Aragas/Bannerlord.MBOptionScreen

using HarmonyLib.BUTR.Extensions;

using MCM.Common;

using System;
using System.ComponentModel;
using System.Runtime.CompilerServices;

namespace MCM.Abstractions.Base.PerCampaign
{
    [Obsolete("Will be removed from future API", true)]
#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 BasePerCampaignSettingsWrapper : PerCampaignSettings, IWrapper
    {
        private delegate string GetIdDelegate();
        private delegate string GetFolderNameDelegate();
        private delegate string GetDisplayNameDelegate();
        private delegate int GetUIVersionDelegate();
        private delegate string GetSubFolderDelegate();
        private delegate char GetSubGroupDelimiterDelegate();
        private delegate void OnPropertyChangedDelegate(string? propertyName);

        private readonly GetIdDelegate? _getIdDelegate;
        private readonly GetFolderNameDelegate? _getFolderNameDelegate;
        private readonly GetDisplayNameDelegate? _getDisplayNameDelegate;
        private readonly GetUIVersionDelegate? _getUIVersionDelegate;
        private readonly GetSubFolderDelegate? _getSubFolderDelegate;
        private readonly GetSubGroupDelimiterDelegate? _getSubGroupDelimiterDelegate;
        private readonly OnPropertyChangedDelegate? _methodOnPropertyChangedDelegate;

        /// <inheritdoc/>
        public object Object { get; protected set; }

        /// <inheritdoc/>
        public override string Id => _getIdDelegate?.Invoke() ?? "ERROR";
        /// <inheritdoc/>
        public override string FolderName => _getFolderNameDelegate?.Invoke() ?? string.Empty;
        /// <inheritdoc/>
        public override string DisplayName => _getDisplayNameDelegate?.Invoke() ?? "ERROR";
        /// <inheritdoc/>
        public override int UIVersion => _getUIVersionDelegate?.Invoke() ?? 1;
        /// <inheritdoc/>
        public override string SubFolder => _getSubFolderDelegate?.Invoke() ?? string.Empty;
        /// <inheritdoc/>
        public override char SubGroupDelimiter => _getSubGroupDelimiterDelegate?.Invoke() ?? '/';
        /// <inheritdoc/>
        public override event PropertyChangedEventHandler? PropertyChanged
        {
            add { if (Object is INotifyPropertyChanged notifyPropertyChanged) notifyPropertyChanged.PropertyChanged += value; }
            remove { if (Object is INotifyPropertyChanged notifyPropertyChanged) notifyPropertyChanged.PropertyChanged -= value; }
        }

        protected BasePerCampaignSettingsWrapper(object @object)
        {
            Object = @object;
            var type = @object.GetType();

            _getIdDelegate = AccessTools2.GetPropertyGetterDelegate<GetIdDelegate>(@object, type, nameof(Id));
            _getFolderNameDelegate = AccessTools2.GetPropertyGetterDelegate<GetFolderNameDelegate>(@object, type, nameof(FolderName));
            _getDisplayNameDelegate = AccessTools2.GetPropertyGetterDelegate<GetDisplayNameDelegate>(@object, type, nameof(DisplayName));
            _getUIVersionDelegate = AccessTools2.GetPropertyGetterDelegate<GetUIVersionDelegate>(@object, type, nameof(UIVersion));
            _getSubFolderDelegate = AccessTools2.GetPropertyGetterDelegate<GetSubFolderDelegate>(@object, type, nameof(SubFolder));
            _getSubGroupDelimiterDelegate = AccessTools2.GetPropertyGetterDelegate<GetSubGroupDelimiterDelegate>(@object, type, nameof(SubGroupDelimiter));
            _methodOnPropertyChangedDelegate = AccessTools2.GetDelegate<OnPropertyChangedDelegate>(@object, type, nameof(OnPropertyChanged));
        }

        /// <inheritdoc/>
        public override void OnPropertyChanged([CallerMemberName] string? propertyName = null) =>
            _methodOnPropertyChangedDelegate?.Invoke(propertyName);
    }
}