using System;
using System.Diagnostics;
using System.Drawing;
using System.Threading;
using WindowsInput.Events;

namespace MSFSPopoutPanelManager.Provider
{
    public class InputEmulationManager
    {
        const uint MOUSEEVENTF_ABSOLUTE = 0x8000;
        const uint MOUSEEVENTF_MOVE = 0x0001;
        const uint MOUSEEVENTF_LEFTDOWN = 0x02;
        const uint MOUSEEVENTF_LEFTUP = 0x04;
        const uint KEYEVENTF_EXTENDEDKEY = 0x01;
        const uint KEYEVENTF_KEYDOWN = 0x0;
        const uint KEYEVENTF_KEYUP = 0x2;
        const uint VK_RMENU = 0xA5;
        const uint VK_LMENU = 0xA4;
        const uint VK_LCONTROL = 0xA2;
        const uint VK_SPACE = 0x20;
        const uint VK_ENT = 0x0D;
        const uint KEY_0 = 0x30;

        public static void LeftClick(int x, int y)
        {
            PInvoke.SetCursorPos(x, y);
            Thread.Sleep(300);

            PInvoke.mouse_event(MOUSEEVENTF_LEFTDOWN, x, y, 0, 0);
            Thread.Sleep(200);
            PInvoke.mouse_event(MOUSEEVENTF_LEFTUP, x, y, 0, 0);
        }

        public static void LeftClickFast(int x, int y)
        {
            PInvoke.mouse_event(MOUSEEVENTF_LEFTDOWN, x, y, 0, 0);
            Thread.Sleep(50);
            PInvoke.mouse_event(MOUSEEVENTF_LEFTUP, x, y, 0, 0);
        }

        public static void PopOutPanel(int x, int y)
        {
            LeftClick(x, y);
            Thread.Sleep(300);

            PInvoke.SetCursorPos(x, y);
            Thread.Sleep(300);

            PInvoke.keybd_event(Convert.ToByte(VK_RMENU), 0, KEYEVENTF_EXTENDEDKEY, 0);
            PInvoke.mouse_event(MOUSEEVENTF_LEFTDOWN, x, y, 0, 0);
            Thread.Sleep(200);
            PInvoke.mouse_event(MOUSEEVENTF_LEFTUP, x, y, 0, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_RMENU), 0, KEYEVENTF_KEYUP, 0);
        }

        public static void CenterView(IntPtr hwnd)
        {
            Rectangle rectangle;
            PInvoke.GetWindowRect(hwnd, out rectangle);

            Rectangle clientRectangle;
            PInvoke.GetClientRect(hwnd, out clientRectangle);

            var x = Convert.ToInt32(rectangle.X + (clientRectangle.Width) * 0.5); 
            var y = Convert.ToInt32(rectangle.Y + (clientRectangle.Height) * 0.5);

            PInvoke.SetForegroundWindow(hwnd);
            LeftClick(x, y);

            // First center view using Ctrl-Space
            PInvoke.keybd_event(Convert.ToByte(VK_LCONTROL), 0, KEYEVENTF_KEYDOWN, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_SPACE), 0, KEYEVENTF_KEYDOWN, 0);
            Thread.Sleep(200);
            PInvoke.keybd_event(Convert.ToByte(VK_SPACE), 0, KEYEVENTF_KEYUP, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_LCONTROL), 0, KEYEVENTF_KEYUP, 0);
            Thread.Sleep(200);
        }

        public static void SaveCustomView(IntPtr hwnd, string keybinding)
        {
            uint customViewKey = (uint) (Convert.ToInt32(keybinding) + KEY_0);

            PInvoke.SetForegroundWindow(hwnd);
            Thread.Sleep(500);

            PInvoke.SetFocus(hwnd);
            Thread.Sleep(300);

            // Set view using Ctrl-Alt-0
            PInvoke.keybd_event(Convert.ToByte(VK_LCONTROL), 0, KEYEVENTF_KEYDOWN, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_LMENU), 0, KEYEVENTF_KEYDOWN, 0);
            PInvoke.keybd_event(Convert.ToByte(customViewKey), 0, KEYEVENTF_KEYDOWN, 0);
            Thread.Sleep(200);
            PInvoke.keybd_event(Convert.ToByte(customViewKey), 0, KEYEVENTF_KEYUP, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_LMENU), 0, KEYEVENTF_KEYUP, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_LCONTROL), 0, KEYEVENTF_KEYUP, 0);
        }

        public static void LoadCustomView(IntPtr hwnd, string keybinding)
        {
            uint customViewKey = (uint)(Convert.ToInt32(keybinding) + KEY_0);

            PInvoke.SetForegroundWindow(hwnd);
            Thread.Sleep(500);

            PInvoke.SetFocus(hwnd);
            Thread.Sleep(300);

            // First center view using Ctrl-Space
            PInvoke.keybd_event(Convert.ToByte(VK_LCONTROL), 0, KEYEVENTF_KEYDOWN, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_SPACE), 0, KEYEVENTF_KEYDOWN, 0);
            Thread.Sleep(200);
            PInvoke.keybd_event(Convert.ToByte(VK_SPACE), 0, KEYEVENTF_KEYUP, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_LCONTROL), 0, KEYEVENTF_KEYUP, 0);
            Thread.Sleep(200);

            // Then load view using Alt-0
            PInvoke.keybd_event(Convert.ToByte(VK_LMENU), 0, KEYEVENTF_KEYDOWN, 0);
            PInvoke.keybd_event(Convert.ToByte(customViewKey), 0, KEYEVENTF_KEYDOWN, 0);
            Thread.Sleep(200);
            PInvoke.keybd_event(Convert.ToByte(customViewKey), 0, KEYEVENTF_KEYUP, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_LMENU), 0, KEYEVENTF_KEYUP, 0);

        }

        public static void ToggleFullScreenPanel(IntPtr hwnd)
        {
            PInvoke.SetForegroundWindow(hwnd);
            Thread.Sleep(500);

            PInvoke.SetFocus(hwnd);
            Thread.Sleep(300);

            PInvoke.keybd_event(Convert.ToByte(VK_RMENU), 0, KEYEVENTF_KEYDOWN, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_ENT), 0, KEYEVENTF_KEYDOWN, 0);
            Thread.Sleep(200);
            PInvoke.keybd_event(Convert.ToByte(VK_ENT), 0, KEYEVENTF_KEYUP, 0);
            PInvoke.keybd_event(Convert.ToByte(VK_RMENU), 0, KEYEVENTF_KEYUP, 0);
        }

        public static void LeftClickReadyToFly()
        {
            var simualatorProcess = DiagnosticManager.GetSimulatorProcess();
            if (simualatorProcess != null)
            {
                var hwnd = simualatorProcess.Handle;

                PInvoke.SetForegroundWindow(hwnd);
                Thread.Sleep(500);

                Rectangle rectangle;
                PInvoke.GetWindowRect(hwnd, out rectangle);

                Rectangle clientRectangle;
                PInvoke.GetClientRect(hwnd, out clientRectangle);

                // For windows mode
                // The "Ready to Fly" button is at about 93% width, 91.3% height at the lower right corner of game window
                var x = Convert.ToInt32(rectangle.X + (clientRectangle.Width + 8) * 0.93);    // with 8 pixel adjustment
                var y = Convert.ToInt32(rectangle.Y + (clientRectangle.Height + 39) * 0.915);     // with 39 pixel adjustment

                LeftClick(x, y);    // set focus to game app
                Thread.Sleep(250);
                LeftClick(x, y);
                Thread.Sleep(250);

                //Debug.WriteLine($"Windows Mode 'Ready to Fly' button coordinate: {x}, {y}");

                // For full screen mode
                x = Convert.ToInt32(rectangle.X + (clientRectangle.Width) * 0.93);    
                y = Convert.ToInt32(rectangle.Y + (clientRectangle.Height) * 0.915);

                LeftClick(x, y);    // set focus to game app
                Thread.Sleep(250);
                LeftClick(x, y);
                Thread.Sleep(250);

                //Debug.WriteLine($"Full Screen Mode 'Ready to Fly' button coordinate: {x} , {y}");
            }
        }
    }
}