#!/bin/bash
#################################
#POWER MANAGEMENT INTERFACE FOR Z2
# -JAGSPH 2010 VERSION 0.11
# http://zipit.rootnexus.org/
# with help from #zipit irc.freenode.net
# rkdavis, mozzwald
#########
# Vars for LID
#
#SCREEN BRIGHTNESS
SCRB=500

#BATTERY POWERED SCREEN BRIGHTNESS
BTDISP=420

#KEY BRIGHTNESS (JUST LEAVE THEM OFF)
KEYB=0

#How fast do we check the lid open/close status
LIDTIME=2

####################################
#Vars for power management interface
#
#
#Read status with nubmers only
#This is now done in the loop function
#BATST="`cat /proc/apm | awk '{ print $7}'|  awk -F "" '{print $1$2}'`"
#
#
#Low Threshold
BATLT="46"
#Warning Threshold
BATWT="50"
#High Threshold
BATHT="80"
#Fully Charged on AC
FULLC="89"
#Polling Time
POLL=30
#Warned?
WARN=0
WARNS=0

function warning1 {
if [ "$WARN" -eq "1" ]; then
echo "Function warning1 Doing nothing"
else
xmessage -center "Power low; SHUTDOWN:$BATLT CUR:$BATST"
WARN=1
fi
}

function warning2 {
if [ "$WARNS" -eq "1" ]; then
echo "Function warning2 Doing nothing"
else
xmessage -center "Power low; Shutdown in 2 MIN; Save Work" &
WARNS=1
fi
}

function fullcharge {
echo Fully Charged Function
echo "#################################"
if [ "$BATST" -lt "$FULLC" ]; then
echo Charge is $BATST out of $FULLC
else
#echo $BATST greather than $FULLC
echo "FC: Fully Chared $BATST OF $FULLC"
fi
}


function batpower {
echo On battery power function
echo "#################################"
if [ "$BATST" -lt "$BATHT" ]; then
echo $BATST less than $BATHT
echo System Is Officially on battery power
else
#echo $BATST greather than $BATHT
#echo "System Is over the $BATHT Threshold"
echo "BAT: Charging over $BATST over $BATHT on AC Power"
#echo "Even though it may not be"
#echo "Since we cannot accurately calculate"
#echo "BP: $BATST of $BATHT Threshold"
fi
echo ""

}


function warn {
echo Warning Function
echo "#################################"
if [ "$BATST" -lt "$BATWT" ]; then
#echo $BATST less than $BATWT
echo Warning
echo System will shutdown at $BATLT
echo System is at $BATST
warning1 &
sleep 2
WARN=1
#xmessage -center "Power low; SHUTDOWN:$BATLT CUR:$BATST"
else
#echo $BATST greather than $BATWT
echo "WARN: $BATST of $BATWT Threshold"
fi
echo ""

}


function low {
echo Low Function
echo "#################################"
if [ "$BATST" -lt "$BATLT" ]; then
echo $BATST less than $BATLT
echo System shutdown in 120 Seconds
echo Save your work
warning2 &
sleep 5
WARNS=1
sleep 120 ; op shutdown
else
echo "LOW: $BATST above $BATLT Shutdown Threshold"
fi            
echo ""

}


function lid {
while true ; do
LID="`cat /proc/irq/162/spurious | grep count | awk '{ print $2}'`"
#echo $LID

rem=$(( $LID % 2 ))

if [ $rem -eq 0 ]
then
  echo "$LID is even number" 
  echo "According to this we should turn on the display.. right?"
#echo $SCRB > /sys/class/backlight/pwm-backlight.0/brightness
#echo $KEYB > /sys/class/backlight/pwm-backlight.1/brightness
disppwr
else
  echo "$LID is odd number"
echo "According to this we should turn off the display, right?"
echo 0 > /sys/class/backlight/pwm-backlight.1/brightness
echo 0 > /sys/class/backlight/pwm-backlight.0/brightness 
fi

sleep $LIDTIME
done
}

function poweredby {
while true ; do 
POWERED=`cat /sys/devices/platform/z2-battery/power_supply/Z2/status`
if [ "$POWERED" = "Charging" ]; then
echo "We are on AC $POWERED. So we do nothing"
else
echo "We are not on AC $POWERED. So we are entering the battery-daemon."
echo $BTDISP > /sys/class/backlight/pwm-backlight.0/brightness
BATST="`cat /proc/apm | awk '{ print $7}'|  awk -F "" '{print $1$2}'`"
echo "System is reporting "$BATST"% from /proc/apm"
clear;
low;
warn;
batpower;
fullcharge;
sleep $POLL
fi
sleep $POLL
done
}

function disppwr {
POWERED=`cat /sys/devices/platform/z2-battery/power_supply/Z2/status`
if [ "$POWERED" = "Charging" ]; then
echo $SCRB > /sys/class/backlight/pwm-backlight.0/brightness
else
echo $BTDISP > /sys/class/backlight/pwm-backlight.0/brightness
fi
}

function loop {
while true ; do
poweredby
sleep $POLL
done
}


#Entry Point
#############
#
#
#

lid &   #FORK()
sleep 1 #CHILL
loop;   #ENTER POWER MANAGEMENT DAEMON