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

namespace Game.Config
{
    public class CsvReader
    {
        private List<string[]> rowDatas;
        private Dictionary<string, int> fieldKey;
        private string path;
        private Encoding encoding;
        private bool isgb2312;
        private int fieldLine;
        private int typeLine;
        private int startLine;
        public string Name;

        public int StartLine { get { return startLine; } set { startLine = value; } }
        public CsvReader(string csvpath, int fl = 0,int tl = 1 ,int sl = 2,Encoding edg = null)
        {
            if (string.IsNullOrEmpty(csvpath))
            {
                throw new ArgumentNullException("path");
            }
            fieldLine = fl;
            typeLine = tl;
            startLine = sl;
            rowDatas = new List<string[]>();
            fieldKey = new Dictionary<string, int>();
            encoding = edg;
            path = csvpath;
            if (edg == null)
            {
                encoding = Encoding.UTF8;
                isgb2312 = false;
            }
            else if (edg != Encoding.UTF8)
            {
                isgb2312 = true;
            }
            Name =FileHelper.GetName(path);
            ReadFromCsv();
            InitFieldKey();
        }
        /// <summary>
        /// 
        /// </summary>
        /// <param name="name"></param>
        /// <param name="bytes"></param>
        /// <param name="fl">字段名</param>
        /// <param name="tl">类型名</param>
        /// <param name="sl">多少行开始</param>
        public CsvReader(string name,byte[] bytes,int fl = 0, int tl = 1, int sl = 2)
        {
            fieldLine = fl;
            typeLine = tl;
            startLine = sl;
            rowDatas = new List<string[]>();
            fieldKey = new Dictionary<string, int>();
            isgb2312 = false;
            Name = name;
            ReadFromMemory(bytes);
            InitFieldKey();
        }

        public string[][] RowDatas
        {
            get
            {
                return rowDatas.ToArray();
            }
        }

        public string[] Fields()
        {
            return rowDatas[fieldLine];
        }

        public string GetDataByFieldName(string fieldName,int line)
        {
            string ret = "";
            if (fieldKey.ContainsKey(fieldName) && rowDatas.Count > line)
            {
                ret = rowDatas[line][fieldKey[fieldName]];
            }
            return ret;
        }
        public void SetDataByFieldName(string fieldName, string value,int line)
        {
            
            if (fieldKey.ContainsKey(fieldName) && rowDatas.Count > line)
            {
                 rowDatas[line][fieldKey[fieldName]] = value;
            }
          
        }
        public bool HasField(string fieldName)
        {
            return fieldKey.ContainsKey(fieldName);
        }
        public string[] Types()
        {
            return rowDatas[typeLine];
        }


        public string GetString()
        {
            StringBuilder stringBuilder = new StringBuilder();

            for (int i = 0; i < rowDatas.Count; i++)
            {
                stringBuilder.Append(CsvWriter<GameData>.ToCsvLine(rowDatas[i]));
            }

            return stringBuilder.ToString();
        }
        private void ReadFromCsv()//改异步
        {
            string[] datas = File.ReadAllLines(path, encoding);
            if (datas == null || datas.Length <= 0)
            {
                return;
            }
            if (isgb2312)
            {
                for (int i = 0; i < datas.Length; i++)
                {
                    datas[i] = FileHelper.GB2312ToUTF8(datas[i]);
                }
            }

            foreach (var item in datas)
            {
                string[] rdt = FileHelper.SpiltData(item);
                rowDatas.Add(rdt);
            }
        }


        private void ReadFromMemory(byte[] bytes)
        {
            string str = Encoding.UTF8.GetString(bytes);
            string[] datas = str.Split(new string[] { "\r\n" }, StringSplitOptions.RemoveEmptyEntries);
            foreach (var item in datas)
            {
                string[] rdt = FileHelper.SpiltData(item);
                rowDatas.Add(rdt);
            }
        }

        private void InitFieldKey()
        {
            string[] fields = rowDatas[fieldLine];

            for (int i = 0; i < fields.Length; i++)
            {
                if (fieldKey.ContainsKey(fields[i]))
                {
                    Debug.Log($"Field 重复 ：{fields[i]} , i = {i}");
                    continue;
                }
                fieldKey.Add(fields[i],i);
            }
        }
       
        
    }
}