using System.Diagnostics;
using System.IO;
using System.IO.Compression;
using System.Text;
using Newtonsoft.Json;

namespace Zerolauncher.Manager
{
    class DataStream
    {
        private const string path = "user.data";
        public static Data dataStream;

        public static void Load()
        {
            if (File.Exists(path))
            {
                dataStream = JsonConvert.DeserializeObject<Data>(Encoding.UTF8.GetString(Decompress(File.ReadAllBytes(path))));
            }
            else
            {
                dataStream = JsonConvert.DeserializeObject<Data>(
                    "{\"teamIndex\":0,\"Groups\":[{\"Name\":\"队伍1\", \"Accounts\": [{\"providerId\":0,\"userName\":\"test\",\"userPWD\":\"test\",\"nickName\":\"测试账号\",\"serverId\":\"1\"}]}], \"engine_cache_ver\": 0}");
            }
            
        }

        public static void write()
        {
            string? data = JsonConvert.SerializeObject(dataStream);
            Trace.WriteLine(data);
            if (data == null) return;
            File.WriteAllBytes(path, CompressBytes(Encoding.UTF8.GetBytes(data)));
        }

        //压缩字节
        //1.创建压缩的数据流 
        //2.设定compressStream为存放被压缩的文件流,并设定为压缩模式
        //3.将需要压缩的字节写到被压缩的文件流
        public static byte[] CompressBytes(byte[] bytes)
        {
            using (MemoryStream compressStream = new MemoryStream())
            {
                using (var zipStream = new GZipStream(compressStream, CompressionMode.Compress))
                    zipStream.Write(bytes, 0, bytes.Length);
                return compressStream.ToArray();
            }
        }

        //解压缩字节
        //1.创建被压缩的数据流
        //2.创建zipStream对象，并传入解压的文件流
        //3.创建目标流
        //4.zipStream拷贝到目标流
        //5.返回目标流输出字节
        public static byte[] Decompress(byte[] bytes)
        {
            using (var compressStream = new MemoryStream(bytes))
            {
                using (var zipStream = new GZipStream(compressStream, CompressionMode.Decompress))
                {
                    using (var resultStream = new MemoryStream())
                    {
                        zipStream.CopyTo(resultStream);
                        return resultStream.ToArray();
                    }
                }
            }
        }
    }

    public class Account
    {
        public int providerId;
        public string userName, userPWD, nickName, serverId;
    }

    class Group
    {
        public string Name;
        public List<Account> Accounts;
    }

    struct Data
    {
        public int teamIndex;
        public List<Group> Groups;
        public int engine_cache_ver;
    }
}