using System;
using System.Runtime.InteropServices;

public class MouseOperations
{
	[Flags]
	public enum MouseEventFlags
	{
		LeftDown = 0x00000002,
		LeftUp = 0x00000004,
		MiddleDown = 0x00000020,
		MiddleUp = 0x00000040,
		Move = 0x00000001,
		Absolute = 0x00008000,
		RightDown = 0x00000008,
		RightUp = 0x00000010
	}

	[DllImport ("user32.dll", EntryPoint = "SetCursorPos")]
	[return: MarshalAs (UnmanagedType.Bool)]
	private static extern bool SetCursorPos (int X, int Y);

	[DllImport ("user32.dll")]
	[return: MarshalAs (UnmanagedType.Bool)]
	private static extern bool GetCursorPos (out MousePoint lpMousePoint);

	[DllImport ("user32.dll")]
	private static extern void mouse_event (int dwFlags, int dx, int dy, int dwData, int dwExtraInfo);

	public static void SetCursorPosition (int X, int Y)
	{
		SetCursorPos (X, Y);
	}

	public static void SetCursorPosition (MousePoint point)
	{
		SetCursorPos (point.X, point.Y);
	}

	public static MousePoint GetCursorPosition ()
	{
		MousePoint currentMousePoint;
		var gotPoint = GetCursorPos (out currentMousePoint);
		if (!gotPoint) {
			currentMousePoint = new MousePoint (0, 0);
		}
		return currentMousePoint;
	}

	public static void MouseEvent (MouseEventFlags value)
	{
		MousePoint position = GetCursorPosition ();
		mouse_event
		((int)value, position.X, position.Y, 0, 0);
	}

	[StructLayout (LayoutKind.Sequential)]
	public struct MousePoint
	{
		public int X;
		public int Y;

		public MousePoint (int x, int y)
		{
			X = x;
			Y = y;
		}
	}
}