using System;
using IwbZero.Expr;
using IwbZero.ToolCommon.StringModel;

namespace IwbZero.ExprFunctions.Functions
{
    /// <summary>
    /// 获取日期（某月最后一天）
    /// </summary>
    public class FunGetLFdm:IIwbFunction
    {
        private readonly FunGetFdm _fdm = new FunGetFdm();
        public string Invoke(ExprObject exprObj)
        {
            string pcStr = this._fdm.Invoke(exprObj);
            DateTime dateTime = pcStr.StrToDt().AddMonths(1);
            return (dateTime - new TimeSpan(1, 0, 0, 0)).DtToDateStr();
        }
    }
}