#!/bin/bash

set -euo pipefail

app_name=zen
literal_name_of_installation_directory=".tarball-installations"
universal_path_for_installation_directory="$HOME/$literal_name_of_installation_directory"
app_installation_directory="$universal_path_for_installation_directory/zen"
official_package_location="https://github.com/zen-browser/desktop/releases/latest/download/zen.linux-x86_64.tar.xz"
tar_location=$(mktemp /tmp/zen.XXXXXX.tar.xz)
open_tar_application_data_location="zen"
local_bin_path="$HOME/.local/bin"
local_application_path="$HOME/.local/share/applications"
app_bin_in_local_bin="$local_bin_path/$app_name"
desktop_in_local_applications="$local_application_path/$app_name.desktop"
icon_path="$app_installation_directory/browser/chrome/icons/default/default128.png"
executable_path=$app_installation_directory/zen

install() {
  echo "We're installing Zen, just chill and wait for the installation to complete!\n"
  echo "Downloading the latest package"
  curl -L --progress-bar -o $tar_location $official_package_location

  echo "Extracting Zen Browser..."
  tar -xvJf $tar_location

  echo "Untarred successfully!"

  echo "Checking to see if an older installation exists"
  remove

  if [ ! -d $universal_path_for_installation_directory ]; then
    echo "Creating the $universal_path_for_installation_directory directory for installation"
    mkdir $universal_path_for_installation_directory
  fi

  mv $open_tar_application_data_location $app_installation_directory

  echo "Zen successfully moved to your safe place!"

  rm $tar_location

  if [ ! -d $local_bin_path ]; then
    echo "$local_bin_path not found, creating it for you"
    mkdir $local_bin_path
  fi

  touch $app_bin_in_local_bin
  chmod u+x $app_bin_in_local_bin
  echo "#!/bin/bash
  $executable_path" >> $app_bin_in_local_bin

  echo "Created executable for your \$PATH if you ever need"

  if [ ! -d $local_application_path ]; then
    echo "Creating the $local_application_path directory for desktop file"
    mkdir $local_application_path
  fi


  touch $desktop_in_local_applications
  echo "
  [Desktop Entry]
  Name=Zen Browser
  Comment=Experience tranquillity while browsing the web without people tracking you!
  Keywords=web;browser;internet
  Exec=$executable_path %u
  Icon=$icon_path
  Terminal=false
  StartupNotify=true
  StartupWMClass=zen
  NoDisplay=false
  Type=Application
  MimeType=text/html;text/xml;application/xhtml+xml;application/vnd.mozilla.xul+xml;text/mml;x-scheme-handler/http;x-scheme-handler/https;
  Categories=Network;WebBrowser;
  Actions=new-window;new-private-window;profile-manager-window;
  [Desktop Action new-window]
  Name=Open a New Window
  Exec=$executable_path --new-window %u
  [Desktop Action new-private-window]
  Name=Open a New Private Window
  Exec=$executable_path --private-window %u
  [Desktop Action profile-manager-window]
  Name=Open the Profile Manager
  Exec=$executable_path --ProfileManager
  " >> $desktop_in_local_applications

  echo "Created desktop entry successfully"
  echo "Installation is successful"
  echo "Done, and done, have fun! 🐷"

  exit 0
}

parseTwilight() {
  if [ "${1:-}" == "--twilight" ]; then
    official_package_location="https://github.com/zen-browser/desktop/releases/download/twilight/zen.linux-x86_64.tar.xz"
    echo "You're currently in Twilight mode, this means you're downloading the latest experimental features and updates."
  fi
}

remove() {
  if [ -f "$app_bin_in_local_bin" ]; then
    echo "Old bin file detected, removing..."
    rm "$app_bin_in_local_bin"
  fi
  if [ -d "$app_installation_directory" ]; then
    echo "Old app files are found, removing..."
    rm -rf "$app_installation_directory"
  fi
  if [ -f "$desktop_in_local_applications" ]; then
    echo "Old desktop files are found, removing..."
    rm "$desktop_in_local_applications"
  fi
}

uninstall() {
  read -p "WARN: This will remove Zen Browser from your system. Do you wish to proceed? [y/N]: " confirm
  if [[ ! "$confirm" =~ ^[Yy]$ ]]; then
    echo "Nice save! We didn't remove Zen from your system."
    echo "Exiting..."
    exit 0
  fi
  echo "Uninstalling Zen Browser..."
  remove
  echo "Keeping your profile data will let you continue where you left off if you reinstall Zen later."
  read -p "Do you want to delete your Zen Profiles? This will remove all your bookmarks, history, and settings. [y/N]: " remove_profile
  if [[ "$remove_profile" =~ ^[Yy]$ ]]; then
    echo "Removing Zen Profiles data..."
    rm -rf "$HOME/.zen"
  else
    echo "Keeping Zen Profiles data..."
  fi
  echo "Zen Browser has been uninstalled."
  exit 0
}

echo -e "Welcome to Zen tarball installer!\n"
sleep 1

echo "What would you like to do?"
echo "1) Install/Update Zen Browser"
echo "2) Uninstall Zen Browser"
echo "3) Exit"
read -rn1 -p "Enter your choice [1/2/3]: " choice
echo

case $choice in
  1)
    parseTwilight "$@"
    install
    ;;
  2)
    uninstall
    ;;
  3)
    echo "Exiting... Bye! 🐷"
    exit 0
    ;;
  *)
    echo "Invalid choice. Exiting."
    exit 1
    ;;
esac