using System.Management;
using System.Security.Cryptography;
using System.Text;
using MasstransferCommon.Utils;

namespace MasstransferSecurity.Utils;

/// <summary>
/// 设备信息工具类方法
/// </summary>
public sealed class DeviceInfoUtil
{
    private const string KeyPath = @"Software\Masstransfer\Device";

    public static string GenerateUniqueID()
    {
        var cpuId = GetCpuId();
        var motherboardId = GetMotherboardId();
        var diskDriveId = GetDiskDriveId();
        var macAddress = GetMacAddress();

        var deviceId = $"{cpuId}-{motherboardId}-{diskDriveId}-{macAddress}";
        return ComputeSha256Hash(deviceId);
    }

    private static string GetCpuId()
    {
        var cpuId = string.Empty;
        var searcher = new ManagementObjectSearcher("SELECT ProcessorId FROM Win32_Processor");
        foreach (var item in searcher.Get())
        {
            cpuId = item["ProcessorId"].ToString();
            break;
        }

        return cpuId;
    }

    private static string GetMotherboardId()
    {
        var motherboardId = string.Empty;
        var searcher = new ManagementObjectSearcher("SELECT SerialNumber FROM Win32_BaseBoard");
        foreach (var item in searcher.Get())
        {
            motherboardId = item["SerialNumber"].ToString();
            break;
        }

        return motherboardId;
    }

    private static string GetDiskDriveId()
    {
        string diskDriveId = string.Empty;
        var searcher = new ManagementObjectSearcher("SELECT SerialNumber FROM Win32_DiskDrive");
        foreach (var item in searcher.Get())
        {
            diskDriveId = item["SerialNumber"].ToString();
            break;
        }

        return diskDriveId;
    }

    private static string GetMacAddress()
    {
        string macAddress = string.Empty;
        var searcher = new ManagementObjectSearcher(
            "SELECT MACAddress FROM Win32_NetworkAdapter WHERE MACAddress IS NOT NULL AND NOT (MACAddress LIKE '')");
        foreach (var item in searcher.Get())
        {
            macAddress = item["MACAddress"].ToString();
            break;
        }

        return macAddress.Replace(":", string.Empty);
    }

    private static string ComputeSha256Hash(string rawData)
    {
        using SHA256 sha256Hash = SHA256.Create();

        var bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(rawData));

        var builder = new StringBuilder();
        foreach (var t in bytes)
        {
            builder.Append(t.ToString("x2"));
        }

        return builder.ToString();
    }

    /// <summary>
    /// 获取设备的序列号
    /// </summary>
    /// <returns></returns>
    public static string GetDeviceSN()
    {
        return (string)RegistryHelper.ReadValue(KeyPath, "SerialNumber");
    }
}