using System;
using System.Drawing;
using System.Windows.Forms;
using System.Runtime.InteropServices;

// The 'windowHandle' parameter will contain the window handle for the:
//   - Active window when run by hotkey
//   - Trigger target when run by a Trigger rule
//   - TitleBar Button owner when run by a TitleBar Button
//   - Jump List owner when run from a Taskbar Jump List
//   - Currently focused window if none of these match
public static class DisplayFusionFunction
{
    [DllImport("user32.dll")]
    public static extern IntPtr SendMessage(IntPtr hWnd, uint msg, int wParam, int lParam);
    
    public static void Run(IntPtr windowHandle)
    {
        var appId = BFS.Application.GetAppIDByWindow(windowHandle);
        var sysTrayContainerHandle = BFS.Window.GetWindowByClass("Shell_TrayWnd");
        var sysTrayHandle = BFS.Window.GetChildWindowByClass(sysTrayContainerHandle, "TrayNotifyWnd");
        var sysPagerHandle = BFS.Window.GetChildWindowByClass(sysTrayHandle, "SysPager");
        var notificationAreaHandle = BFS.Window.GetChildWindowByClass(sysPagerHandle, "ToolbarWindow32");
        
        BFS.Application.Kill(appId);
        if (notificationAreaHandle == IntPtr.Zero)
        {
            var notifyIconOverflowWindowHandle = BFS.Window.GetWindowByClass("NotifyIconOverflowWindow");
            var overflowNotificationAreaHandle = BFS.Window.GetChildWindowByClass(notifyIconOverflowWindowHandle, "ToolbarWindow32");
            RefreshTrayArea(overflowNotificationAreaHandle);
        }
        RefreshTrayArea(notificationAreaHandle);
    }
    
    private static void RefreshTrayArea(IntPtr windowHandle)
    {
        const uint wmMousemove = 0x0200;
        var rect = BFS.Window.GetClientRect(windowHandle);
        
        for (var x = 0; x < rect.Right; x += 5)
            for (var y = 0; y < rect.Bottom; y += 5)
                SendMessage(windowHandle, wmMousemove, 0, (y << 16) + x);
    }
}