using System;
using System.Runtime.CompilerServices;
using JTNE.Protocol.Extensions;

[assembly : InternalsVisibleTo ("JTNE.Protocol.Test")]

namespace JTNE.Protocol {
    /// <summary>
    /// 
    /// </summary>
    public static class JTNESerializer {
        public static byte[] Serialize (JTNEPackage jTNEPackage, int minBufferSize = 256) {
            return Serialize<JTNEPackage> (jTNEPackage, minBufferSize);
        }

        public static JTNEPackage Deserialize (ReadOnlySpan<byte> bytes) {
            return Deserialize<JTNEPackage> (bytes);
        }

        public static byte[] Serialize<T> (T obj, int minBufferSize = 256) {
            var formatter = JTNEFormatterExtensions.GetFormatter<T> ();
            byte[] buffer = JTNEArrayPool.Rent (minBufferSize);
            try {
                var len = formatter.Serialize (ref buffer, 0, obj);
                return buffer.AsSpan (0, len).ToArray ();
            } finally {
                JTNEArrayPool.Return (buffer);
            }
        }

        public static T Deserialize<T> (ReadOnlySpan<byte> bytes) {
            var formatter = JTNEFormatterExtensions.GetFormatter<T> ();
            int readSize;
            return formatter.Deserialize (bytes, out readSize);
        }

        public static dynamic Deserialize (ReadOnlySpan<byte> bytes, Type type) {
            var formatter = JTNEFormatterExtensions.GetFormatter (type);
            return JTNEFormatterResolverExtensions.JTNEDynamicDeserialize (formatter, bytes, out int readSize);
        }
    }
}