#! /bin/sh

BASE=/tmp/p2

mkdir -p $BASE

if ! [ -f $BASE/nonce ]; then
    dd if=/dev/urandom count=1 | md5sum - > $BASE/nonce
fi
clear
read nonce < $BASE/nonce

newteam () {
    echo '== Team Creation =='
    echo
    echo -n 'What would you like your team to be called (3-12 chars)? '
    read -r name
    echo
    namelen=$(printf "%s" "$name" | wc -c)
    if [ $namelen -lt 3 ] || [ $namelen -gt 12 ]; then
        echo 'Invalid name length'
        return
    fi
    hash=$(printf '%s %s' "$nonce" "$name" | md5sum | cut -b 1-8)

    if [ -d $BASE/$hash ]; then
        echo "That name is already in use.  Try another one."
        return
    fi

    mkdir $BASE/$hash

    printf '%s' "$name" > $BASE/$hash/.name

    echo "Your team hash is $hash.  Write that down somewhere and don't lose it."
    echo "If you forget your hash, you'll have to start over from the beginning"
    echo "with a new team and everybody will laugh at you."
}

echo -n 'Team hash ("new" to create a new team): '
read -r hash
echo
if [ -z "$hash" ]; then
    exit 0
elif [ "$hash" = "new" ]; then
    newteam
elif ! [ -d $BASE/$hash ]; then
    echo "No such team, fool."
    echo "Is this when everybody laughs at you for forgetting your hash?"
else
    read -r name < $BASE/$hash/.name
    echo "Welcome $name"
    echo
    echo "Enter answer and I'll tell you if it's right or if you're a dummy."
    echo -n '> '
    read -r answer
    ahash=$(printf '%s' "$answer" | md5sum | cut -d' ' -f1)
fi

echo
echo "Press [Enter] to clear the screen."
read
exit 0