fianu_uninstall_dependencies.sh

#!/bin/bash
# bashcleanup disable=BP5006

set -euo pipefail

##############################################################################
# Global Script Variables
##############################################################################
FULL_CLEANUP=false
if [[ "${1:-}" == "--full" ]]; then
  FULL_CLEANUP=true
fi

# Declare components with their corresponding namespaces
declare -A COMPONENT_NAMESPACES=(
  ["external-secrets"]="external-secrets"
  ["kafka"]="kafka"
  ["knative"]="default"    # knative uses the default namespace in the install script
  ["keycloak"]="keycloak"
  ["openfga"]="openfga"
  ["sigstore"]="sigstore"
)

##############################################################################
# Logging helper for structured logs
##############################################################################
log() {
  local level="$1"
  local action="$2"
  local details="$3"
  echo "$(date +'%Y-%m-%d %H:%M:%S') | LEVEL=$level | ACTION=$action | DETAILS=$details"
}

##############################################################################
# Namespace Utilities
##############################################################################
namespace_exists() {
  local ns="$1"
  kubectl get namespace "$ns" &>/dev/null
}

##############################################################################
# Uninstall a component's Helm chart
##############################################################################
uninstall_component() {
  local component="$1"
  local namespace="$2"

  log "INFO" "$component" "Uninstalling $component from namespace $namespace"
  if helm uninstall "$component" --namespace "$namespace"; then
    log "INFO" "$component" "$component uninstalled successfully."
  else
    log "WARN" "$component" "Failed to uninstall $component. It may have already been removed."
  fi
}

##############################################################################
# Main Control Flow
##############################################################################
main() {
  log "INFO" "Script Start" "Cleanup script started."

  # Uninstall each component
  for component in "${!COMPONENT_NAMESPACES[@]}"; do
    uninstall_component "$component" "${COMPONENT_NAMESPACES[$component]}"
  done

  # If --full flag is provided, delete the associated namespaces (skip default namespace)
  if [ "$FULL_CLEANUP" = true ]; then
    # Build a unique list of namespaces
    declare -A UNIQUE_NS=()
    for ns in "${COMPONENT_NAMESPACES[@]}"; do
      UNIQUE_NS["$ns"]=1
    done

    for ns in "${!UNIQUE_NS[@]}"; do
      if [ "$ns" = "default" ]; then
        log "INFO" "Namespace Cleanup" "Skipping deletion of the default namespace"
        continue
      fi
      if namespace_exists "$ns"; then
        log "INFO" "Namespace Cleanup" "Deleting namespace $ns"
        kubectl delete namespace "$ns"
      else
        log "INFO" "Namespace Cleanup" "Namespace $ns does not exist, skipping deletion"
      fi
    done
  fi

  log "SUCCESS" "Script Completion" "Cleanup script completed successfully."
}

main