// 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.

#nullable disable

using System.Diagnostics;

namespace Microsoft.CodeAnalysis.Scripting.Hosting
{
    /// <summary>
    /// Represents a shadow copy of an assembly or a standalone module.
    /// </summary>
    public sealed class MetadataShadowCopy
    {
        /// <summary>
        /// Assembly manifest module copy or a standalone module copy.
        /// </summary>
        public FileShadowCopy PrimaryModule { get; }

        /// <summary>
        /// Documentation file copy or null if there is none.
        /// </summary>
        /// <remarks>
        /// Documentation files are currently only supported for manifest modules, not modules included in an assembly.
        /// </remarks>
        public FileShadowCopy DocumentationFile { get; }

        // this instance doesn't own the image
        public Metadata Metadata { get; }

        internal MetadataShadowCopy(FileShadowCopy primaryModule, FileShadowCopy documentationFileOpt, Metadata metadataCopy)
        {
            Debug.Assert(primaryModule != null);
            Debug.Assert(metadataCopy != null);
            ////Debug.Assert(!metadataCopy.IsImageOwner); property is now internal

            PrimaryModule = primaryModule;
            DocumentationFile = documentationFileOpt;
            Metadata = metadataCopy;
        }

        // keep this internal so that users can't delete files that the provider manages
        internal void DisposeFileHandles()
        {
            PrimaryModule.DisposeFileStream();
            DocumentationFile?.DisposeFileStream();
        }
    }
}