using Microsoft.EntityFrameworkCore.ChangeTracking;
using Microsoft.EntityFrameworkCore.Metadata;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.Json.Serialization;
using System.Text.Json;
using System.Threading.Tasks;

namespace Persistence.Database;

public static class EFExtensions
{
    private static readonly JsonSerializerOptions jsonSerializerOptions = new()
    {
        AllowTrailingCommas = true,
        WriteIndented = true,
        NumberHandling = JsonNumberHandling.AllowReadingFromString | JsonNumberHandling.AllowNamedFloatingPointLiterals,
    };

    public static Microsoft.EntityFrameworkCore.Metadata.Builders.PropertyBuilder<TProperty> HasJsonConversion<TProperty>(
        this Microsoft.EntityFrameworkCore.Metadata.Builders.PropertyBuilder<TProperty> builder)
        => HasJsonConversion(builder, jsonSerializerOptions);

    public static Microsoft.EntityFrameworkCore.Metadata.Builders.PropertyBuilder<TProperty> HasJsonConversion<TProperty>(
        this Microsoft.EntityFrameworkCore.Metadata.Builders.PropertyBuilder<TProperty> builder,
        JsonSerializerOptions jsonSerializerOptions)
    {
        builder.HasConversion(
                    s => JsonSerializer.Serialize(s, jsonSerializerOptions),
                    s => JsonSerializer.Deserialize<TProperty>(s, jsonSerializerOptions)!);

        ValueComparer<TProperty> valueComparer = new(
            (a, b) =>
                (a != null) && (b != null)
                    ? a.GetHashCode() == b.GetHashCode()
                    : (a == null) && (b == null),
            i => (i == null) ? -1 : i.GetHashCode(),
            i => i);

        builder.Metadata.SetValueComparer(valueComparer);
        return builder;
    }

}