#!/bin/bash

NAME=$1
SERVER_IP=192.168.1.66
PORT=8080
USERNAME=admin
PASSWORD="123456"
CAMERAS="0 1 2 3 4 5 6 7 8"
SECONDS_PER_FILE=5

PIDFILE_BASE=/tmp/wget_script.$RANDOM.pids
if [ -z "$NAME" ]; then
	NAME=0
fi

SHUTDOWN_IN_PROGRESS="false"
quit() {
	if [ "$SHUTDOWN_IN_PROGRESS" == "false" ]; then
		SHUTDOWN_IN_PROGRESS="true"
		echo "quitting..."
		PIDS="$(cat ${PIDFILE_BASE}_A 2>/dev/null) $(cat ${PIDFILE_BASE}_B 2>/dev/null)"
		rm -f ${PIDFILE_BASE}_A ${PIDFILE_BASE}_B
		kill $PIDS 2>/dev/null || (echo "waiting for remaining proccesses..."; sleep 10; echo "killing remaining proccesses..."; kill -9 $PIDS 2>/dev/null)
		exit $1
	fi
}

trap 'quit 0' SIGINT SIGTERM EXIT

do_record() {
	for i in $CAMERAS; do
		echo "starting recording for camera $i" >&2
		(
			OUTFILE_START=dump_cam${i}_$(date +%s)
			wget --ignore-length --http-user=$USERNAME --http-passwd=$PASSWORD  http://${SERVER_IP}:$PORT/cam/$i/stream.mjpeg -O $OUTFILE_START -q 2>&1 >> /dev/null
			mv $OUTFILE_START OUTFILE_START_$(date +%s).mjpg
		) &
		WGET_PIDS="$WGET_PIDS $!"
	done

	echo "$WGET_PIDS" > ${PIDFILE_BASE}_${1}
	exit 0
}	

while true; do
	if [ ! -z "$PIDS_A" ]; then echo "killing group A"; kill -9 $PIDS_A 2>/dev/null; fi
	echo "starting group A"
	do_record A &
	PIDS_B="$(cat ${PIDFILE_BASE}_B 2>/dev/null)"
	if [ ! -z "$PIDS_B" ]; then echo "killing group B"; kill $PIDS_B 2>/dev/null; fi
	sleep $SECONDS_PER_FILE

	if [ ! -z "$PIDS_B" ]; then echo "killing group B"; kill -9 $PIDS_B 2>/dev/null; fi
	echo "starting group B"
	do_record B &
	PIDS_A="$(cat ${PIDFILE_BASE}_A 2>/dev/null)"
	if [ ! -z "$PIDS_A" ]; then echo "killing group A"; kill $PIDS_A 2>/dev/null; fi
	sleep $SECONDS_PER_FILE
done

quit 1