// 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 Microsoft.CodeAnalysis.Options;
 
namespace Microsoft.CodeAnalysis.Diagnostics
{
    internal static class DiagnosticModeExtensions
    {
        public static DiagnosticMode GetDiagnosticMode(this IGlobalOptionService globalOptions, Option2<DiagnosticMode>? option = null)
        {
            option ??= InternalDiagnosticsOptionsStorage.NormalDiagnosticMode;
            var diagnosticModeOption = globalOptions.GetOption(option);
 
            // If the workspace diagnostic mode is set to Default, defer to the feature flag service.
            return diagnosticModeOption == DiagnosticMode.Default
                ? globalOptions.GetOption(DiagnosticOptionsStorage.LspPullDiagnosticsFeatureFlag) ? DiagnosticMode.LspPull : DiagnosticMode.SolutionCrawlerPush
                : diagnosticModeOption;
        }
 
        public static bool IsLspPullDiagnostics(this IGlobalOptionService globalOptions, Option2<DiagnosticMode>? option = null)
            => GetDiagnosticMode(globalOptions, option) == DiagnosticMode.LspPull;
 
        public static bool IsSolutionCrawlerPushDiagnostics(this IGlobalOptionService globalOptions, Option2<DiagnosticMode>? option = null)
            => GetDiagnosticMode(globalOptions, option) == DiagnosticMode.SolutionCrawlerPush;
    }
}