#!/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'
CROSS='\033[1;31m\xE2\x9D\x8C\033[0m'
CHECKMARK='\033[0;32m\xE2\x9C\x94\033[0m'
RETRY_NUM=5
RETRY_EVERY=3
NUM=$RETRY_NUM
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
while [ "$(hostname -I)" = "" ]; do
  1>&2 echo -e "${CROSS} \e[1;31m No Network: \e[0m $(date)"
  sleep $RETRY_EVERY
  ((NUM--))
  if [ $NUM -eq 0 ]
  then
    1>&2 echo -e "${CROSS} \e[1;31m No Network After $RETRY_NUM Tries \e[0m"
    exit 1
  fi
done
  echo -e "${CHECKMARK} \e[1;92m Network Connected: \e[0m $(hostname -I)"

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

echo -e "${CHECKMARK} \e[1;92m Installing Dependencies... \e[0m"
apt-get update &>/dev/null
apt-get -qqy install \
    curl \
    sudo &>/dev/null

echo -e "${CHECKMARK} \e[1;92m Installing pip3... \e[0m"
apt-get install -y python3-pip &>/dev/null

echo -e "${CHECKMARK} \e[1;92m Installing Docker... \e[0m"
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

echo -e "${CHECKMARK} \e[1;92m Pulling Portainer Image...\e[0m"
docker pull portainer/portainer-ce:latest &>/dev/null

echo -e "${CHECKMARK} \e[1;92m Installing Portainer... \e[0m"
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

echo -e "${CHECKMARK} \e[1;92m Pulling Home Assistant Image...\e[0m"
docker pull homeassistant/home-assistant:stable &>/dev/null

echo -e "${CHECKMARK} \e[1;92m Installing Home Assistant... \e[0m"
docker volume create hass_config >/dev/null
docker run -d \
  --name homeassistant \
  --privileged \
  --restart unless-stopped \
  -v /var/run/docker.sock:/var/run/docker.sock \
  -v /dev:/dev \
  -v hass_config:/config \
  -v /etc/localtime:/etc/localtime:ro \
  -v /etc/timezone:/etc/timezone:ro \
  --net=host \
  homeassistant/home-assistant:stable &>/dev/null

echo -e "${CHECKMARK} \e[1;92m Creating Update-Containers Script... \e[0m"
pip3 install runlike &>/dev/null
UPDATE_CONTAINERS_PATH='/root/update-containers.sh'
cat >$UPDATE_CONTAINERS_PATH <<'EOF'
#!/bin/bash
set -o errexit
CONTAINER_LIST="${1:-$(docker ps -q)}"
for container in ${CONTAINER_LIST}; do
  CONTAINER_IMAGE="$(docker inspect --format "{{.Config.Image}}" --type container ${container})"
  RUNNING_IMAGE="$(docker inspect --format "{{.Image}}" --type container "${container}")"
  docker pull "${CONTAINER_IMAGE}"
  LATEST_IMAGE="$(docker inspect --format "{{.Id}}" --type image "${CONTAINER_IMAGE}")"
  if [[ "${RUNNING_IMAGE}" != "${LATEST_IMAGE}" ]]; then
    echo "Updating ${container} image ${CONTAINER_IMAGE}"
    DOCKER_COMMAND="$(runlike "${container}")"
    docker rm --force "${container}"
    eval ${DOCKER_COMMAND}
  fi 
done
docker image prune -af 
EOF
sudo chmod +x /root/update-containers.sh

echo -e "${CHECKMARK} \e[1;92m Customizing LXC... \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 /ha_setup.sh /var/{cache,log}/* /var/lib/apt/lists/*