using System;
using System.Runtime.InteropServices;
using UnityEngine;

/// <summary>
/// 跨平台系统控制器
/// 提供亮度、音量等系统级功能的真实控制
/// 支持 Windows、Android 等平台
/// </summary>
public static class WindowsSystemController
{
#if UNITY_STANDALONE_WIN && !UNITY_EDITOR
    
    #region Windows API 声明
    
    // 音量控制 API
    [DllImport("user32.dll")]
    private static extern void keybd_event(byte bVk, byte bScan, uint dwFlags, uint dwExtraInfo);

    [DllImport("user32.dll")]
    private static extern byte MapVirtualKey(uint uCode, uint uMapType);

    // 亮度控制 API
    [DllImport("dxva2.dll", SetLastError = true)]
    private static extern bool SetMonitorBrightness(IntPtr hMonitor, uint dwNewBrightness);

    [DllImport("dxva2.dll", SetLastError = true)]
    private static extern bool GetMonitorBrightness(IntPtr hMonitor, ref uint pdwMinimumBrightness, ref uint pdwCurrentBrightness, ref uint pdwMaximumBrightness);

    [DllImport("dxva2.dll", SetLastError = true)]
    private static extern bool GetNumberOfPhysicalMonitorsFromHMONITOR(IntPtr hMonitor, ref uint pdwNumberOfPhysicalMonitors);

    [DllImport("dxva2.dll", SetLastError = true)]
    private static extern bool GetPhysicalMonitorsFromHMONITOR(IntPtr hMonitor, uint dwPhysicalMonitorArraySize, [Out] PHYSICAL_MONITOR[] pPhysicalMonitorArray);

    [DllImport("user32.dll")]
    private static extern bool EnumDisplayMonitors(IntPtr hdc, IntPtr lprcClip, MonitorEnumDelegate lpfnEnum, IntPtr dwData);

    [DllImport("dxva2.dll", SetLastError = true)]
    private static extern bool DestroyPhysicalMonitors(uint dwPhysicalMonitorArraySize, [In] PHYSICAL_MONITOR[] pPhysicalMonitorArray);

    // WMI 相关 API (备用亮度控制方案)
    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern IntPtr LoadLibrary(string lpFileName);

    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern IntPtr GetProcAddress(IntPtr hModule, string lpProcName);

    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern bool FreeLibrary(IntPtr hModule);
    
    // 时间设置 API
    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern bool SetSystemTime(ref SYSTEMTIME lpSystemTime);
    
    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern void GetSystemTime(out SYSTEMTIME lpSystemTime);
    
    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern bool SetLocalTime(ref SYSTEMTIME lpSystemTime);
    
    [DllImport("kernel32.dll", SetLastError = true)]
    private static extern void GetLocalTime(out SYSTEMTIME lpSystemTime);
    
    #endregion

    #region 常量定义
    
    // 音量控制常量
    private const byte VK_VOLUME_MUTE = 0xAD;
    private const byte VK_VOLUME_DOWN = 0xAE;
    private const byte VK_VOLUME_UP = 0xAF;
    private const uint KEYEVENTF_EXTENDEDKEY = 0x0001;
    private const uint KEYEVENTF_KEYUP = 0x0002;
    
    #endregion

    #region 结构体定义
    
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public struct PHYSICAL_MONITOR
    {
        public IntPtr hPhysicalMonitor;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
        public string szPhysicalMonitorDescription;
    }

    private delegate bool MonitorEnumDelegate(IntPtr hMonitor, IntPtr hdcMonitor, ref Rect lprcMonitor, IntPtr dwData);

    [StructLayout(LayoutKind.Sequential)]
    public struct Rect
    {
        public int left;
        public int top;
        public int right;
        public int bottom;
    }
    
    [StructLayout(LayoutKind.Sequential)]
    public struct SYSTEMTIME
    {
        public ushort wYear;
        public ushort wMonth;
        public ushort wDayOfWeek;
        public ushort wDay;
        public ushort wHour;
        public ushort wMinute;
        public ushort wSecond;
        public ushort wMilliseconds;
    }
    
    #endregion

    #region 音量控制
    
    /// <summary>
    /// 设置系统音量到指定百分比
    /// </summary>
    /// <param name="volumePercent">音量百分比 (0-100)</param>
    public static bool SetSystemVolume(int volumePercent)
    {
        try
        {
            // 获取当前音量
            int currentVolume = GetCurrentSystemVolume();
            if (currentVolume == -1) return false;
            
            int targetVolume = Mathf.Clamp(volumePercent, 0, 100);
            int difference = targetVolume - currentVolume;
            
            // 根据差值调整音量
            if (difference > 0)
            {
                for (int i = 0; i < Math.Abs(difference); i += 2) // 每次大约调整2%
                {
                    SystemVolumeUp();
                    System.Threading.Thread.Sleep(10); // 短暂延时确保命令执行
                }
            }
            else if (difference < 0)
            {
                for (int i = 0; i < Math.Abs(difference); i += 2) // 每次大约调整2%
                {
                    SystemVolumeDown();
                    System.Threading.Thread.Sleep(10); // 短暂延时确保命令执行
                }
            }
            
            Debug.Log($"WindowsSystemController: 音量已设置为 {targetVolume}%");
            return true;
        }
        catch (Exception ex)
        {
            Debug.LogError($"WindowsSystemController: 设置音量失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 增加系统音量
    /// </summary>
    public static void SystemVolumeUp()
    {
        keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY, 0);
        keybd_event(VK_VOLUME_UP, MapVirtualKey(VK_VOLUME_UP, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
    }

    /// <summary>
    /// 降低系统音量
    /// </summary>
    public static void SystemVolumeDown()
    {
        keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY, 0);
        keybd_event(VK_VOLUME_DOWN, MapVirtualKey(VK_VOLUME_DOWN, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
    }

    /// <summary>
    /// 切换系统静音状态
    /// </summary>
    public static void SystemMute()
    {
        keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY, 0);
        keybd_event(VK_VOLUME_MUTE, MapVirtualKey(VK_VOLUME_MUTE, 0), KEYEVENTF_EXTENDEDKEY | KEYEVENTF_KEYUP, 0);
    }
    
    /// <summary>
    /// 获取当前系统音量 (简化估算，实际实现可能需要更复杂的 API)
    /// </summary>
    private static int GetCurrentSystemVolume()
    {
        // 这是一个简化版本，实际实现需要使用 Windows Volume API
        // 目前返回 -1 表示无法获取，使用相对调整
        return -1;
    }
    
    #endregion

    #region 亮度控制
    
    /// <summary>
    /// 设置显示器亮度
    /// </summary>
    /// <param name="brightnessPercent">亮度百分比 (0-100)</param>
    public static bool SetMonitorBrightness(int brightnessPercent)
    {
        try
        {
            uint brightness = (uint)Mathf.Clamp(brightnessPercent, 0, 100);
            
            // 方法1: 尝试使用 DXVA2 API
            if (SetBrightnessViaDDC(brightness))
            {
                Debug.Log($"WindowsSystemController: 亮度已通过DDC设置为 {brightness}%");
                return true;
            }
            
            // 方法2: 尝试使用 WMI (需要管理员权限)
            if (SetBrightnessViaWMI(brightness))
            {
                Debug.Log($"WindowsSystemController: 亮度已通过WMI设置为 {brightness}%");
                return true;
            }
            
            // 方法3: 使用 PowerShell 命令 (备用方案)
            if (SetBrightnessViaPowerShell(brightness))
            {
                Debug.Log($"WindowsSystemController: 亮度已通过PowerShell设置为 {brightness}%");
                return true;
            }
            
            Debug.LogWarning("WindowsSystemController: 所有亮度控制方法都失败了");
            return false;
        }
        catch (Exception ex)
        {
            Debug.LogError($"WindowsSystemController: 设置亮度失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 通过 DDC/CI 设置亮度 (外接显示器)
    /// </summary>
    private static bool SetBrightnessViaDDC(uint brightness)
    {
        try
        {
            bool success = false;
            EnumDisplayMonitors(IntPtr.Zero, IntPtr.Zero, (IntPtr hMonitor, IntPtr hdcMonitor, ref Rect lprcMonitor, IntPtr dwData) =>
            {
                uint numPhysicalMonitors = 0;
                if (GetNumberOfPhysicalMonitorsFromHMONITOR(hMonitor, ref numPhysicalMonitors) && numPhysicalMonitors > 0)
                {
                    PHYSICAL_MONITOR[] physicalMonitors = new PHYSICAL_MONITOR[numPhysicalMonitors];
                    
                    if (GetPhysicalMonitorsFromHMONITOR(hMonitor, numPhysicalMonitors, physicalMonitors))
                    {
                        for (uint i = 0; i < numPhysicalMonitors; i++)
                        {
                            if (SetMonitorBrightness(physicalMonitors[i].hPhysicalMonitor, brightness))
                            {
                                success = true;
                                Debug.Log($"成功设置显示器 {physicalMonitors[i].szPhysicalMonitorDescription} 亮度为 {brightness}%");
                            }
                        }
                        
                        DestroyPhysicalMonitors(numPhysicalMonitors, physicalMonitors);
                    }
                }
                return true; // 继续枚举
            }, IntPtr.Zero);
            
            return success;
        }
        catch (Exception ex)
        {
            Debug.LogError($"DDC亮度控制失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 通过 WMI 设置亮度 (笔记本内置屏幕)
    /// </summary>
    private static bool SetBrightnessViaWMI(uint brightness)
    {
        try
        {
            // 使用 WMI 设置亮度 (需要 System.Management 或者 PowerShell)
            // 这里使用简化的 PowerShell 调用方式
            string script = $"(Get-WmiObject -Namespace root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,{brightness})";
            return ExecutePowerShellCommand(script);
        }
        catch (Exception ex)
        {
            Debug.LogError($"WMI亮度控制失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 通过 PowerShell 设置亮度
    /// </summary>
    private static bool SetBrightnessViaPowerShell(uint brightness)
    {
        try
        {
            // 使用 Windows 10/11 的现代亮度控制
            string script = $@"
                Add-Type -AssemblyName System.Windows.Forms
                $brightness = {brightness}
                try {{
                    (Get-WmiObject -Namespace root/WMI -Class WmiMonitorBrightnessMethods).WmiSetBrightness(1,$brightness)
                    exit 0
                }} catch {{
                    exit 1
                }}
            ";
            
            return ExecutePowerShellCommand(script);
        }
        catch (Exception ex)
        {
            Debug.LogError($"PowerShell亮度控制失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 执行 PowerShell 命令
    /// </summary>
    private static bool ExecutePowerShellCommand(string script)
    {
        try
        {
            var processInfo = new System.Diagnostics.ProcessStartInfo
            {
                FileName = "powershell.exe",
                Arguments = $"-Command \"{script}\"",
                UseShellExecute = false,
                CreateNoWindow = true,
                RedirectStandardOutput = true,
                RedirectStandardError = true
            };
            
            using (var process = System.Diagnostics.Process.Start(processInfo))
            {
                process.WaitForExit(5000); // 5秒超时
                return process.ExitCode == 0;
            }
        }
        catch (Exception ex)
        {
            Debug.LogError($"PowerShell执行失败: {ex.Message}");
            return false;
        }
    }
    
    #endregion

#elif UNITY_ANDROID && !UNITY_EDITOR
    
    #region Android 实现
    
    private static AndroidJavaClass _unityPlayer;
    private static AndroidJavaObject _currentActivity;
    private static AndroidJavaObject _audioManager;
    
    /// <summary>
    /// 初始化Android系统控制
    /// </summary>
    static WindowsSystemController()
    {
        try
        {
            _unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            _currentActivity = _unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
            
            // 获取AudioManager
            _audioManager = _currentActivity.Call<AndroidJavaObject>("getSystemService", "audio");
            
            Debug.Log("Android系统控制器初始化成功");
        }
        catch (Exception ex)
        {
            Debug.LogError($"Android系统控制器初始化失败: {ex.Message}");
        }
    }
    
    /// <summary>
    /// 设置Android系统音量
    /// </summary>
    public static bool SetSystemVolume(int volumePercent)
    {
        try
        {
            if (_audioManager == null) return false;
            
            // 获取最大音量
            int maxVolume = _audioManager.Call<int>("getStreamMaxVolume", 3); // STREAM_MUSIC = 3
            
            // 计算目标音量
            int targetVolume = Mathf.RoundToInt((volumePercent / 100f) * maxVolume);
            targetVolume = Mathf.Clamp(targetVolume, 0, maxVolume);
            
            // 设置音量
            _audioManager.Call("setStreamVolume", 3, targetVolume, 0); // FLAG_SHOW_UI = 1, 不显示UI = 0
            
            Debug.Log($"Android: 音量已设置为 {volumePercent}% (系统值: {targetVolume}/{maxVolume})");
            return true;
        }
        catch (Exception ex)
        {
            Debug.LogError($"Android音量设置失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 增加Android系统音量
    /// </summary>
    public static void SystemVolumeUp()
    {
        try
        {
            if (_audioManager == null) return;
            
            _audioManager.Call("adjustStreamVolume", 3, 1, 0); // STREAM_MUSIC, ADJUST_RAISE, no flags
            Debug.Log("Android: 音量增加");
        }
        catch (Exception ex)
        {
            Debug.LogError($"Android音量增加失败: {ex.Message}");
        }
    }
    
    /// <summary>
    /// 降低Android系统音量
    /// </summary>
    public static void SystemVolumeDown()
    {
        try
        {
            if (_audioManager == null) return;
            
            _audioManager.Call("adjustStreamVolume", 3, -1, 0); // STREAM_MUSIC, ADJUST_LOWER, no flags
            Debug.Log("Android: 音量降低");
        }
        catch (Exception ex)
        {
            Debug.LogError($"Android音量降低失败: {ex.Message}");
        }
    }
    
    /// <summary>
    /// 切换Android系统静音
    /// </summary>
    public static void SystemMute()
    {
        try
        {
            if (_audioManager == null) return;
            
            // 获取当前音量
            int currentVolume = _audioManager.Call<int>("getStreamVolume", 3);
            
            if (currentVolume > 0)
            {
                // 静音
                _audioManager.Call("setStreamVolume", 3, 0, 0);
                Debug.Log("Android: 静音");
            }
            else
            {
                // 恢复到中等音量
                int maxVolume = _audioManager.Call<int>("getStreamMaxVolume", 3);
                _audioManager.Call("setStreamVolume", 3, maxVolume / 2, 0);
                Debug.Log("Android: 恢复音量");
            }
        }
        catch (Exception ex)
        {
            Debug.LogError($"Android静音切换失败: {ex.Message}");
        }
    }
    
    /// <summary>
    /// 设置Android屏幕亮度
    /// </summary>
    public static bool SetMonitorBrightness(int brightnessPercent)
    {
        try
        {
            if (_currentActivity == null) return false;
            
            // Android亮度范围是0-255
            float brightness = Mathf.Clamp01(brightnessPercent / 100f);
            int systemBrightness = Mathf.RoundToInt(brightness * 255f);
            
            // 方法1: 设置当前窗口亮度 (仅对当前应用生效)
            AndroidJavaObject window = _currentActivity.Call<AndroidJavaObject>("getWindow");
            AndroidJavaObject layoutParams = window.Call<AndroidJavaObject>("getAttributes");
            
            layoutParams.Set("screenBrightness", brightness); // 0.0f - 1.0f
            window.Call("setAttributes", layoutParams);
            
            Debug.Log($"Android: 应用窗口亮度已设置为 {brightnessPercent}%");
            
            // 方法2: 尝试设置系统亮度 (需要WRITE_SETTINGS权限)
            try
            {
                AndroidJavaClass settingsSystem = new AndroidJavaClass("android.provider.Settings$System");
                AndroidJavaObject contentResolver = _currentActivity.Call<AndroidJavaObject>("getContentResolver");
                
                bool success = settingsSystem.CallStatic<bool>("putInt", 
                    contentResolver, 
                    "screen_brightness", 
                    systemBrightness);
                    
                if (success)
                {
                    Debug.Log($"Android: 系统亮度已设置为 {brightnessPercent}%");
                }
                else
                {
                    Debug.LogWarning("Android: 系统亮度设置失败，可能缺少WRITE_SETTINGS权限");
                }
            }
            catch (Exception ex)
            {
                Debug.LogWarning($"Android系统亮度设置失败 (权限问题): {ex.Message}");
            }
            
            return true;
        }
        catch (Exception ex)
        {
            Debug.LogError($"Android亮度设置失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 获取当前Android音量
    /// </summary>
    public static int GetCurrentVolume()
    {
        try
        {
            if (_audioManager == null) return -1;
            
            int currentVolume = _audioManager.Call<int>("getStreamVolume", 3);
            int maxVolume = _audioManager.Call<int>("getStreamMaxVolume", 3);
            
            return Mathf.RoundToInt((currentVolume / (float)maxVolume) * 100f);
        }
        catch (Exception ex)
        {
            Debug.LogError($"获取Android音量失败: {ex.Message}");
            return -1;
        }
    }
    
    /// <summary>
    /// 获取当前Android亮度
    /// </summary>
    public static int GetCurrentBrightness()
    {
        try
        {
            if (_currentActivity == null) return -1;
            
            AndroidJavaClass settingsSystem = new AndroidJavaClass("android.provider.Settings$System");
            AndroidJavaObject contentResolver = _currentActivity.Call<AndroidJavaObject>("getContentResolver");
            
            int brightness = settingsSystem.CallStatic<int>("getInt", 
                contentResolver, 
                "screen_brightness", 
                128); // 默认值
                
            return Mathf.RoundToInt((brightness / 255f) * 100f);
        }
        catch (Exception ex)
        {
            Debug.LogError($"获取Android亮度失败: {ex.Message}");
            return -1;
        }
    }
    
    #endregion
    
    #region 时间控制
    
    /// <summary>
    /// 设置系统时间 - 跨平台实现
    /// </summary>
    /// <param name="dateTime">要设置的时间</param>
    /// <returns>设置是否成功</returns>
    public static bool SetSystemTime(DateTime dateTime)
    {
        #if UNITY_STANDALONE_WIN && !UNITY_EDITOR
        return SetWindowsSystemTime(dateTime);
        #elif UNITY_ANDROID && !UNITY_EDITOR
        return SetAndroidSystemTime(dateTime);
        #else
        Debug.Log($"[模拟] 系统时间设置为: {dateTime:yyyy-MM-dd HH:mm:ss}");
        return true;
        #endif
    }
    
    /// <summary>
    /// 获取当前系统时间 - 跨平台实现
    /// </summary>
    /// <returns>当前系统时间</returns>
    public static DateTime GetSystemTime()
    {
        #if UNITY_STANDALONE_WIN && !UNITY_EDITOR
        return GetWindowsSystemTime();
        #elif UNITY_ANDROID && !UNITY_EDITOR
        return GetAndroidSystemTime();
        #else
        return DateTime.Now;
        #endif
    }
    
    #if UNITY_STANDALONE_WIN && !UNITY_EDITOR
    
    /// <summary>
    /// Windows平台设置系统时间
    /// 注意：需要管理员权限
    /// </summary>
    private static bool SetWindowsSystemTime(DateTime dateTime)
    {
        try
        {
            SYSTEMTIME st = new SYSTEMTIME
            {
                wYear = (ushort)dateTime.Year,
                wMonth = (ushort)dateTime.Month,
                wDayOfWeek = (ushort)dateTime.DayOfWeek,
                wDay = (ushort)dateTime.Day,
                wHour = (ushort)dateTime.Hour,
                wMinute = (ushort)dateTime.Minute,
                wSecond = (ushort)dateTime.Second,
                wMilliseconds = (ushort)dateTime.Millisecond
            };
            
            bool result = SetLocalTime(ref st);
            
            if (result)
            {
                Debug.Log($"Windows: 系统时间已设置为 {dateTime:yyyy-MM-dd HH:mm:ss}");
            }
            else
            {
                Debug.LogWarning("Windows: 设置系统时间失败，可能需要管理员权限");
                
                // 尝试使用命令行方式
                return SetWindowsSystemTimeViaCommand(dateTime);
            }
            
            return result;
        }
        catch (Exception ex)
        {
            Debug.LogError($"Windows系统时间设置失败: {ex.Message}");
            return SetWindowsSystemTimeViaCommand(dateTime);
        }
    }
    
    /// <summary>
    /// 通过命令行设置Windows系统时间
    /// </summary>
    private static bool SetWindowsSystemTimeViaCommand(DateTime dateTime)
    {
        try
        {
            string dateCommand = $"date {dateTime:MM-dd-yyyy}";
            string timeCommand = $"time {dateTime:HH:mm:ss}";
            
            var processDate = new System.Diagnostics.Process
            {
                StartInfo = new System.Diagnostics.ProcessStartInfo
                {
                    FileName = "cmd.exe",
                    Arguments = $"/C {dateCommand}",
                    UseShellExecute = false,
                    CreateNoWindow = true,
                    Verb = "runas" // 以管理员身份运行
                }
            };
            
            var processTime = new System.Diagnostics.Process
            {
                StartInfo = new System.Diagnostics.ProcessStartInfo
                {
                    FileName = "cmd.exe",
                    Arguments = $"/C {timeCommand}",
                    UseShellExecute = false,
                    CreateNoWindow = true,
                    Verb = "runas" // 以管理员身份运行
                }
            };
            
            bool dateSuccess = processDate.Start() && processDate.WaitForExit(5000);
            bool timeSuccess = processTime.Start() && processTime.WaitForExit(5000);
            
            if (dateSuccess && timeSuccess)
            {
                Debug.Log($"Windows: 通过命令行设置系统时间成功 {dateTime:yyyy-MM-dd HH:mm:ss}");
                return true;
            }
            else
            {
                Debug.LogWarning("Windows: 命令行设置系统时间失败，可能被用户拒绝或超时");
                return false;
            }
        }
        catch (Exception ex)
        {
            Debug.LogError($"Windows命令行时间设置失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 获取Windows系统时间
    /// </summary>
    private static DateTime GetWindowsSystemTime()
    {
        try
        {
            GetLocalTime(out SYSTEMTIME st);
            return new DateTime(st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, st.wMilliseconds);
        }
        catch (Exception ex)
        {
            Debug.LogError($"获取Windows系统时间失败: {ex.Message}");
            return DateTime.Now;
        }
    }
    
    #endif
    
    #if UNITY_ANDROID && !UNITY_EDITOR
    
    /// <summary>
    /// Android平台设置系统时间
    /// 注意：需要WRITE_SECURE_SETTINGS权限，通常只有系统应用才能获得
    /// </summary>
    private static bool SetAndroidSystemTime(DateTime dateTime)
    {
        try
        {
            using (var unityClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer"))
            using (var currentActivity = unityClass.GetStatic<AndroidJavaObject>("currentActivity"))
            using (var contentResolver = currentActivity.Call<AndroidJavaObject>("getContentResolver"))
            {
                // Android系统时间是以毫秒为单位的时间戳
                long timeMillis = ((DateTimeOffset)dateTime).ToUnixTimeMilliseconds();
                
                try
                {
                    // 尝试设置系统时间 (需要系统权限)
                    var systemClock = new AndroidJavaClass("android.os.SystemClock");
                    bool result = systemClock.CallStatic<bool>("setCurrentTimeMillis", timeMillis);
                    
                    if (result)
                    {
                        Debug.Log($"Android: 系统时间已设置为 {dateTime:yyyy-MM-dd HH:mm:ss}");
                        return true;
                    }
                    else
                    {
                        Debug.LogWarning("Android: 设置系统时间失败，可能缺少WRITE_SECURE_SETTINGS权限");
                        
                        // 尝试使用AlarmManager设置（备用方案）
                        return SetAndroidTimeViaAlarmManager(currentActivity, dateTime);
                    }
                }
                catch (Exception ex)
                {
                    Debug.LogWarning($"Android直接时间设置失败: {ex.Message}");
                    return SetAndroidTimeViaAlarmManager(currentActivity, dateTime);
                }
            }
        }
        catch (Exception ex)
        {
            Debug.LogError($"Android系统时间设置失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 通过AlarmManager尝试时间设置（限制较多）
    /// </summary>
    private static bool SetAndroidTimeViaAlarmManager(AndroidJavaObject activity, DateTime dateTime)
    {
        try
        {
            // 注意：从Android 4.2开始，普通应用无法直接修改系统时间
            // 这里只能提供用户引导到系统设置页面
            
            Debug.LogWarning("Android: 普通应用无法直接修改系统时间，将引导用户到系统设置");
            
            // 打开系统日期时间设置页面
            var intent = new AndroidJavaObject("android.content.Intent");
            intent.Call<AndroidJavaObject>("setAction", "android.settings.DATE_SETTINGS");
            
            activity.Call("startActivity", intent);
            
            Debug.Log("Android: 已打开系统日期时间设置页面");
            return false; // 返回false表示需要用户手动设置
        }
        catch (Exception ex)
        {
            Debug.LogError($"Android时间设置引导失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 获取Android系统时间
    /// </summary>
    private static DateTime GetAndroidSystemTime()
    {
        try
        {
            var systemClass = new AndroidJavaClass("java.lang.System");
            long timeMillis = systemClass.CallStatic<long>("currentTimeMillis");
            
            DateTime dateTime = DateTimeOffset.FromUnixTimeMilliseconds(timeMillis).DateTime;
            return dateTime;
        }
        catch (Exception ex)
        {
            Debug.LogError($"获取Android系统时间失败: {ex.Message}");
            return DateTime.Now;
        }
    }
    
    #endif
    
    #endregion

#else
    
    // 其他平台或编辑器模式的模拟实现
    public static bool SetSystemVolume(int volumePercent)
    {
        Debug.Log($"[模拟] 音量设置为: {volumePercent}%");
        return true;
    }
    
    public static void SystemVolumeUp()
    {
        Debug.Log("[模拟] 音量增加");
    }
    
    public static void SystemVolumeDown()
    {
        Debug.Log("[模拟] 音量减少");
    }
    
    public static void SystemMute()
    {
        Debug.Log("[模拟] 静音切换");
    }
    
    public static bool SetMonitorBrightness(int brightnessPercent)
    {
        Debug.Log($"[模拟] 亮度设置为: {brightnessPercent}%");
        return true;
    }
    
    public static int GetCurrentVolume()
    {
        Debug.Log("[模拟] 获取当前音量");
        return 50; // 模拟返回50%
    }
    
    public static int GetCurrentBrightness()
    {
        Debug.Log("[模拟] 获取当前亮度");
        return 70; // 模拟返回70%
    }
    
    public static bool SetSystemTime(DateTime dateTime)
    {
        Debug.Log($"[模拟] 系统时间设置为: {dateTime:yyyy-MM-dd HH:mm:ss}");
        return true;
    }
    
    public static DateTime GetSystemTime()
    {
        Debug.Log("[模拟] 获取系统时间");
        return DateTime.Now;
    }
    
#endif
}