#!/bin/bash

################################################################
# Script for manage your ProtonVPN connections (Dmenu VERSION) #
# Last change: 28-05-2022                                      #
# Author: q3aql                                                #
# Contact: q3aql@duck.com                                      #
# License: GPL v2.0                                            #
################################################################
VERSION="2.0"
M_DATE="280522"

# Variables
protonFiles="${HOME}/protonFiles"
url_download="https://account.protonvpn.com/downloads"
url_credentials="https://account.protonvpn.com/account#openvpn"
file_credentials="/opt/dmenu_protonvpn/proton-credentials.txt"
sed_file_credentials="\/opt\/dmenu_protonvpn\/proton-credentials.txt"
menu_files="/opt/dmenu_protonvpn/menu"

list_show_files() {
  echo "About"
  echo "Download ProtonVPN files"
  echo "Edit Credentials"
  if [ -d "${protonFiles}" ] ; then
    ls -1 "${protonFiles}/"
  fi
}

list_show_icons() {
  list_show_files | while read current_menu ; do
    if [ "${current_menu}" == "About" ] ; then
      echo "  ${current_menu}"
    elif [ "${current_menu}" == "Download ProtonVPN files" ] ; then
      echo "ﯲ  ${current_menu}"
    elif [ "${current_menu}" == "Edit Credentials" ] ; then
      echo "  ${current_menu}"
    else
      echo "  ${current_menu}"
    fi
  done
}

case "${TERM}" in
    xterm-color|*-256color) color_prompt=yes;;
esac
if [ "${color_prompt}" == "yes" ] ; then
  blue='\e[34m' ; red='\e[31m' ; yellow='\e[33m'
  purple='\e[35m' ; green='\e[32m' ; end='\e[0m'
else
  blue='' ; red='' ; yellow='' ; morado=''
  verde='' ; end=''
fi

if [ -f /usr/bin/kitty ] ; then
  termrun="kitty --title dmenu_proton -c=/opt/dmenu_protonvpn/config/kitty.conf -e" 
else
  xrdb -load /opt/dmenu_protonvpn/config/Xresources
  termrun="xterm -T dmenu_proton -e"  
fi

# Create proton-openvpn-files folder
mkdir -p ${protonFiles}

function openBrowser() {
  if [ -f /usr/bin/x-www-browser ] ; then
    /usr/bin/x-www-browser ${1} &
  else
    if [ -f /usr/bin/firefox ] ; then
      /usr/bin/firefox ${1}
    else
      if [ -f /usr/bin/brave-browser ] ; then
        /usr/bin/brave-browser ${1}
      else
        if [ -f /usr/bin/google-chrome ] ; then
          /usr/bin/google-chrome ${1} &
        fi
      fi
    fi
  fi
}

function insertCredentials() {
  if [ -f "${1}" ] ; then
    check_credentials=$(cat "${1}" | grep "auth-user-pass ${file_credentials}")
    if [ -z "${check_credentials}" ] ; then
     sed -i "s/auth-user-pass/auth-user-pass ${sed_file_credentials}/g" "${1}"  
    fi
  fi
}

function editCredentials() {
  user_openvpn=$(zenity --entry --title "dmenu_protonvpn ${VERSION} (${M_DATE})" \
--text "URL Credentials ${url_credentials}\n\nUser OpenVPN / IKEv2:" --entry-text "USER-HERE")
  pass_openvpn=$(zenity --entry --title "dmenu_protonvpn ${VERSION} (${M_DATE})" \
--text "URL Credentials ${url_credentials}\n\nPassword OpenVPN / IKEv2:" --entry-text "PASSWORD-HERE")
  if [ -z "${user_openvpn}" ] ; then
    echo "# User / Password canceled" 
  else
    echo "${user_openvpn}" > ${file_credentials}
    echo "${pass_openvpn}" >> ${file_credentials}
  fi
}

function checkFileCredentials() {
  check_file=$(cat ${file_credentials} 2> /dev/null | wc -l)
  if [ ${check_file} -ne 2 ] ; then
    editCredentials
  fi
}

function showAbout() {
  zenity --title "About" --window-icon=${iconPath} --info --width=330 \
  --text "Software: dmenu_protonvpn ${VERSION} (${M_DATE})\nAuthor: q3aql\nContact: q3aql@duck.com\nLicense: GPL v2.0"
}

function downloadProtonVPNFiles() {
  openBrowser "${url_download}"
  zenity --title "dmenu_protonvpn ${VERSION} (${M_DATE})" --window-icon=${iconPath} --info --width=400 \
  --text "* Steps for download .ovpn files:\n\n - Open URL: ${url_download}\n - Login with your Proton account\n - Click to Downloads > OpenVPN configuration files\n - Download .ovpn files and copy to ${HOME}/protonFiles\n"
}

list_output=$(list_show_icons | /opt/dmenu_protonvpn/dmenu "$@" -p "嬨  dmenu_protonvpn v${VERSION}")
run_output=$(echo "${list_output}" | cut -c4-999)
echo "${run_output} # Selected"
if [ "${run_output}" == "  About" ] ; then
  if [ -f /usr/bin/zenity ] ; then
    showAbout
  else
    echo ${termrun} ${menu_files}/about.sh
    ${termrun} ${menu_files}/about.sh
  fi
elif [ "${run_output}" == "  Download ProtonVPN files" ] ; then
  if [ -f /usr/bin/zenity ] ; then
    downloadProtonVPNFiles
  else
    echo ${termrun} "${menu_files}/download-protonvpn-files.sh"
    ${termrun} "${menu_files}/download-protonvpn-files.sh"
  fi
elif [ "${run_output}" == "  Edit Credentials" ] ; then
  if [ -f /usr/bin/zenity ] ; then
    editCredentials
  else
    echo ${termrun} "${menu_files}/edit-credentials.sh"
    ${termrun} "${menu_files}/edit-credentials.sh"
  fi
else
  if [ -z "${run_output}" ] ; then
    echo > /dev/null
  else
    if [ -f /usr/bin/sudo ] ; then
      run_output=$(echo ${run_output} | tr -s "  ")
      cp -rf ${protonFiles}/${run_output} /tmp/
      insertCredentials /tmp/${run_output}
      echo ""
      echo -e "${green}* Connecting using file ${end}${yellow}${protonFiles}/${run_output}${end}${purple}"
      ${termrun} sudo openvpn /tmp/${run_output}
      echo -e "${end}${red}* Connection closed${end}"
      echo -ne "${green}+ Press ${end}${purple}ENTER${end}${green} to return menu${end} " ; read return
    else
      run_output=$(echo ${run_output} | tr -s "  ")
      cp -rf ${protonFiles}/${run_output} /tmp/
      insertCredentials /tmp/${run_output}
      echo ""
      echo -e "${green}* Connecting using file ${end}${yellow}${protonFiles}/${run_output}${end}${purple}"
      ${termrun} su -c "openvpn /tmp/${run_output}"
      echo -e "${end}${red}* Connection closed${end}"
      echo -ne "${green}+ Press ${end}${purple}ENTER${end}${green} to return menu${end} " ; read return
    fi
  fi
fi