import { Unregisterable } from './shared';
import { AppAchievements } from './App';
import { Screenshot } from './Screenshots';

/**
 * Represents functions related to Steam Game Sessions.
 */
export interface GameSessions {
	/**
	 * Registers a callback function to be called when an achievement notification is received.
	 * @param callback The callback function to be called.
	 * @returns an object that can be used to unregister the callback.
	 */
	RegisterForAchievementNotification(callback: (notification: AchievementNotification) => void): Unregisterable;

	/**
	 * Registers a callback function to be called when an app lifetime notification is received.
	 * @param callback The callback function to be called.
	 * @returns an object that can be used to unregister the callback.
	 */
	RegisterForAppLifetimeNotifications(callback: (notification: AppLifetimeNotification) => void): Unregisterable;

	/**
	 * Registers a callback function to be called when a screenshot notification is received.
	 * @param callback The callback function to be called.
	 * @returns an object that can be used to unregister the callback.
	 */
	RegisterForScreenshotNotification(callback: (notification: ScreenshotNotification) => void): Unregisterable;
}

/**
 * @prop unAppID is not properly set by Steam for non-steam game shortcuts, so it defaults to 0 for them
 */
interface GameSessionNotificationBase {
	unAppID: number;
}

export interface AchievementNotification extends GameSessionNotificationBase {
	achievement: AppAchievements;
	nCurrentProgress: number;
	nMaxProgress: number;
}

export interface AppLifetimeNotification extends GameSessionNotificationBase {
	nInstanceID: number;
	bRunning: boolean;
}

export interface ScreenshotNotification extends GameSessionNotificationBase {
	details: Screenshot;
	hScreenshot: number;
	strOperation: 'deleted' | 'written';
}