// SPDX-FileCopyrightText: 2025 The Project Pterodactyl Developers
//
// SPDX-License-Identifier: MPL-2.0

import Foundation

public actor AsyncThunk<Value> {
	private var storage: Value?
	private var thunk: (() async -> Value)?

	public init(thunk: @escaping @Sendable () async -> Value) {
		self.thunk = thunk
	}

	public init(value: Value) {
		self.storage = value
	}

	public func value() async -> Value {
		if let storage { return storage }
		if let thunk {
			let computed = await thunk()
			self.storage = computed
			self.thunk = nil
			return computed
		}
		fatalError("AsyncThunk has neither thunk nor storage.")
	}
}