﻿using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WolvenKit.Bundles
{
    class TDynArray<T> : List<T>, ISerializable where T : ISerializable, new()
    {
        public void Deserialize(BinaryReader reader)
        {
            
            this.Clear();
            Int32 count = reader.ReadVLQInt32();
            if (count == 0)
                return;
            for (int i = 0; i < count; i++)
            {
                var item = new T();
                item.Deserialize(reader);
                this.Add(item);
            }

            Console.WriteLine(new T().GetType().Name + " - Reader is at: " + reader.BaseStream.Position + "[0x"+ reader.BaseStream.Position.ToString("X") + "] left: " + ((int)reader.BaseStream.Length-reader.BaseStream.Position) + "[0x" + ((int)reader.BaseStream.Length-reader.BaseStream.Position).ToString("X") + "]");
        }

        public void Serialize(BinaryWriter writer)
        {
            writer.WriteVLQInt32(this.Count);
            if (this.Count == 0)
                return;
            foreach(var item in this)
            {
                item.Serialize(writer);
            }
        }


    }

    public static class brext
    {
        public static int ReadVLQInt32(this BinaryReader br)
        {
            var b1 = br.ReadByte();
            var sign = (b1 & 128) == 128;
            var next = (b1 & 64) == 64;
            var size = b1 % 128 % 64;
            var offset = 6;
            while (next)
            {
                var b = br.ReadByte();
                size = (b % 128) << offset | size;
                next = (b & 128) == 128;
                offset += 7;
            }
            return sign ? size * -1 : size;
        }

        public static void WriteVLQInt32(this BinaryWriter bw, int value)
        {
            bool negative = value < 0;
            value = Math.Abs(value);
            byte b = (byte)(value & 0x3F);
            value >>= 6;
            if (negative)
            {
                b |= 0x80;
            }
            bool cont = value != 0;
            if (cont)
            {
                b |= 0x40;
            }
            bw.Write(b);
            while (cont)
            {
                b = (byte)(value & 0x7F);
                value >>= 7;
                cont = value != 0;
                if (cont)
                {
                    b |= 0x80;
                }
                bw.Write(b);
            }
        }
    }
}
