using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using UnityEngine;
using System.IO;
using System.Linq;
using TMPro;

public class CSVHelper
{
    /// <summary>
    /// 从CSC文件读取信息
    /// </summary>
    /// <param name="tableName">文件路径名（需要有文件后缀）</param>
    /// <param name="headCount">表头</param>
    /// <returns></returns>
    public static List<T> ReadInfoFromCSV<T>(string filedPath, int headCount)
    {
        List<T> tmpMsg = new List<T>();

        if (!File.Exists(filedPath))
        {
            Debug.LogError($"{filedPath}不存在");
            return null;
        }

        string config = File.ReadAllText(filedPath);

        if (!string.IsNullOrEmpty(config))
        {
            string[] tmpLines = config.Split('\n');

            for (int i = 1; i < tmpLines.Length; i++)
            {
                if (string.IsNullOrEmpty(tmpLines[i])) continue;

                if (tmpLines[i].Contains('\r')) tmpLines[i] = tmpLines[i].Replace("\r", "");

                string[] columns = tmpLines[i].Split(',');

                FieldInfo[] tmpFieldInfos = typeof(T).GetFields();

                if (tmpFieldInfos.Length != columns.Length)
                {
                    Debug.LogError(string.Format($"请检查{typeof(T).Name}与表格{filedPath}元素数量是否相同！！！！"));
                    return null;
                }

                object tmpT = Activator.CreateInstance(typeof(T));

                for (int j = 0; j < tmpFieldInfos.Length; j++)
                {
                    FieldInfo tmpFieldInfo = tmpFieldInfos[j];

                    tmpFieldInfo.SetValue(tmpT, columns[j].ToString());
                }

                tmpMsg.Add((T)tmpT);
            }
        }

        return tmpMsg;
    }

    /// <summary>
    /// 将数据信息写入到CSV文件中
    /// </summary>
    /// <typeparam name="T">类型</typeparam>
    /// <param name="ts">信息</param>
    /// <param name="path">路径</param>
    public static bool WriteInfoToCsv<T>(string path,List<T> ts)
    {
        bool tmpResult = false ;

        using (FileStream fs = new FileStream(path, FileMode.Create))
        {
            using (StreamWriter sw = new StreamWriter(fs, System.Text.Encoding.UTF8))
            {
                string tmpHead = string.Empty;

                FieldInfo[] tmpFieldInfos = typeof(T).GetFields();

                for (int i = 0;i < tmpFieldInfos.Length; i++)
                {
                    tmpHead += tmpFieldInfos[i].Name;

                    if (i < tmpFieldInfos.Length - 1) tmpHead += ",";
                }

                sw.WriteLine(tmpHead);

                for (int i = 0; i < ts.Count; i++)
                {
                    string operationInfo = string.Empty;

                    for (int j = 0;j < tmpFieldInfos.Length; j++)
                    {
                        operationInfo += tmpFieldInfos[j].GetValue(ts[i]).ToString();

                        if (j < tmpFieldInfos.Length - 1) operationInfo += ",";
                    }

                    if (i == ts.Count - 1) sw.Write(operationInfo);
                    else sw.WriteLine(operationInfo);
                }
            }
        }

        tmpResult = true;

        return tmpResult;
    }
}