#!/bin/sh


#languages="C++
#Python
#TypeScript
#C
#Go
#Ruby
#PHP
#Racket"
#
#echo "$languages" | shuf | head -n5

prob="$1"
test -n "$prob" || { echo "Pass the problem number"; exit 1;}

lang_frek="$(find . -maxdepth 1 -mindepth 1 -not -path './.*' -type d \
    | parallel -j1 'find {} -maxdepth 1 -mindepth 1 -type f | wc -l | xargs echo {}' \
    | sort -k2)"

lest_amount="$(echo "$lang_frek" | head -n1 | cut -d' ' -f2)"

possibles="$(echo "$lang_frek" | grep "$lest_amount" | sed "s/ ${lest_amount}//g")"

chosen="$(echo "$possibles" | shuf | head -n1)"

newest_file="$(find "${chosen}" -type f -printf "%T@ %p\n" \
                 | sort -n \
                 | cut -d' ' -f 2- \
                 | tail -n 1)"

bn="$(basename "$newest_file")"
ext="$(echo "$bn" | cut -d'.' -f2)"

cp "$newest_file" "${chosen}/${prob}.${ext}"

echo "Language ${chosen}"
echo "File: '${chosen}/${prob}.${ext}'"