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

if [[ "${EUID}" -ne 0 ]]; then
  echo "Bitte als root ausfuehren: sudo ./install.sh"
  exit 1
fi

PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
APP_ROOT="/opt/serial-bridge"
CONFIG_ROOT="/etc/serial-bridge"

apt-get update
apt-get install -y \
  python3 \
  python3-venv \
  python3-pip \
  hostapd \
  dnsmasq \
  iw \
  wpasupplicant \
  iproute2 \
  rfkill \
  i2c-tools

install -d -m 755 "${APP_ROOT}" "${APP_ROOT}/src" "${APP_ROOT}/templates" "${APP_ROOT}/static" "${CONFIG_ROOT}"

cp -a "${PROJECT_ROOT}/src/." "${APP_ROOT}/src/"
cp -a "${PROJECT_ROOT}/templates/." "${APP_ROOT}/templates/"
cp -a "${PROJECT_ROOT}/static/." "${APP_ROOT}/static/"
cp "${PROJECT_ROOT}/requirements.txt" "${APP_ROOT}/requirements.txt"

python3 -m venv "${APP_ROOT}/.venv"
"${APP_ROOT}/.venv/bin/pip" install --upgrade pip
"${APP_ROOT}/.venv/bin/pip" install -r "${APP_ROOT}/requirements.txt"

install -m 644 "${PROJECT_ROOT}/config/hostapd.conf" "${CONFIG_ROOT}/hostapd.conf"
install -m 644 "${PROJECT_ROOT}/config/dnsmasq.conf" "${CONFIG_ROOT}/dnsmasq.conf"

install -m 644 "${PROJECT_ROOT}/systemd/serial-hostapd.service" "/etc/systemd/system/serial-hostapd.service"
install -m 644 "${PROJECT_ROOT}/systemd/serial-dnsmasq.service" "/etc/systemd/system/serial-dnsmasq.service"
install -m 644 "${PROJECT_ROOT}/systemd/serial-bridge.service" "/etc/systemd/system/serial-bridge.service"

WPA_CONF="/etc/wpa_supplicant/wpa_supplicant.conf"
touch "${WPA_CONF}"
grep -q '^ctrl_interface=' "${WPA_CONF}" || echo 'ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev' >> "${WPA_CONF}"
grep -q '^update_config=' "${WPA_CONF}" || echo 'update_config=1' >> "${WPA_CONF}"

systemctl disable --now hostapd.service || true
systemctl disable --now dnsmasq.service || true

install -d -m 755 /home/pi
chown pi:pi /home/pi || true

systemctl daemon-reload
systemctl enable serial-bridge.service
systemctl restart serial-bridge.service

echo "Installation abgeschlossen. Logs: journalctl -u serial-bridge -f"