#!/usr/bin/env bash
# Remove supaspin. Run on the server:  sudo bash uninstall.sh
# Asks before deleting instances (their data is gone for good) and before removing the
# shared cluster objects that the first-run setup created.
set -uo pipefail

[ "$(id -u)" -eq 0 ] || { echo "Run as root: sudo bash uninstall.sh" >&2; exit 1; }

if [ -x /snap/bin/microk8s.kubectl ]; then K=/snap/bin/microk8s.kubectl; else K=kubectl; fi

# Ask on the terminal (works when the script itself arrives through a pipe), else on stdin.
ask() {
  if { : </dev/tty; } 2>/dev/null; then read -r -p "$1" a </dev/tty; else read -r -p "$1" a; fi
}

if [ -x /usr/local/bin/supaspin ] && [ -f /etc/supaspin/config.yaml ]; then
  # Same discovery as `supaspin list`: namespaces named supaspin-<N>.
  nums="$($K get ns -o name 2>/dev/null | sed -n 's#^namespace/supaspin-\([0-9][0-9]*\)$#\1#p' | sort -n)"
  if [ -n "$nums" ]; then
    echo "Instances found: $(echo $nums)"
    ask "Delete ALL of them, with their databases and files? Type yes: "
    if [ "$a" = "yes" ]; then
      for n in $nums; do /usr/local/bin/supaspin delete "$n" --yes; done
    else
      echo "Keeping the instances; they will keep running without the supaspin command."
    fi
  fi
  ask "Also remove the shared cluster objects (StorageClass supaspin-local-sc, issuer supaspin-letsencrypt, PriorityClass supaspin-low, namespace supaspin-certs with saved certificates)? Type yes: "
  if [ "$a" = "yes" ]; then
    $K delete storageclass supaspin-local-sc --ignore-not-found
    $K delete clusterissuer supaspin-letsencrypt --ignore-not-found
    $K delete priorityclass supaspin-low --ignore-not-found
    $K delete namespace supaspin-certs --ignore-not-found
  fi
fi

rm -f /usr/local/bin/supaspin
rm -rf /usr/share/supaspin /etc/supaspin /var/lib/supaspin
echo "supaspin removed."