#!/bin/bash
#####################################
#####Colours######
ESC_SEQ="\x1b["
GREEN=$ESC_SEQ"32;01m"
RED=$ESC_SEQ"31;01m"
RESET=$ESC_SEQ"39;49;00m"
#####Underline/bold#####
BOLD=$ESC_SEQ"\033[1m"
bold=$(tput bold)
UNDERLINE=$ESC_SEQ"\033[4m"
#####################################
neat="############################################"
#####################################
#Load Average
# -o = 
# -h = 
# -e = pattern list. Specify one or more patters to be used during the search for input
loadnow=$(uptime | grep -ohe 'load average[s:][: ].*' | awk '{ print $3 }' | sed 's/,//');
load15=$(uptime | grep -ohe 'load average[s:][: ].*' | awk '{ print $5 }');

#Ram Usage
free=$(free -m | grep -ohe '-/+ buffers/cache[: ].*' | awk '{ print $4 }');
used=$(free -m | grep -ohe '-/+ buffers/cache[: ].*' | awk '{ print $3 }');
topramprocess=$(ps -Fe --sort:-rss --no-headers | head -1 | awk '{print $11}')
topramrss=$(ps -Fe --sort:-rss --no-headers | head -1 | awk '{print $6}')

#CPU Stuff
# old command topprocess=$(ps -eo user,pcpu,pid,cmd --no-headers | sort -r -k2 | head -1 | awk '{print $4}')
topprocess=$(ps -eo user,pcpu,pid,cmd --sort:-pcpu --no-headers | head -1 | awk '{print $4}' | sed 's/[][]//g' )
#topcpu=$(ps -eo user,pcpu,pid,cmd --no-headers | sort -r -k2 | head -1 | awk '{print $2}')
topcpu=$(ps -eo user,pcpu,pid,cmd --sort:-pcpu --no-headers | head -1 | awk '{print $2}')
#######################################

echo $neat
#echo -e $bold "bold test" $RESET

#####Load Average#####
echo ""
#1 min load check
loadcheck=$(echo $loadnow '<' 0.80 | bc -l )
    if [ "$loadcheck" -ge 1 ]; then
        echo -e "Load Average: Current$GREEN "$loadnow$RESET
    elif [ "$loadnow" -le 0 ]; then
        echo -e "Load Average: Current$RED "$loadnow$RESET
    fi

#15 min load check
loadcheck15=$(echo $load15 '<' 0.80 | bc -l )
    if [ "$loadcheck15" -ge 1 ]; then
        echo -e "Load Average: 15min Average$GREEN "$loadnow$RESET
    elif [ "$loadcheck15" -le 0 ]; then
        echo -e "Load Average: 15min Average$RED "$loadnow$RESET
    fi

echo ""

#####RAM#####
echo -e "Free Ram: "$free"MB" 
echo "Used RAM: "$used"MB"
#bc - the -l option will load the standard math library and default the scale to 20
#ramtest=$( printf "%.0f\n" $(bc -l <<< "100 - ($used / ( $free + $used) ) * 100 ") )
ramtest=$( printf "%.0f\n" $(bc -l <<< "100 - ($used / ( $free + $used) ) * 100 ") )
#ramtest=9
echo $ramtest"% ram left"
        if [ $ramtest -gt 20 ]; then
            echo -e "RAM Usage:$GREEN Acceptable$RESET"
        elif [ $ramtest -le 20 ] && [ $ramtest -gt 10 ] ; then
            echo -e "RAM ALERT:$RED Low!$RESET "
        elif [ $ramtest -le 10 ]; then
            echo -e "RAM WARNING:$RED CRITICAL STATE!!$RESET"
        fi
echo ""        
echo "TOP RAM CONSUMER: ""$topramprocess"
echo "It's RAM Usage (RSS): "$topramrss" bytes"


#####CPU#####
echo ""
echo "###CPU usage###"
echo -e "Top Process: " $UNDERLINE$topprocess$RESET
threads=$( ps afx | grep -v grep | grep -ic "$topprocess" )


cpucheck=$(echo $topcpu '<' 0.50 | bc -l )
    if [ "$cpucheck" -ge 1 ]; then
        echo -e "CPU % for SINGLE Top Process = " "$GREEN$topcpu$RESET"
    elif [ "$cpucheck" -le 0 ]; then
        echo -e "CPU % for SINGLE Top Process = " "$RED$topcpu$RESET"
    fi

echo -e "number of processes this is running: $UNDERLINE$threads$RESET"


#add all of the processes up and then print them:
totalcpu=$(ps aux | grep $topprocess | grep -v grep | awk '{total += $3}END{print total}')
#echo "cpu % for top process = " "$topcpu"
echo -e "cpu usage for all $UNDERLINE$topprocess$RESET processes"

totalcpucheck=$(echo $totalcpu '<' 0.7 | bc -l )
if [ "$totalcpucheck" -ge 1 ]; then
    echo -e "Total CPU % for Process = " "$GREEN$totalcpu$RESET"
elif [ "$totalcpucheck" -le 0 ]; then
    echo -e "Total CPU % for Process = " "$RED$totalcpu$RESET"
fi

#echo $totalcpu
echo ""

#echo "$threads $threadstest"
echo $neat
#######################################