// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
#nullable disable
 
using Microsoft.DotNet.Cli.Utils;
 
namespace Microsoft.DotNet.Cli.CommandFactory.CommandResolution;
 
internal static class MuxerCommandSpecMaker
{
    internal static CommandSpec CreatePackageCommandSpecUsingMuxer(
        string commandPath,
        IEnumerable<string> commandArguments)
    {
        var arguments = new List<string>();
 
        var muxer = new Muxer();
 
        var host = muxer.MuxerPath;
 
        if (host == null)
        {
            throw new Exception(LocalizableStrings.UnableToLocateDotnetMultiplexer);
        }
 
        var rollForwardArgument = (commandArguments ?? []).Where(arg => arg.Equals("--allow-roll-forward", StringComparison.OrdinalIgnoreCase));
 
        if (rollForwardArgument.Any())
        {
            arguments.Add("--roll-forward");
            arguments.Add("Major");
        }
 
        arguments.Add(commandPath);
 
        if (commandArguments != null)
        {
            if (rollForwardArgument.Any())
            {
                arguments.AddRange(commandArguments.Except(rollForwardArgument));
            }
            else
            {
                arguments.AddRange(commandArguments);
            }
        }
        return CreateCommandSpec(host, arguments);
    }
 
    private static CommandSpec CreateCommandSpec(
        string commandPath,
        IEnumerable<string> commandArguments)
    {
        var escapedArgs = ArgumentEscaper.EscapeAndConcatenateArgArrayForProcessStart(commandArguments);
 
        return new CommandSpec(commandPath, escapedArgs);
    }
}