#!/usr/bin/env bash

# check if root
if [[ $EUID -ne 0 ]]; then
    echo "This script must be run as root" 1>&2
    exit 1
fi

# check if debian
if [ ! "$(grep -Ei 'debian|buntu' /etc/*release)" ]; then
    echo "This script must be run on a debian system" 1>&2
    exit 1
fi

# update system
apt-get update -y
apt-get dist-upgrade -y
apt-get autoclean -y

# get users directory
root_user_path=$(grep ':0:' /etc/passwd | awk -F':' '{print $6}')
default_user_path=$(egrep '\:100[0-9]\:' /etc/passwd | tail -n 1 | awk -F':' '{print $6}')
default_user=$(egrep '\:100[0-9]\:' /etc/passwd | tail -n 1 | awk -F':' '{print $1}')

# default shell
apt-get install -y sudo mc tree pv vim bash-completion

# zsh shell
apt-get install -y zsh && (
    sed -i -- 's/\/bin\/bash/\/bin\/zsh/' /etc/passwd
    wget -O /etc/zsh/newuser.zshrc.recommended \
            http://git.grml.org/f/grml-etc-core/etc/zsh/zshrc
    cp -f /etc/zsh/newuser.zshrc.recommended ${default_user_path}/.zshrc
    cp -f /etc/zsh/newuser.zshrc.recommended ${root_user_path}/.zshrc
)

# add tmux auto start
apt-get install -y tmux && (
    echo 'if [ "$TMUX" = "" ]; then tmux; fi' | cat - ${default_user_path}/.zshrc > \
        /tmp/.zshrc && mv /tmp/.zshrc ${default_user_path}/.zshrc
)

# diagnostics
apt-get install -y htop iotop iftop nmon powertop stress lm-sensors \
                   gddrescue smartmontools kpartx nmap

# programming
apt-get install -y git build-essential

# networking
apt-get install -y axel wget ethtool fping

# misc. tools
apt-get install -y apt-file aptitude hexedit manpages-de

# configure vim
touch ${root_user_path}/.vimrc ${default_user_path}/.vimrc
for config in "filetype plugin indent on" "set tabstop=4" "set shiftwidth=4" \
              "set expandtab" "syntax enable" "set softtabstop=4" \
              "set number" "set showcmd" "set cursorline"; do
    grep "$config" ${root_user_path}/.vimrc || echo "$config" >> ${root_user_path}/.vimrc
    grep "$config" ${default_user_path}/.vimrc || echo "$config" >> ${default_user_path}/.vimrc
done

# configure user files
chown ${default_user}:${default_user} ${default_user_path}/.vimrc ${default_user_path}/.zshrc

# configure tmux
cat > /etc/tmux.conf <<EOL
bind '"' split-window -c "#{pane_current_path}"
bind % split-window -h -c "#{pane_current_path}"
bind c new-window -c "#{pane_current_path}"
EOL

# configure system
apt-get install -y console-data console-setup locales \
                   keyboard-configuration tzdata
dpkg-reconfigure console-data console-setup locales \
                 keyboard-configuration tzdata

# run programs
apt-file update
sensors-detect --auto