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

namespace IwbZero.ExprFunctions.Functions
{
    /// <summary>
    /// 获取随机数
    /// </summary>
    public class FunGetRandom : IIwbFunction
    {
        public string Invoke(ExprObject exprObj)
        {
            var child = exprObj.GetChild(0);
            var child2 = exprObj.GetChild(2);
            int num1 = child?.Expr.ValI()??0, num2= child2?.Expr.ValI()??0;
            if (num2 == 0)
            {
                num2 =  num1 > 100 ? 100 : num1 < 0 ? 0 : num1;
                num1 = 0;
            }

            if (num2 < num1)
            {
                var num3 = num2;
                num2 = num1;
                num1 = num3;
            }
            var random = new Random().Next(num1,num2);
          
            return random+"";
        }
    }
}