using System.Application.Services;

using System.Security.Cryptography;

using System.Linq;

using System.Application.Models;

using _Constants = System.Common.Constants;

namespace System.Application

{

public static partial class DeviceIdHelper

{

static Guid GetGuid(string key)

{

var value = Preferences2.Get(key, null);

if (!(!string.IsNullOrWhiteSpace(value) && ShortGuid.TryParse(value, out Guid guid)))

{

guid = Guid.NewGuid();

Preferences2.Set(key, guid.ToStringS());

}

return guid;

}

static string Get(string key)

{

var value = Preferences2.Get(key, null);

if (string.IsNullOrWhiteSpace(value))

{

value = Random2.GenerateRandomString(DeviceIdRLength, _Constants.DigitsLetters);

Preferences2.Set(key, value);

}

return value;

}

static Guid DeviceIdG => GetGuid("KEY_DEVICE_ID_G");

static string DeviceIdR => Get("KEY_DEVICE_ID_R");

static string DeviceIdN

{

get

{

var s = IPlatformService.Instance;

(var key, var iv) = s.MachineSecretKey;

var data = key.FirstOrDefault() % 2 == 0 ? key.Concat(iv) : iv.Concat(key);

return Hashs.String.SHA256(data.ToArray(), isLower: false);

}

}

public static void SetDeviceId(this ActiveUserRecordDTO value)

{

var deviceIdG = DeviceIdG;

var deviceIdR = DeviceIdR;

var deviceIdN = DeviceIdN;

value.DeviceIdG = deviceIdG;

value.DeviceIdR = deviceIdR;

value.DeviceIdN = deviceIdN;

}

}

}