#!/bin/sh

# Script to upgrade/install the arc-theme

#URL
theme_name=arc-theme

# Theme name
download_url=https://github.com/horst3180/$theme_name/archive/master.tar.gz

# for test purporses only (the repo needs to have this script)
# download_url=https://github.com/leoheck/$theme_name/archive/master.tar.gz

# Tempdir
tempdir=/tmp/$theme_name

# Directories
lightdir=/usr/share/themes/Arc
darkerdir=/usr/share/themes/Arc-Darker
darkdir=/usr/share/themes/Arc-Dark

userlightdir=$HOME/.themes/Arc
userdarkerdir=$HOME/.themes/Arc-Darker
userdarkdir=$HOME/.themes/Arc-Dark

userlightdir2=$HOME/local/share/themes/Arc
userdarkerdir2=$HOME/local/share/themes/Arc-Darker
userdarkdir2=$HOME/local/share/themes/Arc-Dark

#Functions
show_error() {
printf "\033[1;31m$@\033[0m\n"
}

check_root() {
  if [ "$(id -u)" -ne 0 ]; then
    show_error "This script has to be run as root"
    echo
    exec sudo "$0" "$@" # Instead of exit, just re-execute as root
  fi
}

check_command() {
  fail=false

  for i in "$@"
  do
    command -v $i >/dev/null 2>&1 || { show_error >&2 "This script requires "$i" but it's not installed."; fail=true; }
  done

  if [ "$fail" = true ]; then
    echo
    echo "Aborting."
    echo
    exit 1;
  fi
}

check_directories() {
  dirfound=false

  echo "Checking if theme is installed..."
  echo

  for i in "$@"
  do
    if [ -d "$i" ]; then
      echo "Found $i"
      dirfound=true
    fi
  done

  if [ "$dirfound" = true ]; then
    echo
    echo "The above directories will be overwritten."
  fi

  if [ "$dirfound" = false ]; then
    echo "Theme is not installed."
  fi
}

install_theme() {
  # Clean tempdir
  rm -rf $tempdir && mkdir $tempdir && cd $tempdir

  # Get the sources && Remove current installation only if download and unpack are successful
  wget $download_url && tar xf master.tar.gz && rm -rf $lightdir $darkerdir $darkdir && cd "$theme_name"-master 

  # Build and install
  ./autogen.sh --prefix=/usr
  make install

  # Install this script
  if [ -f $(basename $0) ]; then
    if [ ! -f /usr/bin/$(basename $0) ]; then
      echo
      read -r -p "Do you like to install the $(basename $0) for future upgrades? [y/N] " response
      case $response in
        [yY][eE][sS]|[yY])
          echo "Installing $(basename $0) on /usr/bin/"
          cp -r arc-theme-upgrade /usr/bin/
          ;;
        *)
          echo "Aborted by user"
          exit 0;
        ;;
      esac
    else
      echo "Upgrading $(basename $0)"
      cp -f $(basename $0) /usr/bin/
    fi
  fi

  # Remove the sources
  rm -rf $tempdir

  echo
  echo "Installation complete."
}

# Main part
clear
echo '####################################'
echo '#     Arc Theme Install Script     #'
echo '####################################'
echo

#Check available commands
check_command automake wget pkg-config autoconf make tar

#Check if we are root
check_root

#Check if theme is installed
check_directories $lightdir $darkerdir $darkdir

echo
read -r -p "Do you want to continue installation? [y/N] " response
case $response in
  [yY][eE][sS]|[yY]) 
    install_theme
    ;;
  *)
    echo "Aborted by user"
    exit 0;
    ;;
esac
