Aragas/Bannerlord.MBOptionScreen

using HarmonyLib.BUTR.Extensions;

using MCM.Abstractions;
using MCM.Abstractions.Base;
using MCM.Abstractions.Properties;
using MCM.Abstractions.Wrapper;
using MCM.Common;

using System;
using System.Collections;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Linq;

namespace MCM.UI.Adapter.MCMv5.Properties
{
    internal sealed class MCMv5FluentSettingsPropertyDiscoverer : IAttributeSettingsPropertyDiscoverer
    {
        private delegate IEnumerable? GetSettingPropertyGroupsDelegate(object instance);

        private static readonly ConcurrentDictionary<Type, GetSettingPropertyGroupsDelegate?> _cache = new();

        public IEnumerable<string> DiscoveryTypes { get; } = new[] { "mcm_v5_fluent" };

        public IEnumerable<ISettingsPropertyDefinition> GetProperties(BaseSettings settings)
        {
            var obj = settings switch
            {
                IWrapper { Object: { } obj2 } => obj2,
                _ => settings
            };

            var del = _cache.GetOrAdd(obj.GetType(), static x => AccessTools2.GetPropertyGetterDelegate<GetSettingPropertyGroupsDelegate>(x, "SettingPropertyGroups"));
            var settingPropertyGroups = del?.Invoke(obj)?.Cast<object>()
                .Select(x => new SettingsPropertyGroupDefinitionWrapper(x)).Cast<SettingsPropertyGroupDefinition>().ToList() ?? new List<SettingsPropertyGroupDefinition>();

            return settingPropertyGroups.SelectMany(SettingsUtils.GetAllSettingPropertyDefinitions);
        }
    }
}