// 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.Threading;
using System.Threading.Tasks;
using Microsoft.CodeAnalysis.CodeActions;
using Microsoft.CodeAnalysis.CodeCleanup;
using Microsoft.CodeAnalysis.ExternalAccess.OmniSharp.Options;
using Microsoft.CodeAnalysis.Formatting;
using Microsoft.CodeAnalysis.Simplification;
 
namespace Microsoft.CodeAnalysis.ExternalAccess.OmniSharp.Formatting
{
    internal readonly record struct OmniSharpSyntaxFormattingOptionsWrapper
    {
        internal readonly CodeCleanupOptions CleanupOptions;
 
        internal OmniSharpSyntaxFormattingOptionsWrapper(CodeCleanupOptions cleanupOptions)
        {
            CleanupOptions = cleanupOptions;
        }
 
        public static async ValueTask<OmniSharpSyntaxFormattingOptionsWrapper> FromDocumentAsync(Document document, OmniSharpLineFormattingOptions fallbackLineFormattingOptions, CancellationToken cancellationToken)
        {
            var defaultOptions = CodeCleanupOptions.GetDefault(document.Project.Services);
            var fallbackOptions = defaultOptions with
            {
                FormattingOptions = defaultOptions.FormattingOptions with
                {
                    LineFormatting = new()
                    {
                        IndentationSize = fallbackLineFormattingOptions.IndentationSize,
                        TabSize = fallbackLineFormattingOptions.TabSize,
                        UseTabs = fallbackLineFormattingOptions.UseTabs,
                        NewLine = fallbackLineFormattingOptions.NewLine,
                    }
                }
            };
 
            var cleanupOptions = await document.GetCodeCleanupOptionsAsync(fallbackOptions, cancellationToken).ConfigureAwait(false);
            return new OmniSharpSyntaxFormattingOptionsWrapper(cleanupOptions);
        }
    }
}