// 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.Collections.Generic;
using System.Linq;
using Microsoft.CodeAnalysis.CodeStyle;
using Microsoft.CodeAnalysis.Options;
using Roslyn.Utilities;
 
namespace Microsoft.CodeAnalysis.Editor.UnitTests.CodeActions;
 
public sealed class ParenthesesOptionsProvider
{
    private readonly string _language;
    public ParenthesesOptionsProvider(string language)
    {
        _language = language;
    }
 
    private static readonly CodeStyleOption2<ParenthesesPreference> IgnorePreference =
        new CodeStyleOption2<ParenthesesPreference>(ParenthesesPreference.AlwaysForClarity, NotificationOption2.None);
 
    private static readonly CodeStyleOption2<ParenthesesPreference> RequireForPrecedenceClarityPreference =
        new CodeStyleOption2<ParenthesesPreference>(ParenthesesPreference.AlwaysForClarity, NotificationOption2.Suggestion);
 
    private static readonly CodeStyleOption2<ParenthesesPreference> RemoveIfUnnecessaryPreference =
        new CodeStyleOption2<ParenthesesPreference>(ParenthesesPreference.NeverIfUnnecessary, NotificationOption2.Suggestion);
 
    private static IEnumerable<PerLanguageOption2<CodeStyleOption2<ParenthesesPreference>>> GetAllExceptOtherParenthesesOptions()
    {
        yield return CodeStyleOptions2.ArithmeticBinaryParentheses;
        yield return CodeStyleOptions2.RelationalBinaryParentheses;
        yield return CodeStyleOptions2.OtherBinaryParentheses;
    }
 
    internal OptionsCollection RequireArithmeticBinaryParenthesesForClarity
        => GetSingleRequireOption(CodeStyleOptions2.ArithmeticBinaryParentheses);
 
    internal OptionsCollection RequireRelationalBinaryParenthesesForClarity
        => GetSingleRequireOption(CodeStyleOptions2.RelationalBinaryParentheses);
 
    internal OptionsCollection RequireOtherBinaryParenthesesForClarity
        => GetSingleRequireOption(CodeStyleOptions2.OtherBinaryParentheses);
 
    private static IEnumerable<PerLanguageOption2<CodeStyleOption2<ParenthesesPreference>>> GetAllParenthesesOptions()
        => GetAllExceptOtherParenthesesOptions().Concat(CodeStyleOptions2.OtherParentheses);
 
    internal OptionsCollection IgnoreAllParentheses
    {
        get
        {
            var optionsCollection = new OptionsCollection(_language);
            foreach (var option in GetAllParenthesesOptions())
            {
                optionsCollection.Add(option, IgnorePreference);
            }
 
            return optionsCollection;
        }
    }
 
    internal OptionsCollection RemoveAllUnnecessaryParentheses
    {
        get
        {
            var optionsCollection = new OptionsCollection(_language);
            foreach (var option in GetAllParenthesesOptions())
            {
                optionsCollection.Add(option, RemoveIfUnnecessaryPreference);
            }
 
            return optionsCollection;
        }
    }
 
    internal OptionsCollection RequireAllParenthesesForClarity
    {
        get
        {
            var optionsCollection = new OptionsCollection(_language);
            foreach (var option in GetAllExceptOtherParenthesesOptions())
            {
                optionsCollection.Add(option, RequireForPrecedenceClarityPreference);
            }
 
            optionsCollection.Add(CodeStyleOptions2.OtherParentheses, RemoveIfUnnecessaryPreference);
            return optionsCollection;
        }
    }
 
    private OptionsCollection GetSingleRequireOption(PerLanguageOption2<CodeStyleOption2<ParenthesesPreference>> option)
    {
        var optionsCollection = new OptionsCollection(_language);
        foreach (var o in GetAllParenthesesOptions())
        {
            if (o != option)
            {
                optionsCollection.Add(o, RemoveIfUnnecessaryPreference);
            }
        }
 
        optionsCollection.Add(option, RequireForPrecedenceClarityPreference);
        return optionsCollection;
    }
}