// Licensed to the .NET Foundation under one or more agreements.

// The .NET Foundation licenses this file to you under the MIT license.

// See the LICENSE file in the project root for more information.



using System;

using System.ComponentModel;

using System.Diagnostics;

using System.Linq;



namespace Microsoft.Templates.UI.Services

{

    public class DotNetValidator : IRequirementValidator

    {

        public const string Id = "dotnet";

        public const string DisplayName = "[.NET Core Runtime](https://dotnet.microsoft.com/download/dotnet-core/3.1)";

        private const string WindowsAppRuntimeName = "Microsoft.WindowsDesktop.App 3.1";



        public bool IsVersionInstalled(Version version)

        {

            using (var process = new Process())

            {

                process.StartInfo = new ProcessStartInfo

                {

                    FileName = "dotnet",

                    Arguments = "--list-runtimes",

                    UseShellExecute = false,

                    CreateNoWindow = true,

                    RedirectStandardOutput = true,

                    RedirectStandardError = true,

                };



                try

                {

                    process.Start();



                    var result = process.StandardOutput.ReadToEnd();

                    process.WaitForExit();



                    var runtimeVersions = result.Split(new[] { Environment.NewLine }, StringSplitOptions.None)

                                          .Where(v => v.StartsWith(WindowsAppRuntimeName, StringComparison.OrdinalIgnoreCase))

                                          .Select(r => new Version(r.Split(' ')[1]));



                    if (runtimeVersions.Any(r => r.CompareTo(version) >= 0))

                    {

                        return true;

                    }

                }

                catch (Win32Exception)

                {

                    return false;

                }

            }



            return false;

        }

    }

}