#!/bin/sh

# Script to set the self power-on feature under mythtv. 
# The script sets the alarm to either the next time to record
# or the next time mythfilldatabase runs in the evening.
# The script expects $1 to be the time in seconds from
# January 1, 1970, of the next recording or 0 if
# no next recording exists.

LOG=/var/log/mythtv/nextwakeup.log

# Time of next recording in seconds from January 1, 1970
NextRecording=$1

if [ $NextRecording -gt 0 ]
then
    echo "`date "+%c"`-MythTV reports the next recording time is `date -u -d "1970-01-01 $NextRecording secs" "+%c"`." >> $LOG
else
    echo "`date "+%c"`-MythTV reports no recording is scheduled." >> $LOG
fi

#Set the Time Zone
TZ=$(date +%z)

# Set Current Date
CurrDate=$(date +%s)

# Find next mythfilldatabase instance
if [ $CurrDate -lt $(date -d "02:55:00 $TZ" "+%s") ]
then
    NextMythfilldatabase=$(date -d "02:55:00 $TZ" "+%s")
else
    NextMythfilldatabase=$(date -d "+ 1 day 02:55:00 $TZ" "+%s")
fi

# echo "The next mythfilldatabase is $NextMythfilldatabase."

# Set set wakeup to the NextRecording or NextMythfilldatabase
if [ $NextRecording -gt 0 ] && [ $NextMythfilldatabase -gt $NextRecording ] 
then
    Wakeup=$NextRecording
else
    Wakeup=$NextMythfilldatabase
fi 

# mythshutdown --setwakeup `date -d "1970-01-01 $Wakeup secs" "+%FT%H:%M:%S"`

echo 0 > /sys/class/rtc/rtc0/wakealarm
echo $Wakeup > /sys/class/rtc/rtc0/wakealarm
RETVAL=$?

if [ $RETVAL ]
then
    echo "`date "+%c"`-Next wakeup time set to `date -u -d "1970-01-01 $Wakeup secs" "+%c"`." >> $LOG
    touch /var/run/alarmset
else
    echo "`date "+%c"`-Failed to set next wakeup time to `date -u -d "1970-01-01 $Wakeup secs" "+%c"`." >> $LOG
fi

exit $RETVAL