#!/bin/sh
cd /var/irclogs/_esoteric

pasterandom() {
    if [ "$1" -gt 150 ]; then
        echo "No."
        exit
    fi
    for i in $(seq "$1"); do
        file=$(shuf -en 1 ????-??-??.txt)
        echo "$file:$(shuf -n 1 $file)"
    done | paste
}

if [ "$1" ]; then
    if expr "$1" + 0 >/dev/null 2>&1; then
        pasterandom "$1"
    else
        lines=$(grep -P -i -- "$1" ????-??-??.txt | head -n 301)
        {
            echo "$lines" | head -n 300
            [ $(echo "$lines" | wc -l) -eq 301 ] && echo "[too many lines; stopping]"
        } | paste
    fi
else
    pasterandom 40
fi