namespace DanieleMarotta.RiversongCodeShowcase
{
    [GameSystemGroup(typeof(DayOnlyAgentSpawnSystemsGroup))]
    public class HouseAgentSystem : GameSystem, IUpdatable
    {
        [InjectService]
        private GameConfig _config;

        [InjectService]
        private IEntityCache _entityCache;

        [InjectService]
        private IProductCatalog _productCatalog;

        [InjectService]
        private IAgentCommonLogic _agentCommonLogic;

        public HouseAgentSystem(IServiceLocator serviceLocator) : base(serviceLocator)
        {
        }

        public void Update()
        {
            var agentDefinition = (AgentDefinition)_config.Agents.GenericAgent.Asset;

            foreach (var house in _entityCache.GetHouses())
            {
                ref var storage = ref house.GetStorageRW();
                ref var needsState = ref house.GetNeedsStateRW();

                for (var i = 0; i < needsState.Needs.Length; i++)
                {
                    var need = needsState.Needs[i];

                    if (need.TierIndex > house.TierIndex) break;
                    if (need.Type != PopulationNeedType.Product || need.Current > need.FetchThreshold) continue;

                    storage.Get(need.ProductHandle, out var count, out var putReservations, out _);
                    if (count > 0 || putReservations > 0) continue;

                    if (_agentCommonLogic.TryFetchProductFromProvider(agentDefinition, house, need.ProductHandle, 1)) break;
                }
            }
        }
    }
}