#!/bin/bash
version=1.0
function print_centered {
     [[ $# == 0 ]] && return 1
     declare -i TERM_COLS="$(tput cols)"
     declare -i str_len="${#1}"
     [[ $str_len -ge $TERM_COLS ]] && {
          echo "$1";
          return 0;
     }
     declare -i filler_len="$(( (TERM_COLS - str_len) / 2 ))"
     [[ $# -ge 2 ]] && ch="${2:0:1}" || ch=" "
     filler=""
     for (( i = 0; i < filler_len; i++ )); do
          filler="${filler}${ch}"
     done
     printf "%s%s%s" "$filler" "$1" "$filler"
     [[ $(( (TERM_COLS - str_len) % 2 )) -ne 0 ]] && printf "%s" "${ch}"
     printf "\n"
     return 0
}
function intro_ {
export TERM=xterm-256color
print_centered "$(tput setaf 2)"
print_centered " _ _ _ _                           _ "
print_centered "| | | |_|___ ___ ___ _ _ ___ ___ _| |"
print_centered "| | | | |  _| -_| . | | | .'|  _| . |"
print_centered "|_____|_|_| |___|_  |___|__,|_| |___|"
print_centered "                |___|                "
echo -n "$(tput sgr0)"
print_centered "Wireguard VPN serveur v$version"
print_centered ""
sleep 5
}

function install_ {
if grep "#net.ipv4.ip_forward=1" /etc/sysctl.conf >/dev/null
then
cp /etc/sysctl.conf /tmp/
chmod 777 /tmp/sysctl.conf
sed -i "s/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/g" /tmp/sysctl.conf
chmod 600 /tmp/sysctl.conf
sudo cp /tmp/sysctl.conf /etc/sysctl.conf
print_centered "Install sysctl.conf : [ OK ]"
fi
sudo apt install wireguard -y
echo ""
print_centered "Install soft   : [ OK ]"
sudo cp /Cloud/wireguard.tar.xz /
cd /
sudo tar xfJ wireguard.tar.xz
sudo rm wireguard.tar.xz
print_centered "Install config : [ OK ]"
sudo systemctl enable wg-quick@wg0.service
sudo systemctl start wg-quick@wg0.service
print_centered "Start software : [ OK ]"
}

intro_
install_