#!/usr/bin/env bash

set -euo pipefail

project_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)
expected_context=kubernetes-admin@kubernetes
context=$(kubectl config current-context)

if [[ "${context}" != "${expected_context}" ]]; then
  echo "Expected Kubernetes context ${expected_context}, found ${context}." >&2
  exit 1
fi

sudo systemctl stop plexmediaserver.service
if sudo systemctl is-active --quiet plexmediaserver.service; then
  echo 'plexmediaserver.service is still active; refusing to copy its database.' >&2
  exit 1
fi
if pgrep -u plex >/dev/null; then
  echo 'A process owned by plex is still running; refusing to copy its database.' >&2
  exit 1
fi

database_root='/var/lib/plex/Plex Media Server/Plug-in Support/Databases'
for database in \
  "${database_root}/com.plexapp.plugins.library.db" \
  "${database_root}/com.plexapp.plugins.library.blobs.db"; do
  result=$(sudo -u plex '/usr/lib/plexmediaserver/Plex SQLite' "${database}" 'PRAGMA quick_check;')
  if [[ "${result}" != ok ]]; then
    echo "SQLite quick_check failed for ${database}: ${result}" >&2
    exit 1
  fi
done

kubectl apply --filename "${project_dir}/namespace.yaml"
kubectl apply --filename "${project_dir}/plex.yaml" \
  --selector=app.kubernetes.io/component=state
kubectl --namespace plex wait \
  --for=jsonpath='{.status.phase}'=Bound \
  persistentvolumeclaim/plex-config \
  --timeout=10m

if kubectl --namespace plex get job plex-archlinux-migration >/dev/null 2>&1; then
  echo 'Job plex-archlinux-migration already exists; inspect it instead of overwriting it.' >&2
  exit 1
fi
kubectl apply --filename "${project_dir}/migration-job.yaml"
echo 'Migration started. Follow it with:'
echo '  kubectl -n plex logs -f job/plex-archlinux-migration'
echo '  kubectl -n plex wait --for=condition=complete job/plex-archlinux-migration --timeout=12h'