using System;
using System.Drawing;
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")]
    [return: MarshalAs(UnmanagedType.Bool)]
    private static extern bool IsWindowEnabled(IntPtr hWnd);

	public static void Run(IntPtr windowHandle)
	{
		foreach(IntPtr window in BFS.Window.GetAllWindowHandles())
		{
            if(!IsPopupWindow(window))
                continue;
                
            //BFS.Dialog.ShowMessageInfo(BFS.Window.GetText(window));    
            BFS.Window.Focus(window);
		}
	}
	
	private static bool IsPopupWindow(IntPtr handle)
	{
        // child windows cannot have owners
        if((BFS.Window.GetWindowStyle(handle) & BFS.WindowEnum.WindowStyle.WS_CHILD__CHILDWINDOW) == BFS.WindowEnum.WindowStyle.WS_CHILD__CHILDWINDOW)
            return false;
            
        IntPtr owner = BFS.Window.GetOwner(handle);
        
        // not an owned window
        if(owner == IntPtr.Zero)
            return false;
            
        // window is enabled
        if(!IsWindowEnabled(handle))
            return false;
        
        // window has text
        if(String.IsNullOrEmpty(BFS.Window.GetText(handle)))
            return false;
            
        // owner is disabled
        if(IsWindowEnabled(owner))
            return false;
            
        return true;
	}
}