using Microsoft.EntityFrameworkCore;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Pf2eModel;
using Pf2eModel.Model;
using Pf2eModel.Model.Base;
using Pf2eModel.Model.Base.Source;
using Pf2eModel.Model.Common.I18n;
using Pf2eModel.Model.Structure;
using System.ComponentModel;

namespace Pf2eViewer;
internal class EntityConverter : JsonConverter
{
    private readonly Pf2eDbContext _context = new();

    public override bool CanConvert(Type objectType)
    {
        return objectType == typeof(Entity) || objectType.IsAssignableTo(typeof(IEntity));
    }

    private Dictionary<string, object?> DictionarySerialization(object source)
    {
        Dictionary<string, object?> dictionary = [];

        foreach (PropertyDescriptor property in TypeDescriptor.GetProperties(source))
        {
            if (property.Attributes.OfType<JsonIgnoreAttribute>().Any())
            {
                continue;
            }

            object? v = property.GetValue(source);
            dictionary.Add(property.Name, v);
        }

        return dictionary;
    }

    public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
    {
        Dictionary<string, object?> dictionary = DictionarySerialization(value!);
        /*
        if (value.GetType() != typeof(Entity))
        {
            dictionary.Remove("Entity");
        }
        */
        switch (value)
        {
            case Entity entity:
                ProcessEntity(dictionary, entity);
                break;

            case Trait trait:
                ProcessTrait(dictionary, trait);
                break;
        }

        writer.WriteStartObject();

        foreach (KeyValuePair<string, object> keyValuePair in dictionary)
        {
            writer.WritePropertyName(keyValuePair.Key, true);

            serializer.Serialize(writer, keyValuePair.Value);
        }

        writer.WriteEndObject();
    }

    private void ProcessTrait(Dictionary<string, object?> dictionary, Trait trait)
    {
        LocaleString name = trait.Entity?.Name ?? _context.Entities.Where(e => e.Id == trait.Id).Select(e => e.Name).FirstOrDefault()!;

        dictionary.Remove("Entity");
        dictionary.Remove("Entities");
        dictionary.Add("Name", name.ToString());
    }

    private void ProcessEntity(Dictionary<string, object?> dictionary, Entity entity)
    {
        dictionary.Remove("Description");
    }
    
    public override bool CanRead => false;

    public override object? ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
    {
        throw new NotImplementedException("Unnecessary because CanRead is false. The type will skip the converter.");
    }
}