#!/bin/bash

MY_PATH="`dirname \"$0\"`"              # relative
MY_PATH="`( cd \"$MY_PATH\" && pwd )`"  # absolutized and normalized

### Vars
args=$(echo $@  | tr " " "\n")

if [[ "$args" =~ "DOMAIN=" ]]; then
	DOMAIN=$(echo "$args" | grep "\<DOMAIN=" | awk -F '=' '{ print $2 }')
else
	echo "Veuillez sélectionner un domaine avec DOMAIN=mondommain.com"
	exit 1
fi
if [[ "$args" =~ "APP=" ]]; then
        APP=$(echo "$args" | grep "\<APP=" | awk -F '=' '{ print $2 }')
else
        echo "Veuillez sélectionner une application avec APP=monapp"
        exit 1
fi

action=$(echo "$args" | grep -v "=")
[[ ! $action =~ ^(on|off|certif)$ ]] && echo "Veuillez choisir on, off ou certif pour créer un certificat ssl" && exit 1
###

install_certbot(){
	sudo apt update
	if [[ $(grep -E 'stretch|buster' /etc/os-release) ]]; then
        sudo apt install certbot python-certbot-nginx  -y
	elif [[ $(grep -E '16.|17.|18.|19.' /etc/os-release) ]]; then
		sudo apt install software-properties-common
		sudo add-apt-repository universe
		sudo add-apt-repository ppa:certbot/certbot
		sudo apt update
		sudo apt install certbot python-certbot-nginx
	else
		echo "OS non supporté pour certbot." && exit 1
	fi
}

create_certificate() {
	sudo certbot --nginx certonly --non-interactive --agree-tos -m $USER@$DOMAIN -d $DOMAIN && echo "Le certificat de $DOMAIN a bien été déployé" || echo "Une erreur s'est produite lors de la création du certificat SSL"

	## Cronification
	[[ ! -e /opt/scripts ]] && sudo mkdir /opt/scripts
	sudo cp $MY_PATH/templates/rproxy/ssl_renew.sh /opt/scripts/
	[[ -z $(sudo crontab -l | grep "/opt/scripts/ssl_renew.sh") ]] && (sudo crontab -l ; sudo echo "12 2 * * 1 /opt/scripts/ssl_renew.sh") | sudo crontab -u root -
}


case $action in
on)
	sudo sed -i 's/ #if/ if/g' /etc/nginx/conf.d/$APP.conf
	sudo sed -i 's/ #add/ add/g' /etc/nginx/conf.d/$APP.conf

	sudo sed -i "s/listen 443;/listen 443 ssl;/g" /etc/nginx/conf.d/$APP.conf
	[[ ! -d /etc/nginx/includes ]] && sudo mkdir /etc/nginx/includes
	sudo cp $MY_PATH/templates/rproxy/ssl.conf /etc/nginx/includes/
	sudo sed -i "/Content-Security-Policy/a \   include includes/ssl.conf;\n   ssl_certificate /etc/letsencrypt/live/$DOMAIN/fullchain.pem;\n   ssl_certificate_key /etc/letsencrypt/live/$DOMAIN/privkey.pem;" /etc/nginx/conf.d/$APP.conf
;;

off)
	sudo sed -i "s/ if/ #if/g" /etc/nginx/conf.d/$APP.conf
	sudo sed -i "s/ add/ #add/g" /etc/nginx/conf.d/$APP.conf

	sudo sed -i "/ssl.conf;/d" /etc/nginx/conf.d/$APP.conf
	sudo sed -i "/ssl_certificate/d" /etc/nginx/conf.d/$APP.conf
;;
certif)
	[[ ! $(which certbot) ]] && install_certbot
	if sudo test ! -f /etc/letsencrypt/live/$DOMAIN/fullchain.pem; then create_certificate; fi
;;

esac