#!/bin/sh

vars="/home/pi/birdcam/vars"

gpiocmd="$(command -v gpio)"

if [ -z "$gpiocmd" ]; then
	echo "Command gpio missing, try to install ..."
	
	echo "Check internet connection ..."
	pingserver="$(cat $vars | grep pingserver | cut -d'=' -f2)"
	if ! ping -q -c1 $pingserver>/dev/null; then
		echo "No internet connection ..."
		exit 0
	fi
	
	wget https://project-downloads.drogon.net/wiringpi-latest.deb
	sudo dpkg -i wiringpi-latest.deb
	rm wiringpi-latest.deb

#	sudo apt update; sudo apt -y install wiringpi
	
	gpiocmd="$(command -v gpio)"
	if [ -z "$gpiocmd" ]; then
		echo "cannot install wiringpi, exiting ..."
		exit 0
	fi
fi

gpiopin_sw="$(cat $vars | grep gpio_sw | cut -d'=' -f2)"
gpiopin_led_r="$(cat $vars | grep gpio_led_r | cut -d'=' -f2)"
gpiopin_led_g="$(cat $vars | grep gpio_led_g | cut -d'=' -f2)"


cameracmd="$(cat $vars | grep camerash | cut -d'=' -f2)"

buttonpolling="$(cat $vars | grep buttonpolling | cut -d'=' -f2)"
buttontimeout="$(cat $vars | grep buttontimeout | cut -d'=' -f2)"
countermax="$(cat $vars | grep countermax | cut -d'=' -f2)"

$gpiocmd mode $gpiopin_led_g out
$gpiocmd write $gpiopin_led_g 0

while true; do

	counter="0"
	$gpiocmd mode $gpiopin_led_r out
	$gpiocmd write $gpiopin_led_g 1
	while [ "$($gpiocmd read $gpiopin_sw)" -eq "1" ] && [ "$counter" -lt "$countermax" ]; do
		counter="$((counter + 1))"
		#echo "$counter"
		sleep $buttonpolling
	done

	$gpiocmd write $gpiopin_led_g 0
	$gpiocmd mode $gpiopin_led_r in
	camname="$(cat $vars | grep camparamr | cut -d'=' -f2)"
	$cameracmd $camname &
	echo "$camname started!"
	sleep $buttontimeout

	counter="0"
	$gpiocmd mode $gpiopin_led_r out
	$gpiocmd write $gpiopin_led_g 1
	while [ "$($gpiocmd read $gpiopin_sw)" -eq "1" ] && [ "$counter" -lt "$countermax" ]; do
		counter="$((counter + 1))"
		#echo "$counter"
		sleep $buttonpolling
	done

	$gpiocmd write $gpiopin_led_g 0
	$gpiocmd mode $gpiopin_led_r in
	camname="$(cat $vars | grep camparam1 | cut -d'=' -f2)"
	$cameracmd $camname &
	echo "$camname started!"
	sleep $buttontimeout

	counter="0"
	$gpiocmd mode $gpiopin_led_r out
	$gpiocmd write $gpiopin_led_g 1
	while [ "$($gpiocmd read $gpiopin_sw)" -eq "1" ] && [ "$counter" -lt "$countermax" ]; do
		counter="$((counter + 1))"
		#echo "$counter"
		sleep $buttonpolling
	done
	
	$gpiocmd write $gpiopin_led_g 0
	$gpiocmd mode $gpiopin_led_r in
	camname="$(cat $vars | grep camparam2 | cut -d'=' -f2)"
	$cameracmd $camname &
	echo "$camname started!"
	sleep $buttontimeout

done