// Copyright 2005-2015 Giacomo Stelluti Scala & Contributors. All rights reserved. See License.md in the project root for license information.

using System;

using System.Collections.Generic;

using System.Linq;

using CSharpx;

namespace CommandLine.Core

{

static class TypeLookup

{

public static Maybe<TypeDescriptor> FindTypeDescriptorAndSibling(

string name,

IEnumerable<OptionSpecification> specifications,

StringComparer comparer)

{

var info =

specifications.SingleOrDefault(a => name.MatchName(a.ShortName, a.LongName, comparer))

.ToMaybe()

.Map(

first =>

{

var descr = TypeDescriptor.Create(first.TargetType, first.Max);

var next = specifications

.SkipWhile(s => s.Equals(first)).Take(1)

.SingleOrDefault(x => x.IsValue()).ToMaybe()

.Map(second => TypeDescriptor.Create(second.TargetType, second.Max));

return descr.WithNextValue(next);

});

return info;

}

}

}