#!/usr/bin/env bash

# (Keep in mind that default root password is 1234)
# Flash SBC's SD with Armbian and clone this repository in /root

# YOU SHOULD REMOVE THIS SCRIPT AFTER SETUP

# initialization
echo "Starting initialization"
echo $fqdn > /etc/hostname
localectl set-keymap $keymap
timedatectl set-timezone $timezone
systemctl disable apt-daily-upgrade.timer

# install packages
echo "Starting packages installation"
sed -i -e "s/$deb_apt_default_repo/$deb_apt_repo/g" /etc/apt/sources.list
apt update
apt upgrade -y
# TODO define $additional-packages, depending on $use-case and $sbc
apt install -y vim tree tmux neofetch git

# add users
echo "Adding users"
useradd -U -G sudo -m -s /bin/bash $user
chmod 700 /home/$user
echo "Let's define a password for $user as we are about to run sudo with it. It can of course be changed after setup."
passwd $user

# get .sync scripts
echo "Getting and deploying sync configuration"
sudo -H -u $user mkdir $sync_directory_path
sudo -H -u $user git clone https://gitea.kto.black/adminconf/rcs-general.git $sync_directory_path/rcs-general
sudo -H -u $user $sync_directory_path/rcs-general/install.sh
sudo -H -u $user git clone https://gitea.kto.black/adminconf/conf-sync.git $sync_directory_path/conf-sync
sudo -H -u $user cp $sync_directory_path/conf-sync/variables.conf.template \
  $sync_directory_path/conf-sync/variables.conf
sudo -H -u $user sed -i -e "s/\"desktop\"/\"server\"/g" $sync_directory_path/conf-sync/variables.conf
sudo -H -u $user $sync_directory_path/conf-sync/install.sh

# SSH config
echo "Getting SSH public key"
sudo -H -u $user mkdir /home/$user/.ssh
sudo -H -u $user wget -P /home/$user/.ssh $remote_pubkey_location/$remote_pubkey
sudo -H -u $user mv /home/$user/.ssh/$remote_pubkey /home/$user/.ssh/authorized_keys
echo "Editing OpenSSH daemon config..."
sed -i -e "s/#PasswordAuthentication yes/PasswordAuthentication no/g" /etc/ssh/sshd_config
sed -i -e "s/PermitRootLogin yes/PermitRootLogin no/g" /etc/ssh/sshd_config

# specific function for orangepizero
if [[ $default_hostname = 'orangepizero' ]]; then
  echo "Setting CPU frequency to performance"
  sed -i -e "s/GOVERNOR=ondemand/GOVERNOR=performance/g" /etc/default/cpufrequtils
fi

# Only run if the user is root
if [[ $USER != 'root' ]] ; then
  echo "You must run this script as root!"
  exit 1
fi

run_directory_path=$(pwd)

# Set parameters TODO replace by a variables.conf
fqdn='pi2.jab.kto.black'
keymap='fr'
timezone='Europe/Paris'
deb_apt_default_repo='deb.debian.org'
deb_apt_repo='ftp.fr.debian.org'
user='alex'
sync_directory_path="/home/$user/.sync"
systemd_units_path='/etc/systemd/system'
remote_pubkey_location='https://keys.kto.black'
remote_pubkey='home.pub'

echo ""
echo "We're all good here!"
echo "You should now:"
echo "* lock root account"
echo "* copy your SSH config file"
echo "* reboot the SBC"
echo "And perhaps:"
echo "* set a new password for $user"
echo "* set htop at your convenience"
echo "* remove password for sudo" # TODO we should automate that, with a flag
exit 0