#!/bin/bash

apt-get install -y unattended-upgrades

. /etc/os-release

# enable update on debian
if [ "${ID}" == "debian" ]; then
  sed -i 's|//      "o=Debian,a=stable";|        "o=Debian,a=stable";|g' /etc/apt/apt.conf.d/50unattended-upgrades
  sed -i 's|//      "o=Debian,a=stable-updates";|        "o=Debian,a=stable-updates";|g' /etc/apt/apt.conf.d/50unattended-upgrades
fi

# enable autoupdate for Ubuntu updates repository
if [ "${ID}" == "ubuntu" ]; then
  sed -i 's|//      "${distro_id}:${distro_codename}-updates";|        "${distro_id}:${distro_codename}-updates"; |g' /etc/apt/apt.conf.d/50unattended-upgrades
fi

# reconfigure
if [ $(grep "APT::Periodic::Unattended-Upgrade" /etc/apt/apt.conf.d/10periodic 2> /dev/null | wc -l) -gt 0 ]; then
  sed -i 's|APT::Periodic::Unattended-Upgrade "0";|APT::Periodic::Unattended-Upgrade "1";|g' /etc/apt/apt.conf.d/10periodic
else
  echo 'APT::Periodic::Unattended-Upgrade "1";' >> /etc/apt/apt.conf.d/10periodic
fi

if [ $(grep "APT::Periodic::Update-Package-Lists" /etc/apt/apt.conf.d/10periodic 2> /dev/null | wc -l) -gt 0 ]; then
  sed -i 's|APT::Periodic::Update-Package-Lists "0";|APT::Periodic::Update-Package-Lists "1";|g' /etc/apt/apt.conf.d/10periodic
else
  echo 'APT::Periodic::Update-Package-Lists "1";' >> /etc/apt/apt.conf.d/10periodic
fi

if [ $(grep "APT::Periodic::Download-Upgradeable-Packages" /etc/apt/apt.conf.d/10periodic 2> /dev/null | wc -l) -gt 0 ]; then
  sed -i 's|APT::Periodic::Download-Upgradeable-Packages "0";|APT::Periodic::Download-Upgradeable-Packages "1";|g' /etc/apt/apt.conf.d/10periodic
else
  echo 'APT::Periodic::Download-Upgradeable-Packages "1";' >> /etc/apt/apt.conf.d/10periodic
fi

if [ $(grep "APT::Periodic::AutocleanInterval" /etc/apt/apt.conf.d/10periodic 2> /dev/null | wc -l) -gt 0 ]; then
  sed -i 's|APT::Periodic::AutocleanInterval "0";|APT::Periodic::AutocleanInterval "1";|g' /etc/apt/apt.conf.d/10periodic
else
  echo 'APT::Periodic::AutocleanInterval "1";' >> /etc/apt/apt.conf.d/10periodic
fi

# enable email notification when mailx is installed
$(dpkg-query -l mailx > /dev/null 2>&1)
if [ $? -eq 0 ]; then
  sed -i 's|//Unattended-Upgrade::Mail|Unattended-Upgrade::Mail|g' /etc/apt/apt.conf.d/50unattended-upgrades
fi

sed -i 's|//Unattended-Upgrade::MinimalSteps "true";|Unattended-Upgrade::MinimalSteps "true";|g' /etc/apt/apt.conf.d/50unattended-upgrades