using System;
using System.Management;

namespace RGB.NET.Devices.Asus
{
    // ReSharper disable once InconsistentNaming
    internal static class WMIHelper
    {
        #region Properties & Fields

        // ReSharper disable InconsistentNaming
        private static readonly ManagementObjectSearcher? _systemModelSearcher;
        private static readonly ManagementObjectSearcher? _mainboardSearcher;
        private static readonly ManagementObjectSearcher? _graphicsCardSearcher;
        // ReSharper restore InconsistentNaming

        private static string? _systemModelInfo;
        private static (string manufacturer, string model)? _mainboardInfo;
        private static string? _graphicsCardInfo;
        
        #endregion

        #region Constructors

        static WMIHelper()
        {
            if (OperatingSystem.IsWindows())
            {
                _systemModelSearcher = new ManagementObjectSearcher(@"root\CIMV2", "SELECT Model FROM Win32_ComputerSystem");
                _mainboardSearcher = new ManagementObjectSearcher(@"root\CIMV2", "SELECT Manufacturer,Product FROM Win32_BaseBoard");
                _graphicsCardSearcher = new ManagementObjectSearcher(@"root\CIMV2", "SELECT Name FROM Win32_VideoController");
            }
        }

        #endregion

        #region Methods

        internal static string? GetSystemModelInfo()
        {
            if (!OperatingSystem.IsWindows()) return null;

            if ((_systemModelInfo == null) && (_systemModelSearcher != null))
                foreach (ManagementBaseObject managementBaseObject in _systemModelSearcher.Get())
                {
                    _systemModelInfo = managementBaseObject["Model"]?.ToString();
                    break;
                }

            return _systemModelInfo;
        }

        internal static (string manufacturer, string model)? GetMainboardInfo()
        {
            if (!OperatingSystem.IsWindows()) return null;

            if (!_mainboardInfo.HasValue && (_mainboardSearcher != null))
                foreach (ManagementBaseObject managementBaseObject in _mainboardSearcher.Get())
                {
                    _mainboardInfo = (managementBaseObject["Manufacturer"]?.ToString() ?? string.Empty, managementBaseObject["Product"]?.ToString() ?? string.Empty);
                    break;
                }

            return _mainboardInfo;
        }

        internal static string? GetGraphicsCardsInfo()
        {
            if (!OperatingSystem.IsWindows()) return null;

            if ((_graphicsCardInfo == null) && (_graphicsCardSearcher != null))
                foreach (ManagementBaseObject managementBaseObject in _graphicsCardSearcher.Get())
                {
                    _graphicsCardInfo = managementBaseObject["Name"]?.ToString();
                    break;
                }

            return _graphicsCardInfo;
        }

        #endregion
    }
}