// 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 Microsoft.CodeAnalysis.Editor.Shared.Extensions;
using Microsoft.CodeAnalysis.Text;
using Microsoft.VisualStudio.Commanding;
using Microsoft.VisualStudio.Text.Editor.Commanding;
 
namespace Microsoft.CodeAnalysis.GoOrFind;
 
internal abstract class AbstractGoOrFindCommandHandler<TCommandArgs>(
    IGoOrFindNavigationService navigationService) : ICommandHandler<TCommandArgs>
    where TCommandArgs : EditorCommandArgs
{
    private readonly IGoOrFindNavigationService _navigationService = navigationService;
 
    public string DisplayName => _navigationService.DisplayName;
 
    public CommandState GetCommandState(TCommandArgs args)
    {
        var document = args.SubjectBuffer.CurrentSnapshot.GetOpenDocumentInCurrentContextWithChanges();
        return _navigationService.IsAvailable(document)
            ? CommandState.Available
            : CommandState.Unspecified;
    }
 
    public bool ExecuteCommand(TCommandArgs args, CommandExecutionContext context)
    {
        var subjectBuffer = args.SubjectBuffer;
        var caret = args.TextView.GetCaretPoint(subjectBuffer);
        if (!caret.HasValue)
            return false;
 
        var document = args.SubjectBuffer.CurrentSnapshot.GetOpenDocumentInCurrentContextWithChanges();
        if (!_navigationService.IsAvailable(document))
            return false;
 
        return _navigationService.ExecuteCommand(document, caret.Value.Position);
    }
}