#!/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'
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"
}

RD=`echo "\033[01;31m"`
BL=`echo "\033[36m"`
GN=`echo "\033[1;92m"`
CL=`echo "\033[m"`
CM="${GN}✓${CL}"
CROSS="${RD}✗${CL}"
RETRY_NUM=10
RETRY_EVERY=3
NUM=$RETRY_NUM

echo -en "${GN} Setting up Container OS... "
sed -i "/$LANG/ s/\(^# \)//" /etc/locale.gen
locale-gen >/dev/null
while [ "$(hostname -I)" = "" ]; do
  1>&2 echo -en "${CROSS}${RD}  No Network! "
  sleep $RETRY_EVERY
  ((NUM--))
  if [ $NUM -eq 0 ]
  then
    1>&2 echo -e "${CROSS}${RD}  No Network After $RETRY_NUM Tries${CL}"    
    exit 1
  fi
done
echo -e "${CM}${CL} \r"
echo -en "${GN} Network Connected: ${BL}$(hostname -I)${CL} "
echo -e "${CM}${CL} \r"

echo -en "${GN} Updating Container OS... "
apt update &>/dev/null
apt-get -qqy upgrade &>/dev/null
echo -e "${CM}${CL} \r"

echo -en "${GN} Installing Dependencies... "
apt-get install -y curl &>/dev/null
apt-get install -y sudo &>/dev/null
echo -e "${CM}${CL} \r"

echo -en "${GN} Installing PHP... "
apt-get install -y php &>/dev/null
apt-get install -y php-sqlite3 &>/dev/null
apt-get install -y php-zip &>/dev/null
echo -e "${CM}${CL} \r"

RELEASE=$(curl -sX GET "https://api.github.com/repos/linuxserver/Heimdall/releases/latest" | awk '/tag_name/{print $4;exit}' FS='[""]')
echo -en "${GN} Installing Heimdall Dashboard ${RELEASE}... "
curl --silent -o ${RELEASE}.tar.gz -L "https://github.com/linuxserver/Heimdall/archive/${RELEASE}.tar.gz" &>/dev/null
tar xvzf ${RELEASE}.tar.gz &>/dev/null
VER=$(curl -s https://api.github.com/repos/linuxserver/Heimdall/releases/latest \
| grep "tag_name" \
| awk '{print substr($2, 3, length($2)-4) }')
rm -rf ${RELEASE}.tar.gz
mv Heimdall-${VER} /opt/Heimdall
echo -e "${CM}${CL} \r"

echo -en "${GN} Creating Service... "
service_path="/etc/systemd/system/heimdall.service"
echo "[Unit]
Description=Heimdall
After=network.target

[Service]
Restart=always
RestartSec=5
Type=simple
User=root
WorkingDirectory=/opt/Heimdall
ExecStart="/usr/bin/php" artisan serve --port 7990 --host 0.0.0.0
TimeoutStopSec=30

[Install]
WantedBy=multi-user.target" > $service_path
sudo systemctl enable --now heimdall.service &>/dev/null
echo -e "${CM}${CL} \r"

PASS=$(grep -w "root" /etc/shadow | cut -b6);
  if [[ $PASS != $ ]]; then
echo -en "${GN} Customizing Container... "
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 $GETTY_OVERRIDE) | sed 's/\.d//')
echo -e "${CM}${CL} \r"
  fi
  
echo -en "${GN} Cleanup... "
apt-get autoremove >/dev/null
apt-get autoclean >/dev/null
rm -rf /var/{cache,log}/* /var/lib/apt/lists/*
echo -e "${CM}${CL} \n"