Helm get Values depending on environment

Question

I want to select different resources limits/requests depending on the environment (which is given as input)

This is my Values.yaml file inside my chart

resources:
 dev:
   limits:
     cpu: 100m
     memory: 100Mi
   requests:
     cpu: 20m
     memory: 10Mi
 prod:
   limits:
     cpu: 1000m
     memory: 1000Mi
   requests:
    cpu: 200m
    memory: 100Mi

I deploy the chart using this command:

helm upgrade --install --values=global_values.yaml

and inside global_values.yaml:

global:
  environmentSuffix: prod

What I want to do is selecting the right resources based on environmentSuffix (dev ... prod. 4 environemnts in total)

Something like this (it is not working of course):

resources:
  limits:
    cpu: {{ .Values.resources[.Values.global.environmentSuffix].limits.cpu }}
    memory: {{ .Values.resources[.Values.global.environmentSuffix].limits.memory}}
  requests:
    cpu: {{ .Values.resources[.Values.global.environmentSuffix].requests.cpu }}
    memory: {{ .Values.resources[.Values.global.environmentSuffix].requests.memory}}

How can I achieve this?