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

REPO_URL="https://git.jeannerot.fr/christophe/chesscubing.git"
REPO_BRANCH="${CHESSCUBING_GIT_BRANCH:-main}"

usage() {
  cat <<'EOF'
Bootstrap d'installation ChessCubing pour Proxmox.

Usage local :
  ./install-chesscubing-proxmox.sh

Usage en une ligne :
  bash -c "$(curl -fsSL https://git.jeannerot.fr/christophe/chesscubing/raw/branch/main/install-chesscubing-proxmox.sh)"

Variables d'environnement reconnues :
  CHESSCUBING_PROXMOX_HOST
  CHESSCUBING_PROXMOX_USER
  CHESSCUBING_PROXMOX_PASSWORD
  CHESSCUBING_SSH_PORT
  CHESSCUBING_CTID
  CHESSCUBING_LXC_HOSTNAME
  CHESSCUBING_LXC_IP
  CHESSCUBING_LXC_GATEWAY
  CHESSCUBING_LXC_BRIDGE
  CHESSCUBING_LXC_CORES
  CHESSCUBING_LXC_MEMORY
  CHESSCUBING_LXC_SWAP
  CHESSCUBING_LXC_DISK_GB
  CHESSCUBING_TEMPLATE_STORAGE
  CHESSCUBING_ROOTFS_STORAGE
  CHESSCUBING_LXC_PASSWORD
  CHESSCUBING_GIT_BRANCH
EOF
}

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

have_cmd() {
  command -v "$1" >/dev/null 2>&1
}

install_pkg_if_missing() {
  local missing=()
  local pkg=""

  for pkg in "$@"; do
    if ! have_cmd "$pkg"; then
      missing+=("$pkg")
    fi
  done

  if [[ ${#missing[@]} -eq 0 ]]; then
    return 0
  fi

  if ! have_cmd apt-get; then
    die "Commandes manquantes: ${missing[*]}. Installe-les manuellement."
  fi

  printf 'Installation des dépendances manquantes: %s\n' "${missing[*]}"
  if have_cmd sudo && [[ "${EUID}" -ne 0 ]]; then
    sudo apt-get update
    sudo apt-get install -y git sshpass openssh-client ca-certificates
  elif [[ "${EUID}" -eq 0 ]]; then
    apt-get update
    apt-get install -y git sshpass openssh-client ca-certificates
  else
    die "git/sshpass manquent et sudo n'est pas disponible."
  fi
}

prompt_default() {
  local var_name="$1"
  local prompt_label="$2"
  local default_value="${3:-}"
  local current_value="${!var_name:-}"
  local input=""

  if [[ -n "$current_value" ]]; then
    return 0
  fi

  if [[ -n "$default_value" ]]; then
    read -r -p "$prompt_label [$default_value]: " input
    printf -v "$var_name" '%s' "${input:-$default_value}"
  else
    read -r -p "$prompt_label: " input
    printf -v "$var_name" '%s' "$input"
  fi
}

prompt_secret() {
  local var_name="$1"
  local prompt_label="$2"
  local current_value="${!var_name:-}"

  if [[ -n "$current_value" ]]; then
    return 0
  fi

  read -rsp "$prompt_label: " current_value
  echo
  printf -v "$var_name" '%s' "$current_value"
}

if [[ "${1:-}" == "--help" || "${1:-}" == "-h" ]]; then
  usage
  exit 0
fi

install_pkg_if_missing git ssh sshpass

PROXMOX_HOST="${CHESSCUBING_PROXMOX_HOST:-}"
PROXMOX_USER="${CHESSCUBING_PROXMOX_USER:-}"
PROXMOX_PASSWORD="${CHESSCUBING_PROXMOX_PASSWORD:-}"
SSH_PORT="${CHESSCUBING_SSH_PORT:-22}"
CTID="${CHESSCUBING_CTID:-}"
LXC_HOSTNAME="${CHESSCUBING_LXC_HOSTNAME:-chesscubing-web}"
LXC_IP="${CHESSCUBING_LXC_IP:-dhcp}"
LXC_GATEWAY="${CHESSCUBING_LXC_GATEWAY:-}"
LXC_BRIDGE="${CHESSCUBING_LXC_BRIDGE:-vmbr0}"
LXC_CORES="${CHESSCUBING_LXC_CORES:-2}"
LXC_MEMORY="${CHESSCUBING_LXC_MEMORY:-1024}"
LXC_SWAP="${CHESSCUBING_LXC_SWAP:-512}"
LXC_DISK_GB="${CHESSCUBING_LXC_DISK_GB:-6}"
TEMPLATE_STORAGE="${CHESSCUBING_TEMPLATE_STORAGE:-}"
ROOTFS_STORAGE="${CHESSCUBING_ROOTFS_STORAGE:-}"
LXC_PASSWORD="${CHESSCUBING_LXC_PASSWORD:-}"

default_host=""
if have_cmd pct && have_cmd pveam; then
  default_host="127.0.0.1"
fi

prompt_default PROXMOX_HOST "IP ou nom du serveur Proxmox" "$default_host"
prompt_default PROXMOX_USER "Utilisateur SSH Proxmox" "root@pam"
prompt_secret PROXMOX_PASSWORD "Mot de passe SSH Proxmox"
prompt_default SSH_PORT "Port SSH Proxmox" "22"
prompt_default CTID "CTID Proxmox (laisser vide pour auto)" ""
prompt_default LXC_HOSTNAME "Nom du LXC" "chesscubing-web"
prompt_default LXC_IP "IP du LXC ou dhcp" "dhcp"
if [[ "$LXC_IP" != "dhcp" ]]; then
  prompt_default LXC_GATEWAY "Passerelle du LXC" ""
fi
prompt_default LXC_BRIDGE "Bridge réseau Proxmox" "vmbr0"

[[ -n "$PROXMOX_HOST" ]] || die "Le serveur Proxmox est obligatoire."
[[ -n "$PROXMOX_USER" ]] || die "L'utilisateur Proxmox est obligatoire."
[[ -n "$PROXMOX_PASSWORD" ]] || die "Le mot de passe Proxmox est obligatoire."

TMP_DIR="$(mktemp -d)"
cleanup() {
  rm -rf "$TMP_DIR"
}
trap cleanup EXIT

printf 'Clonage temporaire du dépôt ChessCubing...\n'
git clone --depth 1 --branch "$REPO_BRANCH" "$REPO_URL" "$TMP_DIR/repo" >/dev/null 2>&1

cmd=(
  "$TMP_DIR/repo/scripts/install-proxmox-lxc.sh"
  --proxmox-host "$PROXMOX_HOST"
  --proxmox-user "$PROXMOX_USER"
  --proxmox-password "$PROXMOX_PASSWORD"
  --ssh-port "$SSH_PORT"
  --hostname "$LXC_HOSTNAME"
  --lxc-ip "$LXC_IP"
  --bridge "$LXC_BRIDGE"
  --cores "$LXC_CORES"
  --memory "$LXC_MEMORY"
  --swap "$LXC_SWAP"
  --disk-gb "$LXC_DISK_GB"
  --branch "$REPO_BRANCH"
)

if [[ -n "$CTID" ]]; then
  cmd+=(--ctid "$CTID")
fi

if [[ -n "$LXC_GATEWAY" ]]; then
  cmd+=(--gateway "$LXC_GATEWAY")
fi

if [[ -n "$TEMPLATE_STORAGE" ]]; then
  cmd+=(--template-storage "$TEMPLATE_STORAGE")
fi

if [[ -n "$ROOTFS_STORAGE" ]]; then
  cmd+=(--rootfs-storage "$ROOTFS_STORAGE")
fi

if [[ -n "$LXC_PASSWORD" ]]; then
  cmd+=(--lxc-password "$LXC_PASSWORD")
fi

printf 'Lancement de l’installation LXC ChessCubing...\n'
"${cmd[@]}"