using UnityEngine;

/// <summary>
/// Android权限管理器
/// 处理Android平台所需的各种权限
/// </summary>
public static class AndroidPermissionManager
{
#if UNITY_ANDROID && !UNITY_EDITOR
    
    /// <summary>
    /// 检查是否有写入系统设置的权限
    /// </summary>
    public static bool HasWriteSettingsPermission()
    {
        try
        {
            AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
            AndroidJavaClass settingsClass = new AndroidJavaClass("android.provider.Settings$System");
            
            bool canWrite = settingsClass.CallStatic<bool>("canWrite", currentActivity);
            return canWrite;
        }
        catch (System.Exception ex)
        {
            Debug.LogError($"检查写入设置权限失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 请求写入系统设置权限
    /// </summary>
    public static void RequestWriteSettingsPermission()
    {
        try
        {
            AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
            
            AndroidJavaClass intentClass = new AndroidJavaClass("android.content.Intent");
            AndroidJavaObject intent = new AndroidJavaObject("android.content.Intent");
            
            // 设置Action为管理写入设置
            intent.Call<AndroidJavaObject>("setAction", "android.settings.action.MANAGE_WRITE_SETTINGS");
            
            // 设置数据URI
            AndroidJavaClass uriClass = new AndroidJavaClass("android.net.Uri");
            AndroidJavaObject uri = uriClass.CallStatic<AndroidJavaObject>("parse", "package:" + GetPackageName());
            intent.Call<AndroidJavaObject>("setData", uri);
            
            currentActivity.Call("startActivity", intent);
            
            Debug.Log("已请求写入设置权限，请在系统设置中授权");
        }
        catch (System.Exception ex)
        {
            Debug.LogError($"请求写入设置权限失败: {ex.Message}");
        }
    }
    
    /// <summary>
    /// 检查是否有访问网络状态权限
    /// </summary>
    public static bool HasNetworkStatePermission()
    {
        try
        {
            return HasPermission("android.permission.ACCESS_NETWORK_STATE");
        }
        catch (System.Exception ex)
        {
            Debug.LogError($"检查网络状态权限失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 检查是否有访问WiFi状态权限
    /// </summary>
    public static bool HasWifiStatePermission()
    {
        try
        {
            return HasPermission("android.permission.ACCESS_WIFI_STATE");
        }
        catch (System.Exception ex)
        {
            Debug.LogError($"检查WiFi状态权限失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 检查是否有改变WiFi状态权限
    /// </summary>
    public static bool HasChangeWifiStatePermission()
    {
        try
        {
            return HasPermission("android.permission.CHANGE_WIFI_STATE");
        }
        catch (System.Exception ex)
        {
            Debug.LogError($"检查WiFi控制权限失败: {ex.Message}");
            return false;
        }
    }
    
    /// <summary>
    /// 请求运行时权限
    /// </summary>
    public static void RequestPermissions(string[] permissions)
    {
        try
        {
            AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
            
            currentActivity.Call("requestPermissions", permissions, 1001);
            
            Debug.Log($"已请求权限: {string.Join(", ", permissions)}");
        }
        catch (System.Exception ex)
        {
            Debug.LogError($"请求权限失败: {ex.Message}");
        }
    }
    
    /// <summary>
    /// 检查指定权限
    /// </summary>
    private static bool HasPermission(string permission)
    {
        AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
        
        int result = currentActivity.Call<int>("checkSelfPermission", permission);
        
        // PackageManager.PERMISSION_GRANTED = 0
        return result == 0;
    }
    
    /// <summary>
    /// 获取应用包名
    /// </summary>
    private static string GetPackageName()
    {
        AndroidJavaClass unityPlayer = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
        AndroidJavaObject currentActivity = unityPlayer.GetStatic<AndroidJavaObject>("currentActivity");
        
        return currentActivity.Call<string>("getPackageName");
    }
    
    /// <summary>
    /// 初始化必要权限检查
    /// </summary>
    public static void InitializePermissions()
    {
        Debug.Log("=== Android权限检查 ===");
        
        bool writeSettings = HasWriteSettingsPermission();
        bool networkState = HasNetworkStatePermission();
        bool wifiState = HasWifiStatePermission();
        bool changeWifiState = HasChangeWifiStatePermission();
        
        Debug.Log($"写入设置权限: {writeSettings}");
        Debug.Log($"网络状态权限: {networkState}");
        Debug.Log($"WiFi状态权限: {wifiState}");
        Debug.Log($"WiFi控制权限: {changeWifiState}");
        
        // 如果缺少关键权限，给出提示
        if (!writeSettings)
        {
            Debug.LogWarning("缺少写入设置权限，亮度控制可能无法正常工作");
        }
        
        if (!networkState || !wifiState)
        {
            Debug.LogWarning("缺少网络相关权限，网络功能可能受限");
        }
    }

#else
    
    // 非Android平台的空实现
    public static bool HasWriteSettingsPermission() => true;
    public static void RequestWriteSettingsPermission() => Debug.Log("[非Android] 无需权限");
    public static bool HasNetworkStatePermission() => true;
    public static bool HasWifiStatePermission() => true;
    public static bool HasChangeWifiStatePermission() => true;
    public static void RequestPermissions(string[] permissions) => Debug.Log("[非Android] 无需权限");
    public static void InitializePermissions() => Debug.Log("[非Android] 权限检查跳过");
    
#endif
}