#!/bin/bash
# blind_chess — local (chess.local) deploy installer.
#
# Run as root ON THE TARGET HOST. Expects a staging directory containing:
#   server/                     pnpm-deploy bundle (dist/ + node_modules/)
#   client-dist/                vite build output
#   chess-mdns-alias            mDNS alias helper script
#   blind-chess-local.service   systemd unit for the server
#   chess-mdns-alias.service    systemd unit for the mDNS alias
#
# Usage:  sudo bash install-local.sh [STAGE_DIR]
#         (STAGE_DIR defaults to the directory containing this script)
set -euo pipefail

STAGE="${1:-$(cd "$(dirname "$0")" && pwd)}"
echo "=== blind_chess local install (staging: $STAGE) ==="

# --- Node.js 22 (Debian trixie ships only 20; blind_chess needs >=22) ---
need_node=1
if command -v node >/dev/null 2>&1; then
  major="$(node -e 'process.stdout.write(String(process.versions.node.split(".")[0]))' 2>/dev/null || echo 0)"
  if [ "${major:-0}" -ge 22 ] 2>/dev/null; then need_node=0; fi
fi
if [ "$need_node" -eq 1 ]; then
  echo "--- installing Node.js 22 via NodeSource ---"
  curl -fsSL https://deb.nodesource.com/setup_22.x | bash -
  apt-get install -y -o DPkg::Lock::Timeout=600 nodejs
fi
echo "node: $(node --version)"

# --- avahi-utils provides avahi-publish ---
command -v avahi-publish >/dev/null 2>&1 || \
  apt-get install -y -o DPkg::Lock::Timeout=600 avahi-utils

# --- dedicated unprivileged service user ---
getent passwd blindchess >/dev/null 2>&1 || \
  useradd --system --user-group --no-create-home --shell /usr/sbin/nologin blindchess

# --- deploy tree under /opt/blind-chess ---
install -d /opt/blind-chess
rm -rf /opt/blind-chess/server /opt/blind-chess/client
cp -a "$STAGE/server"      /opt/blind-chess/server
install -d /opt/blind-chess/client
cp -a "$STAGE/client-dist" /opt/blind-chess/client/dist
chown -R blindchess:blindchess /opt/blind-chess

# --- mDNS alias helper ---
install -m 0755 "$STAGE/chess-mdns-alias" /usr/local/bin/chess-mdns-alias

# --- systemd units (the server unit installs under the canonical name) ---
install -m 0644 "$STAGE/blind-chess-local.service" /etc/systemd/system/blind-chess.service
install -m 0644 "$STAGE/chess-mdns-alias.service"  /etc/systemd/system/chess-mdns-alias.service
systemctl daemon-reload
systemctl enable --now chess-mdns-alias.service
systemctl enable --now blind-chess.service

echo "=== install complete ==="
systemctl --no-pager --lines=0 status blind-chess.service chess-mdns-alias.service || true