#!/usr/bin/env bash

###
# Set variables
###
export DEBIAN_FRONTEND=noninteractive
DPKG_CFG_FRAGMENT=/etc/dpkg/dpkg.cfg.d/non-interactive

# Color of prefix (>>>) to distinguish user and root echos
color_prefix=32 # green

# Linux distro
script_distro='Linux Mint 19.x'

# Additional packages
packages=(
  # Graphics
  cheese
  inkscape

  # Office
  libreoffice

  # Security
  keepassxc

  # Games
  0ad
  beneath-a-steel-sky
  billard-gl
  blobby
  blockout2
  flight-of-the-amazon-queen
  freeciv
  frozen-bubble
  gbrainy
  gnome-games
  gweled
  hedgewars
  lincity-ng
  lure-of-the-temptress
  openttd
  pingus
  pipewalker
  pokerth
  supertux
  supertuxkart
  teeworlds
  wesnoth
  widelands

  # Gaming platforms
  playonlinux
  steam
  wine-stable
  winetricks

  # System management
  gparted

  # Tools
  hardinfo
  shutter
  vim

  # Management
  calibre

  # Media
  vlc

  # Knowledge
  goldendict
  ubuntu-edu-preschool
  ubuntu-edu-primary
  ubuntu-edu-secondary
  ubuntu-edu-tertiary

  # Language support
  language-selector-common
  openoffice.org-hyphenation
  language-pack-ar
  language-pack-gnome-ar
  language-pack-fa
  language-pack-gnome-fa
)

###
# Functions
###
is_root() {
  [[ $UID -eq 0 ]]
}

# $*: message to echo
e() {
  printf "\e[%sm>>>\e[0m %s\n" "$color_prefix" "$*"
}

# It's a pain to stop (ctrl+c, kill) execution with all the Python applications
# so we catch SIGINT and SIGTERM and exit immediately
handle_signal() {
  e "Ausführung abgebrochen! Script wird beendet..."
  exit 1
}

# always executed on shell exit regardless of reason. for cleanup tasks
handle_exit() {
  # Remove temporary dpkg cfg if root
  is_root && rm -f "$DPKG_CFG_FRAGMENT"
}

trap handle_signal SIGINT SIGTERM
trap handle_exit EXIT

pkg() {
  apt install "$@" --yes --quiet
}

###
# Root setup
###
if is_root; then
  color_prefix=31 # red
  if [[ $1 != "root-setup" ]]; then
    e "Dieses Script sollte nicht direkt als Root ausgeführt werden!" >&2
    e "Privilegien werden automatisch eskaliert sobald es notwendig ist." >&2
    exit 1
  fi

  # place temporary dpkg configurations to ensure non-interactive upgrade
  cat <<'DPKG' >"$DPKG_CFG_FRAGMENT"
force-confold
force-confdef
DPKG

  e "Automatische Installation empfohlener Pakete aktivieren ..."
  sed -i 's/false/true/g' /etc/apt/apt.conf.d/00recommends

  e "Besten Spiegelserver für '${script_distro}' auswählen ..."
  mint-switch-to-local-mirror

  e "Paketquellen aktualisieren ..."
  apt update --yes --quiet

  e "System aktualisieren (apt) ..."
  apt full-upgrade --yes --quiet

  e "System aktualisieren (mintupdate-cli) ..."
  mintupdate-cli --yes upgrade

  e "Proprietäre Treiber installieren (sofern verfügbar) ..."
  ubuntu-drivers autoinstall

  e "Zusätzliche Software installieren ..."
  pkg "${packages[@]}"

  e "Sprachunterstützung vervollständigen ..."
  pkg "$(check-language-support)"
  # these packages have to be installed after "$(check-language-support)"
  pkg hunspell-de-at hunspell-de-ch hunspell-de-de

  e "Unnötige Pakete entfernen und Cache bereinigen ..."
  apt clean --yes --quiet
  apt autoremove --yes --quiet

  e "Root Setup abgeschlossen."
  # It's very important to exit here. We don't want root past this point!
  exit
fi

###
# Greeting
###
echo "\
#####################################
# Computertruhe-Installationsskript #
#####################################

###
# Maintainer: Computertruhe e. V.
# Website:    https://computertruhe.de/
# Version:    0.2.0
# Repo:       https://codeberg.org/Computertruhe/computertruhe-setup
# Distro:     ${script_distro}
###
"
e "Starte initiales Setup für Rechner mit frisch installiertem '${script_distro}' ..."

###
# Automatic installation
###
e "Script wird als Root ausgeführt für privilegierte Aufgaben"
sudo ./"$0" root-setup

e "Richte arabisches und persisches Tastatur-Layout ein..."
gsettings set org.gnome.libgnomekbd.keyboard layouts "['de', 'ara', 'ir']"

e "Ändere Anzeigeoptionen für die Tastatur auf die richtigen Werte..."
gsettings set org.cinnamon.desktop.interface keyboard-layout-show-flags false
gsettings set org.cinnamon.desktop.interface keyboard-layout-use-upper true
gsettings set org.cinnamon.desktop.interface keyboard-layout-prefer-variant-names true

###
# Finalisation
###
e "Initiales Setup beendet."