using System; 
using System.Runtime.InteropServices; 
using System.Reflection; 
using System.Threading;
using System.Diagnostics;
using System.Windows.Forms;
using System.Configuration;
using RUI;

namespace RUI.Listeners
{
	public enum MouseButtonState {Pressed,Released}    

    class MouseListener
    {
        public delegate void MouseMoveHandler(object inputListener, MouseMoveEventArgs mouseMoveInfo);
        public delegate void MouseButtonHandler(object inputListener, MouseButtonEventArgs mouseButtonInfo);

        public event MouseMoveHandler OnMouseMove;
        public event MouseButtonHandler OnMouseButton; 

        private static LowLevelMouseProc _proc;
        private static IntPtr _hookID = IntPtr.Zero;

        public MouseListener()
        {            
            _proc = HookCallback;
        }

        public void Stop()
        {            
            UnhookWindowsHookEx(_hookID);
        }

        public void Run()
        {
            _hookID = SetHook(_proc);
        }

        private static IntPtr SetHook(LowLevelMouseProc proc)
        {
            using (Process curProcess = Process.GetCurrentProcess())
            using (ProcessModule curModule = curProcess.MainModule)
            {
                return SetWindowsHookEx(WH_MOUSE_LL, proc,
                    GetModuleHandle(curModule.ModuleName), 0);
            }            
        }

        private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);

        private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
        {            

            if (nCode >= 0 && MouseMessages.WM_LBUTTONDOWN == (MouseMessages)wParam)
            {                
                //MSLLHOOKSTRUCT hookStruct = (MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));

                MouseButtonEventArgs MouseButtonInfo = new MouseButtonEventArgs(MouseButtons.Left, MouseButtonState.Pressed, DateTime.Now);

                if (OnMouseButton != null)
                {
                    OnMouseButton(this, MouseButtonInfo);
                }
            }
            else if (nCode >= 0 && MouseMessages.WM_RBUTTONDOWN == (MouseMessages)wParam)
            {                
                MouseButtonEventArgs MouseButtonInfo = new MouseButtonEventArgs(MouseButtons.Right, MouseButtonState.Pressed, DateTime.Now);

                if (OnMouseButton != null)
                {
                    OnMouseButton(this, MouseButtonInfo);
                }
            }
            else if (nCode >= 0 && MouseMessages.WM_MOUSEMOVE == (MouseMessages)wParam)
            {               
                MouseMoveEventArgs MouseMoveInfo = new MouseMoveEventArgs(Control.MousePosition.X, Control.MousePosition.Y, DateTime.Now);

                if (OnMouseMove != null)
                {
                    OnMouseMove(this, MouseMoveInfo);
                }
            }

            return CallNextHookEx(_hookID, nCode, wParam, lParam);
        }

        private const int WH_MOUSE_LL = 14;

        private enum MouseMessages
        {
            WM_LBUTTONDOWN = 0x0201,
            WM_LBUTTONUP = 0x0202,
            WM_MOUSEMOVE = 0x0200,
            WM_MOUSEWHEEL = 0x020A,
            WM_RBUTTONDOWN = 0x0204,
            WM_RBUTTONUP = 0x0205
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct POINT
        {
            public int x;
            public int y;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct MSLLHOOKSTRUCT
        {
            public POINT pt;
            public uint mouseData;
            public uint flags;
            public uint time;
            public IntPtr dwExtraInfo;
        }

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr SetWindowsHookEx(int idHook, LowLevelMouseProc lpfn, IntPtr hMod, uint dwThreadId);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool UnhookWindowsHookEx(IntPtr hhk);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr GetModuleHandle(string lpModuleName);

    }

    public class MouseMoveEventArgs : EventArgs
    {
        public MouseMoveEventArgs(int X, int Y, DateTime now)
        {
            this.X = X;
            this.Y = Y;
            CurrentTime = now;
        }
        public readonly int X;
        public readonly int Y;
        public readonly DateTime CurrentTime;
    }

    public class MouseButtonEventArgs : EventArgs
    {
        public MouseButtonEventArgs(MouseButtons Button, MouseButtonState buttonState, DateTime now)
        {
            CurrentTime = now;
            this.Button = Button;
            this.buttonState = buttonState;
        }
        public readonly MouseButtons Button;
        public readonly MouseButtonState buttonState;
        public readonly DateTime CurrentTime;
    } 
}//recorder NS ends