using System.Runtime.InteropServices;
using Avalonia;
using Avalonia.Platform;
using MiniMvvm;

namespace ControlCatalog.ViewModels;

public class PlatformInformationViewModel : ViewModelBase
{
    public PlatformInformationViewModel()
    {
        /*  NOTE:
        *   ------------
        *   The below API is not meant to be used in production Apps. 
        *   If you need to consume this info, please use:
        *      - OperatingSystem ( https://learn.microsoft.com/en-us/dotnet/api/system.operatingsystem | if .NET 5 or greater)
        *      - or RuntimeInformation ( https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices.runtimeinformation )
        */
        
        var runtimeInfo = AvaloniaLocator.Current.GetService<IRuntimePlatform>()?.GetRuntimeInfo();

        if (runtimeInfo is { } info)
        {
            if (RuntimeInformation.IsOSPlatform(OSPlatform.Create("BROWSER")))
            {
                if (info.IsDesktop)
                {
                    PlatformInfo = "Platform: Desktop (browser)";
                }
                else if (info.IsMobile)
                {
                    PlatformInfo = "Platform: Mobile (browser)";
                }
                else
                {
                    PlatformInfo = "Platform: Unknown (browser) - please report";
                }
            }
            else
            {
                if (info.IsDesktop)
                {
                    PlatformInfo = "Platform: Desktop (native)";
                }
                else if (info.IsMobile)
                {
                    PlatformInfo = "Platform: Mobile (native)";
                }
                else
                {
                    PlatformInfo = "Platform: Unknown (native) - please report";
                }
            }
        }
    }
    
    public string? PlatformInfo { get; }
}