---
# InitContainer to substitute secrets into AlertManager config
# This allows us to use environment variables from secrets in the config file
apiVersion: v1
kind: ConfigMap
metadata:
  name: alertmanager-init-script
  namespace: monitoring
data:
  init-config.sh: |
    #!/bin/sh
    set -e

    # Read the template config
    TEMPLATE=$(cat /etc/alertmanager-template/alertmanager.yml)

    # Substitute environment variables
    echo "$TEMPLATE" | \
      sed "s|{{ .smtp_host }}|${SMTP_HOST}|g" | \
      sed "s|{{ .smtp_from }}|${SMTP_FROM}|g" | \
      sed "s|{{ .smtp_username }}|${SMTP_USERNAME}|g" | \
      sed "s|{{ .smtp_password }}|${SMTP_PASSWORD}|g" | \
      sed "s|{{ .slack_webhook_url }}|${SLACK_WEBHOOK_URL}|g" \
      > /etc/alertmanager-final/alertmanager.yml

    echo "AlertManager config initialized successfully"
    cat /etc/alertmanager-final/alertmanager.yml