#!/bin/bash

function clear_maillogs {

cat /dev/null > $LOGS/mailfile.txt
cat /dev/null > $LOGS/worklog.txt
}
function fill_sender_recipients {
    echo "From: sender01@ppl33-35.net" 2>&1 | tee -a $LOGS/mailfile.txt
        echo "To: fys@ppl33-35.net, s.kudelin@ppl33-35.com" 2>&1 | tee -a $LOGS/mailfile.txt
        echo "Subject: rsync copy log" 2>&1 | tee -a $LOGS/mailfile.txt
        echo "" 2>&1 | tee -a $LOGS/mailfile.txt
}
function fill_checker_recipients {
    echo "From: checker01@ppl33-35.net" 2>&1 | tee -a $LOGS/mailfile.txt
        echo "To: fys@ppl33-35.net, s.kudelin@ppl33-35.com" 2>&1 | tee -a $LOGS/mailfile.txt
        echo "Subject: checker log" 2>&1 | tee -a $LOGS/mailfile.txt
        echo "" 2>&1 | tee -a $LOGS/mailfile.txt
}

function sender {
    SOURCE=/mnt/smb/online/
    TARGET=/mnt/storage/
    RSYNCLIST=/root/nas/logs/rsynclist.txt
    RSYNCLOGFILE=/root/nas/logs/rsynclogfile.txt
    LOGS=/root/nas/logs/

    cat /dev/null > $LOGS/mailfile.txt
    cat /dev/null > $LOGS/sender_worklog.txt
    cat /dev/null > $RSYNCLIST
    cat /dev/null > $RSYNCLOGFILE
    cat /dev/null > $LOGS/old_files_removed.txt
    fill_sender_recipients
    echo "Backup started at `date`" 2>&1 | tee -a $LOGS/sender_worklog.txt
    echo "" 2>&1 | tee -a $LOGS/sender_worklog.txt
    cd $SOURCE
    find . -mtime -2 -print | tee -a $RSYNCLIST
    rsync -av --ignore-existing --size-only --log-file=$RSYNCLOGFILE --files-from=$RSYNCLIST $SOURCE $TARGET

    ### DEBUG STARTED HERE ###

    MOUNTSTATUS=`systemctl is-active mnt-smb.mount`
    if [ "$MOUNTSTATUS" == "active" ]; then
        echo "" 2>&1 | tee -a $LOGS/debug.log
        echo "Debug mode enabled: smb is up" 2>&1 | tee -a $LOGS/debug.log
            echo "" 2>&1 | tee -a $LOGS/debug.log
    else [ "$MOUNTSTATUS" == "inactive" ];
            echo "Debug mode enabled: smb is down" 2>&1 | tee -a $LOGS/debug.log
            echo "" 2>&1 | tee -a $LOGS/debug.log
    fi

    ### DEBUG ENDED HERE ###

    find $TARGET -maxdepth 1 -mtime +14 -print -exec rm -rf {} \; > $LOGS/old_files_removed.txt
    cat $RSYNCLOGFILE >> $LOGS/sender_worklog.txt
    echo "" 2>&1 | tee -a $LOGS/sender_worklog.txt
    echo "Files below was removed due to expiration date (15 days keep)" 2>&1 | tee -a $LOGS/sender_worklog.txt
    cat $LOGS/old_files_removed.txt 2>&1 | tee -a $LOGS/sender_worklog.txt
    echo "" 2>&1 | tee -a $LOGS/sender_worklog.txt
    echo "Backup ended at `date`" 2>&1 | tee -a $LOGS/sender_worklog.txt
    cat $LOGS/sender_worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t

}

LOGS=/root/nas/logs/
clear_maillogs
MOUNTSTATUS=`systemctl is-active mnt-smb.mount`

echo "checker started at `date` and uptime is `uptime -p`" 2>&1 | tee -a $LOGS/worklog.txt
fill_checker_recipients

if [ "$MOUNTSTATUS" == "active" ]; then
    echo "" 2>&1 | tee -a $LOGS/worklog.txt
    echo "SMB Share seems UP: bypassing control to copy script" 2>&1 | tee -a $LOGS/worklog.txt
        echo "" 2>&1 | tee -a $LOGS/worklog.txt
    cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
    #call sender function
    sender
    CURRENTDAY=`date +%A`
    #clear logs before sending email
        clear_maillogs && fill_checker_recipients
    if [ "$CURRENTDAY" == "Tuesday" ]; then
        echo "Backup done, bypassing control at 11:00 tomorrow" 2>&1 | tee -a $LOGS/worklog.txt
        cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
        at -f /root/nas/waker.sh 11:00 tomorrow
    else
        echo "Backup done, bypassing control at 22:00 today" 2>&1 | tee -a $LOGS/worklog.txt
        cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
                at -f /root/nas/waker.sh 22:00 today
    fi

else [ "$MOUNTSTATUS" == "inactive" ];
    echo "SMB Share is unmounted, check it manually" 2>&1 | tee -a $LOGS/worklog.txt
    echo "" 2>&1 | tee -a $LOGS/worklog.txt
    clear_maillogs && fill_checker_recipients
    cat $LOGS/worklog.txt >> $LOGS/mailfile.txt && cat $LOGS/mailfile.txt | sendmail -t
fi