export ZCALC_HISTFILE="${HOME}/.zcalc_history"

autoload -U zcalc

function __format_number() {
    local num="${1}"
    if [[ "${num}" =~ ^[-]?[0-9]+$ ]]; then
        LC_NUMERIC=en_US.UTF-8 printf "%'d\n" "${num}" | sed "s/,/_/g"
    else
        echo "${num}"
    fi
}

function __calc {
    # Получаем результат от zcalc
    local result
    result="$(ZDOTDIR="${HOME}" zcalc -f -e "$*" 2>/dev/null)"

    result="${result%.*}"
    if [[ "$result" =~ ^[-]?[0-9]+$ ]]; then
        __format_number "$result"
    else
        echo "$result"
    fi
}

aliases[calc]='noglob __calc'
aliases[=]='noglob __calc'


function accept-line() {
    if [[ ${BUFFER} =~ '^[ ]?\(?[-+]?[0-9]+[^a-zA-Z]+' ]]; then
        echo
        test "${BUFFER[1]}" != " " && print -S -- "${BUFFER}"  # saving the command to history
        __calc "${BUFFER}"
        BUFFER=
    fi

    zle .${WIDGET}
}

zle -N accept-line

# vim: ft=zsh