using System;
using System.IO;
using System.Text;

namespace YGOSharp.Network.Utils
{
    public static class BinaryExtensions
    {
        public static void WriteUnicode(this BinaryWriter writer, string text, int len)
        {
            byte[] unicode = Encoding.Unicode.GetBytes(text);
            byte[] result = new byte[len * 2];
            int max = len * 2 - 2;
            Array.Copy(unicode, result, unicode.Length > max ? max : unicode.Length);
            writer.Write(result);
        }

        public static string ReadUnicode(this BinaryReader reader, int len)
        {
            byte[] unicode = reader.ReadBytes(len * 2);
            string text = Encoding.Unicode.GetString(unicode);
            int index = text.IndexOf('\0');
            if (index > 0) text = text.Substring(0, index);
            return text;
        }

        public static byte[] ReadToEnd(this BinaryReader reader)
        {
            return reader.ReadBytes((int)(reader.BaseStream.Length - reader.BaseStream.Position));
        }
    }
}
