#!/bin/bash
# -*- bash -*-

: << =cut

=head1 NAME

ina219 - Plugin to measure power consumption.

=head1 NOTES

=head1 AUTHOR

Contributed by Florian Klemenz

=head1 LICENSE

GPLv2

=head1 MAGIC MARKERS

 #%# family=auto
 #%# capabilities=autoconf

=cut

. $MUNIN_LIBDIR/plugins/plugin.sh

if [ "$1" = "autoconf" ]; then
        echo yes
        exit 0
fi

if [ "$1" = "config" ]; then
        echo 'graph_title Power'
        echo 'graph_args --base 1 -l 0 '
        echo 'graph_scale no'
        echo 'graph_vlabel mW'
        echo 'graph_category power'
        echo 'power.label power'
        echo 'power.draw LINE'
        print_warning power
        print_critical power
        exit 0
fi

ROUNDS=3

VOLTAGE=0
CURRENT=0
POWER=0

for i in $(seq ${ROUNDS}); do
    #ROW="12204mV  184.3mA"
    ROW=$(/usr/bin/ina219)
    ENTRY=( $ROW )

    VOLTAGE_RAW=${ENTRY[0]%mV}
    CURRENT_RAW=${ENTRY[1]%mA}
    #echo "Voltage: ${VOLTAGE_RAW}"
    #echo "Current: ${CURRENT_RAW}"

    VOLTAGE=$(echo "scale=3; $VOLTAGE+$VOLTAGE_RAW" | /usr/bin/bc)
    CURRENT=$(echo "scale=3; $CURRENT+$CURRENT_RAW" | /usr/bin/bc)
done
#exit 1    
    
VOLTAGE=$(echo "scale=3; $VOLTAGE/$ROUNDS" | /usr/bin/bc)
CURRENT=$(echo "scale=3; $CURRENT/$ROUNDS" | /usr/bin/bc)
POWER=$(echo "scale=3; $VOLTAGE*$CURRENT/1000000" | /usr/bin/bc)


echo "power.value $POWER"