#!/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)"

set +e
alias die=''
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 $RESOLVEDIP";  fi;
alias die='EXIT=$? LINE=$LINENO error_exit'
set -e

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"
apt-get install -y curl &>/dev/null
apt-get install -y sudo &>/dev/null
msg_ok "Installed Dependencies"

get_latest_release() {
   curl -sL https://api.github.com/repos/$1/releases/latest | grep '"tag_name":' | cut -d'"' -f4
}

DOCKER_LATEST_VERSION=$(get_latest_release "moby/moby")
PORTAINER_LATEST_VERSION=$(get_latest_release "portainer/portainer")
DOCKER_COMPOSE_LATEST_VERSION=$(get_latest_release "docker/compose")

msg_info "Installing Docker $DOCKER_LATEST_VERSION"
DOCKER_CONFIG_PATH='/etc/docker/daemon.json'
mkdir -p $(dirname $DOCKER_CONFIG_PATH)
cat >$DOCKER_CONFIG_PATH <<'EOF'
{
  "log-driver": "journald"
}
EOF
sh <(curl -sSL https://get.docker.com) &>/dev/null
msg_ok "Installed Docker $DOCKER_LATEST_VERSION"

read -r -p "Would you like to add Portainer? <y/N> " prompt
if [[ $prompt == "y" || $prompt == "Y" || $prompt == "yes" || $prompt == "Yes" ]]
then
PORTAINER="Y"
else
PORTAINER="N"
fi

if [[ $PORTAINER == "Y" ]]; then
msg_info "Installing Portainer $PORTAINER_LATEST_VERSION"
docker volume create portainer_data >/dev/null
docker run -d \
  -p 8000:8000 \
  -p 9000:9000 \
  --name=portainer \
  --restart=always \
  -v /var/run/docker.sock:/var/run/docker.sock \
  -v portainer_data:/data \
  portainer/portainer-ce:latest &>/dev/null
msg_ok "Installed Portainer $PORTAINER_LATEST_VERSION"
fi

read -r -p "Would you like to add Docker Compose? <y/N> " prompt
if [[ $prompt == "y" || $prompt == "Y" || $prompt == "yes" || $prompt == "Yes" ]]
then
DOCKER_COMPOSE="Y"
else
DOCKER_COMPOSE="N"
fi

if [[ $DOCKER_COMPOSE == "Y" ]]; then
msg_info "Installing Docker Compose $DOCKER_COMPOSE_LATEST_VERSION"
  DOCKER_CONFIG=${DOCKER_CONFIG:-$HOME/.docker}
  mkdir -p $DOCKER_CONFIG/cli-plugins
  curl -sSL https://github.com/docker/compose/releases/download/$DOCKER_COMPOSE_LATEST_VERSION/docker-compose-linux-x86_64 -o ~/.docker/cli-plugins/docker-compose  
  chmod +x $DOCKER_CONFIG/cli-plugins/docker-compose
msg_ok "Installed Docker Compose $DOCKER_COMPOSE_LATEST_VERSION"
fi

PASS=$(grep -w "root" /etc/shadow | cut -b6);
  if [[ $PASS != $ ]]; then
msg_info "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//')
msg_ok "Customized Container"
  fi
  
msg_info "Cleaning up"
apt-get autoremove >/dev/null
apt-get autoclean >/dev/null
msg_ok "Cleaned"