#!/usr/bin/env bash
set -euo pipefail

usage() {
  cat <<'EOF'
Usage:
  ./scripts/update-proxmox-lxc.sh \
    --proxmox-host 192.168.1.10 \
    --proxmox-user root@pam \
    --proxmox-password 'motdepasse' \
    --ctid 120

Options principales:
  --proxmox-host        IP ou nom DNS du serveur Proxmox
  --proxmox-user        Utilisateur SSH Proxmox (defaut: root@pam)
  --proxmox-password    Mot de passe SSH Proxmox
  --ssh-port            Port SSH Proxmox (defaut: 22)
  --ctid                CTID du LXC a mettre a jour
  --hostname            Nom du LXC si le CTID n'est pas fourni (defaut: chesscubing-web)
  --branch              Branche Git a deployer (defaut: main)
  -h, --help            Affiche cette aide
EOF
}

die() {
  printf 'Erreur: %s\n' "$*" >&2
  exit 1
}

need_cmd() {
  command -v "$1" >/dev/null 2>&1 || die "La commande '$1' est requise."
}

PROXMOX_HOST=""
PROXMOX_USER="root@pam"
PROXMOX_PASSWORD="${PROXMOX_PASSWORD:-}"
PROXMOX_PORT="22"

CTID=""
LXC_HOSTNAME="chesscubing-web"
REPO_BRANCH="main"

while [[ $# -gt 0 ]]; do
  case "$1" in
    --proxmox-host)
      PROXMOX_HOST="${2:-}"
      shift 2
      ;;
    --proxmox-user)
      PROXMOX_USER="${2:-}"
      shift 2
      ;;
    --proxmox-password)
      PROXMOX_PASSWORD="${2:-}"
      shift 2
      ;;
    --ssh-port)
      PROXMOX_PORT="${2:-}"
      shift 2
      ;;
    --ctid)
      CTID="${2:-}"
      shift 2
      ;;
    --hostname)
      LXC_HOSTNAME="${2:-}"
      shift 2
      ;;
    --branch)
      REPO_BRANCH="${2:-}"
      shift 2
      ;;
    -h | --help)
      usage
      exit 0
      ;;
    *)
      die "Option inconnue: $1"
      ;;
  esac
done

[[ -n "$PROXMOX_HOST" ]] || die "Merci de fournir --proxmox-host."
[[ -n "$PROXMOX_USER" ]] || die "Merci de fournir --proxmox-user."

if [[ -z "$PROXMOX_PASSWORD" ]]; then
  read -rsp "Mot de passe SSH pour ${PROXMOX_USER}@${PROXMOX_HOST}: " PROXMOX_PASSWORD
  echo
fi

need_cmd ssh
need_cmd sshpass

printf 'Mise a jour du LXC ChessCubing sur %s...\n' "$PROXMOX_HOST"

sshpass -p "$PROXMOX_PASSWORD" \
  ssh \
  -p "$PROXMOX_PORT" \
  -o StrictHostKeyChecking=accept-new \
  -o PreferredAuthentications=password \
  -o PubkeyAuthentication=no \
  "$PROXMOX_USER@$PROXMOX_HOST" \
  bash -s -- \
  "$CTID" \
  "$LXC_HOSTNAME" \
  "$REPO_BRANCH" <<'REMOTE'
set -euo pipefail

ctid="$1"
lxc_hostname="$2"
repo_branch="$3"

die() {
  printf 'Erreur: %s\n' "$*" >&2
  exit 1
}

find_ctid_by_hostname() {
  local wanted="$1"
  local candidate=""
  local candidate_hostname=""

  while read -r candidate; do
    [[ -n "$candidate" ]] || continue
    candidate_hostname="$(pct config "$candidate" 2>/dev/null | awk -F ': ' '/^hostname:/ { print $2; exit }')"
    if [[ "$candidate_hostname" == "$wanted" ]]; then
      printf '%s\n' "$candidate"
      return 0
    fi
  done < <(pct list | awk 'NR > 1 { print $1 }')

  return 1
}

command -v pct >/dev/null 2>&1 || die "La commande 'pct' est absente sur Proxmox."

if [[ -z "$ctid" ]]; then
  ctid="$(find_ctid_by_hostname "$lxc_hostname" || true)"
fi

[[ -n "$ctid" ]] || die "Impossible de retrouver le LXC. Passe --ctid ou --hostname."

if ! pct status "$ctid" >/dev/null 2>&1; then
  die "Le conteneur $ctid est introuvable."
fi

detected_hostname="$(pct config "$ctid" 2>/dev/null | awk -F ': ' '/^hostname:/ { print $2; exit }')"
if [[ -n "$detected_hostname" ]]; then
  lxc_hostname="$detected_hostname"
fi

if ! pct status "$ctid" | grep -q "running"; then
  pct start "$ctid"
  sleep 5
fi

pct exec "$ctid" -- test -x /usr/local/bin/update-chesscubing || die "Le script /usr/local/bin/update-chesscubing est absent dans le conteneur."

pct exec "$ctid" -- /usr/local/bin/update-chesscubing "$repo_branch"

container_ip="$(pct exec "$ctid" -- bash -lc "hostname -I | awk '{print \$1}'" 2>/dev/null | tr -d '\r' || true)"

cat <<EOF

Mise a jour terminee.
- CTID: $ctid
- Nom du LXC: $lxc_hostname
- URL probable: http://${container_ip:-<ip_du_lxc>}
EOF
REMOTE