// 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.Linq;
using Microsoft.VisualStudio.OLE.Interop;
 
namespace Microsoft.VisualStudio.LanguageServices.Implementation.ProjectSystem;
 
internal partial class VisualStudioWorkspaceImpl
{
    private class RenameDocumentUndoUnit : IOleUndoUnit
    {
        private readonly VisualStudioWorkspaceImpl _workspace;
        private readonly string _fromName;
        private readonly string _toName;
        private readonly string _filePath;
 
        public RenameDocumentUndoUnit(VisualStudioWorkspaceImpl workspace, string fromName, string toName, string filePath)
        {
            _workspace = workspace;
            _fromName = fromName;
            _toName = toName;
            _filePath = filePath;
        }
 
        public void Do(IOleUndoManager pUndoManager)
        {
            // Using FirstOrDefault because we only need to rename one document, as that will get
            // applied to linked files.
            var documentId = _workspace.CurrentSolution.GetDocumentIdsWithFilePath(_filePath).FirstOrDefault();
            if (documentId != null)
            {
                var updatedSolution = _workspace.CurrentSolution.WithDocumentName(documentId, _toName);
                _workspace.TryApplyChanges(updatedSolution);
            }
        }
 
        public void GetDescription(out string pBstr)
            => pBstr = string.Format(ServicesVSResources.Rename_0_to_1, _fromName, _toName);
 
        public void GetUnitType(out Guid pClsid, out int plID)
            => throw new NotImplementedException();
 
        public void OnNextAdd()
        {
        }
    }
}