using MessagePack;
using MessagePack.Resolvers;
using Shaker.Model;
using System;
using System.Collections.Generic;
using System.Data.SqlTypes;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;

namespace Shaker.Tools
{
    public static class Tools
    {
        private static MessagePackSerializerOptions options = TypelessContractlessStandardResolver.Options.WithOmitAssemblyVersion(true);

        public static byte[] GetBytes<T>(this T value)
        {
            return MessagePack.MessagePackSerializer.Serialize(value, options);
        }
        public static T GetValue<T>(this byte[] data)
        {
            return MessagePackSerializer.Deserialize<T>(data, options);
        }
        /// <summary>
        /// 压缩数据包
        /// </summary>
        /// <param name="arrays"></param>
        /// <returns></returns>
        public static byte[] CompressionBytes(byte[] arrays)
        {
            if (arrays == null || arrays.Length == 0) return new byte[0];
            using (MemoryStream ms = new MemoryStream())
            {
                using (System.IO.Compression.DeflateStream ds = new System.IO.Compression.DeflateStream(ms, System.IO.Compression.CompressionLevel.SmallestSize, true))
                {
                    ds.Write(arrays, 0, arrays.Length);
                }
                return ms.ToArray();
            }
        }
        /// <summary>
        /// 解压数据包
        /// </summary>
        /// <param name="arrays"></param>
        /// <returns></returns>
        public static byte[] DecompressionBytes(byte[] arrays)
        {
            if (arrays == null || arrays.Length == 0) return new byte[0];
            using (MemoryStream ms = new MemoryStream(arrays))
            {
                using (System.IO.Compression.DeflateStream ds = new System.IO.Compression.DeflateStream(ms, System.IO.Compression.CompressionMode.Decompress, true))
                {
                    using (MemoryStream memoryStream = new MemoryStream())
                    {
                        ds.CopyTo(memoryStream);
                        return memoryStream.ToArray();
                    }
                }
            }
        }
        public static string GetUnit<T>(this T e) where T: Enum
        {
            if (e == null || !e.GetType().IsEnum) return "";
            return (e.GetType()?
                     .GetField(e.ToString())?
                     .GetCustomAttributes(typeof(ResultChannelUnitAttribute), false)
                     .FirstOrDefault() as ResultChannelUnitAttribute)?.Unit ?? "";
        }
        public static T[] FixedArray<T>(this T[] value,int lenght)
        {
            if (lenght == 0) return Array.Empty<T>();
            if (value == null) return [.. Enumerable.Range(0, lenght).Select(x => Activator.CreateInstance<T>())];
            if (value.Length > lenght) return value[0..lenght];
            return [.. value,..Enumerable.Range(0, lenght - value.Length).Select(x=>Activator.CreateInstance<T>())];
        }
        public static IEnumerable<T> FixedArray<T>(this IEnumerable<T> value, int lenght)
        {
            if (lenght == 0) return Array.Empty<T>();
            if (value == null) return [.. Enumerable.Range(0, lenght).Select(x => Activator.CreateInstance<T>())];
            if (value.Count() > lenght) return value.Take(lenght);
            return [.. value, .. Enumerable.Range(0, lenght - value.Count()).Select(x => Activator.CreateInstance<T>())];
        }
    }
}