// 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.
 
#nullable disable
 
using Microsoft.CodeAnalysis;
using Microsoft.VisualStudio.LanguageServices.Implementation.CodeModel.Collections;
using Microsoft.VisualStudio.LanguageServices.Implementation.Utilities;
 
namespace Microsoft.VisualStudio.LanguageServices.Implementation.CodeModel.ExternalElements;
 
public abstract class AbstractExternalCodeMember : AbstractExternalCodeElement
{
    internal AbstractExternalCodeMember(CodeModelState state, ProjectId projectId, ISymbol symbol)
        : base(state, projectId, symbol)
    {
    }
 
    protected virtual bool GetCanOverride()
    {
        var symbol = LookupSymbol();
        return symbol.IsVirtual;
    }
 
    protected virtual bool GetMustImplement()
    {
        var symbol = LookupSymbol();
        return symbol.IsAbstract;
    }
 
    protected virtual EnvDTE.CodeElements GetParameters()
        => ExternalParameterCollection.Create(this.State, this, this.ProjectId);
 
    public bool CanOverride
    {
        get
        {
            return GetCanOverride();
        }
 
        set
        {
            throw Exceptions.ThrowEFail();
        }
    }
 
    public bool MustImplement
    {
        get
        {
            return GetMustImplement();
        }
 
        set
        {
            throw Exceptions.ThrowEFail();
        }
    }
 
    public EnvDTE.CodeElements Parameters
    {
        get { return GetParameters(); }
    }
}