using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Management;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace Pilz.Cryptography
{
    public class UniquieID<TargetType> : UniquieID
    {
        public UniquieID() : base()
        {
        }

        public UniquieID(bool autoGenerate) : base(autoGenerate)
        {
        }

        protected override string GenerateSimple()
        {
            return typeof(TargetType).ToString() + base.GenerateSimple();
        }

        protected override string GenerateDefault()
        {
            return GenerateUniquieID<TargetType>(string.Empty);
        }

        public override int GetHashCode()
        {
            return base.GetHashCode();
        }

        public override bool Equals(object obj)
        {
            return base.Equals(obj);
        }

        #region Statics for Generation

        private static string GenerateUniquieID<T>(string var)
        {
            var sn = TryGetSerialNumberOfFirstHardDrive();
            var dateTime = DateTime.UtcNow.ToString("yyyyMMddHHmmssfffffff");
            var type = typeof(T).ToString();
            var together = sn + dateTime + type + var;

            var md5 = MD5.Create();
            var hash = BitConverter.ToString(md5.ComputeHash(Encoding.Default.GetBytes(together))).Replace("-", string.Empty);
            md5.Dispose();

            return hash;
        }

        private static string Win32_PhysicalMedia_SerialNumber = null;
        private static string TryGetSerialNumberOfFirstHardDrive()
        {
            if (Win32_PhysicalMedia_SerialNumber == null)
            {
                var searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PhysicalMedia");
                var sn = string.Empty;

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

                Win32_PhysicalMedia_SerialNumber = sn;
            }

            return Win32_PhysicalMedia_SerialNumber;
        }

        #endregion

        public static implicit operator string(UniquieID<TargetType> id)    => id.ID;
        public static implicit operator UniquieID<TargetType>(string id)    => new UniquieID<TargetType>() { ID = id };
        public static implicit operator UniquieID<TargetType>(int id)       => new UniquieID<TargetType>() { ID = Convert.ToString(id) };

        public static bool operator ==(UniquieID<TargetType> left, UniquieID<TargetType> right) => left.ID.Equals(right.ID);
        public static bool operator !=(UniquieID<TargetType> left, UniquieID<TargetType> right) => !left.ID.Equals(right.ID);
    }
}