#!/bin/bash

while [ 1=1 ]; do # repeat forever

        clear

        echo "Updated: $(date '+%F %T')"

        echo "### TIME SECTION"

        SLEEP_H=18 # What hour should the system suspend at?
        WAKE_H=8 # What hour should the system wake up at?

        # check what day of the week it is now
        DOW=$(date +%w) #  1 = monday, 5 = friday etc.

        echo "Day of week: $DOW"

        # check what time is it now
        H=$(date +%H)
        M=$(date +%M)

        NOW_S=$(date +%s)

        echo "Hour: $H, minute: $M"

        #date +%s --date "tomorrow 8:00"

        if [[ $DOW -lt 5 ]]; then
                echo "It's Monday to Thursday!"
                WAKE="tomorrow $WAKE_H:00"
        else
                echo "It's Friday to Sunday!"
                WAKE="monday $WAKE_H:00"
        fi

        WAKE_S="$(date --date "$WAKE" +%s)"

        WAKE_SR=$(( $WAKE_S - $NOW_S))

        echo
        echo "Wake: $WAKE"
        echo "Wake relative seconds: $WAKE_SR"
        echo
        rtcwake -m no -s "$WAKE_SR"

        # sleep section

        sleep 15m

        echo "### SLEEP SECTION"

        if [[ $H -gt $SLEEP_H ]]; then # sleep if the hour is right
                systemctl suspend
                continue
        else
                echo "It's too early to sleep"
        fi

        if [[ $DOW -gt 5 ]]; then # sleep if it's saturday or sunday
                systemctl suspend
                continue
        else
                echo "It's not weekend - gotta stay up!"
        fi

done

sudo crontab -e

@reboot         exec /root/power-schedule.sh