#!/bin/bash

# https://stackoverflow.com/a/246128
SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
. $SCRIPT_DIR/utils.sh

# https://unix.stackexchange.com/questions/66766/float-operation-with-bc
# https://unix.stackexchange.com/questions/89712/how-to-convert-floating-point-number-to-integer
# xargs: https://stackoverflow.com/questions/19148370/piping-seq-to-printf-for-number-formatting
divideint () {
    if [ -z $3 ]; then
        local scale=2
    else
        local scale=$3
    fi
    bc <<< "scale=$scale; $1/$2" | xargs printf "%.0f\n"
}

multiint () {
    bc <<< "scale=2; $1*$2" | xargs printf "%.0f\n"
}

divide () {
    if [ -z $3 ]; then
        local scale=2
    else
        local scale=$3
    fi
    bc <<< "scale=$scale; $1/$2"
}

multiply () {
    if [ -z $3 ]; then
        local scale=2
    else
        local scale=$3
    fi
    bc <<< "scale=$scale; $1*$2"
}

avgoftwo () {
    local sum=$(bc <<< "$1+$2")
    divide $sum 2
}

max () {
    declare -a allnumbers
    for arg in "$@"; do
        if isarray $arg; then
            for elem in ${arg[@]}; do
                [[ $elem -eq $elem ]] && allnumbers+=($elem)
            done
        else
            [[ $arg -eq $arg ]] && allnumbers+=($arg)
        fi
    done
    max=${allnumbers[0]}
    for n in "${allnumbers[@]}"; do
        ((n > max)) && max=$n
    done
    echo $max
}

min () {
    declare -a allnumbers
    for arg in "$@"; do
        if isarray $arg; then
            for elem in ${arg[@]}; do
                [[ $elem -eq $elem ]] && allnumbers+=($elem)
            done
        else
            [[ $arg -eq $arg ]] && allnumbers+=($arg)
        fi
    done
    min=${allnumbers[0]}
    for n in "${allnumbers[@]}"; do
        ((n < min)) && min=$n
    done
    echo $min
}