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

namespace SafeBagDE70.Services
{
    public static class HardwareInforManager
    {
        public static string GetHardwareId()
        {
            string cpuId = GetCpuId();
            string biosId = GetBiosId();
            string motherboardId = GetMotherboardId();

            // Combine the strings and create a hash
            string combined = cpuId + biosId + motherboardId;
            string hardwareId = CreateMD5Hash(combined);

            return hardwareId;
        }

        public static string GetCpuId()
        {
            return GetHardwareInfo("Win32_Processor", "ProcessorId");
        }

        public static string GetBiosId()
        {
            return GetHardwareInfo("Win32_BIOS", "SerialNumber");
        }

        public static string GetMotherboardId()
        {
            return GetHardwareInfo("Win32_BaseBoard", "SerialNumber");
        }

        private static string GetHardwareInfo(string wmiClass, string wmiProperty)
        {
            try
            {
                ManagementObjectSearcher searcher = new ManagementObjectSearcher($"select {wmiProperty} from {wmiClass}");
                foreach (ManagementObject obj in searcher.Get())
                {
                    return obj[wmiProperty]?.ToString() ?? string.Empty;
                }
            }
            catch (Exception ex)
            {
                throw new Exception($"Failed to retrieve {wmiClass} {wmiProperty}: " + ex.Message);
            }
            return string.Empty;
        }

        private static string CreateMD5Hash(string input)
        {
            using (MD5 md5 = MD5.Create())
            {
                byte[] inputBytes = Encoding.ASCII.GetBytes(input);
                byte[] hashBytes = md5.ComputeHash(inputBytes);
                return string.Join("", hashBytes.Select(b => b.ToString("X2")));
            }
        }
    }
}