using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Text.RegularExpressions;

namespace ZKLT.Hadoop.Model
{
    /// <summary>
    /// 命令函数
    /// </summary>
    public class HDP_CommandAction
    {
        /// <summary>
        /// 当前日期
        /// </summary>
        public const string DATENOW = "DATE_NOW()";

        /// <summary>
        /// 唯一码
        /// </summary>
        public const string UUID = "UUID()";

        /// <summary>
        /// 转换命令
        /// </summary>
        /// <param name="action">函数</param>
        /// <param name="param">参数</param>
        /// <returns>命令</returns>
        public static object Convert(string action, JToken param)
        {
            if (action == DATENOW)
            {
                return DateTime.Now;
            }
            else if (action == UUID)
            {
                return Guid.NewGuid().ToString();
            }
            else {
                return action;
            }
        }

        /// <summary>
        /// 列转换
        /// </summary>
        /// <param name="column">列</param>
        /// <param name="param">参数</param>
        /// <param name="action">公式</param>
        /// <returns></returns>
        public static string ColConvert(HDP_Column column, Dictionary<string, object> param,object value) {
            string _guid;
            if (value is string) {
                string _action = value.ToString()!;
                Regex _regex1 = new Regex(@"(?<=(\+\=))[\d\.]+");
                if(_regex1.IsMatch(_action))
                {
                    _guid = Guid.NewGuid().ToString("N");
                    param.Add(_guid,_regex1.Match(_action).Value);
                    return @$"`{column.Key}` + @{_guid}";
                }
                Regex _regex2 = new Regex(@"(?<=(\-\=))[\d\.]+");
                if (_regex2.IsMatch(_action))
                {
                    _guid = Guid.NewGuid().ToString("N");
                    param.Add(_guid, _regex2.Match(_action).Value);
                    return @$"`{column.Key}` - @{_guid}";
                }
            }
            param.Add(column.Key!, value);
            return $@"@{column.Key}";
        }
    }
}