using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

public class ItemConverter : JsonConverter<Item>
{
    //Overrides the ReadJson function.
    public override Item ReadJson(JsonReader reader, Type objectType, Item? existingValue, bool hasExistingValue, JsonSerializer serializer)
    {
        //Load the raw JSON object from the reader.
        JObject obj = JObject.Load(reader);

        // Read the "Type" field
        string? type = obj["Type"]?.ToString();

        //Create a temporary item object.
        Item item;

        //Uses the Type field to determine what kind of object to create, to allow for a mixed list.
        switch (type)
        {
            case "Healing":
                item = new HealingItem("", "", 0);
                break;

            case "Support":
                item = new SupportItem("", "");
                break;

            default:
                throw new JsonSerializationException($"Unknown item type: {type}");
        }

        // Populate the item with values from JSON
        serializer.Populate(obj.CreateReader(), item);
        return item;
    }

    //Overrides the default WriteJson method to allow for our different items.
    public override void WriteJson(JsonWriter writer, Item? value, JsonSerializer serializer)
    {
        JObject obj = JObject.FromObject(value, serializer);
        obj.WriteTo(writer);
    }
}