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

SRC_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DEST_DIR="/opt/jibo-hub-shim"
CONF_DIR="/etc/jibo-hub-shim"
SERVICE_FILE_SRC="$SRC_DIR/systemd/jibo-hub-shim.service"
SERVICE_FILE_DEST="/etc/systemd/system/jibo-hub-shim.service"

if [[ $EUID -ne 0 ]]; then
  echo "Please run as root (sudo)." >&2
  exit 1
fi

mkdir -p "$DEST_DIR" "$CONF_DIR"

# Copy code (keep node_modules on server side; do not copy any from build tree)
rsync -a --delete \
  --exclude node_modules \
  --exclude .git \
  --exclude '*.log' \
  "$SRC_DIR/" "$DEST_DIR/"

# Install default config if missing
if [[ ! -f "$CONF_DIR/config.json" ]]; then
  if [[ -f "$SRC_DIR/config.example.json" ]]; then
    cp "$SRC_DIR/config.example.json" "$CONF_DIR/config.json"
  elif [[ -f "$SRC_DIR/config.json" ]]; then
    cp "$SRC_DIR/config.json" "$CONF_DIR/config.json"
  else
    echo "No config.example.json found; create $CONF_DIR/config.json manually." >&2
  fi
fi

# Install env file if missing
if [[ ! -f "$CONF_DIR/jibo-hub-shim.env" ]]; then
  cp "$SRC_DIR/systemd/jibo-hub-shim.env.example" "$CONF_DIR/jibo-hub-shim.env"
fi

# Install/refresh systemd unit
install -m 0644 "$SERVICE_FILE_SRC" "$SERVICE_FILE_DEST"

systemctl daemon-reload

# Install dependencies if npm exists
if command -v npm >/dev/null 2>&1; then
  cd "$DEST_DIR"
  npm install --omit=dev
else
  echo "npm not found; ensure the 'ws' module is available for node resolution." >&2
fi

systemctl enable --now jibo-hub-shim.service

echo
systemctl --no-pager --full status jibo-hub-shim.service || true

echo
echo "Installed. Config: $CONF_DIR/config.json"
echo "Logs: journalctl -u jibo-hub-shim -f"