{{- /*
Copyright Broadcom, Inc. All Rights Reserved.
SPDX-License-Identifier: APACHE-2.0
*/}}

{{- if .Values.controller.networkPolicy.enabled }}
kind: NetworkPolicy
apiVersion: {{ include "common.capabilities.networkPolicy.apiVersion" . }}
metadata:
  name: {{ template "argo-workflows.controller.fullname" . }}
  namespace: {{ include "common.names.namespace" . | quote }}
  {{- $versionLabel := dict "app.kubernetes.io/version" ( include "common.images.version" ( dict "imageRoot" .Values.controller.image "chart" .Chart ) ) }}
  {{- $labels := include "common.tplvalues.merge" ( dict "values" ( list .Values.commonLabels $versionLabel ) "context" . ) }}
  labels: {{- include "common.labels.standard" ( dict "customLabels" $labels "context" $ ) | nindent 4 }}
    app.kubernetes.io/part-of: argo-workflows
    app.kubernetes.io/component: controller
  {{- if .Values.commonAnnotations }}
  annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
  {{- end }}
spec:
  {{- $podLabels := include "common.tplvalues.merge" ( dict "values" ( list .Values.controller.podLabels .Values.commonLabels ) "context" . ) }}
  podSelector:
    matchLabels: {{- include "common.labels.matchLabels" ( dict "customLabels" $podLabels "context" $ ) | nindent 6 }}
      app.kubernetes.io/part-of: argo-workflows
      app.kubernetes.io/component: controller
  policyTypes:
    - Ingress
    - Egress
  {{- if .Values.controller.networkPolicy.allowExternalEgress }}
  egress:
    - {}
  {{- else }}
  egress:
    # Allow dns resolution
    - ports:
        - port: 53
          protocol: UDP
        - port: 53
          protocol: TCP
        {{- range $port := .Values.controller.networkPolicy.kubeAPIServerPorts }}
        - port: {{ $port }}
        {{- end }}
    # Allow connection to Database
    - ports:
        - port: {{ include "argo-workflows.controller.database.port" . }}
      {{- if .Values.postgresql.enabled }}
      to:
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: postgresql
              app.kubernetes.io/instance: {{ .Release.Name }}
      {{- else if .Values.mysql.enabled }}              
        - podSelector:
            matchLabels:
              app.kubernetes.io/name: mysql
              app.kubernetes.io/instance: {{ .Release.Name }}
      {{- end }}
    {{- if .Values.controller.networkPolicy.extraEgress }}
    {{- include "common.tplvalues.render" ( dict "value" .Values.controller.networkPolicy.extraEgress "context" $ ) | nindent 4 }}
    {{- end }}
  {{- end }}
  ingress:
    # Allow inbound connections
    - ports:
        - port: {{ .Values.controller.containerPorts.metrics }}
        # The controller port is hardcoded in the source code.
        # Ref: https://github.com/argoproj/argo-workflows/blob/b35aabe86be9fa5db80299cebcfb29c32be21047/cmd/workflow-controller/main.go#L116
        - port: 6060
      {{- if not .Values.controller.networkPolicy.allowExternal }}
      from:
        - podSelector:
            matchLabels: {{- include "common.labels.matchLabels" ( dict "customLabels" .Values.commonLabels "context" $ ) | nindent 14 }}
        - podSelector:
            matchLabels:
              {{ template "argo-workflows.controller.fullname" . }}-client: "true"
        {{- if .Values.controller.networkPolicy.ingressNSMatchLabels }}
        - namespaceSelector:
            matchLabels:
              {{- range $key, $value := .Values.controller.networkPolicy.ingressNSMatchLabels }}
              {{ $key | quote }}: {{ $value | quote }}
              {{- end }}
          {{- if .Values.controller.networkPolicy.ingressNSPodMatchLabels }}
          podSelector:
            matchLabels:
              {{- range $key, $value := .Values.controller.networkPolicy.ingressNSPodMatchLabels }}
              {{ $key | quote }}: {{ $value | quote }}
              {{- end }}
          {{- end }}
        {{- end }}
      {{- end }}
    {{- if .Values.controller.networkPolicy.extraIngress }}
    {{- include "common.tplvalues.render" ( dict "value" .Values.controller.networkPolicy.extraIngress "context" $ ) | nindent 4 }}
    {{- end }}
{{- end }}
