dynamic indexing helm

file.yaml

##https://stackoverflow.com/questions/67380335/how-to-fetch-a-value-inside-an-array-using-helm-template
so the values.yaml looks something like 

########values.yaml########
ep:
  staging:
    ricochet:
      ash: val1
      mini: val2
    pikachu:
      ash: val3
  production:
    ricochet:
      ash: val4
      mini: val5
    pikachu:
      ash: val6

#####another-values.yaml#########
doraemon:
  gadget1: ricochet
  gadget2: ash
  env: staging

##Endgoal: how to get val1 dynamically?
##this works, 
####{{ (index .Values "ep" "staging" "ricochet" "ash") 
##but how to derive staging from values.yaml itself?
##this fails,
{{ (index .Values "ep" .Values.doraemon.env .Values.doraemon.gadget1 .Values.doraemon.gadget2) }}

{{ (index .Values "ep" (index .Values.doraemon "env") (index .Values.doraemon "gadget1") (index .Values.doraemon "gadget2")) }}

This is how it works

For readability can use the following as well

{{- with $doraemon := .Values.doraemon -}}
{{- (index .Values "ep" $doraemon.env $doraemon.gadget1 $doraemon.gadget2) -}}