#!/usr/bin/env bash
rf=`tput setaf 1`
rb=`tput setab 1`
gf=`tput setaf 2`
gb=`tput setab 2`
wf=`tput setaf 7`
wb=`tput setab 7`
yf=`tput setaf 3`
yb=`tput setab 3`
bf=`tput setaf 4`
bb=`tput setab 4`
blf=`tput setaf 0`
blb=`tput setab 0`
r=`tput sgr 0`

if [ "$1" == '' ]; then
  echo "${rb}${wf}Error: Chrome package not specified${r}"
  echo -e "type \"./GCPM --help\" for more options and usage\n  Google Chrome Portable Maker\n"
fi
if [[ $1 == *.deb ]] || [[ $1 == *.DEB ]]; then
  #Google chrome package passed
  if [ ! -e "$1" ]; then
    #statement
    echo "${rb}${wf}Error: Specified file "$1" does not exists${r}"
    echo -e "type \"./GCPM --help\" for more options and usage\n  Google Chrome Portable Maker\n"
    exit 2
  fi


  #Making folder for Portable google chrome
  name="ChromePortableGCPM"
  n=0
    while [[ -d "$name" ]]; do
      n=$((n+1))
      t="ChromePortableGCPM($n)"
      name="$t"
    done
  if [ ! -d "$name" ]; then
    mkdir $name
  fi

  #Extracting data form the package
  echo -e "\n${gf}${blb}Extracting data from package${r}\n"
  dpkg-deb -v --extract $1 "$name/temp"
  echo -e "\n${gf}${blb}Extraction Completed${r}\n"

  #moving chrome folder to data folder and renaming
  mv -v "$name/temp/opt/google/chrome" "$name"
  mv -v "$name/chrome" "$name/data"
  mv -v "$name/data/google-chrome" "$name/data/launcher"

  #deleting the temporary files
  echo -e "\n${gf}${blb}Deleting temporary files${r}\n"
  rm -rf -v "$name/temp"
  echo -e "\n${gf}${blb}Deleted temporary files${r}\n"

  #making the virtual home directory
  mkdir "$name/data/VHOME"

  #making desktop entry
  touch "$name/chromeGCPM.desktop"
  dpath="$name/chromeGCPM.desktop"
  #echo -n 'Exec=sh -c 'env HOME="$(dirname "$*")"/Data/VHOME "$(dirname "$*")"/Data/google-chrome' dummy %k' in
  #to the desktop Entry file
  {
    echo '[Desktop Entry]'
    echo 'Name=Chrome Portable'
    echo 'Type=Application'
    echo -n 'Exec=sh -c '
    echo -n ''"'"''
    echo -n 'rm -rf "$(dirname "$*")"/execute_this.sh; '
    echo -n 'if [ `stat -c %%a:%%u:%%g "$(dirname "$*")"/data/chrome-sandbox` != 4755:0:0 ]; then '
    echo -n  'echo '"'"'"'"'"'"'"'"
    echo -n   'BASEDIR="$(dirname "$0")"\n'
    echo -n   'sudo chown root:root $BASEDIR/data/chrome-sandbox\n'
    echo -n   'sudo chmod 4755 $BASEDIR/data/chrome-sandbox\n'
    echo -n   'rm -f $BASEDIR/execute_this.sh\n'
    echo -n   'env HOME=$BASEDIR/data/VHOME $BASEDIR/data/launcher >/dev/null 2>&1 &\n'
    echo -n   "'"'"'"'"'"'"'"
    echo -n    ' > "$(dirname "$*")"/execute_this.sh; '
    echo -n 'fi; '
    echo -n 'env HOME="$(dirname "$*")"/data/VHOME "$(dirname "$*")"/data/launcher'
    echo -n ''"'"''
    echo ' dummy %k'
    echo 'Icon=google-chrome'
  } >"$dpath"
    echo -e "\n${gf}${blb}Generated Virtual Home directory and chrome launcher${r}"
  #Execution Permisiion to desktop entry file
  chmod +x "$dpath"
  echo -e "\n${gf}${blb}Written to GCPM.desktop!${r}"
  #changing owner of chrome-sandbox
  echo -e "\n${gf}${blb}Please enter password, and make sure you are added in the sudoers file\n${r}"
  sudo chown root:root "$name/data/chrome-sandbox"
  sudo chmod 4755 "$name/data/chrome-sandbox"
  echo -e "\n${wf}${bb}Process Completed Successfully!\nNow you can launch google chrome from $name folder \nYou can move $name folder anywhere, it will still work${r}"
  echo -e "\n${rf}${wb}Note: Google Chrome will take 2-3 mins to start for the first time \n(Only for the first time,It will start immediately after this)${r}\n"
fi
if [ "$1" != '' ]; then
  if [[ "$1" == '--help' ]]; then
    echo -e "\nGoogle Chrome Portable maker\n"
    echo -e "It makes Chrome portable so that you can move it anywhere or browse this privately"
    echo -e "usage: ./GCPM [google-chrome *.deb package]"
    echo -e "Download Google Chrome package from https://www.google.com/chrome/"
    echo -e "Browse GCPM Github repository at https://github.com/shivamgoyal15/Google-Chrome-Portable-maker-for-linux\n"
    exit 12
  fi
  if [[ $1 != *deb ]] && [[ $1 != *DEB ]]; then
    echo "${rb}${wf}Error: Not a valid debian package passed${r}"
    echo -e "type \"./GCPM --help\" for more options and usage\n  Google Chrome Portable Maker\n"
    exit 1
  fi
fi