using System;
using System.ComponentModel;
using System.Management;
using System.Runtime.InteropServices;
using System.Security.Cryptography;
using System.Text;

namespace Pilz.Cryptography;

[EditorBrowsable(EditorBrowsableState.Never)]
public static class Helpers
{
    private static string clientSecret = null;

    public static string CalculateClientSecret()
    {
        // Try getting serial number of C drive
        if (clientSecret == null && RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
        {
            ManagementObjectSearcher searcher = new("SELECT * FROM Win32_PhysicalMedia");
            string sn = null;

            foreach (var entry in searcher.Get())
            {
                if (entry is ManagementObject wmi_HD && string.IsNullOrEmpty(sn) && wmi_HD["SerialNumber"] != null)
                    sn = wmi_HD["SerialNumber"].ToString()?.Trim();
            }

            clientSecret = sn;
        }

        // Fallback to Mashine name
        clientSecret ??= Environment.MachineName;

        return clientSecret;
    }

    public static string GenerateUniquieID<T>(string var)
    {
        var sn = CalculateClientSecret();
        var dateTime = DateTime.UtcNow.ToString("yyyyMMddHHmmssfffffff");
        var type = typeof(T).ToString();
        var together = sn + dateTime + type + var;
        var hash = BitConverter.ToString(MD5.HashData(Encoding.Default.GetBytes(together))).Replace("-", string.Empty);
        return hash;
    }
}