using System;
using System.Drawing;
using System.Windows.Forms;

// The 'windowHandle' parameter will contain the window handle for the:
//   - Active window when run by hotkey
//   - Window Location target when run by a Window Location 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
{
	public static void Run(IntPtr windowHandle)
	{
		//if the passed window handle doesn't exist, exit the function
		if (windowHandle == IntPtr.Zero)
			return;
		
		//get the source windows for each monitor
		IntPtr[] srcWindowsMonitor2 = BFS.Window.GetVisibleWindowHandlesByMonitor(2);
		IntPtr[] srcWindowsMonitor1 = BFS.Window.GetVisibleWindowHandlesByMonitor(1);
			
		//move all of the windows in the destination monitor to the source monitor
		foreach (IntPtr window in srcWindowsMonitor2)
		{
			//move the window to the other monitor
			BFS.Window.MoveToMonitor(1, window);
            
            //get the bounds for the window, and the monitor it's in
			Rectangle windowRect = BFS.Window.GetBounds(window);
			Rectangle monitorRect = BFS.Monitor.GetMonitorBoundsByWindow(window);
		
			//find the space on either side of the window
			int leftSpace = windowRect.X - monitorRect.X;
			int rightSpace = monitorRect.Width - (windowRect.X - monitorRect.X) - windowRect.Width;
			
			//if the leftspace is smaller, it is on the left side of monitor.
			//move it to the right
			if (leftSpace < rightSpace)
			{
				BFS.Window.SetLocation(window, monitorRect.X + monitorRect.Width - leftSpace - windowRect.Width, windowRect.Y);
				continue;
			}
			
			//if we got this far, window is on the right. move it to the left side
			monitorRect = BFS.Monitor.GetMonitorBoundsByWindow(window);
			BFS.Window.SetLocation(window, monitorRect.X + rightSpace, windowRect.Y);
		}
			
		//move all of the windows in the source monitor to the destination monitor
		foreach (IntPtr window in srcWindowsMonitor1)
		{
			//move the window to the other monitor
			BFS.Window.MoveToMonitor(2, window);
			
			//get the bounds for the window, and the monitor it's in
			Rectangle windowRect = BFS.Window.GetBounds(window);
			Rectangle monitorRect = BFS.Monitor.GetMonitorBoundsByWindow(window);
			
			//find the space on either side of the window
			int leftSpace =  windowRect.X - monitorRect.X;
			int rightSpace = monitorRect.Width - (windowRect.X - monitorRect.X) - windowRect.Width;
			
			//if the leftspace is smaller, it is on the left side of monitor.
			//move it to the right
			if (leftSpace < rightSpace)
			{
				BFS.Window.SetLocation(window, monitorRect.X + monitorRect.Width - leftSpace - windowRect.Width, windowRect.Y);
				continue;
			}
			
			//if we got this far, window is on the right. move it to the left side
			monitorRect = BFS.Monitor.GetMonitorBoundsByWindow(window);
			BFS.Window.SetLocation(window, monitorRect.X + rightSpace, windowRect.Y);
		}
	}
}