#!/bin/bash

# Verify pihole version (run pihole -v) and send a notfication to Gotify

italic="\033[3m"
underline="\033[4m"
ita_under="\033[3;4m"
bgd="\033[1;4;31m"
red="\033[1;31m"
green="\033[1;32m"
bold="\033[1m"
box="\033[1;41m"
reset="\033[0m"

export PATH="/usr/local/bin:$PATH"
# run by cron $PATH=/usr/bin:/bin

command -v pihole >/dev/null 2>&1 || { echo -e "${bold}pihole${reset} is not installed. Aborting..." >&2; exit 1; }

curl -Is https://www.apple.com | head -1 | grep 200 1>/dev/null
if [[ $? -eq 1 ]]; then
	echo -e "\n${red}No Internet connection !${reset}"
	echo -e "Exit !"
	exit 1
fi

host=$(hostname)
available=false
msg_md=
msg_html=
infos=
# Choose the notification
notif="pushover"

dotenv () {
  set -a
  # shellcheck disable=SC1091
  [ -f ".env" ] && . ".env" ||  echo -e "${red}\nNo .env file found ! No token for gotify.${reset}"
  set +a
}

dotenv

send_gotify_notification() {
	now=$(date +"%d-%m-%Y %T")
	gotify_server="https://gotify.maboiteverte.fr"
	TITLE="Pi-hole on $host update"
	MESSAGE="**A new version of Pi-hole is available:**\n\n $msg_md\n\n $infos\n\n Please run *pihole -up* on $host to update !"
	PRIORITY=8
	URL="$gotify_server/message?token=$token_gotify&?format=markdown"
	
	echo -e "Sending notification to $gotify_server ..."
	# -S, --show-error         Show error even when -s is used
	# -s, --silent             Silent mode
	# -v                       Verbose

	curl -s -S --output /dev/null --data '{"message": "'"${MESSAGE}"'", "title": "'"${TITLE}"'", "priority":'"${PRIORITY}"', "extras": {"client::display": {"contentType": "text/markdown"}}}' -H 'Content-Type: application/json' "$URL"

	[ $? -eq 0 ] && echo -e "${greenbold}Gotify notification sent successfully !${reset}" || echo -e "${redbold}error sending Gotify notification !${reset}"
}

send_pushover_notification() {
	echo -e "Sending Pushover notification ..."
    curl -s -F "token=$BASH_APP" \
    -F "user=$USER_KEY" \
    -F "title=$1" \
    -F priority=2 \
    -F html=1 \
    -F retry=60 \
    -F expire=86400 \
    -F "message=$2" https://api.pushover.net/1/messages.json
    
    [ $? -eq 0 ] && echo -e "${greenbold}Pushover notification sent successfully !${reset}" || echo -e "${redbold}error sending Pushover notification !${reset}"
}


echo -e "${box}Find Pi-hole update on $host${reset}\n"

upd=$(pihole -v)
#upd=$(cat 'update_pihole.txt')

printf " \e[1m%-10s \e[1m%-10s \e[1m%-10s \n" "Pi-hole" "Current" "Last"

while IFS= read -r line; do
				
	app=$(echo "${line}" | awk '{print $1}')	
	current=$(echo "${line}" | awk '{print $4}')	
	last=$(echo "${line}" | awk '{print $6}' | sed 's/.$//')
	
	if [ "$current" != "$last" ]; then
		printf " \e[1;31m%-10s\e[0m \e[1;31m%-10s\e[0m \e[1;31m%-10s\e[0m \n" "${app}" "${current}" "${last}"
		msg_md+="**${app}: current:${current} last:${last}**\n"
		msg_html+="${app}: current:${current} last:${last}<br />"
		available=true
		infos+="https://github.com/pi-hole/${app}/releases/tag/${last}\n"
	else
		printf " \e[1;32m%-10s\e[0m \e[1;32m%-10s\e[0m \e[1;32m%-10s\e[0m \n" "${app}" "${current}" "${last}"
		msg_md+="${app}: current:${current} last:${last}\n"
		msg_html+="${app}: current:${current} last:${last}<br />"
	fi
			
done <<< "$upd"

echo -e "\n$infos"

if [ ! "$available" = true ];then

	if [ -t 0 ]; then
		# "I'm on a TTY, this is interactive."
		a=$(echo -e "\nPlease run ${italic}pihole -up${reset} to update ! (y/n)")
		read -p "$a" choice
		if [ "$choice" == "y" ] || [ "$choice" == "Y" ]; then
			pihole -up
		fi
		
	else
		# Run by cron
		if [ "$notif" == "gotify" ];then
			send_gotify_notification
		elif  [ "$notif" == "pushover" ];then
			send_pushover_notification "A new version of Pi-hole is available" "$msg_html <br /> $infos <br /> Please run <b>pihole -up</b> on $host to update"
			#pushover -a "bash" -m "A new version of Pi-hole is available: <br /> $msg_html <br /> $infos <br /> Please run <b>pihole -up</b> on $host to update" -p 2 -f 1
		fi
	fi

else
	echo -e "\nNo available update !"
fi