using System;
using System.Drawing;
using System.Globalization;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using LunaWin.Properties;

namespace LunaWin
{
    class LunaIcon : IDisposable
    {
        [DllImport("UXTheme.dll", EntryPoint = "#138")]
        public static extern bool IsDarkMode();

        // Instantiate the icon object
        public LunaIcon()
        {
            //Globals.lunaIcon = new NotifyIcon();
        }

        // Display the icon in the systray
        // Invoke at application launch
        // Probably re-invoke when icon should be updated
        public void Display()
        {
            // TextInfo object for accessing ToTitleCase
            TextInfo txtInf = new CultureInfo("en-US", false).TextInfo;

            // get the current lunar phase
            LunaCalc lunaCalc = new LunaCalc();
            LunaPhase currentPhase = lunaCalc.CurrentPhase();

            // set icon resource name
            string IconName = txtInf.ToTitleCase(currentPhase.Id);

            OperatingSystem TheSystem = Environment.OSVersion;

            switch (TheSystem.Version.Major)
            {
                // windows 10 and 11 support light/dark modes
                case(10): case(11):
                    IconName += IsDarkMode() ? "Dark" : "Light";
                    break;
                // windows 8 is dark only
                case(8):
                    IconName += "Dark";
                    break;
               // windows vista and 7 use color icons
               default:
                    IconName += "Color";
                    break;
            }

            

            // set the icon resource
            Globals.lunaIcon.Icon = Resources.ResourceManager.GetObject(IconName) as Icon;

            // set the tooltip
            Globals.lunaIcon.Text = currentPhase.Name;

            // set the context menu
            Globals.lunaIcon.ContextMenuStrip = new LunaMenu().CreateMenu();

            // set icon visibility
            Globals.lunaIcon.Visible = true;
        }

        // Dispose of object instance on exit
        public void Dispose()
        {
            Globals.lunaIcon.Dispose();
        }
    }
}