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

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
CONFIG_DIR="${SCRIPT_DIR}/Config"
GLOBAL_ENV_FILE_DEFAULT="${CONFIG_DIR}/global.env"
TARGETS_DIR_DEFAULT="${CONFIG_DIR}/Targets"

GLOBAL_ENV_FILE="${GLOBAL_ENV_FILE:-$GLOBAL_ENV_FILE_DEFAULT}"
TARGETS_DIR="${TARGETS_DIR:-$TARGETS_DIR_DEFAULT}"

TARGET_NAME="${TARGET_NAME:-}"
CLI_TARGET=""
JSON_ONLY="${JSON_ONLY:-no}"

while [[ $# -gt 0 ]]; do
  case "$1" in
    --global-env-file)
      [[ $# -ge 2 ]] || { echo "Argument manquant pour --global-env-file" >&2; exit 1; }
      GLOBAL_ENV_FILE="$2"
      shift 2
      ;;
    --targets-dir)
      [[ $# -ge 2 ]] || { echo "Argument manquant pour --targets-dir" >&2; exit 1; }
      TARGETS_DIR="$2"
      shift 2
      ;;
    --target)
      [[ $# -ge 2 ]] || { echo "Argument manquant pour --target" >&2; exit 1; }
      CLI_TARGET="$2"
      shift 2
      ;;
    --json-only)
      JSON_ONLY="yes"
      shift
      ;;
    *)
      echo "Argument inconnu : $1" >&2
      exit 1
      ;;
  esac
done

json_escape() {
  python3 - <<'PY' "$1"
import json, sys
print(json.dumps(sys.argv[1]))
PY
}

print_stdout() {
  [[ "$JSON_ONLY" == "yes" ]] || echo "$*"
}

log() {
  print_stdout "[$(date '+%Y-%m-%d %H:%M:%S')] $*"
}

fail() {
  local msg="$1"
  if [[ "$JSON_ONLY" == "yes" ]]; then
    printf '{"status":%s,"message":%s}\n' \
      "$(json_escape "error")" \
      "$(json_escape "$msg")"
  else
    echo "ERROR: $msg" >&2
  fi
  exit 1
}

success() {
  local msg="$1"
  if [[ "$JSON_ONLY" == "yes" ]]; then
    printf '{"status":%s,"message":%s}\n' \
      "$(json_escape "success")" \
      "$(json_escape "$msg")"
  else
    log "$msg"
  fi
}

require_cmd() {
  command -v "$1" >/dev/null 2>&1 || fail "commande requise absente : $1"
}

to_bool_yes_no() {
  local v="${1:-}"
  v="${v,,}"
  case "$v" in
    yes|y|oui|o|true|1) echo "yes" ;;
    no|n|non|false|0|"") echo "no" ;;
    *) return 1 ;;
  esac
}

shell_quote() {
  printf "%q" "$1"
}

cleanup() {
  rm -f "${TMP_ENV_FILE:-}"
}
trap cleanup EXIT

copy_file_to_remote_via_ssh() {
  local local_file="$1"
  local remote_final_path="$2"
  local remote_mode="$3"
  local remote_parent
  local remote_tmp

  [[ -f "$local_file" ]] || fail "fichier source introuvable : $local_file"
  [[ -r "$local_file" ]] || fail "fichier source non lisible : $local_file"

  remote_parent="$(dirname "$remote_final_path")"
  remote_tmp="/tmp/bootstrap_copy.$$.$RANDOM.tmp"

  ssh "${SSH_OPTS[@]}" "$REMOTE" "
    set -euo pipefail
    mkdir -p $(shell_quote "$remote_parent")
    test -d $(shell_quote "$remote_parent")
    test -w $(shell_quote "$remote_parent")
  " >/dev/null 2>&1 || fail "dossier distant absent ou non inscriptible : $remote_parent"

  cat "$local_file" | ssh "${SSH_OPTS[@]}" "$REMOTE" "
    set -euo pipefail
    cat > $(shell_quote "$remote_tmp")
  " >/dev/null 2>&1 || fail "échec de copie distante via SSH vers ${remote_tmp}"

  ssh "${SSH_OPTS[@]}" "$REMOTE" "
    set -euo pipefail
    install -m $(shell_quote "$remote_mode") $(shell_quote "$remote_tmp") $(shell_quote "$remote_final_path")
    rm -f $(shell_quote "$remote_tmp")
  " >/dev/null 2>&1 || fail "échec d'installation distante : $remote_final_path"
}

TARGET_NAME="${CLI_TARGET:-${TARGET_NAME:-}}"
[[ -n "$TARGET_NAME" ]] || fail "target manquante"

TARGET_ENV_SOURCE="${TARGETS_DIR}/${TARGET_NAME}.env"

[[ -f "$GLOBAL_ENV_FILE" ]] || fail "fichier global introuvable : $GLOBAL_ENV_FILE"
[[ -f "$TARGET_ENV_SOURCE" ]] || fail "fichier cible introuvable : $TARGET_ENV_SOURCE"

set -a
# shellcheck disable=SC1090
source "$GLOBAL_ENV_FILE"
# shellcheck disable=SC1090
source "$TARGET_ENV_SOURCE"
set +a

BOOTSTRAP_HOST="${TARGET_HOST:-}"
BOOTSTRAP_PORT="${TARGET_PORT:-22}"
BOOTSTRAP_USER="${TARGET_BOOTSTRAP_USER:-}"
BOOTSTRAP_SSH_KEY="${TARGET_BOOTSTRAP_SSH_KEY:-}"

TARGET_REPO_URL="${TARGET_REPO_URL:-${GLOBAL_REPO_URL:-}}"
TARGET_REPO_BRANCH="${TARGET_REPO_BRANCH:-${GLOBAL_REPO_BRANCH:-}}"
TARGET_REPO_DIR="${TARGET_REPO_DIR:-}"
TARGET_ENV_FILE_PATH="${TARGET_ENV_FILE:-}"

TARGET_ENV_NAME_VALUE="${TARGET_ENV_NAME:-}"
TARGET_PGHOST_VALUE="${TARGET_PGHOST:-${GLOBAL_PGHOST:-}}"
TARGET_PGPORT_VALUE="${TARGET_PGPORT:-${GLOBAL_PGPORT:-}}"
TARGET_PGUSER_VALUE="${TARGET_PGUSER:-}"
TARGET_PGPASSWORD_VALUE="${TARGET_PGPASSWORD:-}"
TARGET_DBS_VALUE="${TARGET_DBS:-}"

TARGET_BACKUP_REMOTE_USER_VALUE="${TARGET_BACKUP_REMOTE_USER:-${GLOBAL_BACKUP_REMOTE_USER:-}}"
TARGET_BACKUP_REMOTE_HOST_VALUE="${TARGET_BACKUP_REMOTE_HOST:-${GLOBAL_BACKUP_REMOTE_HOST:-}}"
TARGET_BACKUP_REMOTE_SSH_PORT_VALUE="${TARGET_BACKUP_REMOTE_SSH_PORT:-${GLOBAL_BACKUP_REMOTE_PORT:-22}}"
GLOBAL_BACKUP_REMOTE_BASE_DIR_VALUE="${GLOBAL_BACKUP_REMOTE_BASE_DIR:-}"
TARGET_BACKUP_SUBDIR_VALUE="${TARGET_BACKUP_SUBDIR:-}"
TARGET_BACKUP_LOG_DIR_VALUE="${TARGET_BACKUP_LOG_DIR:-}"

TARGET_BACKUP_SOURCE_SSH_PRIVATE_KEY_VALUE="${TARGET_BACKUP_SOURCE_SSH_PRIVATE_KEY:-${GLOBAL_BACKUP_SSH_PRIVATE_KEY:-}}"
TARGET_BACKUP_SOURCE_SSH_PUBLIC_KEY_VALUE="${TARGET_BACKUP_SOURCE_SSH_PUBLIC_KEY:-${GLOBAL_BACKUP_SSH_PUBLIC_KEY:-}}"
TARGET_BACKUP_KNOWN_HOSTS_STRICT_VALUE="${TARGET_BACKUP_KNOWN_HOSTS_STRICT:-${GLOBAL_BACKUP_KNOWN_HOSTS_STRICT:-yes}}"

TARGET_LOCAL_RESTORE_BASE_DIR_VALUE="${TARGET_LOCAL_RESTORE_BASE_DIR:-${TARGET_REPO_DIR}/restore_tmp}"
TARGET_REMOTE_ROLES_DIR_NAME_VALUE="${TARGET_REMOTE_ROLES_DIR_NAME:-${GLOBAL_REMOTE_ROLES_DIR_NAME:-user}}"
TARGET_SSH_KEY_VALUE="${TARGET_SSH_KEY:-/home/${BOOTSTRAP_USER}/.ssh/id_ed25519_backup_readonly}"
TARGET_AUTO_INSTALL_POSTGRES_VALUE="${TARGET_AUTO_INSTALL_POSTGRES:-${GLOBAL_AUTO_INSTALL_POSTGRES:-yes}}"
TARGET_AUTO_CREATE_PGUSER_VALUE="${TARGET_AUTO_CREATE_PGUSER:-${GLOBAL_AUTO_CREATE_PGUSER:-yes}}"
TARGET_PGUSER_SUPERUSER_VALUE="${TARGET_PGUSER_SUPERUSER:-${GLOBAL_PGUSER_SUPERUSER:-no}}"
TARGET_AUTO_CONFIGURE_SUDOERS_VALUE="${TARGET_AUTO_CONFIGURE_SUDOERS:-${GLOBAL_AUTO_CONFIGURE_SUDOERS:-no}}"
TARGET_EXCLUDED_RESTORE_ROLES_VALUE="${TARGET_EXCLUDED_RESTORE_ROLES:-${GLOBAL_EXCLUDED_RESTORE_ROLES:-postgres}}"

TARGET_RUNTIME_USER_VALUE="${TARGET_RUNTIME_USER:-$BOOTSTRAP_USER}"
TARGET_BOOTSTRAP_ALLOW_PASSWORDLESS_SUDO_VALUE="${TARGET_BOOTSTRAP_ALLOW_PASSWORDLESS_SUDO:-${GLOBAL_BOOTSTRAP_ALLOW_PASSWORDLESS_SUDO:-yes}}"

[[ -n "$BOOTSTRAP_HOST" ]] || fail "TARGET_HOST manquante"
[[ "$BOOTSTRAP_PORT" =~ ^[0-9]+$ ]] || fail "TARGET_PORT invalide"
[[ -n "$BOOTSTRAP_USER" ]] || fail "TARGET_BOOTSTRAP_USER manquante"
[[ -n "$BOOTSTRAP_SSH_KEY" ]] || fail "TARGET_BOOTSTRAP_SSH_KEY manquante"
[[ -f "$BOOTSTRAP_SSH_KEY" ]] || fail "clé bootstrap introuvable : $BOOTSTRAP_SSH_KEY"
[[ -r "$BOOTSTRAP_SSH_KEY" ]] || fail "clé bootstrap non lisible : $BOOTSTRAP_SSH_KEY"

[[ -n "$TARGET_REPO_URL" ]] || fail "GLOBAL_REPO_URL/TARGET_REPO_URL manquant"
[[ -n "$TARGET_REPO_BRANCH" ]] || fail "GLOBAL_REPO_BRANCH/TARGET_REPO_BRANCH manquant"
[[ -n "$TARGET_REPO_DIR" ]] || fail "TARGET_REPO_DIR manquante"
[[ -n "$TARGET_ENV_FILE_PATH" ]] || fail "TARGET_ENV_FILE manquante"

[[ -n "$TARGET_ENV_NAME_VALUE" ]] || fail "TARGET_ENV_NAME manquante"
[[ -n "$TARGET_PGHOST_VALUE" ]] || fail "TARGET_PGHOST/GLOBAL_PGHOST manquant"
[[ -n "$TARGET_PGPORT_VALUE" ]] || fail "TARGET_PGPORT/GLOBAL_PGPORT manquant"
[[ -n "$TARGET_PGUSER_VALUE" ]] || fail "TARGET_PGUSER manquante"
[[ -n "$TARGET_PGPASSWORD_VALUE" ]] || fail "TARGET_PGPASSWORD manquante"
[[ -n "$TARGET_DBS_VALUE" ]] || fail "TARGET_DBS manquante"

[[ -n "$TARGET_BACKUP_REMOTE_USER_VALUE" ]] || fail "GLOBAL_BACKUP_REMOTE_USER/TARGET_BACKUP_REMOTE_USER manquant"
[[ -n "$TARGET_BACKUP_REMOTE_HOST_VALUE" ]] || fail "GLOBAL_BACKUP_REMOTE_HOST/TARGET_BACKUP_REMOTE_HOST manquant"
[[ -n "$GLOBAL_BACKUP_REMOTE_BASE_DIR_VALUE" ]] || fail "GLOBAL_BACKUP_REMOTE_BASE_DIR manquant"
[[ -n "$TARGET_BACKUP_SUBDIR_VALUE" ]] || fail "TARGET_BACKUP_SUBDIR manquante"
[[ -n "$TARGET_BACKUP_LOG_DIR_VALUE" ]] || fail "TARGET_BACKUP_LOG_DIR manquante"
TARGET_BACKUP_REMOTE_DIR_VALUE="${GLOBAL_BACKUP_REMOTE_BASE_DIR_VALUE%/}/${TARGET_BACKUP_SUBDIR_VALUE}"

[[ -n "$TARGET_BACKUP_SOURCE_SSH_PRIVATE_KEY_VALUE" ]] || fail "GLOBAL_BACKUP_SSH_PRIVATE_KEY/TARGET_BACKUP_SOURCE_SSH_PRIVATE_KEY manquant"
[[ -f "$TARGET_BACKUP_SOURCE_SSH_PRIVATE_KEY_VALUE" ]] || fail "clé privée backup introuvable : $TARGET_BACKUP_SOURCE_SSH_PRIVATE_KEY_VALUE"
[[ -r "$TARGET_BACKUP_SOURCE_SSH_PRIVATE_KEY_VALUE" ]] || fail "clé privée backup non lisible : $TARGET_BACKUP_SOURCE_SSH_PRIVATE_KEY_VALUE"

if [[ -n "$TARGET_BACKUP_SOURCE_SSH_PUBLIC_KEY_VALUE" ]]; then
  [[ -f "$TARGET_BACKUP_SOURCE_SSH_PUBLIC_KEY_VALUE" ]] || fail "clé publique backup introuvable : $TARGET_BACKUP_SOURCE_SSH_PUBLIC_KEY_VALUE"
  [[ -r "$TARGET_BACKUP_SOURCE_SSH_PUBLIC_KEY_VALUE" ]] || fail "clé publique backup non lisible : $TARGET_BACKUP_SOURCE_SSH_PUBLIC_KEY_VALUE"
fi

[[ "$TARGET_BACKUP_REMOTE_SSH_PORT_VALUE" =~ ^[0-9]+$ ]] || fail "port backup invalide"
to_bool_yes_no "$TARGET_BACKUP_KNOWN_HOSTS_STRICT_VALUE" >/dev/null || fail "TARGET_BACKUP_KNOWN_HOSTS_STRICT invalide"
to_bool_yes_no "$TARGET_BOOTSTRAP_ALLOW_PASSWORDLESS_SUDO_VALUE" >/dev/null || fail "TARGET_BOOTSTRAP_ALLOW_PASSWORDLESS_SUDO invalide"

ALLOW_PASSWORDLESS_SUDO="$(to_bool_yes_no "$TARGET_BOOTSTRAP_ALLOW_PASSWORDLESS_SUDO_VALUE")"

require_cmd ssh
require_cmd python3

SSH_OPTS=(
  -i "$BOOTSTRAP_SSH_KEY"
  -p "$BOOTSTRAP_PORT"
  -o IdentitiesOnly=yes
  -o BatchMode=yes
  -o StrictHostKeyChecking=accept-new
  -o ConnectTimeout=8
)

REMOTE="${BOOTSTRAP_USER}@${BOOTSTRAP_HOST}"

log "Test de connexion SSH bootstrap vers ${REMOTE}:${BOOTSTRAP_PORT}"
ssh "${SSH_OPTS[@]}" "$REMOTE" "exit 0" >/dev/null 2>&1 \
  || fail "connexion SSH bootstrap impossible vers ${REMOTE}"

REMOTE_SETUP_CMD="
set -euo pipefail

export DEBIAN_FRONTEND=noninteractive

run_root() {
  if [ \"\$(id -u)\" -eq 0 ]; then
    \"\$@\"
    return 0
  fi

  if command -v sudo >/dev/null 2>&1; then
    sudo -n \"\$@\" || {
      echo 'sudo -n indisponible pour le bootstrap' >&2
      exit 1
    }
    return 0
  fi

  echo 'ni root ni sudo disponible pour le bootstrap' >&2
  exit 1
}

if ! command -v apt-get >/dev/null 2>&1; then
  echo 'apt-get absent sur la cible' >&2
  exit 1
fi

run_root apt-get update
run_root apt-get install -y bash git python3 sudo curl openssh-client ca-certificates postgresql-client

mkdir -p $(shell_quote "$(dirname "$TARGET_REPO_DIR")")
mkdir -p $(shell_quote "$(dirname "$TARGET_ENV_FILE_PATH")")
mkdir -p $(shell_quote "$TARGET_BACKUP_LOG_DIR_VALUE")
mkdir -p $(shell_quote "$TARGET_LOCAL_RESTORE_BASE_DIR_VALUE")
mkdir -p $(shell_quote "$(dirname "$TARGET_SSH_KEY_VALUE")")

chmod 700 $(shell_quote "$(dirname "$TARGET_SSH_KEY_VALUE")") || true
touch $(shell_quote "$(dirname "$TARGET_SSH_KEY_VALUE")/known_hosts")
chmod 644 $(shell_quote "$(dirname "$TARGET_SSH_KEY_VALUE")/known_hosts") || true
"

log "Installation du socle minimal sur la cible"
ssh "${SSH_OPTS[@]}" "$REMOTE" "$REMOTE_SETUP_CMD" \
  || fail "échec de préparation système distante"

TMP_ENV_FILE="$(mktemp)"

cat >"$TMP_ENV_FILE" <<EOF
ENV_NAME=$(printf '%s\n' "$TARGET_ENV_NAME_VALUE")
PGHOST=$(printf '%s\n' "$TARGET_PGHOST_VALUE")
PGPORT=$(printf '%s\n' "$TARGET_PGPORT_VALUE")
PGUSER=$(printf '%s\n' "$TARGET_PGUSER_VALUE")
PGPASSWORD=$(printf '%s\n' "$TARGET_PGPASSWORD_VALUE")
DBS=$(printf '%s\n' "$TARGET_DBS_VALUE")

BACKUP_REMOTE_USER=$(printf '%s\n' "$TARGET_BACKUP_REMOTE_USER_VALUE")
BACKUP_REMOTE_HOST=$(printf '%s\n' "$TARGET_BACKUP_REMOTE_HOST_VALUE")
BACKUP_REMOTE_DIR=$(printf '%s\n' "$TARGET_BACKUP_REMOTE_DIR_VALUE")
BACKUP_REMOTE_SSH_PORT=$(printf '%s\n' "$TARGET_BACKUP_REMOTE_SSH_PORT_VALUE")

BACKUP_LOG_DIR=$(printf '%s\n' "$TARGET_BACKUP_LOG_DIR_VALUE")
LOCAL_RESTORE_BASE_DIR=$(printf '%s\n' "$TARGET_LOCAL_RESTORE_BASE_DIR_VALUE")
REMOTE_ROLES_DIR_NAME=$(printf '%s\n' "$TARGET_REMOTE_ROLES_DIR_NAME_VALUE")
SSH_KEY=$(printf '%s\n' "$TARGET_SSH_KEY_VALUE")

AUTO_INSTALL_POSTGRES=$(printf '%s\n' "$TARGET_AUTO_INSTALL_POSTGRES_VALUE")
AUTO_CREATE_PGUSER=$(printf '%s\n' "$TARGET_AUTO_CREATE_PGUSER_VALUE")
PGUSER_SUPERUSER=$(printf '%s\n' "$TARGET_PGUSER_SUPERUSER_VALUE")
AUTO_CONFIGURE_SUDOERS=$(printf '%s\n' "$TARGET_AUTO_CONFIGURE_SUDOERS_VALUE")
EXCLUDED_RESTORE_ROLES=$(printf '%s\n' "$TARGET_EXCLUDED_RESTORE_ROLES_VALUE")
EOF

log "Copie du .env cible"
copy_file_to_remote_via_ssh "$TMP_ENV_FILE" "$TARGET_ENV_FILE_PATH" "600"

REMOTE_SSH_DIR="$(dirname "$TARGET_SSH_KEY_VALUE")"
REMOTE_KNOWN_HOSTS="${REMOTE_SSH_DIR}/known_hosts"

log "Copie de la clé privée backup sur la cible"
copy_file_to_remote_via_ssh "$TARGET_BACKUP_SOURCE_SSH_PRIVATE_KEY_VALUE" "$TARGET_SSH_KEY_VALUE" "600"

if [[ -n "$TARGET_BACKUP_SOURCE_SSH_PUBLIC_KEY_VALUE" ]]; then
  log "Copie de la clé publique backup sur la cible"
  copy_file_to_remote_via_ssh "$TARGET_BACKUP_SOURCE_SSH_PUBLIC_KEY_VALUE" "${TARGET_SSH_KEY_VALUE}.pub" "644"
fi

REMOTE_SSH_PERMS_CMD="
set -euo pipefail
chmod 700 $(shell_quote "$REMOTE_SSH_DIR")
chmod 600 $(shell_quote "$TARGET_SSH_KEY_VALUE")
if [[ -f $(shell_quote "${TARGET_SSH_KEY_VALUE}.pub") ]]; then
  chmod 644 $(shell_quote "${TARGET_SSH_KEY_VALUE}.pub")
fi
touch $(shell_quote "$REMOTE_KNOWN_HOSTS")
chmod 644 $(shell_quote "$REMOTE_KNOWN_HOSTS")
"

log "Correction des permissions SSH côté cible"
ssh "${SSH_OPTS[@]}" "$REMOTE" "$REMOTE_SSH_PERMS_CMD" \
  || fail "échec de correction des permissions SSH sur la cible"

REMOTE_KNOWN_HOSTS_CMD="
set -euo pipefail

if ! command -v ssh-keyscan >/dev/null 2>&1; then
  echo 'ssh-keyscan absent sur la cible' >&2
  exit 1
fi

if ! ssh-keygen -F $(shell_quote "$TARGET_BACKUP_REMOTE_HOST_VALUE") -f $(shell_quote "$REMOTE_KNOWN_HOSTS") >/dev/null 2>&1; then
  ssh-keyscan -p $(shell_quote "$TARGET_BACKUP_REMOTE_SSH_PORT_VALUE") -H $(shell_quote "$TARGET_BACKUP_REMOTE_HOST_VALUE") >> $(shell_quote "$REMOTE_KNOWN_HOSTS") 2>/dev/null
fi
"

log "Ajout du serveur de backup dans known_hosts côté cible"
ssh "${SSH_OPTS[@]}" "$REMOTE" "$REMOTE_KNOWN_HOSTS_CMD" \
  || fail "échec de préparation known_hosts sur la cible"

STRICT_OPTION="yes"
case "${TARGET_BACKUP_KNOWN_HOSTS_STRICT_VALUE,,}" in
  yes|y|oui|o|true|1) STRICT_OPTION="yes" ;;
  no|n|non|false|0) STRICT_OPTION="no" ;;
  *) fail "TARGET_BACKUP_KNOWN_HOSTS_STRICT invalide" ;;
esac

REMOTE_BACKUP_TEST_CMD="
set -euo pipefail

ssh \
  -i $(shell_quote "$TARGET_SSH_KEY_VALUE") \
  -p $(shell_quote "$TARGET_BACKUP_REMOTE_SSH_PORT_VALUE") \
  -o IdentitiesOnly=yes \
  -o BatchMode=yes \
  -o ConnectTimeout=8 \
  -o StrictHostKeyChecking=$(shell_quote "$STRICT_OPTION") \
  $(shell_quote "${TARGET_BACKUP_REMOTE_USER_VALUE}@${TARGET_BACKUP_REMOTE_HOST_VALUE}") \
  test -d $(shell_quote "$TARGET_BACKUP_REMOTE_DIR_VALUE")
"

log "Test de la connexion SSH cible -> backup"
ssh "${SSH_OPTS[@]}" "$REMOTE" "$REMOTE_BACKUP_TEST_CMD" \
  || fail "la cible ne peut pas accéder au serveur de backup avec la clé fournie"

if [[ "$ALLOW_PASSWORDLESS_SUDO" == "yes" ]]; then
  REMOTE_SUDOERS_CMD="
set -euo pipefail

run_root() {
  if [ \"\$(id -u)\" -eq 0 ]; then
    \"\$@\"
    return 0
  fi

  if command -v sudo >/dev/null 2>&1; then
    sudo -n \"\$@\" || {
      echo 'sudo -n indisponible pour installer sudoers' >&2
      exit 1
    }
    return 0
  fi

  echo 'ni root ni sudo disponible pour sudoers' >&2
  exit 1
}

if ! command -v visudo >/dev/null 2>&1; then
  run_root apt-get update
  run_root apt-get install -y sudo
fi

TMP_SUDOERS_FILE=\$(mktemp)
cat >\"\$TMP_SUDOERS_FILE\" <<EOF
${TARGET_RUNTIME_USER_VALUE} ALL=(root) NOPASSWD: /usr/bin/apt, /usr/bin/apt-get, /usr/bin/systemctl
${TARGET_RUNTIME_USER_VALUE} ALL=(postgres) NOPASSWD: /usr/bin/psql
EOF

chmod 440 \"\$TMP_SUDOERS_FILE\"

visudo -cf \"\$TMP_SUDOERS_FILE\" >/dev/null 2>&1 || {
  rm -f \"\$TMP_SUDOERS_FILE\"
  echo 'fichier sudoers généré invalide' >&2
  exit 1
}

run_root install -m 440 \"\$TMP_SUDOERS_FILE\" /etc/sudoers.d/rebuild-bdd-${TARGET_RUNTIME_USER_VALUE}
rm -f \"\$TMP_SUDOERS_FILE\"
"

  log "Installation du sudoers non interactif minimal"
  ssh "${SSH_OPTS[@]}" "$REMOTE" "$REMOTE_SUDOERS_CMD" \
    || fail "échec d'installation du sudoers non interactif"
else
  log "Installation du sudoers non interactif désactivée."
fi

REMOTE_REPO_CMD="
set -euo pipefail

if [[ ! -d $(shell_quote "${TARGET_REPO_DIR}/.git") ]]; then
  rm -rf $(shell_quote "$TARGET_REPO_DIR")
  git clone --branch $(shell_quote "$TARGET_REPO_BRANCH") --single-branch $(shell_quote "$TARGET_REPO_URL") $(shell_quote "$TARGET_REPO_DIR")
else
  git -C $(shell_quote "$TARGET_REPO_DIR") fetch --prune origin
  git -C $(shell_quote "$TARGET_REPO_DIR") checkout -f $(shell_quote "$TARGET_REPO_BRANCH")
  git -C $(shell_quote "$TARGET_REPO_DIR") reset --hard origin/$(shell_quote "$TARGET_REPO_BRANCH")
fi

chmod 700 $(shell_quote "$TARGET_REPO_DIR/run-rebuild-bdd.sh") 2>/dev/null || true
chmod 700 $(shell_quote "$TARGET_REPO_DIR/rebuild-bdd-core.sh") 2>/dev/null || true
chmod 700 $(shell_quote "$TARGET_REPO_DIR/Checkup/check-postgresql.sh") 2>/dev/null || true
chmod 700 $(shell_quote "$TARGET_REPO_DIR/Checkup/check-target-readiness.sh") 2>/dev/null || true
"

log "Clone / mise à jour du dépôt distant"
ssh "${SSH_OPTS[@]}" "$REMOTE" "$REMOTE_REPO_CMD" \
  || fail "échec de synchronisation du dépôt sur la cible"

REMOTE_VALIDATE_SUDO_ROOT_CMD="
set -euo pipefail
command -v sudo >/dev/null 2>&1 || {
  echo 'sudo absent sur la cible' >&2
  exit 1
}
sudo -n true >/dev/null 2>&1 || {
  echo 'sudo -n indisponible' >&2
  exit 1
}
"

log "Validation initiale de sudo -n"
ssh "${SSH_OPTS[@]}" "$REMOTE" "$REMOTE_VALIDATE_SUDO_ROOT_CMD" \
  || fail "sudo -n invalide sur la cible"

REMOTE_RUN_CHECK_PG_CMD="
set -euo pipefail

CHECK_SCRIPT=$(shell_quote "${TARGET_REPO_DIR}/Checkup/check-postgresql.sh")
ENV_FILE=$(shell_quote "$TARGET_ENV_FILE_PATH")

[[ -x \"\$CHECK_SCRIPT\" ]] || chmod 700 \"\$CHECK_SCRIPT\"

\"\$CHECK_SCRIPT\" --env-file \"\$ENV_FILE\" --non-interactive
"

log "Préparation PostgreSQL via check-postgresql.sh"
ssh "${SSH_OPTS[@]}" "$REMOTE" "$REMOTE_RUN_CHECK_PG_CMD" \
  || fail "échec de préparation PostgreSQL pendant le bootstrap"

REMOTE_VALIDATE_SUDO_POSTGRES_CMD="
set -euo pipefail
sudo -n -u postgres true >/dev/null 2>&1 || {
  echo 'sudo -n -u postgres indisponible après préparation PostgreSQL' >&2
  exit 1
}
"

log "Validation finale de sudo -n -u postgres"
ssh "${SSH_OPTS[@]}" "$REMOTE" "$REMOTE_VALIDATE_SUDO_POSTGRES_CMD" \
  || fail "sudo -n -u postgres invalide sur la cible"

success "bootstrap initial terminé pour ${TARGET_NAME}"