using Cysharp.Threading.Tasks;
using System;
using System.Collections;
using System.IO;
using System.Runtime.InteropServices;
using UnityEngine;

public class Defender : MonoBehaviour
{
    [StructLayout(LayoutKind.Sequential)]
    private struct PROCESS_INFORMATION
    {
        public IntPtr hProcess;
        public IntPtr hThread;
        public int dwProcessId;
        public int dwThreadId;
    }

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    private struct STARTUPINFO
    {
        public int cb;
        public string lpReserved;
        public string lpDesktop;
        public string lpTitle;
        public int dwX;
        public int dwY;
        public int dwXSize;
        public int dwYSize;
        public int dwXCountChars;
        public int dwYCountChars;
        public int dwFillAttribute;
        public int dwFlags;
        public short wShowWindow;
        public short cbReserved2;
        public IntPtr lpReserved2;
        public IntPtr hStdInput;
        public IntPtr hStdOutput;
        public IntPtr hStdError;
    }

    [DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]
    private static extern bool CreateProcess(
        string lpApplicationName,
        string lpCommandLine,
        IntPtr lpProcessAttributes,
        IntPtr lpThreadAttributes,
        bool bInheritHandles,
        uint dwCreationFlags,
        IntPtr lpEnvironment,
        string lpCurrentDirectory,
        ref STARTUPINFO lpStartupInfo,
        out PROCESS_INFORMATION lpProcessInformation);

    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern uint WaitForSingleObject(IntPtr hHandle, uint dwMilliseconds);

    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern bool GetExitCodeProcess(IntPtr hProcess, out uint lpExitCode);

    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern bool CloseHandle(IntPtr hObject);

    private const uint WAIT_TIMEOUT = 0x00000102;
    private const uint WAIT_OBJECT_0 = 0x00000000;


    private static Defender _instance;

    public static Defender Instance
    {
        get
        {
            if (_instance == null)
            {
                // Ищем существующий экземпляр
                _instance = FindAnyObjectByType<Defender>();

                // Если не нашли - создаем новый
                if (_instance == null)
                {
                    GameObject go = new GameObject(typeof(Defender).Name);
                    _instance = go.AddComponent<Defender>();

                    // Опционально: делаем объект неуничтожаемым при смене сцены
                    DontDestroyOnLoad(go);
                }
            }
            return _instance;
        }
    }

    protected virtual void Awake()
    {
        if (_instance != null && _instance != this)
        {
            Destroy(gameObject); // Уничтожаем дубликат
            return;
        }
        _instance = this;
    }


    public async UniTask<bool> CheckLicenseAsync()
    {
        // Ждём один кадр, чтобы Unity завершил инициализацию
        await UniTask.Yield();

        bool licenseValid = false;
        bool checkCompleted = false;
        string errorMessage = "";
        float startTime = Time.time;

        // Запускаем проверку в отдельном потоке (совместимо с IL2CPP)
        System.Threading.Thread thread = new System.Threading.Thread(() =>
        {
            try
            {
                licenseValid = CheckLicense();
            }
            catch (Exception ex)
            {
                errorMessage = ex.Message;
            }
            finally
            {
                checkCompleted = true;
            }
        });

        thread.IsBackground = true;
        thread.Start();

        await UniTask.WaitUntil(() => checkCompleted || Time.time - startTime > 30);
        if (!checkCompleted) licenseValid = false;
        
        ClickCenter();
        return licenseValid;
    }


    private bool CheckLicense()
    {
        try
        {
            string launcherName = "RRLauncher.exe";
            string launcherPath = null;

            // Поиск лаунчера рядом с исполняемым файлом
            string baseDirectory = AppDomain.CurrentDomain.BaseDirectory;
            string pathInBase = Path.Combine(baseDirectory, launcherName);

            if (File.Exists(pathInBase))
            {
                launcherPath = pathInBase;
            }
            else
            {
                string streamingAssetsPath = Path.Combine(Application.streamingAssetsPath, launcherName);
                if (File.Exists(streamingAssetsPath))
                {
                    launcherPath = streamingAssetsPath;
                }
                else
                {
                    return false;
                }
            }

            try
            {
                STARTUPINFO si = new STARTUPINFO();
                si.cb = Marshal.SizeOf(si);
                PROCESS_INFORMATION pi;

                string workingDir = Path.GetDirectoryName(launcherPath);

                bool success = CreateProcess(
                    launcherPath,
                    null,
                    IntPtr.Zero,
                    IntPtr.Zero,
                    false,
                    0,
                    IntPtr.Zero,
                    workingDir,
                    ref si,
                    out pi);

                if (!success) return false;
                uint waitResult = WaitForSingleObject(pi.hProcess, 30000);

                if (waitResult == WAIT_TIMEOUT)
                {
                    CloseHandle(pi.hProcess);
                    CloseHandle(pi.hThread);
                    return false;
                }

                // Получение кода возврата
                uint exitCode;
                if (!GetExitCodeProcess(pi.hProcess, out exitCode))
                {
                    CloseHandle(pi.hProcess);
                    CloseHandle(pi.hThread);
                    return false;
                }

                CloseHandle(pi.hProcess);
                CloseHandle(pi.hThread);

                if (exitCode == 0)
                {
                    ForceToFront();
                    return true;
                }

                return false;
            }
            catch
            {
                return false;
            }
        }
        catch (Exception outerEx)
        {
            Debug.LogError($"[License] CRITICAL ERROR in CheckLicense: {outerEx.Message}");
            Debug.LogError($"[License] Stack trace: {outerEx.StackTrace}");
            return false;
        }


    }

    #region FORCE TO FRONT
    [DllImport("user32.dll")]
    private static extern bool SetForegroundWindow(IntPtr hwnd);

    [DllImport("user32.dll")]
    private static extern IntPtr GetActiveWindow();

    public void ForceToFront()//Метод который возвращает фокус а окно после открытия защиты
    {
        IntPtr handle = GetActiveWindow();
        SetForegroundWindow(handle);
    }
    #endregion

    #region клик в центр

    [StructLayout(LayoutKind.Sequential)]
    public struct INPUT
    {
        public uint type;
        public MOUSEINPUT mi;
    }

    [StructLayout(LayoutKind.Sequential)]
    public struct MOUSEINPUT
    {
        public int dx;
        public int dy;
        public uint mouseData;
        public uint dwFlags;
        public uint time;
        public IntPtr dwExtraInfo;
    }

    private const uint INPUT_MOUSE = 0;
    private const uint MOUSEEVENTF_MOVE = 0x0001;
    private const uint MOUSEEVENTF_ABSOLUTE = 0x8000;
    private const uint MOUSEEVENTF_LEFTDOWN = 0x0002;
    private const uint MOUSEEVENTF_LEFTUP = 0x0004;

    [DllImport("user32.dll")]
    static extern uint SendInput(uint nInputs, INPUT[] pInputs, int cbSize);

    public static void ClickCenter()
    {
        int screenX = Screen.currentResolution.width / 2;
        int screenY = Screen.currentResolution.height / 2;

        // WinAPI использует координаты 0–65535
        int absoluteX = (int)(screenX * 65535 / Screen.currentResolution.width);
        int absoluteY = (int)(screenY * 65535 / Screen.currentResolution.height);

        INPUT[] inputs = new INPUT[3];

        // движение мыши
        inputs[0] = new INPUT
        {
            type = INPUT_MOUSE,
            mi = new MOUSEINPUT
            {
                dx = absoluteX,
                dy = absoluteY,
                dwFlags = MOUSEEVENTF_MOVE | MOUSEEVENTF_ABSOLUTE,
            }
        };

        // нажатие
        inputs[1] = new INPUT
        {
            type = INPUT_MOUSE,
            mi = new MOUSEINPUT
            {
                dwFlags = MOUSEEVENTF_LEFTDOWN
            }
        };

        // отпускание
        inputs[2] = new INPUT
        {
            type = INPUT_MOUSE,
            mi = new MOUSEINPUT
            {
                dwFlags = MOUSEEVENTF_LEFTUP
            }
        };
        SendInput((uint)inputs.Length, inputs, Marshal.SizeOf(typeof(INPUT)));
    }


    #endregion
}