using UnityEngine;

namespace ET
{
    [FriendClass(typeof(Building))]
    public static class BuildingSystem
    {
        public static void FromMessage(this Building self, BuildingProto buildingProto)
        {
            self.Id = buildingProto.Id;
            self.Position = new Vector2(buildingProto.X, buildingProto.Y);
            self.ConfigId = buildingProto.ConfigId;
            self.Durable = buildingProto.Durable;
            if (buildingProto.Farmland != null)
            {
                var farmland = self.AddChildWithId<Farmland>(buildingProto.Farmland.id);
                farmland.FromMessage(buildingProto.Farmland);
            }
        }

        public static BuildingProto ToMessage(this Building self)
        {
            var proto= new BuildingProto() { Id = self.Id,
                ConfigId = self.ConfigId, 
                X = self.Position.x, 
                Y = self.Position.y,
                Durable = self.Durable};
            if (self.Config.Special == (int) StructureSpecialEnum.FARMLAND)
            {
                foreach (var v in self.Children.Values)
                {
                    if (v.GetType() == typeof (Farmland))
                    {
                        proto.Farmland = ((Farmland) v).ToMessage();
                    }
                }
            }

            return proto;
        }

        public static void DurableReduce(this Building self)
        {
            if (self.Durable == 0)
            {
                return;
            }
            self.Durable -= self.Config.DurableCoefficient;
            if (self.Durable < 0)
            {
                self.Durable = 0;
            }
        }

        public static void Repair(this Building self)
        {
            self.Durable = self.Config.Durable;
        }
    }
}