// 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.Threading;
using Microsoft.CodeAnalysis.Text;

namespace Microsoft.CodeAnalysis.Diagnostics;

/// <summary>
/// An implementation of <see cref="AdditionalText"/> for the compiler that wraps a <see cref="AdditionalDocumentState"/>.
/// </summary>
/// <remarks>
/// Create a <see cref="SourceText"/> from a <see cref="AdditionalDocumentState"/>.
/// </remarks>
internal sealed class AdditionalTextWithState(AdditionalDocumentState documentState) : AdditionalText
{
    private readonly AdditionalDocumentState _documentState = documentState ?? throw new ArgumentNullException(nameof(documentState));

    /// <summary>
    /// Resolved path of the document.
    /// </summary>
    public override string Path => _documentState.FilePath ?? _documentState.Name;

    /// <summary>
    /// Retrieves a <see cref="SourceText"/> with the contents of this file.
    /// </summary>
    public override SourceText GetText(CancellationToken cancellationToken = default)
    {
        var text = _documentState.GetTextSynchronously(cancellationToken);
        return text;
    }
}