using System.Collections.Concurrent;
using MessagePack;

namespace Dpz.Core.WebApi.MessagePackFormatters;

/// <summary>
/// 序列化类型缓存
/// </summary>
/// <param name="formatterResolver"></param>
public class SerializableTypesCache(IFormatterResolver formatterResolver)
{
    private readonly IFormatterResolver _formatterResolver =
        formatterResolver ?? throw new ArgumentNullException(nameof(formatterResolver));
    private readonly ConcurrentDictionary<Type, bool> _serializableTypes = new();

    /// <summary>
    ///     检查类型是否可读
    /// </summary>
    /// <param name="type">检查类型</param>
    /// <returns></returns>
    /// <exception cref="T:System.ArgumentNullException"><paramref name="type" /> is <see langword="null" /></exception>
    public bool CanSerialize(Type type)
    {
        ArgumentNullException.ThrowIfNull(type);

        return _serializableTypes.GetOrAdd(
            type,
            x => _formatterResolver.GetFormatterDynamic(x) != null
        );
    }
}