#!/bin/bash

declare -A logins
declare -A order
declare -A sumtimes

ord=1
lname=""

last -R | sort |
egrep ^[a-z]+[[:space:]]+\(tty\)[0-9]+[^0-9]+[0-9]+[[:space:]]..:..[[:space:]]- > prijave.temp.bshshs
exec < prijave.temp.bshshs
while read line;
do
    ms=$(echo $line | cut -d' ' -f4)
    da=$(echo $line | cut -d' ' -f5)

    if [[ $ms == "Jan" ]]; then
        mi=1
    elif [[ $ms == "Feb" ]]; then
        mi=2
    elif [[ $ms == "Mar" ]]; then
        mi=3
    elif [[ $ms == "Apr" ]]; then
        mi=4
    elif [[ $ms == "May" ]]; then
        mi=5
    elif [[ $ms == "Jun" ]]; then
        mi=6
    elif [[ $ms == "Jul" ]]; then
        mi=7
    elif [[ $ms == "Aug" ]]; then
        mi=8
    elif [[ $ms == "Sep" ]]; then
        mi=9
    elif [[ $ms == "Oct" ]]; then
        mi=10
    elif [[ $ms == "Nov" ]]; then
        mi=11
    else
        mi=12
    fi

    if [[ $1 =~ ([0-9]+)[^0-9]([0-9]+) ]]
    then
        std=$((10#${BASH_REMATCH[1]}));
        stm=$((10#${BASH_REMATCH[2]}));

        if [[ $2 =~ ([0-9]+)[^0-9]([0-9]+) ]]
        then
            end=$((10#${BASH_REMATCH[1]}));
            enm=$((10#${BASH_REMATCH[2]}));
        else
            echo "Prosim vnesite datuma v enem izmed kompatibilnih formatov:  27.4. 6.5.; 14.04. 03.01; 15/01 5/6";
        exit;
        fi
    else
        echo "Prosim vnesite datuma v enem izmed kompatibilnih formatov:  27.4. 6.5.; 14.04. 03.01; 15/01 5/6";
        exit;
    fi

    if [[ $mi -gt $enm || $mi -lt $stm ]]; then
        continue
    elif [[ ($mi -eq $enm && $da -gt $end) || ($mi -eq $stm && $da -lt $std) ]]; then
        continue
    fi

    name=$( echo $line | cut -d' ' -f1 );
    time=$( echo $line | cut -d' ' -f9 );

    if [[ $lname != $name ]]; then
        order[$ord]=$name
        (( ord++ ))
    fi

    lname=$name

    if [[ ${logins[$name]} -gt 0 ]]; then
        (( logins[$name]++ ))
    else
        logins[$name]=1
    fi

    if [[ $time =~ \((([0-9]+)\+)+([0-9]+)[^0-9]([0-9]+)\) ]]
    then
        m=$(( 10#${BASH_REMATCH[2]}*60*24 + 10#${BASH_REMATCH[3]}*60 + 10#${BASH_REMATCH[4]} ));
    else
        h=$( echo ${time:1:5} | cut -d':' -f1 );
        h=$(( h = 10#$h*60 ))
        m=$( echo ${time:1:5} | cut -d':' -f2 );

        m=$(( 10#$h + 10#$m ))
    fi

    if [[ ${sumtimes[$name]} -gt 0 ]]; then
        (( sumtimes[$name] += $m ))
    else
        sumtimes[$name]=$m
    fi
done
rm prijave.temp.bshshs
(( ord-- ))
for i in $(seq 1 $ord)
do
    name=${order[$i]}

    m=${sumtimes[$name]}
    d=$(( $m/24/60 ))
    m=$(( $m-$d*24*60 ))
    h=$(( $m/60 ))
    m=$(( $m-$h*60 ))

    if [[ $d -eq 1 ]]; then
        days="dan"
    elif [[ $d -eq 2 ]]; then
        days="dneva"
    else
        days="dni"
    fi

    echo "$name ${logins[$name]}x $d $days $h:$m"
done