// 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.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Options;
using Microsoft.CodeAnalysis.SignatureHelp;
 
namespace Microsoft.CodeAnalysis.ExternalAccess.VSTypeScript.Api;
 
/// <summary>
/// TODO: Ideally, we would export TypeScript service and delegate to an imported TypeScript service implementation.
/// However, TypeScript already exports the service so we would need to coordinate the change.
/// </summary>
internal abstract class VSTypeScriptSignatureHelpProviderBase : ISignatureHelpProvider
{
    Task<SignatureHelpItems?> ISignatureHelpProvider.GetItemsAsync(Document document, int position, SignatureHelpTriggerInfo triggerInfo, MemberDisplayOptions options, CancellationToken cancellationToken)
        => GetItemsAsync(document, position, triggerInfo, cancellationToken);
 
    public abstract bool IsTriggerCharacter(char ch);
    public abstract bool IsRetriggerCharacter(char ch);
 
    protected abstract Task<SignatureHelpItems?> GetItemsAsync(Document document, int position, SignatureHelpTriggerInfo triggerInfo, CancellationToken cancellationToken);
}