#!/usr/bin/env bash

set -euo pipefail

# init_cloudnative_pg.sh
# Purpose:
# - Distribute administrator ed25519 key pair to CloudNative‑PG as a Kubernetes Secret for cert auth
# - Configure Kerberos (GSSAPI) using external Kerberos KDC
# - Patch CNPG cluster to enable TLS and GSSAPI where possible
#
# Usage:
#   ./init_cloudnative_pg.sh start|stop|status|restart
#   ./init_cloudnative_pg.sh initialize          # install CNPG, create cluster, configure secrets + Kerberos
#   ./init_cloudnative_pg.sh update|reload       # re-apply/patch
#
# Requirements:
# - init_openbao.sh has been run (OpenBao running as a local container)
# - $PROLE_HOME/env.sh or $HOME/.prole/env.sh defining PROLE_SERVICE
# - Optional: CNPG_MANIFEST_OVERRIDE to apply a recovery manifest instead of kustomize

# Initialize SCRIPT_DIR
SCRIPT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)

# Load environment and config via prole_cfg.sh
# shellcheck disable=SC1090
source "$SCRIPT_DIR/prole_cfg.sh"

if [[ "${1:-}" == "--mode" || "${1:-}" == "-m" ]]; then
  prole_set_mode "${2:-}"
  shift 2
elif [[ "${1:-}" == --mode=* || "${1:-}" == -m=* ]]; then
  prole_set_mode "${1#*=}"
  shift
fi

if [[ -z "${PROLE_SERVICE:-}" ]]; then
  echo "ERROR: PROLE_SERVICE is not defined. Provide PROLE_HOME/env.sh or ~/.prole/env.sh" >&2
  exit 1
fi

ACTION=${1:-}
CNPG_CLUSTER_NAME=${2:-${CNPG_CLUSTER_NAME:-prole-db}}
OPENBAO_NAME=${OPENBAO_NAME:-openbao}
REALM=${REALM:-PROLE.ORG}
DOMAIN=${DOMAIN:-prole.org}
KRB5_KDC=${KRB5_KDC:-}
KRB5_ADMIN=${KRB5_ADMIN:-}
CNPG_MANIFEST_OVERRIDE=${CNPG_MANIFEST_OVERRIDE:-}
PROLE_HOME=${PROLE_HOME:-$(cd "$SCRIPT_DIR/.." && pwd)}
BACKUP_DIR=${BACKUP_DIR:-$PROLE_HOME/prole/backup}
BACKUP_WAIT_TIMEOUT=${BACKUP_WAIT_TIMEOUT:-1800}
RECOVERY_TEMPLATE="$SCRIPT_DIR/../k8s/prole/prole-db-recovery.yaml.tpl"
CNPG_FORCE_ROLLOUT_SCRIPT="$SCRIPT_DIR/init_prole-db.sh"
BARMAN_PLUGIN_MANIFEST_URL=${BARMAN_PLUGIN_MANIFEST_URL:-}
BARMAN_PLUGIN_FALLBACK_VERSION=${BARMAN_PLUGIN_FALLBACK_VERSION:-0.9.0}
CERT_MANAGER_MANIFEST_URL=${CERT_MANAGER_MANIFEST_URL:-}
CERT_MANAGER_FALLBACK_VERSION=${CERT_MANAGER_FALLBACK_VERSION:-1.19.3}

# Support both PROLE_HOME/k8s and sibling k8s directory
if [[ -d "$SCRIPT_DIR/../k8s/prole" ]]; then
  K8S_PROLE_DIR="$SCRIPT_DIR/../k8s/prole"
elif [[ -n "${PROLE_HOME:-}" && -d "$PROLE_HOME/k8s/prole" ]]; then
  K8S_PROLE_DIR="$PROLE_HOME/k8s/prole"
else
  K8S_PROLE_DIR="$SCRIPT_DIR/../k8s/prole"
fi
CNPG_MANIFEST="$K8S_PROLE_DIR/prole-db.yaml"
BARMAN_OBJECTSTORE_MANIFEST="$K8S_PROLE_DIR/prole-db-barman-objectstore.yaml"

SECRETS_DIR="$PROLE_SERVICE/secrets"
# Resolving CNPG admin keys. 
# We prefer names without algorithm suffixes to be more generic, matching install.py fallback strategy.
ADMIN_PRIV_ED25519="$SECRETS_DIR/admin_ed25519.key"
ADMIN_PUB_ED25519="$SECRETS_DIR/admin_ed25519.pub"
ADMIN_PRIV_GENERIC="$SECRETS_DIR/admin.key"
ADMIN_PUB_GENERIC="$SECRETS_DIR/admin.pub"
OPENBAO_TOKEN_FILE="$SECRETS_DIR/openbao-root-token"
BAO_NAMESPACE="${NAMESPACE:-default}"
BAO_PATH_PREFIX="prole/${BAO_NAMESPACE}"
BAO_PATH_ADMIN="${BAO_PATH_PREFIX}/admin"
BAO_PATH_DB="${BAO_PATH_PREFIX}/db"
BAO_PATH_MONITORING="${BAO_PATH_PREFIX}/monitoring"

ensure_tools() {
  for t in kubectl curl openssl base64 jq; do
    command -v "$t" >/dev/null || { echo "Missing required tool: $t" >&2; exit 1; }
  done
}

ensure_namespace() {
  if [[ -z "${NAMESPACE:-}" ]]; then
    echo "ERROR: NAMESPACE is empty. Check env.sh or conf/prole.cfg." >&2
    exit 1
  fi
  if ! kubectl get namespace "$NAMESPACE" >/dev/null 2>&1; then
    echo "Creating namespace '$NAMESPACE' ..."
    kubectl create namespace "$NAMESPACE" >/dev/null 2>&1 || true
  fi
}

openbao_url() {
  if [[ -n "${PROLE_OPENBAO_URL:-}" ]]; then
    echo "$PROLE_OPENBAO_URL"
  elif curl -sS "http://127.0.0.1:18200/v1/sys/health" >/dev/null 2>&1; then
    echo "http://127.0.0.1:18200"
  else
    echo "http://openbao.${NAMESPACE}.svc.cluster.local:8200"
  fi
}

openbao_token() {
  if [[ -f "$OPENBAO_TOKEN_FILE" ]]; then
    cat "$OPENBAO_TOKEN_FILE"
  else
    echo "${OPENBAO_ROOT_TOKEN:-}"
  fi
}

fetch_openbao_secret() {
  local path="$1"
  local key="$2"
  local token url
  token=$(openbao_token)
  url=$(openbao_url)
  if [[ -z "$token" ]]; then
    echo ""
    return 0
  fi
  curl -sS -H "X-Vault-Token: $token" "$url/v1/kv/data/$path" | jq -r ".data.data.\"$key\"" || echo ""
}

resolve_db_password() {
  local db_pw="${DB_PASSWORD:-}"
  if [[ -z "$db_pw" || "$db_pw" == '${OPENBAO:'* || "$db_pw" == '${PROLE_SECRET:'* ]]; then
    local fetched_db
    fetched_db=$(fetch_openbao_secret "$BAO_PATH_DB" "password")
    if [[ -n "$fetched_db" && "$fetched_db" != "null" ]]; then
      db_pw="$fetched_db"
    fi
  fi
  printf '%s' "$db_pw"
}

ensure_grafana_admin_secret() {
  local db_pw
  db_pw=$(resolve_db_password)
  if [[ -z "$db_pw" ]]; then
    echo "ERROR: DB_PASSWORD unavailable; cannot create Grafana admin secret." >&2
    return 1
  fi
  kubectl create secret generic grafana-admin \
    -n "$NAMESPACE" \
    --from-literal=admin-password="$db_pw" \
    --dry-run=client -o yaml | kubectl apply -f - >/dev/null

  local token url
  token=$(openbao_token)
  url=$(openbao_url)
  if [[ -n "$token" ]]; then
    curl -sS -H "X-Vault-Token: $token" -H 'Content-Type: application/json' \
      -X POST "$url/v1/kv/data/$BAO_PATH_MONITORING" \
      -d "{\"data\":{\"grafana_admin_password\":\"$db_pw\"}}" >/dev/null || true
  fi
}

ensure_cnpg_operator() {
  if kubectl get deployment -n cnpg-system cnpg-controller-manager >/dev/null 2>&1; then
    kubectl -n cnpg-system rollout status deploy/cnpg-controller-manager --timeout=180s || true
    wait_for_cnpg_webhook 180 || true
    return 0
  fi

  local latest_version minor_version yaml_url
  latest_version=$(get_latest_cnpg_version)
  minor_version=$(echo "$latest_version" | cut -d. -f1,2)
  yaml_url="https://raw.githubusercontent.com/cloudnative-pg/cloudnative-pg/release-${minor_version}/releases/cnpg-${latest_version}.yaml"

  echo "Installing CloudNative-PG operator version ${latest_version} ..."
  kubectl apply --server-side -f "$yaml_url"

  if kubectl get deployment -n cnpg-system cnpg-controller-manager >/dev/null 2>&1; then
    kubectl -n cnpg-system rollout status deploy/cnpg-controller-manager --timeout=180s || true
    wait_for_cnpg_webhook 180 || true
  fi
}

get_latest_barman_plugin_version() {
  local version tag
  tag=$(curl -s "https://api.github.com/repos/cloudnative-pg/plugin-barman-cloud/releases/latest" | jq -r '.tag_name' || echo "")
  if [[ -z "$tag" || "$tag" == "null" ]]; then
    echo "v${BARMAN_PLUGIN_FALLBACK_VERSION}"
    return 0
  fi
  echo "$tag"
}

resolve_barman_plugin_manifest_url() {
  if [[ -n "$BARMAN_PLUGIN_MANIFEST_URL" ]]; then
    echo "$BARMAN_PLUGIN_MANIFEST_URL"
    return 0
  fi
  local tag
  tag=$(get_latest_barman_plugin_version)
  echo "https://github.com/cloudnative-pg/plugin-barman-cloud/releases/download/${tag}/manifest.yaml"
}

cert_manager_ready() {
  kubectl get crd certificates.cert-manager.io >/dev/null 2>&1
}

get_latest_cert_manager_version() {
  local tag
  tag=$(curl -s "https://api.github.com/repos/cert-manager/cert-manager/releases/latest" | jq -r '.tag_name' || echo "")
  if [[ -z "$tag" || "$tag" == "null" ]]; then
    echo "v${CERT_MANAGER_FALLBACK_VERSION}"
    return 0
  fi
  echo "$tag"
}

resolve_cert_manager_manifest_url() {
  if [[ -n "$CERT_MANAGER_MANIFEST_URL" ]]; then
    echo "$CERT_MANAGER_MANIFEST_URL"
    return 0
  fi
  local tag
  tag=$(get_latest_cert_manager_version)
  echo "https://github.com/cert-manager/cert-manager/releases/download/${tag}/cert-manager.yaml"
}

ensure_cert_manager() {
  if cert_manager_ready; then
    if kubectl -n cert-manager get deploy cert-manager >/dev/null 2>&1; then
      kubectl -n cert-manager rollout status deploy/cert-manager --timeout=180s || true
      kubectl -n cert-manager rollout status deploy/cert-manager-webhook --timeout=180s || true
      kubectl -n cert-manager rollout status deploy/cert-manager-cainjector --timeout=180s || true
    fi
    return 0
  fi

  local cm_url
  cm_url=$(resolve_cert_manager_manifest_url)
  echo "Installing cert-manager from ${cm_url} ..."
  kubectl apply -f "$cm_url"

  if kubectl -n cert-manager get deploy cert-manager >/dev/null 2>&1; then
    kubectl -n cert-manager rollout status deploy/cert-manager --timeout=180s || true
    kubectl -n cert-manager rollout status deploy/cert-manager-webhook --timeout=180s || true
    kubectl -n cert-manager rollout status deploy/cert-manager-cainjector --timeout=180s || true
  fi
}

wait_for_barman_crd() {
  local timeout=${1:-120}
  local start_time
  start_time=$(date +%s)
  while true; do
    if kubectl get crd objectstores.barmancloud.cnpg.io >/dev/null 2>&1; then
      return 0
    fi
    if (( $(date +%s) - start_time > timeout )); then
      return 1
    fi
    sleep 5
  done
}

ensure_barman_plugin() {
  local crd_present deploy_present
  crd_present=false
  deploy_present=false

  if kubectl get crd objectstores.barmancloud.cnpg.io >/dev/null 2>&1; then
    crd_present=true
  fi
  if kubectl -n cnpg-system get deploy barman-cloud >/dev/null 2>&1; then
    deploy_present=true
  fi

  if [[ "$crd_present" == "true" && "$deploy_present" == "true" ]]; then
    kubectl -n cnpg-system rollout status deploy/barman-cloud --timeout=180s || true
    return 0
  fi

  ensure_cert_manager

  local plugin_url
  plugin_url=$(resolve_barman_plugin_manifest_url)
  echo "Installing Barman Cloud plugin from ${plugin_url} ..."
  kubectl apply -f "$plugin_url"

  if ! wait_for_barman_crd 120; then
    echo "WARN: Barman Cloud ObjectStore CRD not ready after install." >&2
  fi

  if kubectl -n cnpg-system get deploy barman-cloud >/dev/null 2>&1; then
    kubectl -n cnpg-system rollout status deploy/barman-cloud --timeout=180s || true
  fi
}

wait_for_cnpg_webhook() {
  local timeout=${1:-120}
  local start_time
  start_time=$(date +%s)

  echo "Waiting for CNPG webhook service endpoints to be ready..."
  while true; do
    local endpoints
    endpoints=$(kubectl -n cnpg-system get endpoints cnpg-webhook-service -o jsonpath='{.subsets[*].addresses[*].ip}' 2>/dev/null || true)
    if [[ -n "$endpoints" ]]; then
      echo "CNPG webhook service has endpoints."
      return 0
    fi
    if (( $(date +%s) - start_time > timeout )); then
      echo "WARN: CNPG webhook endpoints not ready after ${timeout}s."
      return 1
    fi
    sleep 5
  done
}

apply_barman_objectstore_if_present() {
  if [[ ! -f "$BARMAN_OBJECTSTORE_MANIFEST" ]]; then
    return 0
  fi
  if kubectl get crd objectstores.barmancloud.cnpg.io >/dev/null 2>&1; then
    kubectl apply -n "$NAMESPACE" -f "$BARMAN_OBJECTSTORE_MANIFEST"
  else
    echo "WARN: Barman Cloud ObjectStore CRD not found; skipping $BARMAN_OBJECTSTORE_MANIFEST."
  fi
}

ensure_prole_stack_resources() {
  echo "Applying CloudNative-PG cluster and related resources ..."
  ensure_grafana_admin_secret
  if [[ -n "$CNPG_MANIFEST_OVERRIDE" ]]; then
    if [[ ! -f "$CNPG_MANIFEST_OVERRIDE" ]]; then
      echo "ERROR: CNPG_MANIFEST_OVERRIDE not found: $CNPG_MANIFEST_OVERRIDE" >&2
      return 1
    fi
    local dir file
    dir="$K8S_PROLE_DIR"
    for file in "$dir"/*.yaml; do
      case "$(basename "$file")" in
        prole-db.yaml|kustomization.yaml|supabase-*.yaml|prole-db-barman-objectstore.yaml)
          continue
          ;;
      esac
      kubectl apply -n "$NAMESPACE" -f "$file"
    done
    apply_barman_objectstore_if_present
    apply_cnpg_cluster_manifest "$CNPG_MANIFEST_OVERRIDE"
  else
    local dir file
    dir="$K8S_PROLE_DIR"
    for file in "$dir"/*.yaml; do
      case "$(basename "$file")" in
        prole-db.yaml|kustomization.yaml|supabase-*.yaml|prole-db-barman-objectstore.yaml)
          continue
          ;;
      esac
      kubectl apply -n "$NAMESPACE" -f "$file"
    done
    apply_barman_objectstore_if_present
    apply_cnpg_cluster_manifest "$CNPG_MANIFEST"
  fi

  # Ensure prole-index-html exists for prole deployment readiness probe
  if ! kubectl get configmap prole-index-html -n "$NAMESPACE" >/dev/null 2>&1; then
    echo "Creating prole-index-html configmap..."
    printf "<html><body><h1>Prole</h1></body></html>" > /tmp/index.html
    kubectl create configmap prole-index-html --from-file=/tmp/index.html -n "$NAMESPACE"
    rm /tmp/index.html
  fi

  # Ensure prole-nginx-tls exists (self-signed for dev)
  if ! kubectl get secret prole-nginx-tls -n "$NAMESPACE" >/dev/null 2>&1; then
    echo "Generating self-signed prole-nginx-tls for development..."
    openssl req -x509 -nodes -days 365 -newkey rsa:2048 \
      -keyout /tmp/nginx-tls.key -out /tmp/nginx-tls.crt \
      -subj "/CN=prole.org" >/dev/null 2>&1
    kubectl create secret tls prole-nginx-tls --key /tmp/nginx-tls.key --cert /tmp/nginx-tls.crt -n "$NAMESPACE"
    rm /tmp/nginx-tls.key /tmp/nginx-tls.crt
  fi
}

apply_cnpg_cluster_manifest() {
  local manifest="$1"
  local attempts=${CNPG_APPLY_RETRIES:-6}
  local i out

  for ((i=1; i<=attempts; i++)); do
    if out=$(kubectl apply -n "$NAMESPACE" -f "$manifest" 2>&1); then
      printf '%s\n' "$out"
      return 0
    fi
    if echo "$out" | grep -q "cnpg-webhook-service"; then
      echo "CNPG webhook not ready yet (attempt $i/$attempts). Retrying..."
      sleep 5
      continue
    fi
    echo "$out" >&2
    return 1
  done

  echo "ERROR: Failed to apply CNPG manifest after $attempts attempts." >&2
  echo "$out" >&2
  return 1
}

wait_for_cnpg_pods() {
  local timeout=${1:-300}
  local start_time
  start_time=$(date +%s)

  local target_pods="${CNPG_TARGET_PODS:-}"
  if [[ -z "$target_pods" ]]; then
    target_pods=$(kubectl -n "$NAMESPACE" get cluster "$CNPG_CLUSTER_NAME" -o jsonpath='{.spec.instances}' 2>/dev/null || true)
  fi
  if [[ -z "$target_pods" ]]; then
    target_pods=3
  fi

  echo "Waiting for $target_pods CNPG pods for cluster '$CNPG_CLUSTER_NAME' in namespace '$NAMESPACE' to be Running..."
  while true; do
    local pods
    pods=$(kubectl -n "$NAMESPACE" get pods -l "cnpg.io/cluster=$CNPG_CLUSTER_NAME" --no-headers 2>/dev/null || true)

    if [[ -n "$pods" ]]; then
      # Check for Error or CrashLoopBackOff
      if echo "$pods" | grep -E "Error|CrashLoopBackOff" >/dev/null; then
        echo "ERROR: Some CNPG pods are in Error or CrashLoopBackOff state:" >&2
        echo "$pods" | grep -E "Error|CrashLoopBackOff" >&2
        return 1
      fi

      # Count Running pods by name (exclude initdb)
      local running_pods
      running_pods=$(kubectl -n "$NAMESPACE" get pods --no-headers 2>/dev/null \
        | grep "^${CNPG_CLUSTER_NAME}-" \
        | grep -v "initdb" \
        | grep "Running" \
        | wc -l | xargs)

      if [[ "$running_pods" -ge "$target_pods" ]]; then
        echo "All $running_pods/$target_pods pods are Running."
        return 0
      fi
    fi

    if (( $(date +%s) - start_time > timeout )); then
      echo "ERROR: Timed out waiting for $target_pods CNPG pods for cluster '$CNPG_CLUSTER_NAME' in namespace '$NAMESPACE'." >&2
      return 1
    fi
    sleep 5
  done
}

cluster_exists() {
  kubectl -n "$NAMESPACE" get cluster "$CNPG_CLUSTER_NAME" >/dev/null 2>&1
}

cluster_has_pods() {
  kubectl -n "$NAMESPACE" get pods -l "cnpg.io/cluster=$CNPG_CLUSTER_NAME" --no-headers 2>/dev/null | grep -q .
}

latest_backup_name() {
  kubectl -n "$NAMESPACE" get backup \
    --sort-by=.metadata.creationTimestamp \
    -o jsonpath='{range .items[*]}{.metadata.name}{"\n"}{end}' 2>/dev/null | tail -n 1
}

latest_completed_backup_name() {
  kubectl -n "$NAMESPACE" get backup \
    --sort-by=.metadata.creationTimestamp \
    -o jsonpath='{range .items[*]}{.metadata.name}{"|"}{.status.phase}{"\n"}{end}' 2>/dev/null | \
    awk -F'|' '{p=tolower($2); if (p=="completed" || p=="succeeded") {name=$1}} END {print name}'
}

wait_for_backup() {
  local backup_name="$1"
  local start_time now phase phase_lc
  start_time=$(date +%s)

  while true; do
    phase=$(kubectl -n "$NAMESPACE" get backup "$backup_name" -o jsonpath='{.status.phase}' 2>/dev/null || true)
    phase_lc=$(printf '%s' "$phase" | tr '[:upper:]' '[:lower:]')

    case "$phase_lc" in
      completed|succeeded)
        echo "Backup $backup_name completed."
        return 0
        ;;
      failed|error)
        echo "Backup $backup_name failed (phase=$phase)." >&2
        return 1
        ;;
    esac

    now=$(date +%s)
    if (( now - start_time > BACKUP_WAIT_TIMEOUT )); then
      echo "Timed out waiting for backup $backup_name." >&2
      return 1
    fi

    echo "Waiting for backup $backup_name to complete (phase=${phase:-unknown}) ..."
    sleep 10
  done
}

run_garage_backup() {
  if [[ ! -x "$SCRIPT_DIR/init_prole-db-backup.sh" ]]; then
    echo "WARN: init_prole-db-backup.sh not found; skipping Garage backup." >&2
    return 1
  fi

  echo "Running Garage backup via init_prole-db-backup.sh ..."
  if ! "$SCRIPT_DIR/init_prole-db-backup.sh" start; then
    echo "Garage backup script failed." >&2
    return 1
  fi

  sleep 2
  local backup_name
  backup_name=$(latest_backup_name)
  if [[ -z "$backup_name" ]]; then
    echo "No backup resource detected after triggering backup." >&2
    return 1
  fi

  wait_for_backup "$backup_name"
}

get_primary_pod() {
  local primary
  primary=$(kubectl -n "$NAMESPACE" get cluster "$CNPG_CLUSTER_NAME" -o jsonpath='{.status.currentPrimary}' 2>/dev/null || true)
  if [[ -z "$primary" ]]; then
    primary=$(kubectl -n "$NAMESPACE" get pods -l "cnpg.io/cluster=$CNPG_CLUSTER_NAME" -o jsonpath='{.items[0].metadata.name}' 2>/dev/null || true)
  fi
  printf '%s' "$primary"
}

decode_b64() {
  local data="$1"
  if [[ -z "$data" ]]; then
    return 1
  fi
  printf '%s' "$data" | base64 -d 2>/dev/null
}

resolve_db_credentials() {
  local user_b64 pass_b64 user pass

  user_b64=$(kubectl -n "$NAMESPACE" get secret prole-db-user -o jsonpath='{.data.username}' 2>/dev/null || true)
  pass_b64=$(kubectl -n "$NAMESPACE" get secret prole-db-user -o jsonpath='{.data.password}' 2>/dev/null || true)
  user=$(decode_b64 "$user_b64" || true)
  pass=$(decode_b64 "$pass_b64" || true)

  if [[ -z "$user" || -z "$pass" ]]; then
    user_b64=$(kubectl -n "$NAMESPACE" get secret prole-db-superuser -o jsonpath='{.data.username}' 2>/dev/null || true)
    pass_b64=$(kubectl -n "$NAMESPACE" get secret prole-db-superuser -o jsonpath='{.data.password}' 2>/dev/null || true)
    user=$(decode_b64 "$user_b64" || true)
    pass=$(decode_b64 "$pass_b64" || true)
  fi

  if [[ -z "$user" || -z "$pass" ]]; then
    return 1
  fi

  printf '%s\n%s' "$user" "$pass"
}

pgdump_local() {
  local pod user pass db_name dump_dir dump_file timestamp
  pod=$(get_primary_pod)
  if [[ -z "$pod" ]]; then
    echo "ERROR: No CNPG pod available for pg_dump." >&2
    return 1
  fi

  local creds
  if ! creds=$(resolve_db_credentials); then
    echo "ERROR: Unable to resolve database credentials for pg_dump." >&2
    return 1
  fi
  user=$(printf '%s' "$creds" | sed -n '1p')
  pass=$(printf '%s' "$creds" | sed -n '2p')

  db_name=${PROLE_DB_NAME:-prole-db}
  dump_dir="$BACKUP_DIR"
  mkdir -p "$dump_dir"

  timestamp=$(date +%Y%m%d%H%M%S)
  dump_file="$dump_dir/${CNPG_CLUSTER_NAME}-pgdump-${timestamp}.dump"

  echo "Running pg_dump against pod $pod (db=$db_name) ..."
  if kubectl -n "$NAMESPACE" exec "$pod" -c postgres -- env PGPASSWORD="$pass" \
      pg_dump -U "$user" -d "$db_name" -Fc > "$dump_file"; then
    echo "pg_dump saved to $dump_file"
    return 0
  fi

  echo "pg_dump failed; removing partial file." >&2
  rm -f "$dump_file"
  return 1
}

attempt_backup_if_active() {
  if ! cluster_exists; then
    return 0
  fi

  if ! cluster_has_pods; then
    echo "CNPG cluster '$CNPG_CLUSTER_NAME' exists but no pods detected; skipping backup." >&2
    return 0
  fi

  echo "CNPG cluster '$CNPG_CLUSTER_NAME' detected; attempting Garage backup ..."
  if run_garage_backup; then
    return 0
  fi

  echo "Garage backup failed; attempting local pg_dump ..." >&2
  if pgdump_local; then
    return 0
  fi

  echo "WARN: Both Garage backup and local pg_dump failed." >&2
  return 0
}

force_rollout() {
  if [[ ! -x "$CNPG_FORCE_ROLLOUT_SCRIPT" ]]; then
    echo "WARN: Force rollout script not found at $CNPG_FORCE_ROLLOUT_SCRIPT" >&2
    return 1
  fi

  echo "Attempting force rollout of CNPG pods ..."
  "$CNPG_FORCE_ROLLOUT_SCRIPT" rollout
}

reset_and_reinit() {
  local backup_name tmp_manifest
  backup_name=$(latest_completed_backup_name)

  echo "Resetting CNPG cluster '$CNPG_CLUSTER_NAME' in namespace '$NAMESPACE' ..."
  kubectl -n "$NAMESPACE" delete cluster "$CNPG_CLUSTER_NAME" --ignore-not-found
  kubectl -n "$NAMESPACE" wait --for=delete pod -l "cnpg.io/cluster=$CNPG_CLUSTER_NAME" --timeout=180s >/dev/null 2>&1 || true

  if [[ -n "$backup_name" && -f "$RECOVERY_TEMPLATE" ]]; then
    tmp_manifest=$(mktemp)
    sed "s/{{BACKUP_NAME}}/${backup_name}/g" "$RECOVERY_TEMPLATE" > "$tmp_manifest"
    echo "Re-initializing from backup $backup_name ..."
    CNPG_MANIFEST_OVERRIDE="$tmp_manifest" ensure_prole_stack_resources
    rm -f "$tmp_manifest"
  else
    if [[ -n "$backup_name" && ! -f "$RECOVERY_TEMPLATE" ]]; then
      echo "WARN: Recovery template not found: $RECOVERY_TEMPLATE" >&2
    fi
    if [[ -z "$backup_name" ]]; then
      echo "No completed backups found; starting fresh initialization." >&2
    fi
    ensure_prole_stack_resources
  fi

  wait_for_cnpg_pods 300
}

# Resolve OpenBao URL: prefer explicit env, then localhost port-forward, then cluster DNS
bao_service_url() {
  if [[ -n "${PROLE_OPENBAO_URL:-}" ]]; then
    echo "$PROLE_OPENBAO_URL"
    return 0
  fi
  # Prefer standard local port-forward managed by etc/init_port_forwards.sh
  if curl -sS "http://127.0.0.1:18200/v1/sys/health" >/dev/null 2>&1; then
    echo "http://127.0.0.1:18200"
    return 0
  fi
  echo "http://$OPENBAO_NAME.$NAMESPACE.svc.cluster.local:8200"
}

fetch_admin_keys_and_db_pass_from_bao_or_local() {
  local token url
  if [[ -f "$OPENBAO_TOKEN_FILE" ]]; then
    token=$(cat "$OPENBAO_TOKEN_FILE")
  else
    token=""
  fi
  url=$(bao_service_url)
  if [[ -n "$token" ]]; then
    echo "Attempting to read admin key pair from OpenBao kv/$BAO_PATH_ADMIN ..."
    if curl -sS -H "X-Vault-Token: $token" "$url/v1/kv/data/$BAO_PATH_ADMIN" | jq -e '.data.data' >/dev/null 2>&1; then
      local priv_b64 pub_b64
      priv_b64=$(curl -sS -H "X-Vault-Token: $token" "$url/v1/kv/data/$BAO_PATH_ADMIN" | jq -r '.data.data.admin_private_key_b64')
      pub_b64=$(curl -sS -H "X-Vault-Token: $token" "$url/v1/kv/data/$BAO_PATH_ADMIN" | jq -r '.data.data.admin_public_key_b64')
      # Use a temporary file to determine where to save based on existing legacy or generic preference
      local target_priv="$ADMIN_PRIV_GENERIC"
      local target_pub="$ADMIN_PUB_GENERIC"
      
      # If legacy keys exist, we might want to overwrite them too for compatibility
      printf "%s" "$priv_b64" | base64 -d >"$target_priv"
      printf "%s" "$pub_b64" | base64 -d >"$target_pub"
      chmod 0600 "$target_priv"
      
      # Mirror to legacy path if it was expected by other scripts
      cp "$target_priv" "$ADMIN_PRIV_ED25519" 2>/dev/null || true
      cp "$target_pub" "$ADMIN_PUB_ED25519" 2>/dev/null || true
    fi

    echo "Attempting to read database password from OpenBao kv/$BAO_PATH_DB ..."
    if curl -sS -H "X-Vault-Token: $token" "$url/v1/kv/data/$BAO_PATH_DB" | jq -e '.data.data' >/dev/null 2>&1; then
      local db_pass
      db_pass=$(curl -sS -H "X-Vault-Token: $token" "$url/v1/kv/data/$BAO_PATH_DB" | jq -r '.data.data.password')
      if [[ -n "$db_pass" ]]; then
        echo "Updating database user secret 'prole-db-user' from OpenBao ..."
        kubectl create secret generic prole-db-user -n "$NAMESPACE" \
          --from-literal=username=prole \
          --from-literal=password="$db_pass" \
          --dry-run=client -o yaml | kubectl apply -f -

        echo "Updating database superuser secret 'prole-db-superuser' from OpenBao ..."
        kubectl create secret generic prole-db-superuser -n "$NAMESPACE" \
          --from-literal=username=postgres \
          --from-literal=password="$db_pass" \
          --dry-run=client -o yaml | kubectl apply -f -
      fi
    fi
  fi

  if [[ -f "$ADMIN_PRIV_GENERIC" && -f "$ADMIN_PUB_GENERIC" ]]; then
    echo "Using local admin key pair at $SECRETS_DIR"
    return 0
  fi
  if [[ -f "$ADMIN_PRIV_ED25519" && -f "$ADMIN_PUB_ED25519" ]]; then
    echo "Using local legacy admin key pair at $SECRETS_DIR"
    # Link or copy to generic for consistent use below
    cp "$ADMIN_PRIV_ED25519" "$ADMIN_PRIV_GENERIC"
    cp "$ADMIN_PUB_ED25519" "$ADMIN_PUB_GENERIC"
    return 0
  fi
  echo "ERROR: Could not obtain admin key pair from OpenBao and no local files found." >&2
  exit 1
}

apply_cnpg_admin_secret() {
  echo "Creating/updating Secret cnpg-admin-key ..."
  kubectl create secret generic cnpg-admin-key -n "$NAMESPACE" \
    --from-file=admin.key="$ADMIN_PRIV_GENERIC" \
    --from-file=admin.pub="$ADMIN_PUB_GENERIC" \
    --dry-run=client -o yaml | kubectl apply -f -
}

generate_tls_if_missing() {
  local ca_secret_name="${CNPG_CLUSTER_NAME}-ca"
  if kubectl -n "$NAMESPACE" get secret "$ca_secret_name" >/dev/null 2>&1; then
    echo "CA secret $ca_secret_name already exists; skipping generation."
    return 0
  fi
  echo "Generating self-signed CA (RSA 4096) for CNPG ..."
  local TMPD
  TMPD=$(mktemp -d)
  openssl genrsa -out "$TMPD/ca.key" 4096
  openssl req -x509 -new -key "$TMPD/ca.key" -out "$TMPD/ca.crt" -days 3650 -subj "/CN=Prole CNPG CA"
  kubectl -n "$NAMESPACE" create secret generic "$ca_secret_name" \
    --from-file=ca.crt="$TMPD/ca.crt" \
    --from-file=ca.key="$TMPD/ca.key" \
    --dry-run=client -o yaml | kubectl apply -f -
  rm -rf "$TMPD"
}

# Resolve latest CNPG version from GitHub if possible, fallback to a sensible default.
get_latest_cnpg_version() {
  local version
  version=$(curl -s "https://api.github.com/repos/cloudnative-pg/cloudnative-pg/releases/latest" | jq -r '.tag_name' | sed 's/^v//' || echo "")
  if [[ -z "$version" || "$version" == "null" ]]; then
    echo "1.27.0"
  else
    echo "$version"
  fi
}

initialize() {
  ensure_tools
  ensure_namespace
  attempt_backup_if_active
  ensure_cnpg_operator
  ensure_barman_plugin
  echo "Using namespace: $NAMESPACE"
  
  fetch_admin_keys_and_db_pass_from_bao_or_local
  apply_cnpg_admin_secret

  ensure_prole_stack_resources

  if ! wait_for_cnpg_pods 300; then
    echo "WARN: CNPG pods did not become ready after init; attempting force rollout ..." >&2
    if force_rollout; then
      if ! wait_for_cnpg_pods 300; then
        echo "WARN: Force rollout did not recover CNPG; attempting reset and re-init ..." >&2
        if ! reset_and_reinit; then
          return 1
        fi
      fi
    else
      echo "WARN: Force rollout failed; attempting reset and re-init ..." >&2
      if ! reset_and_reinit; then
        return 1
      fi
    fi
  fi

  # Support both names for the toggle from prole.cfg
  local kerberos_enabled="${KERBEROS_ENABLED:-${ENABLED:-false}}"
  if [[ "$kerberos_enabled" == "true" || "$kerberos_enabled" == "True" || "$kerberos_enabled" == "1" ]]; then
    if [[ -x "$SCRIPT_DIR/init_kerberos.sh" ]]; then
      echo "Configuring Kerberos for CNPG pods ..."
      if ! "$SCRIPT_DIR/init_kerberos.sh" initialize; then
        echo "WARN: Kerberos initialization did not complete successfully."
      fi
    else
      echo "WARN: init_kerberos.sh not found; skipping Kerberos configuration."
    fi
  else
    echo "Kerberos is disabled; skipping Kerberos configuration."
  fi

  # Ensure port-forward is running for Postgres (local access)
  echo "Ensuring port-forward for Postgres is active ..."
  "$SCRIPT_DIR/init_port_forwards.sh" stop postgres || true
  "$SCRIPT_DIR/init_port_forwards.sh" start postgres &
  sleep 2

  echo "Initialization complete for CNPG + Kerberos + cert artifacts."
}

update_reload() {
  initialize
}

case "$ACTION" in
  recreate)
    ensure_tools
    "$0" delete "$CNPG_CLUSTER_NAME"
    "$0" create "$CNPG_CLUSTER_NAME"
    ;;
  create)
    ensure_tools
    ensure_namespace
    initialize
    ;;
  delete)
    ensure_tools
    echo "Deleting all resources for '$CNPG_CLUSTER_NAME' ..."
    kubectl delete -n "$NAMESPACE" -k "$SCRIPT_DIR/../k8s/prole" --ignore-not-found
    ;;
  start)
    ensure_tools
    ensure_namespace
    ensure_cnpg_operator
    ensure_barman_plugin
    if [[ ! -f "$CNPG_MANIFEST" ]]; then
      echo "ERROR: CNPG manifest not found at $CNPG_MANIFEST" >&2
      exit 1
    fi
    echo "Starting CloudNative-PG cluster from $CNPG_MANIFEST in namespace $NAMESPACE..."
    kubectl apply -n "$NAMESPACE" -f "$CNPG_MANIFEST"
    ;;
  stop)
    ensure_tools
    if [[ ! -f "$CNPG_MANIFEST" ]]; then
      echo "ERROR: CNPG manifest not found at $CNPG_MANIFEST" >&2
      exit 1
    fi
    echo "Stopping CloudNative-PG cluster using $CNPG_MANIFEST ..."
    kubectl delete -f "$CNPG_MANIFEST" --ignore-not-found
    ;;
  status)
    ensure_tools
    echo "--- CloudNative-PG Cluster Status ($CNPG_CLUSTER_NAME) ---"
    if kubectl -n "$NAMESPACE" get cluster "$CNPG_CLUSTER_NAME" >/dev/null 2>&1; then
      kubectl -n "$NAMESPACE" get cluster "$CNPG_CLUSTER_NAME"
      echo ""
      echo "CNPG Plugin Status:"
      if kubectl cnpg version >/dev/null 2>&1; then
        kubectl cnpg status "$CNPG_CLUSTER_NAME" -n "$NAMESPACE"
      else
        echo "Note: 'kubectl cnpg' plugin not found; skipping detailed status."
      fi
    else
      echo "Cluster '$CNPG_CLUSTER_NAME' not found in namespace '$NAMESPACE'."
    fi
    ;;
  restart)
    ensure_tools
    "$0" stop
    "$0" start
    ;;
  initialize)
    if ! initialize; then
      exit 1
    fi
    ;;
  update|reload)
    if ! update_reload; then
      exit 1
    fi
    ;;
  install-barman-plugin)
    ensure_tools
    ensure_cnpg_operator
    ensure_barman_plugin
    ;;
  *)
    echo "Usage: $0 {create|delete|recreate|start|stop|status|restart|initialize|update|reload|install-barman-plugin} [dbname]" >&2
    exit 2
    ;;
esac