// 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.Runtime.Serialization;
using System.Threading;
using Microsoft.CodeAnalysis.DocumentHighlighting;
using Microsoft.CodeAnalysis.Text;
 
namespace Microsoft.CodeAnalysis.ExternalAccess.AspNetCore.EmbeddedLanguages
{
    /// <inheritdoc cref="IEmbeddedLanguageDocumentHighlighter"/>
    internal interface IAspNetCoreEmbeddedLanguageDocumentHighlighter
    {
        /// <inheritdoc cref="IEmbeddedLanguageDocumentHighlighter.GetDocumentHighlights"/>
        ImmutableArray<AspNetCoreDocumentHighlights> GetDocumentHighlights(
            SemanticModel semanticModel,
            SyntaxToken token,
            int position,
            CancellationToken cancellationToken);
    }
 
    internal enum AspNetCoreHighlightSpanKind
    {
        None,
        Definition,
        Reference,
        WrittenReference,
    }
 
    [DataContract]
    internal readonly struct AspNetCoreHighlightSpan
    {
        [DataMember(Order = 0)]
        public TextSpan TextSpan { get; }
 
        [DataMember(Order = 1)]
        public AspNetCoreHighlightSpanKind Kind { get; }
 
        public AspNetCoreHighlightSpan(TextSpan textSpan, AspNetCoreHighlightSpanKind kind) : this()
        {
            TextSpan = textSpan;
            Kind = kind;
        }
    }
 
    internal readonly struct AspNetCoreDocumentHighlights
    {
        public ImmutableArray<AspNetCoreHighlightSpan> HighlightSpans { get; }
 
        public AspNetCoreDocumentHighlights(ImmutableArray<AspNetCoreHighlightSpan> highlightSpans)
        {
            HighlightSpans = highlightSpans;
        }
    }
}