// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System;
using System.Runtime.InteropServices;
using Microsoft.VisualStudio.Shell.Interop;
 
namespace Microsoft.VisualStudio.Razor.ProjectSystem;
 
internal sealed partial class RenameProjectTreeHandler
{
    // Copied, and simplified to our needs, from https://github.com/dotnet/project-system/blob/main/src/Microsoft.VisualStudio.ProjectSystem.Managed.VS/ProjectSystem/VS/Waiting/VisualStudioWaitContext.cs
 
    internal sealed class WaitIndicator : IDisposable
    {
        // Using a slightly shorter delay than you might expect, because this indicator happens _after_ the user
        // has already potentially seen a dialog for the actual file rename.
        private const int DelayToShowDialogSecs = 1;
 
        private readonly string _title;
        private readonly IVsThreadedWaitDialog3 _dialog;
 
        private readonly string _message;
 
        public WaitIndicator(IVsThreadedWaitDialogFactory waitDialogFactory, string title, string message)
        {
            _title = title;
            _message = message;
            _dialog = CreateDialog(waitDialogFactory);
        }
 
        private IVsThreadedWaitDialog3 CreateDialog(IVsThreadedWaitDialogFactory dialogFactory)
        {
            Marshal.ThrowExceptionForHR(dialogFactory.CreateInstance(out var dialog2));
 
            Assumes.NotNull(dialog2);
 
            var dialog3 = (IVsThreadedWaitDialog3)dialog2;
 
            dialog3.StartWaitDialog(
                szWaitCaption: _title,
                szWaitMessage: _message,
                szProgressText: null,
                varStatusBmpAnim: null,
                szStatusBarText: null,
                fIsCancelable: false,
                iDelayToShowDialog: DelayToShowDialogSecs,
                fShowMarqueeProgress: true);
 
            return dialog3;
        }
 
        public void Dispose()
        {
            _dialog.EndWaitDialog(out _);
        }
    }
}