#!/bin/bash

SHUTTER=5
EFFECT=7
GREEN=13
RED=21

# Initialize GPIO states
gpio -g mode $SHUTTER up
gpio -g mode $EFFECT up
gpio -g mode $GREEN out
gpio -g mode $RED out

# Print welcome message on startup
stty -F /dev/ttyS0 9600
echo "Hi. Ready 4 Pics!" > /dev/ttyS0
echo " " > /dev/ttyS0
echo " " > /dev/ttyS0
gpio -g write $RED 0
gpio -g write $GREEN 0

# While Loop forever
while :
do
	# Check for shutter button
	if [ $(gpio -g read $SHUTTER) -eq 0 ]; then
	 	starttime=$(date +%s)
	 	# read how long shutter button was pressed
		while [ $(gpio -g read $SHUTTER) -eq 0 ]; do
			time=$(($(date +%s)-starttime))
			if [ $time -ge 3 ]; 
			then
				gpio -g write $RED 1
				gpio -g write $GREEN 1
			fi
		done
		
		# check how long button was pressed. mode select
		if [ $time -ge 3 ]; 
		then
			# longer than 3s
			# diagnostics
			HOST=$(hostname)
			IP=$(hostname -I | cut -d" " -f1)
			echo "$USER @ $HOST" > /dev/ttyS0
			echo "$IP" > /dev/ttyS0
			echo "$(df -h --output=size --output=avail --output=used --output=pcent /)" > /dev/ttyS0
			echo "$(du -h /home/pi/Pictures/)" > /dev/ttyS0
			echo "Pictures saved: $(ls /home/pi/Pictures/ | wc -l)" > /dev/ttyS0
			echo "Last: $(ls /home/pi/Pictures/ | tail -n 1)" > /dev/ttyS0
			echo " " > /dev/ttyS0
			echo " " > /dev/ttyS0
			gpio -g write $RED 0
			gpio -g write $GREEN 0
		else
			# shorter than 3s
			# picture mode
			gpio -g write $GREEN 1
			NAME=$(date '+%d.%m.%Y %H:%M:%S');
			FILE="/home/pi/Pictures/$NAME.jpg"
			if [ $(gpio -g read $EFFECT) -eq 1 ]; 
			then
				FX="none"
			else
				FX="sketch"
			fi
			# taking picture
			raspistill -n -br 60 -co 80 -sh 100 -ifx $FX -t 200 -w 512 -h 384 -o "$FILE"
			echo "saved $FILE"
			gpio -g write $GREEN 0
			# printing
			gpio -g write $RED 1
			if [ $FX == "none" ]
			then
				echo "$NAME" > /dev/ttyS0
			else
				echo "$NAME $FX" > /dev/ttyS0
			fi
      lp -o fit-to-page "$FILE"
      #sleep 10
      gpio -g write $RED 0
    fi
	fi
done

pi@PiInstant:~ $ ps aux | grep camera
root       362  4.8  0.3   1924  1156 ?        S    19:35   0:45 sh /home/pi/zj-58/extras/camera.sh
pi       13221  0.0  0.5   7332  2176 pts/0    S+   19:50   0:00 grep --color=auto camera
pi       16859 17.5  9.8  85192 37112 ?        Sl   19:40   1:48 geany /home/pi/zj-58/extras/camera.sh
pi@PiInstant:~ $ sudo kill -TERM 362
pi@PiInstant:~ $ ps aux | grep camera
pi       16559  0.0  0.5   7332  2032 pts/0    S+   19:51   0:00 grep --color=auto camera
pi       16859 15.9  9.8  85192 37112 ?        Sl   19:40   1:48 geany /home/pi/zj-58/extras/camera.sh