#!/bin/sh

CREDENTIALS="admin:password"
IP="192.168.1.1"

attempts=5
iter=1
SESSION_ID=""

while [ $iter -le 5 ]; do
    response=$(curl -s -u $CREDENTIALS http://{$IP}/LED_settings.htm)
    SESSION_ID=$(echo "$response" | grep -oP "(?<=led_settings.cgi\?id=)[0-9]+")
    if [ -n "$SESSION_ID" ]; then
        break
    else
        test_multiuser=$(echo "$response" | grep -o 'top.location.href = "MNU_access_multiLogin2.htm"')
        if [ -n "$test_multiuser" ]; then
            multi_session_id=$(curl -s -u $CREDENTIALS "http://${IP}/MNU_access_multiLogin2.htm" | grep -Po "(?<=multi_login.cgi\?id=)[0-9]+")
            curl -X POST --data "act=yes" -s -u $CREDENTIALS "http://${IP}/multi_login.cgi?id=$multi_session_id" >/dev/null
        fi
    fi
    sleep 1
    iter=$(( $iter + 1 ))
done

if [ -z "$SESSION_ID" ]; then
    echo "Failed to get session ID!" 1>&2
    exit 1
fi

mode="$1"

if [ "$mode" = "off" ]; then
    response=$(curl -s -X POST -u $CREDENTIALS --data "led_settings=turn_off" "http://${IP}/led_settings.cgi?id=${SESSION_ID}")
    success=$(echo "$response" | egrep -o '<INPUT name=led_now type=hidden value="turn_off" >')
    if [ -z "$success" ]; then
        echo "LED status change unsuccessful" 1>&2
        exit 1
    fi
elif [ "$mode" = "blink" ]; then
    response=$(curl -s -X POST -u $CREDENTIALS --data "led_settings=en_blink" "http://${IP}/led_settings.cgi?id=${SESSION_ID}")
    success=$(echo "$response" | egrep -o '<INPUT name=led_now type=hidden value="en_blink" >')
    if [ -z "$success" ]; then
        echo "LED status change unsuccessful" 1>&2
        exit 1
    fi
elif [ "$mode" = "noblink" ]; then
    response=$(curl -s -X POST -u $CREDENTIALS --data "led_settings=dis_blink" "http://${IP}/led_settings.cgi?id=${SESSION_ID}")
    success=$(echo "$response" | egrep -o '<INPUT name=led_now type=hidden value="dis_blink" >')
    if [ -z "$success" ]; then
        echo "LED status change unsuccessful" 1>&2
        exit 1
    fi
else
    echo "USAGE: $0 <off|blink|noblink>"
    exit 1
fi

exit 0