// 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.Composition;
using Microsoft.CodeAnalysis.Host.Mef;
using Microsoft.CodeAnalysis.Options;
using Microsoft.CodeAnalysis.Formatting;
using System.Linq;
using System.Collections.Immutable;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.ExternalAccess.Razor
{
    [Export(typeof(RazorGlobalOptions)), Shared]
    internal sealed class RazorGlobalOptions
    {
        private readonly IGlobalOptionService _globalOptions;
 
        [ImportingConstructor]
        [SuppressMessage("RoslynDiagnosticsReliability", "RS0033:Importing constructor should be marked with 'ObsoleteAttribute'", Justification = "Used in test code")]
        public RazorGlobalOptions(IGlobalOptionService globalOptions)
        {
            _globalOptions = globalOptions;
        }
 
        public RazorAutoFormattingOptions GetAutoFormattingOptions()
            => new(_globalOptions.GetAutoFormattingOptions(LanguageNames.CSharp));
 
        public bool UseTabs
        {
            get => _globalOptions.GetOption(RazorLineFormattingOptionsStorage.UseTabs);
            set => _globalOptions.SetGlobalOption(RazorLineFormattingOptionsStorage.UseTabs, value);
        }
 
        public int TabSize
        {
            get => _globalOptions.GetOption(RazorLineFormattingOptionsStorage.TabSize);
            set => _globalOptions.SetGlobalOption(RazorLineFormattingOptionsStorage.TabSize, value);
        }
 
#pragma warning disable IDE0060 // Remove unused parameter
        /// <summary>
        /// For testing purposes only. Razor does not use MEF composition for host services so we need to return a mock.
        /// </summary>
        public static RazorGlobalOptions GetGlobalOptions(Workspace workspace)
            => new(new TestGlobalOptionService());
#pragma warning restore
 
        private sealed class TestGlobalOptionService : IGlobalOptionService
        {
            public T GetOption<T>(PerLanguageOption2<T> option, string languageName)
                => default!;
 
            public T GetOption<T>(Option2<T> option) => throw new NotImplementedException();
            public T GetOption<T>(OptionKey2 optionKey) => throw new NotImplementedException();
            public ImmutableArray<object?> GetOptions(ImmutableArray<OptionKey> optionKeys) => throw new NotImplementedException();
            public bool RefreshOption(OptionKey2 optionKey, object? newValue) => throw new NotImplementedException();
            public ImmutableArray<object?> GetOptions(ImmutableArray<OptionKey2> optionKeys) => throw new NotImplementedException();
            public void SetGlobalOption<T>(Option2<T> option, T value) => throw new NotImplementedException();
            public void SetGlobalOption<T>(PerLanguageOption2<T> option, string language, T value) => throw new NotImplementedException();
            public void SetGlobalOption(OptionKey2 optionKey, object? value) => throw new NotImplementedException();
            public bool SetGlobalOptions(ImmutableArray<KeyValuePair<OptionKey2, object?>> options) => throw new NotImplementedException();
            public void AddOptionChangedHandler(object target, WeakEventHandler<OptionChangedEventArgs> handler) => throw new NotImplementedException();
            public void RemoveOptionChangedHandler(object target, WeakEventHandler<OptionChangedEventArgs> handler) => throw new NotImplementedException();
 
            bool IOptionsReader.TryGetOption<T>(OptionKey2 optionKey, out T value)
            {
                value = GetOption<T>(optionKey);
                return true;
            }
        }
    }
}