import { EUIMode, Unregisterable } from './shared';
import { EOSType } from './system';

export interface UI {
	EnsureMainWindowCreated(): void;

	ExitBigPictureMode(): void;

	GetDesiredSteamUIWindows(): Promise<SteamWindow[]>;

	/**
	 * Gets information about whether your OS will be unsupported in the future or not.
	 */
	GetOSEndOfLifeInfo(): Promise<OSEndOfLifeInfo>;

	/**
	 * Retrieves the current UI mode.
	 * @returns the current UI mode.
	 */
	GetUIMode(): Promise<EUIMode>;

	NotifyAppInitialized(): void;

	RegisterDesiredSteamUIWindowsChanged(callback: () => void): Unregisterable;

	/**
	 * Registers a callback function to be called when a convar's value gets changed.
	 *
	 * Hard crashes if such a convar does not exist or if you can't set it.
	 *
	 * @param convar The ConVar to watch.
	 * @param callback The callback function to be called.
	 */
	RegisterForClientConVar(convar: string, callback: (value: string) => void): Unregisterable;

	/**
	 * @todo param{0,1} are enums
	 */
	RegisterForErrorCondition(callback: (param0: number, param1: number) => void): Unregisterable;

	RegisterForKioskModeResetSignal(callback: () => void): Unregisterable;

	/**
	 * @todo This fires multiple times.
	 */
	RegisterForStartupFinished(callback: () => void): Unregisterable;

	RegisterForUIModeChanged(callback: (mode: EUIMode) => void): Unregisterable;

	ResetErrorCondition(): void;

	/**
	 * Sets the UI mode to the specified value.
	 * @param mode The UI mode to set.
	 */
	SetUIMode(mode: EUIMode): void;
}

export enum EWindowType {
	MainGamepadUI,
	OverlayGamepadUI,
	Keyboard,
	ControllerConfigurator,
	VR,
	MainDesktopUI,
	DesktopLogin,
	OverlayDesktopUI,
	SteamChinaReviewLauncher,
}

export interface OSEndOfLifeInfo {
	bOSWillBeUnsupported: boolean;
	osType: EOSType;
}

/**
 * The following might have more correct information:
 * https://github.com/SteamDatabase/SteamTracking/blob/master/Protobufs/webuimessages_sharedjscontext.proto
 */
export interface SteamWindow {
	appid: number;
	hwndParent: number;
	nBrowserID: number;
	strAppName: string;
	unID: number;
	unPID: number;
	windowType: EWindowType;
	x: number;
	y: number;
}