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

NODE_MAJOR_REQUIRED=22
NODESOURCE_SETUP_URL="https://deb.nodesource.com/setup_${NODE_MAJOR_REQUIRED}.x"

SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd -- "${SCRIPT_DIR}/.." && pwd)"

if [[ ! -f "${REPO_ROOT}/package.json" ]]; then
  echo "Repo-Root nicht gefunden. Erwartet: ${REPO_ROOT}/package.json"
  exit 1
fi

if ! command -v apt-get >/dev/null 2>&1; then
  echo "Dieses Setup-Script unterstuetzt aktuell Debian/Ubuntu mit apt-get."
  exit 1
fi

SUDO=()
if [[ "${EUID}" -ne 0 ]]; then
  if ! command -v sudo >/dev/null 2>&1; then
    echo "Bitte als root ausfuehren oder sudo installieren."
    exit 1
  fi
  SUDO=(sudo)
fi

run_apt() {
  if [[ "${#SUDO[@]}" -gt 0 ]]; then
    "${SUDO[@]}" env DEBIAN_FRONTEND=noninteractive apt-get "$@"
  else
    DEBIAN_FRONTEND=noninteractive apt-get "$@"
  fi
}

run_as_root_preserve_env() {
  if [[ "${#SUDO[@]}" -gt 0 ]]; then
    "${SUDO[@]}" -E "$@"
  else
    "$@"
  fi
}

node_major() {
  node -p 'Number(process.versions.node.split(".")[0])' 2>/dev/null || echo 0
}

echo "Installiere Basiswerkzeuge fuer die lokale Webapp..."
run_apt update
run_apt install -y ca-certificates curl gnupg git bash build-essential

CURRENT_NODE_MAJOR="$(node_major)"
if [[ "${CURRENT_NODE_MAJOR}" -lt "${NODE_MAJOR_REQUIRED}" ]]; then
  echo "Installiere Node.js ${NODE_MAJOR_REQUIRED}.x ueber NodeSource..."
  TMP_SETUP="$(mktemp)"
  curl -fsSL "${NODESOURCE_SETUP_URL}" -o "${TMP_SETUP}"
  run_as_root_preserve_env bash "${TMP_SETUP}"
  rm -f "${TMP_SETUP}"
  run_apt install -y nodejs
else
  echo "Node.js $(node --version) ist bereits kompatibel."
fi

CURRENT_NODE_MAJOR="$(node_major)"
if [[ "${CURRENT_NODE_MAJOR}" -lt "${NODE_MAJOR_REQUIRED}" ]]; then
  echo "Node.js >= ${NODE_MAJOR_REQUIRED} wird benoetigt, aktiv ist aber: $(node --version 2>/dev/null || echo nicht installiert)"
  exit 1
fi

if ! command -v npm >/dev/null 2>&1; then
  echo "npm wurde nicht gefunden. Bitte Node.js/npm Installation pruefen."
  exit 1
fi

echo "Installiere npm-Abhaengigkeiten im Repo..."
cd "${REPO_ROOT}"
if [[ -f package-lock.json ]]; then
  npm ci --include=dev
else
  npm install --include=dev
fi

chmod +x "${REPO_ROOT}/scripts/start-local.sh"

echo
echo "Fertig. Zum Starten noch DATABASE_URL setzen und dann ausfuehren:"
echo "  npm run serve:local"