using Serilog;

namespace CommonSocketLibrary.Abstract
{
    public abstract class HandlerTypeManager<Client, Handler>
    {
        private readonly IDictionary<int, Type> _types;
        public IDictionary<int, Type> HandlerTypes { get => _types; }
        protected readonly ILogger _logger;


        public HandlerTypeManager(ILogger logger, HandlerManager<Client, Handler> handlers)
        {
            _types = new Dictionary<int, Type>();
            _logger = logger;

            GenerateHandlerTypes(handlers.Handlers);
        }


        private void GenerateHandlerTypes(IDictionary<int, Handler> handlers)
        {
            foreach (var entry in handlers)
            {
                if (entry.Value == null)
                {
                    _logger.Error($"Failed to link websocket handler #{entry.Key} due to null value.");
                    continue;
                }

                var type = entry.Value.GetType();
                var target = FetchMessageType(type);
                if (target == null)
                {
                    _logger.Error($"Failed to link websocket handler #{entry.Key} due to no match for {target}.");
                    continue;
                }
                _types.Add(entry.Key, target);
                _logger.Debug($"Linked websocket handler #{entry.Key} to type {target.AssemblyQualifiedName}.");
            }
        }

        protected abstract Type? FetchMessageType(Type handlerType);
    }
}