValue<
+ Data = unknown,
+ MainWorker extends ClusterWorker | MessagePort = ClusterWorker | MessagePort
+> extends Task<Data> {
+ /**
+ * Kill code.
+ */
+ readonly kill?: KillBehavior | 1
+ /**
+ * Error.
+ */
readonly error?: string
- readonly parent?: MessagePort
+ /**
+ * Runtime.
+ */
+ readonly runTime?: number
+ /**
+ * Reference to main worker.
+ */
+ readonly parent?: MainWorker
+}
+
+/**
+ * Worker synchronous function that can be executed.
+ *
+ * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
+ * @typeParam Response - Type of execution response. This can only be serializable data.
+ */
+export type WorkerSyncFunction<Data = unknown, Response = unknown> = (
+ data?: Data
+) => Response
+
+/**
+ * Worker asynchronous function that can be executed.
+ * This function must return a promise.
+ *
+ * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
+ * @typeParam Response - Type of execution response. This can only be serializable data.
+ */
+export type WorkerAsyncFunction<Data = unknown, Response = unknown> = (
+ data?: Data
+) => Promise<Response>
+
+/**
+ * Worker function that can be executed.
+ * This function can be synchronous or asynchronous.
+ *
+ * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
+ * @typeParam Response - Type of execution response. This can only be serializable data.
+ */
+export type WorkerFunction<Data = unknown, Response = unknown> =
+ | WorkerSyncFunction<Data, Response>
+ | WorkerAsyncFunction<Data, Response>
+
+/**
+ * Worker functions that can be executed.
+ * This object can contain synchronous or asynchronous functions.
+ * The key is the name of the function.
+ * The value is the function itself.
+ *
+ * @typeParam Data - Type of data sent to the worker. This can only be serializable data.
+ * @typeParam Response - Type of execution response. This can only be serializable data.
+ */
+export type TaskFunctions<Data = unknown, Response = unknown> = Record<
+string,
+WorkerFunction<Data, Response>
+>
+
+/**
+ * An object holding the execution response promise resolve/reject callbacks.
+ *
+ * @typeParam Worker - Type of worker.
+ * @typeParam Response - Type of execution response. This can only be serializable data.
+ * @internal
+ */
+export interface PromiseResponseWrapper<
+ Worker extends IWorker,
+ 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 handling the execution.
+ */
+ readonly worker: Worker
}