#! /bin/bash
# vim: set tabstop=4 shiftwidth=4 expandtab filetype=sh:

if [[ ! $(dpkg -l irssi 2> /dev/null | grep '^ii') ]]; then
    echo "Installing irssi..."
    supo apt-get -y update
    sudo apt-get -y install irssi &> /dev/null
    sudo apt-get -y clean
fi

if [[ $1 == "-n" && $2 ]]; then
    nickname=$2
elif [[ $1 == "-n" ]]; then
    nickname="0"
elif [[ -f ~/.irssi/a2c.nickname ]]; then
    nickname=$(cat ~/.irssi/a2c.nickname)
else
    nickname=
fi

while [[ ! $nickname || ! $(grep -i '^[a-z_\-\\^{}|`][a-z0-9_\-\\^{}|`]*$' <<< $nickname) ]]; do
    echo "Choosing a nickname"
    echo
    echo "A nickname on irc is how you are known to other people.  It can"
    echo "consist of letters, numbers, and punctuation symbols such as -, _, and ^."
    echo "Some older IRC servers will cut your nickname to eight characters, but"
    echo "more modern ones like A2Central do not."
    echo
    echo "Aliases are fine on irc, but really common names like James or Mark or"
    echo "AppleIIGuy are likely to be used by someone else already.  A guy named"
    echo "Joseph might use some variation of their name (such as JosephC or"
    echo "tjcarter) or come up with something else entirely."
    echo
    echo "You can change your nickname once you're online by typing a command"
    echo "like \"/nick <newnick>\", and you can rerun this script with the -n"
    echo "parameter to have this script save your choice for future use."
    echo
    echo -n "Enter a nickname (use 'a2chat -n' to change it later): "
    read
    nickname=$REPLY
done

mkdir -p ~/.irssi
echo $nickname > ~/.irssi/a2c.nickname

if [[ -f ~/.irssi/startup ]]; then
    mv ~/.irssi/startup ~/.irssi/startup.orig
fi
# SOME broken versions of bash have an intentionally broken
# echo -e for no justifiable reason.  Yes I mean YOU, Apple!
echo "/network add -autosendcmd '/join #a2c.chat' Palomino.A2
/server add -auto -network Palomino.A2 irc.a2central.com\n" > ~/.irssi/startup

if [[ -f ~/.irssi/config ]]; then
    cp ~/.irssi/config ~/.irssi/config.orig
fi

irssi -n $nickname

rm ~/.irssi/startup &> /dev/null
if [[ -f ~/.irssi/startup.orig ]]; then
    mv ~/.irssi/startup.orig ~/.irssi/startup
fi

rm ~/.irssi/config &> /dev/null
if [[ -f ~/.irssi/config.orig ]]; then
    mv ~/.irssi/config.orig ~/.irssi/config
fi