#!/usr/bin/env bash

# shellcheck shell=bash

# ``````````````````````````````````````````````````````````````````````````````
# Function name: CreateTorProcess()
#
# Description:
#   It creates tor processes.
#
# Usage:
#   CreateTorProcess "username" "num" "num"
#
# Examples:
#   CreateTorProcess ${user_name} ${socks_port_number} ${control_port_number}
#

function CreateTorProcess() {

  local _FUNCTION_ID="CreateTorProcess"
  local _STATE=0

  local _arg_uname="$1"
  local _arg_socks="$2"
  local _arg_control="$3"

  # shellcheck disable=SC2154
  local _proc_dir="${_multitor_directory}/${_arg_socks}"
  local _torrc_config="${_proc_dir}/${_arg_socks}.torrc"

  # shellcheck disable=SC2034
  local _tport_state=0

  # We create a directory for the new tor process.
  CreateTorDirectory

  # We save the hash of the password to the configuration file.
  # shellcheck disable=SC2154
  echo "HashedControlPassword ${_pass_hash}" > "${_torrc_config}"
  _kstate="$?"

  if [[ $_kstate -eq 0 ]] ; then

    _logger "info" \
      "${_FUNCTION_ID}()" \
      "saved HashedControlPassword correctly"

  else

    _logger "stop" \
      "${_FUNCTION_ID}()" \
      "not saved HashedControlPassword correctly"

  fi

  # shellcheck disable=SC2154
  chmod 0400 "${_torrc_config}" >>"$_log_stdout" 2>&1 && \
  chown "${_arg_uname}:${_arg_uname}" "${_torrc_config}" >>"$_log_stdout" 2>&1
  _kstate="$?"

  if [[ $_kstate -eq 0 ]] ; then

    _logger "info" \
      "${_FUNCTION_ID}()" \
      "change permission and owner correctly"

  else

    _logger "stop" \
      "${_FUNCTION_ID}()" \
      "not changed permission and owner correctly"

  fi

  # shellcheck disable=SC2024
  sudo -u "$_arg_uname" tor -f "${_torrc_config}" \
       --RunAsDaemon 1 \
       --CookieAuthentication 0 \
       --SocksPort "$_arg_socks" \
       --ControlPort "$_arg_control" \
       --PidFile "${_proc_dir}/${_arg_socks}.pid" \
       --DataDirectory "${_proc_dir}" \
       --SocksBindAddress 127.0.0.1 \
       --NewCircuitPeriod 15 \
       --MaxCircuitDirtiness 15 \
       --NumEntryGuards 8 \
       --CircuitBuildTimeout 5 \
       --ExitRelay 0 \
       --RefuseUnknownExits 0 \
       --ClientOnly 1 \
       --StrictNodes 1 \
       --AllowSingleHopCircuits 1 \
       >>"$_log_stdout" 2>&1 ; _kstate="$?"

  if [[ $_kstate -eq 0 ]] ; then

    _logger "info" \
      "${_FUNCTION_ID}()" \
      "create process: '${_arg_socks}.pid'"

    _tor_processes_done=$((_tor_processes_done + 1))

  else

    _logger "warn" \
      "${_FUNCTION_ID}()" \
      "no process was created"

    _tor_processes_fail=$((_tor_processes_fail + 1))

  fi

  unset _kstate

  return $_STATE

}