// 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.Collections.Immutable;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.Diagnostics;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.ExternalAccess.VSTypeScript;
 
[DiagnosticAnalyzer(InternalLanguageNames.TypeScript)]
internal sealed class VSTypeScriptDocumentDiagnosticAnalyzer : DocumentDiagnosticAnalyzer
{
    public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [];
 
    public override Task<ImmutableArray<Diagnostic>> AnalyzeSyntaxAsync(Document document, CancellationToken cancellationToken)
    {
        var analyzer = document.Project.Services.GetRequiredService<VSTypeScriptDiagnosticAnalyzerLanguageService>().Implementation;
        if (analyzer == null)
        {
            return SpecializedTasks.EmptyImmutableArray<Diagnostic>();
        }
 
        return analyzer.AnalyzeDocumentSyntaxAsync(document, cancellationToken);
    }
 
    public override Task<ImmutableArray<Diagnostic>> AnalyzeSemanticsAsync(Document document, CancellationToken cancellationToken)
    {
        var analyzer = document.Project.Services.GetRequiredService<VSTypeScriptDiagnosticAnalyzerLanguageService>().Implementation;
        if (analyzer == null)
        {
            return SpecializedTasks.EmptyImmutableArray<Diagnostic>();
        }
 
        return analyzer.AnalyzeDocumentSemanticsAsync(document, cancellationToken);
    }
}