using System.Runtime.InteropServices;
using PInvoke;
using static PInvoke.Shell32;

namespace hass_desktop_service.StateDetectors.Windows.Fullscreen
{
public enum UserNotificationState
    {
        /// <summary>
        /// A screen saver is displayed, the machine is locked,
        /// or a nonactive Fast User Switching session is in progress.
        /// </summary>
        NotPresent = 1,

        /// <summary>
        /// A full-screen application is running or Presentation Settings are applied.
        /// Presentation Settings allow a user to put their machine into a state fit
        /// for an uninterrupted presentation, such as a set of PowerPoint slides, with a single click.
        /// </summary>
        Busy = 2,

        /// <summary>
        /// A full-screen (exclusive mode) Direct3D application is running.
        /// </summary>
        RunningDirect3dFullScreen = 3,

        /// <summary>
        /// The user has activated Windows presentation settings to block notifications and pop-up messages.
        /// </summary>
        PresentationMode = 4,

        /// <summary>
        /// None of the other states are found, notifications can be freely sent.
        /// </summary>
        AcceptsNotifications = 5,

        /// <summary>
        /// Introduced in Windows 7. The current user is in "quiet time", which is the first hour after
        /// a new user logs into his or her account for the first time. During this time, most notifications
        /// should not be sent or shown. This lets a user become accustomed to a new computer system
        /// without those distractions.
        /// Quiet time also occurs for each user after an operating system upgrade or clean installation.
        /// </summary>
        QuietTime = 6
    };

    public class UserNotificationStateDetector
    {
        [DllImport("shell32.dll")]
        static extern int SHQueryUserNotificationState(out UserNotificationState state);

        public UserNotificationState GetState(){
            UserNotificationState state;
            SHQueryUserNotificationState(out state);

            return state;
        }
    }
}