using System.Collections.Generic;
using System.IO;

namespace MeidoPhotoStudio.Plugin
{
    public class LightManagerSerializer : Serializer<LightManager>
    {
        private const short version = 1;
        private static Serializer<DragPointLight> LightSerializer => Serialization.Get<DragPointLight>();

        public override void Serialize(LightManager manager, BinaryWriter writer)
        {
            writer.Write(LightManager.header);
            writer.WriteVersion(version);

            List<DragPointLight> list = GetLightList(manager);
            writer.Write(list.Count);
            foreach (var light in list) LightSerializer.Serialize(light, writer);
        }

        public override void Deserialize(LightManager manager, BinaryReader reader, SceneMetadata metadata)
        {
            manager.ClearLights();

            _ = reader.ReadVersion();

            var lightCount = reader.ReadInt32();

            List<DragPointLight> list = GetLightList(manager);
            
            
            LightSerializer.Deserialize(list[0], reader, metadata);
            for (var i = 1; i < lightCount; i++)
            {
                manager.AddLight();
                LightSerializer.Deserialize(list[i], reader, metadata);
            }
        }

        private static List<DragPointLight> GetLightList(LightManager manager)
            => Utility.GetFieldValue<LightManager, List<DragPointLight>>(manager, "lightList");
    }
}