// 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.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using Microsoft.CodeAnalysis.Features.RQName.SimpleTree;

namespace Microsoft.CodeAnalysis.Features.RQName.Nodes;

internal sealed class RQUnconstructedType(IList<string> namespaceNames, IList<RQUnconstructedTypeInfo> typeInfos) : RQTypeOrNamespace(namespaceNames)
{
    public readonly ReadOnlyCollection<RQUnconstructedTypeInfo> TypeInfos = new(typeInfos);

    protected override string RQKeyword
    {
        get { return RQNameStrings.Agg; }
    }

    protected override void AppendChildren(List<SimpleTreeNode> childList)
    {
        base.AppendChildren(childList);

        var typeNodes = from typeInfo in TypeInfos
                        let typeParamCountNode = new SimpleGroupNode(RQNameStrings.TypeVarCnt, typeInfo.TypeVariableCount.ToString())
                        let nameLeaf = new SimpleLeafNode(typeInfo.TypeName)
                        select (SimpleTreeNode)new SimpleGroupNode(RQNameStrings.AggName, nameLeaf, typeParamCountNode);
        childList.AddRange(typeNodes);
    }
}

internal readonly struct RQUnconstructedTypeInfo(string typeName, int typeVariableCount)
{
    public readonly string TypeName = typeName;
    public readonly int TypeVariableCount = typeVariableCount;
}