#!/usr/bin/env bash

set -o errexit
set -o errtrace
set -o nounset
set -o pipefail
shopt -s expand_aliases
alias die='EXIT=$? LINE=$LINENO error_exit'
CHECKMARK='\033[0;32m\xE2\x9C\x94\033[0m'
trap die ERR
trap 'die "Script interrupted."' INT

function error_exit() {
  trap - ERR
  local DEFAULT='Unknown failure occured.'
  local REASON="\e[97m${1:-$DEFAULT}\e[39m"
  local FLAG="\e[91m[ERROR:LXC] \e[93m$EXIT@$LINE"
  msg "$FLAG $REASON"
  exit $EXIT
}
function msg() {
  local TEXT="$1"
  echo -e "$TEXT"
}

echo -e "${CHECKMARK} \e[1;92m Setting up Container OS... \e[0m"
sed -i "/$LANG/ s/\(^# \)//" /etc/locale.gen
locale-gen >/dev/null

echo -e "${CHECKMARK} \e[1;92m Updating Container OS... \e[0m"
apt update &>/dev/null
apt-get -qqy upgrade &>/dev/null

echo -e "${CHECKMARK} \e[1;92m Installing Prerequisites... \e[0m"
apt-get update &>/dev/null
apt-get -qqy install \
    curl \
    sudo \
    unzip &>/dev/null
    
    echo -e "${CHECKMARK} \e[1;92m Setting up Node.js Repository... \e[0m"
    sudo curl -sL https://deb.nodesource.com/setup_16.x | sudo -E bash - &>/dev/null
    
    echo -e "${CHECKMARK} \e[1;92m Installing Node.js... \e[0m"
    sudo apt-get install -y nodejs git make g++ gcc &>/dev/null
    
    echo -e "${CHECKMARK} \e[1;92m Installing yarn... \e[0m"
    npm install --global yarn &>/dev/null
    
    echo -e "${CHECKMARK} \e[1;92m Build/Install Zwavejs2MQTT (5-6 min)... \e[0m"
    sudo git clone https://github.com/zwave-js/zwavejs2mqtt /opt/zwavejs2mqtt &>/dev/null
    cd /opt/zwavejs2mqtt &>/dev/null
    yarn install &>/dev/null
    yarn run build &>/dev/null

echo -e "${CHECKMARK} \e[1;92m Creating Service file zwavejs2mqtt.service... \e[0m"
service_path="/etc/systemd/system/zwavejs2mqtt.service"

echo "[Unit]
Description=zwavejs2mqtt
After=network.target
[Service]
ExecStart=/usr/bin/npm start
WorkingDirectory=/opt/zwavejs2mqtt
StandardOutput=inherit
StandardError=inherit
Restart=always
User=root
[Install]
WantedBy=multi-user.target" > $service_path

echo -e "${CHECKMARK} \e[1;92m Customizing container... \e[0m"
rm /etc/motd 
rm /etc/update-motd.d/10-uname 
touch ~/.hushlogin 
GETTY_OVERRIDE="/etc/systemd/system/container-getty@1.service.d/override.conf"
mkdir -p $(dirname $GETTY_OVERRIDE)
cat << EOF > $GETTY_OVERRIDE
[Service]
ExecStart=
ExecStart=-/sbin/agetty --autologin root --noclear --keep-baud tty%I 115200,38400,9600 \$TERM
EOF
systemctl daemon-reload
systemctl restart $(basename $(dirname $GETTY_OVERRIDE) | sed 's/\.d//')

echo -e "${CHECKMARK} \e[1;92m Cleanup... \e[0m"
rm -rf /zwavejs2mqtt_setup.sh /var/{cache,log}/* /var/lib/apt/lists/*
systemctl start zwavejs2mqtt
systemctl enable zwavejs2mqtt &>/dev/null