// 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.Collections.Generic;
using System.Composition;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.ExternalAccess.VSTypeScript.Api;
using Microsoft.CodeAnalysis.Formatting;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Text;

namespace Microsoft.CodeAnalysis.ExternalAccess.VSTypeScript;

[ExportLanguageService(typeof(IFormattingService), InternalLanguageNames.TypeScript), Shared]
[method: ImportingConstructor]
[method: Obsolete(MefConstruction.ImportingConstructorMessage, error: true)]
internal sealed class VSTypeScriptFormattingService([Import(AllowDefault = true)] IVSTypeScriptFormattingServiceImplementation impl) : IFormattingService
{
    private readonly IVSTypeScriptFormattingServiceImplementation _impl = impl ?? throw new ArgumentNullException(nameof(impl));

    public Task<Document> FormatAsync(Document document, IEnumerable<TextSpan>? spans, LineFormattingOptions lineFormattingOptions, SyntaxFormattingOptions? syntaxFormattingOptions, CancellationToken cancellationToken)
    {
        var tsOptions = new VSTypeScriptIndentationOptions(
            UseSpaces: !lineFormattingOptions.UseTabs,
            TabSize: lineFormattingOptions.TabSize,
            IndentSize: lineFormattingOptions.IndentationSize);

        return _impl.FormatAsync(document, spans, tsOptions, cancellationToken);
    }
}