#!/usr/bin/env bash
YW=`echo "\033[33m"`
RD=`echo "\033[01;31m"`
BL=`echo "\033[36m"`
GN=`echo "\033[1;92m"`
CL=`echo "\033[m"`
RETRY_NUM=10
RETRY_EVERY=3
NUM=$RETRY_NUM
CM="${GN}✓${CL}"
CROSS="${RD}✗${CL}"
BFR="\\r\\033[K"
HOLD="-"
set -o errexit
set -o errtrace
set -o nounset
set -o pipefail
shopt -s expand_aliases
alias die='EXIT=$? LINE=$LINENO error_exit'
trap die ERR

function error_exit() {
  trap - ERR
  local reason="Unknown failure occurred."
  local msg="${1:-$reason}"
  local flag="${RD}‼ ERROR ${CL}$EXIT@$LINE"
  echo -e "$flag $msg" 1>&2
  exit $EXIT
}

function msg_info() {
    local msg="$1"
    echo -ne " ${HOLD} ${YW}${msg}..."
}

function msg_ok() {
    local msg="$1"
    echo -e "${BFR} ${CM} ${GN}${msg}${CL}"
}
function msg_error() {
    local msg="$1"
    echo -e "${BFR} ${CROSS} ${RD}${msg}${CL}"
}

msg_info "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
msg_ok "Set up Container OS"
msg_ok "Network Connected: ${BL}$(hostname -I)"

if nc -zw1 8.8.8.8 443; then  msg_ok "Internet Connected"; else  msg_error "Internet NOT Connected"; exit 1; fi;
RESOLVEDIP=$(nslookup "github.com" | awk -F':' '/^Address: / { matched = 1 } matched { print $2}' | xargs)
if [[ -z "$RESOLVEDIP" ]]; then msg_error "DNS Lookup Failure";  else msg_ok "DNS Resolved github.com to $RESOLVEDIP";  fi;

msg_info "Updating Container OS"
apt-get update &>/dev/null
apt-get -y upgrade &>/dev/null
msg_ok "Updated Container OS"

msg_info "Installing Dependencies (patience)"
apt-get install -y curl &>/dev/null
apt-get install -y sudo &>/dev/null
apt-get install -y ffmpeg &>/dev/null
msg_ok "Installed Dependencies"

RELEASE=$(curl -s https://api.github.com/repos/navidrome/navidrome/releases/latest \
| grep "tag_name" \
| awk '{print substr($2, 3, length($2)-4) }')

msg_info "Installing Navidrome"
sudo install -d -o root -g root /opt/navidrome
sudo install -d -o root -g root /var/lib/navidrome
wget https://github.com/navidrome/navidrome/releases/download/v${RELEASE}/navidrome_${RELEASE}_Linux_x86_64.tar.gz -O Navidrome.tar.gz &>/dev/null
sudo tar -xvzf Navidrome.tar.gz -C /opt/navidrome/ &>/dev/null
sudo chown -R root:root /opt/navidrome 
mkdir -p /music
cat <<EOF > /var/lib/navidrome/navidrome.toml
MusicFolder = '/music'
EOF
msg_ok "Installed Navidrome"

msg_info "Creating Service"
service_path="/etc/systemd/system/navidrome.service"

echo "[Unit]
Description=Navidrome Music Server and Streamer compatible with Subsonic/Airsonic
After=remote-fs.target network.target
AssertPathExists=/var/lib/navidrome

[Service]
User=root
Group=root
Type=simple
ExecStart=/opt/navidrome/navidrome --configfile '/var/lib/navidrome/navidrome.toml'
WorkingDirectory=/var/lib/navidrome
TimeoutStopSec=20
KillMode=process
Restart=on-failure
DevicePolicy=closed
NoNewPrivileges=yes
PrivateTmp=yes
PrivateUsers=yes
ProtectControlGroups=yes
ProtectKernelModules=yes
ProtectKernelTunables=yes
RestrictAddressFamilies=AF_UNIX AF_INET AF_INET6
RestrictNamespaces=yes
RestrictRealtime=yes
SystemCallFilter=~@clock @debug @module @mount @obsolete @reboot @setuid @swap
ReadWritePaths=/var/lib/navidrome
ProtectSystem=full

[Install]
WantedBy=multi-user.target" > $service_path
systemctl daemon-reload
systemctl enable --now navidrome.service &>/dev/null

msg_ok "Created Service"

PASS=$(grep -w "root" /etc/shadow | cut -b6);
  if [[ $PASS != $ ]]; then
msg_info "Customizing Container"
chmod -x /etc/update-motd.d/*
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//')
msg_ok "Customized Container"
  fi
  
msg_info "Cleaning up"
apt-get autoremove >/dev/null
apt-get autoclean >/dev/null
rm -rf /root/Navidrome.tar.gz
msg_ok "Cleaned"