using System;
using System.Drawing;

// 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
{
	public static void Run(IntPtr windowHandle)
	{
        // Get the mouse co-ordinates and the current monitor ID
		int mouseX = BFS.Input.GetMousePositionX();
		int mouseY = BFS.Input.GetMousePositionY();
		uint currentMonitor = BFS.Monitor.GetMonitorIDByXY(mouseX, mouseY);

        // If the window isn't on the current monitor, move it
        // If it is, exit the script
        if (BFS.Monitor.GetMonitorIDByWindow(windowHandle) != currentMonitor)
            BFS.Window.MoveToMonitor(currentMonitor, windowHandle);
        else
            return;
	
		// Get the target monitor work area
		Rectangle monitorWorkArea = BFS.Monitor.GetMonitorWorkAreaByMouseCursor();
		
		// Get the bounds of the window
		Rectangle windowBounds = BFS.Window.GetBounds(windowHandle);
		
		// Calculate the new X,Y locations
		int windowTargetX = mouseX - (windowBounds.Width / 2);
		int windowTargetY = mouseY - (windowBounds.Height / 2);
		
		// Check if the window will fit on the monitor at the new location, if not, change the target X,Y values to keep it in the monitor
		int windowTargetWidth = windowBounds.Width;
		int windowTargetHeight = windowBounds.Height;
		
		if ((windowTargetX + windowBounds.Width) > (monitorWorkArea.X + monitorWorkArea.Width))
		{
            windowTargetX = (monitorWorkArea.X + monitorWorkArea.Width) - windowBounds.Width;
		}
		else if (windowTargetX < monitorWorkArea.X)
		{
            windowTargetX = monitorWorkArea.X;
		}
		
		if ((windowTargetY + windowBounds.Height) > (monitorWorkArea.Y + monitorWorkArea.Height))
		{
            windowTargetY = (monitorWorkArea.Y + monitorWorkArea.Height) - windowBounds.Height;
		}
		else if (windowTargetY < monitorWorkArea.Y)
		{
            windowTargetY = monitorWorkArea.Y;
		}
		
		BFS.Window.SetSizeAndLocation(windowHandle, windowTargetX, windowTargetY, windowTargetWidth, windowTargetHeight);
	}
}