#!/usr/bin/env bash
# DECNET bootstrap installer for agent {{ agent_name }} -> master {{ master_host }}.
# Fetches the code+certs payload, installs, and starts the agent daemon.
# Generated by the master at {{ generated_at }}. Expires {{ expires_at }}.
set -euo pipefail

[[ $EUID -eq 0 ]] || { echo "decnet-install: must run as root (use sudo)"; exit 1; }
for bin in python3 curl tar; do
  command -v "$bin" >/dev/null || { echo "decnet-install: $bin required"; exit 1; }
done

WORK="$(mktemp -d)"
trap 'rm -rf "$WORK"' EXIT

echo "[DECNET] fetching payload..."
curl -fsSL "{{ tarball_url }}" | tar -xz -C "$WORK"

INSTALL_DIR=/opt/decnet
mkdir -p "$INSTALL_DIR"
cp -a "$WORK/." "$INSTALL_DIR/"
cd "$INSTALL_DIR"

echo "[DECNET] building venv..."
python3 -m venv .venv
.venv/bin/pip install -q --upgrade pip
.venv/bin/pip install -q -e .

install -Dm0644 etc/decnet/decnet.ini /etc/decnet/decnet.ini
[[ -f services.ini ]] && install -Dm0644 services.ini /etc/decnet/services.ini

# Log directory the baked-in INI points at — must exist before `decnet` imports config.
install -d -m0755 /var/log/decnet

REAL_USER="${SUDO_USER:-root}"
REAL_HOME="$(getent passwd "$REAL_USER" | cut -d: -f6)"
for f in ca.crt worker.crt worker.key; do
  install -Dm0600 -o "$REAL_USER" -g "$REAL_USER" \
    "home/.decnet/agent/$f" "$REAL_HOME/.decnet/agent/$f"
done

WITH_UPDATER="{{ with_updater }}"
if [[ "$WITH_UPDATER" == "true" && -d home/.decnet/updater ]]; then
  for f in ca.crt updater.crt updater.key; do
    install -Dm0600 -o "$REAL_USER" -g "$REAL_USER" \
      "home/.decnet/updater/$f" "$REAL_HOME/.decnet/updater/$f"
  done
fi

# Guarantee the pip-installed entrypoint is executable (some setuptools+editable
# combos drop it with mode 0644) and expose it on PATH.
chmod 0755 "$INSTALL_DIR/.venv/bin/decnet"
ln -sf "$INSTALL_DIR/.venv/bin/decnet" /usr/local/bin/decnet
sudo -u "$REAL_USER" /usr/local/bin/decnet agent --daemon
if [[ "$WITH_UPDATER" == "true" ]]; then
  sudo -u "$REAL_USER" /usr/local/bin/decnet updater --daemon
fi
echo "[DECNET] agent {{ agent_name }} enrolled -> {{ master_host }}. Forwarder auto-spawned."