using IwbZero.Expr;
using IwbZero.IwbBase;

namespace WeEngine.Functions
{
    /// <summary>
    /// 节点变量赋值
    /// </summary>
    public class FunSetVariable : RunTimeBase, IFunction
    {
        public string Invoke(ExprObject exprObj)
        {
            ExprObject child = exprObj.GetChild(0), child2 = exprObj.GetChild(2), child3 = exprObj.GetChild(4), child4 = exprObj.GetChild(6), child5 = exprObj.GetChild(8);
            GetPackage(child.Expr);
            if ( (child3==null || child4==null))
            {
                return "FALSE";
            }

            var node = child5 == null ? Rp.GetNodeByPath(child2.Expr) : Rp.GetNodeByPath(child5.Expr);
            node.SetVariable($"{IwbVariableType.Local}{child3.Expr}",child4.Expr);
            return "TRUE";
        }
    }
}