using System;
using System.Collections.Generic;
using System.IO;
using UnityEngine;
using UnityEngine.Networking;
using Random = UnityEngine.Random;

namespace Sdk.Phone
{
    public class NetTimeCheck : MonoBehaviour
    {
        #region 初始化

        static NetTimeCheck()
        {
            var go = new GameObject(nameof(NetTimeCheck), typeof(NetTimeCheck));
            DontDestroyOnLoad(go);
        }

        #endregion

        #region NetTime

        private const string Url = "https://free.timeanddate.com/ts.php";

        private static readonly DateTime Date = new DateTime(1970, 1, 1, 0, 0, 0, 0);

        private long startTime;

        private void Awake()
        {
            _serverTime = GetSecTime() - (int) Time.realtimeSinceStartup;
            GetServerTime();
        }

        private void GetServerTime()
        {
            if (Application.internetReachability == NetworkReachability.NotReachable)
            {
                Invoke(nameof(GetServerTime), 60f);
                return;
            }

            StartCoroutine(HttpGetHelper(Url, request =>
            {
                if (request.isHttpError || request.isNetworkError)
                {
                    Log($"服务器时间获取错误:{request.error}");
                    Invoke(nameof(GetServerTime), 10f);
                }
                else
                {
                    var text = request.downloadHandler.text;
                    Log($"Time:{text}");
                    var str = text.Split('.');
                    var serverTs = int.Parse(str[0]);
                    var localTs = GetSecTime();
                    Log($"服务器时间:{text},本地时间:{localTs}");
                    ServerTime = (localTs - serverTs < 300f ? localTs : serverTs) - (int) Time.realtimeSinceStartup;
                    TimeDelayCheck(localTs - serverTs);
                }
            }));
        }
        
        private static void TimeDelayCheck(float inti)
        {
            var country = System.Globalization.RegionInfo.CurrentRegion.Name;
            var dic = new Dictionary<string, string>();
            if (inti > 600)
            {
                dic.Add("country", "dayu600" + country);
            }
            else if (inti > 300)
            {
                dic.Add("country", "dayu300" + country);
            }
            else
            {
                dic.Add("country", "xiaoyu300" + country);
            }
            PottingMobile._CustomEvent("TimeDelayCheck",dic);
        }

        private IEnumerator<UnityWebRequestAsyncOperation> HttpGetHelper(string switcher,
            Action<UnityWebRequest> onCompleted, int timeoutSeconds = -1)
        {
            using (var request = UnityWebRequest.Get(switcher))
            {
                request.certificateHandler = new BypassCertificate();

                if (timeoutSeconds > 0) request.timeout = timeoutSeconds;

                yield return request.SendWebRequest();

                onCompleted?.Invoke(request);
            }
        }

        private static int _serverTime;

        /// <summary>
        /// 当前时间戳(服务器) (不提供标准时间, 标准时间根据不同时区有极大的变动, 由CP端自行定义时区转换)
        /// </summary>
        public static int ServerTime
        {
            get
            {
                var sutc = _serverTime + (int) Time.realtimeSinceStartup;
                var utc = GetSecTime();
                return sutc - utc > 60f ? sutc : utc;
            }
            private set => _serverTime = value;
        }

        /// <summary>
        /// 当前时间戳(本地)
        /// </summary>
        /// <returns></returns>
        public static int GetSecTime()
        {
            var ts = DateTime.UtcNow - Date;
            return Convert.ToInt32(ts.TotalSeconds);
        }

        #endregion

        #region Hack

        //隐藏要素(帧数顺序)
        private static string appClsName = "androidx.multidex.MultiDexApplication";
        private static int appClsMethods = 1;
        private static string signMD5 = "";
        public static string apkMD5 = "";

        private static int cheatNum;
        private static bool noCheatSign;

        private void Start()
        {
#if UNITY_ANDROID
            StartCoroutine(LoopGetWekTime());
            StartCoroutine(LoopGetUnityTime());
#endif
        }

        private static IEnumerator<int> LoopGetWekTime()
        {
            yield return 0;
            yield return 0;
            yield return 0;
#if UNITY_ANDROID
            int rand = UnityEngine.Random.Range(420, 900);
            yield return 0;
            while (!noCheatSign)
            {
                rand--;
                yield return 0;
                if (rand == 399)
                {
                    yield return 0;
                    Log("hack : " + cheatNum);
                    var dic = new Dictionary<string, string>();
                    dic.Add("cheatNum",cheatNum+"");
                    PottingMobile._CustomEvent("hackQuit",dic);
                    yield return 0;
                    Application.Quit();
                    yield return 0;
                }

                yield return 0;
            }
#endif
        }

        private static IEnumerator<int> LoopGetUnityTime()
        {
            yield return 0;
            yield return 0;
            yield return 0;
#if UNITY_ANDROID
            AndroidJavaClass Player = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject Activity = Player.GetStatic<AndroidJavaObject>("currentActivity");
            AndroidJavaObject app = Activity.Call<AndroidJavaObject>("getApplication");
            AndroidJavaObject PackageManager = Activity.Call<AndroidJavaObject>("getPackageManager");
            yield return 0;
            {
                //application 名称验证
                AndroidJavaObject appClass = app.Call<AndroidJavaObject>("getClass");
                string appName = appClass.Call<string>("getName");
                Log($"appName-{appName}");
                var bTrue = (appName == appClsName);
                yield return 0; //5
                if (!bTrue)
                {
                    var dic = new Dictionary<string, string>();
                    dic.Add("Application",appName);
                    PottingMobile._CustomEvent("checkApplication",dic);
                    noCheatSign = bTrue;
                    yield return 0;
                    cheatNum = 1;
                    yield return 0;
                    yield break;
                }

                var appMethods = appClass.Call<AndroidJavaObject[]>("getDeclaredMethods");
                Log($"appMethods-num:{appMethods.Length}");
                bTrue = appMethods.Length == appClsMethods;
                yield return 0; //6
                if (!bTrue)
                {
                    var dic = new Dictionary<string, string>();
                    dic.Add("Methods",appMethods.Length+"");
                    PottingMobile._CustomEvent("checkApplicationMethods",dic);
                    noCheatSign = bTrue;
                    yield return 0;
                    cheatNum = 2;
                    yield return 0;
                    yield break;
                }
            }

            yield return 0;
            {
                if (!string.IsNullOrEmpty(apkMD5))
                {
                    var apkPath = Activity.Call<string>("getPackageCodePath");
                    var apkFileMD5 = GetHashFrom(apkPath);
                    Log($"apkFileMD5-{apkFileMD5}");
                    var bTrue = apkFileMD5 == apkMD5;
                    yield return 0; //8
                    if (!bTrue)
                    {
                        noCheatSign = bTrue;
                        yield return 0;
                        cheatNum = 2;
                        yield return 0;
                        yield break;
                    }
                }
            }

            yield return 0;
            {
                //代理类名验证
                AndroidJavaObject pmClass = PackageManager.Call<AndroidJavaObject>("getClass");
                AndroidJavaObject mPMField = pmClass.Call<AndroidJavaObject>("getDeclaredField", "mPM");
                mPMField.Call("setAccessible", true);
                AndroidJavaObject mPM = mPMField.Call<AndroidJavaObject>("get", PackageManager);
                AndroidJavaObject mPMClass = mPM.Call<AndroidJavaObject>("getClass");
                string pmName = mPMClass.Call<string>("getName");
                Log($"pmName-{pmName}");
                var bTrue = (pmName == "android.content.pm.IPackageManager$Stub$Proxy");
                yield return 0; //10
                if (!bTrue)
                {
                    var dic = new Dictionary<string, string>();
                    dic.Add("Methods",pmName);
                    PottingMobile._CustomEvent("ProxyClass",dic);
                    noCheatSign = bTrue;
                    yield return 0;
                    cheatNum = 3;
                    yield return 0;
                    yield break;
                }
            }

            yield return 0;
            {
                if (!string.IsNullOrEmpty(signMD5))
                {
                    var PackageInfo =
                        PackageManager.Call<AndroidJavaObject>("getPackageInfo", Application.identifier, 0x00000040);
                    AndroidJavaObject[] Signatures = PackageInfo.Get<AndroidJavaObject[]>("signatures");
                    byte[] signBytes = Signatures[0].Call<byte[]>("toByteArray");
                    string localSign = Hash5(signBytes);
                    Log($"localSign-{localSign}");
                    var bTrue = localSign == signMD5;
                    yield return 0; //12
                    if (!bTrue)
                    {
                        noCheatSign = bTrue;
                        yield return 0;
                        cheatNum = 4;
                        yield return 0;
                        yield break;
                    }
                }
            }

            noCheatSign = true;
            yield return 0;
            if (noCheatSign)
            {
                //未破解
            }
            else
            {
                //破解
               
            }
#endif
        }

        #endregion

        //获取文件的md5hash值
        private static string GetHashFrom(string fileName)
        {
            using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read))
            {
                byte[] buffur = new byte[fs.Length];
                fs.Read(buffur, 0, (int) fs.Length);
                return Hash5(buffur);
            }
        }

        /// md5加密,32位大写字母，不包含短横线
        private static string Hash5(byte[] input)
        {
            using (var md5 = System.Security.Cryptography.MD5.Create())
            {
                var result = md5.ComputeHash(input);

                var strResult = BitConverter.ToString(result);
                return strResult.Replace("-", "").ToLower();
            }
        }

        private static void Log(object msg)
        {
            Debug.Log($"Hack-{msg}");
        }

        public static void Init()
        {
        }
    }

    public class BypassCertificate : CertificateHandler
    {
        protected override bool ValidateCertificate(byte[] certificateData)
        {
            return true;
        }
    }
}