Aragas/Bannerlord.MBOptionScreen

using System;
using System.Collections.Concurrent;

namespace MCM.Abstractions.Base.Global
{
#if !BANNERLORDMCM_INCLUDE_IN_CODE_COVERAGE
    [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage, global::System.Diagnostics.DebuggerNonUserCode]
#endif
#if !BANNERLORDMCM_PUBLIC
    internal
#else
    public
# endif
    abstract class GlobalSettings<T> : GlobalSettings where T : GlobalSettings, new()
    {
        /// <summary>
        /// A modder flriendly way to get settings from any place
        /// We now cache it. Cache is invalidated on game start/end.
        /// </summary>
        public static T? Instance => (T?) CacheInstance.GetOrAdd(Cache.GetOrAdd(typeof(T), static _ => new T().Id), static id =>
        {
            return BaseSettingsProvider.Instance?.GetSettings(id!);
        });

        /// <summary>
        /// A slower way to get settings from any place.
        /// </summary>
        public static T? InstanceNotCached => (T?) BaseSettingsProvider.Instance?.GetSettings(Cache.GetOrAdd(typeof(T), static _ =>
        {
            return new T().Id;
        })!);
    }

#if !BANNERLORDMCM_INCLUDE_IN_CODE_COVERAGE
    [global::System.Diagnostics.CodeAnalysis.ExcludeFromCodeCoverage, global::System.Diagnostics.DebuggerNonUserCode]
#endif
#if !BANNERLORDMCM_PUBLIC
    internal
#else
    public
# endif
    abstract class GlobalSettings : BaseSettings
    {
        protected static readonly ConcurrentDictionary<Type, string> Cache = new();
        // We don't need to clear it since the only case when the settings instance can change is when
        // we add a new settings cotainer, which is not possible at runtime
        protected static readonly ConcurrentDictionary<string, BaseSettings?> CacheInstance = new();

        internal static void InvalidateCache()
        {
            Cache.Clear();
            CacheInstance.Clear();
        }
    }
}