#!/usr/bin/env bash
# Pi-hole: A black hole for Internet advertisements
# (c) 2015, 2016 by Jacob Salmela
# Network-wide ad blocking via your Raspberry Pi
# http://pi-hole.net
# Calculates stats and displays to an LCD
#
# Pi-hole is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.


#Functions##############################################################################################################
piLog="/var/log/pihole.log"
gravity="/etc/pihole/gravity.list"

. /etc/pihole/setupVars.conf

# Borrowed/modified from https://gist.github.com/cjus/1047794
function GetJSONValue {
    retVal=$(echo $1 | sed 's/\\\\\//\//g' | \
                       sed 's/[{}]//g' | \
                       awk -v k="text" '{n=split($0,a,","); for (i=1; i<=n; i++) print a[i]}' | \
                       sed 's/\"\:/\|/g' | \
                       sed 's/[\,]/ /g' | \
                       sed 's/\"//g' | \
                       grep -w $2)
    echo ${retVal##*|}
}

outputJSON() {
	json=$(curl -s -X GET http://127.0.0.1/admin/api.php?summaryRaw)
	echo ${json}
}

normalChrono() {
	for (( ; ; )); do
		clear
		# Displays a colorful Pi-hole logo
		echo " ___ _     _        _"
		echo "| _ (_)___| |_  ___| |___"
		echo "|  _/ |___| ' \/ _ \ / -_)"
		echo "|_| |_|   |_||_\___/_\___|"
		echo ""
		echo "        ${IPV4_ADDRESS}"
		echo ""
		uptime | cut -d' ' -f11-
		#uptime -p	#Doesn't work on all versions of uptime
		uptime | awk -F'( |,|:)+' '{if ($7=="min") m=$6; else {if ($7~/^day/) {d=$6;h=$8;m=$9} else {h=$6;m=$7}}} {print d+0,"days,",h+0,"hours,",m+0,"minutes."}'
		echo "-------------------------------"
		# Uncomment to continually read the log file and display the current domain being blocked
		#tail -f /var/log/pihole.log | awk '/\/etc\/pihole\/gravity.list/ {if ($7 != "address" && $7 != "name" && $7 != "/etc/pihole/gravity.list") print $7; else;}'

		json=$(curl -s -X GET http://127.0.0.1/admin/api.php?summaryRaw)

    domains=$(printf "%'.f" $(GetJSONValue ${json} "domains_being_blocked")) #add commas in
    queries=$(printf "%'.f" $(GetJSONValue ${json} "dns_queries_today"))
    blocked=$(printf "%'.f" $(GetJSONValue ${json} "ads_blocked_today"))
    LC_NUMERIC=C percentage=$(printf "%0.2f\n" $(GetJSONValue ${json} "ads_percentage_today")) #2 decimal places

		echo "Blocking:      ${domains}"
		echo "Queries:       ${queries}"

		echo "Pi-holed:      ${blocked} (${percentage}%)"

		sleep 5
	done
}

displayHelp() {
	cat << EOM
::: Displays stats about your piHole!
:::
::: Usage: sudo pihole -c [optional:-j]
::: Note: If no option is passed, then stats are displayed on screen, updated every 5 seconds
:::
::: Options:
:::  -j, --json		output stats as JSON formatted string
:::  -h, --help		display this help text
EOM
    exit 0
}

if [[ $# = 0 ]]; then
	normalChrono
fi

for var in "$@"; do
	case "$var" in
		"-j" | "--json"  ) outputJSON;;
		"-h" | "--help"  ) displayHelp;;
		*                ) exit 1;;
	esac
done