using System;

using System.Collections.Generic;

using System.Text;


namespace Game.Config
{
    public class CsvWriter<T> where T : GameData
    {
        private StringBuilder data;
        private string name;
        private string path;


        public string Data { get => data.ToString(); }
        public CsvWriter(string wpath,string fname,List<T> datas, GameDataFormatInfo dataFormatInfo = null)
        {
            data = new StringBuilder();
            name = fname;
            path = wpath;
            GameDataToString (datas,dataFormatInfo);
        }


        private void GameDataToString(List<T> datas, GameDataFormatInfo dataFormatInfo)
        {
            //Type type = Type.GetType($"Game.Config.{name}");
            Type type = typeof(T);
            GameDataFormatInfo info = dataFormatInfo;
            if (info == null)
                info = null;//GameDatabase.Instance.GetGameDataFormatInfo(name);
            if (info == null) { return; }
            data.Append(ToCsvLine(info.Fileds));
            data.Append(ToCsvLine(info.Types));
            foreach (GameData gd in datas)
            {
                string[] linedatas = ExcelParser.Deserialize(type, gd,info.Fileds); 
                string line = ToCsvLine(linedatas);
                data.Append(line);
            }
        }


        public void Write(Action callback = null)
        {
            //FileHelper.WirteStringToFileAsync(path, data.ToString(), callback);
            FileHelper.WirteStringToFile(path, data.ToString());
        }

        public static string ToCsvLine(string[] datas)
        {
            StringBuilder sb = new StringBuilder();
            int length = datas.Length;
            int end = length-1;
            for (int i = 0; i < length; i++)
            {
                string str = datas[i];
                if (str.IndexOf(',') >= 0)
                {
                    str = FileHelper.AddHeadandTailChar(str, '"');
                }
                if (i < end)
                {
                    sb.Append($"{str},");
                }
                else
                {
                    sb.Append($"{str}\r\n");
                }
            }
            return sb.ToString();
        }
    }
}