using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.ChangeTracking;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
using Microsoft.Extensions.DependencyInjection;
using Newtonsoft.Json;

namespace SCHALE.Common.Database
{
    public static class ServicesExtesions
    {
        public static void AddMongoDBProvider(this IServiceCollection services, string connectionString)
        {
            services.AddDbContext<SCHALEContext>(opt =>
            {
                opt.UseMongoDB(connectionString, "SCHALE");
            });
        }
    }

    public static class ValueConversionExtensions
    {
        public static PropertyBuilder<T> HasJsonConversion<T>(this PropertyBuilder<T> propertyBuilder) where T : class, new()
        {
            ValueConverter<T, string> converter = new ValueConverter<T, string>
            (
                v => JsonConvert.SerializeObject(v),
                v => JsonConvert.DeserializeObject<T>(v) ?? new T()
            );

            ValueComparer<T> comparer = new ValueComparer<T>
            (
                (l, r) => JsonConvert.SerializeObject(l) == JsonConvert.SerializeObject(r),
                v => v == null ? 0 : JsonConvert.SerializeObject(v).GetHashCode(),
                v => JsonConvert.DeserializeObject<T>(JsonConvert.SerializeObject(v))
            );

            propertyBuilder.HasConversion(converter);
            propertyBuilder.Metadata.SetValueConverter(converter);
            propertyBuilder.Metadata.SetValueComparer(comparer);

            return propertyBuilder;
        }
    }
}