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

if [[ ! $(dpkg -l irssi 2> /dev/null | grep '^ii') ]]; then
	echo "Installing irssi..."
	sudo 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
echo -e "/network add -autosendcmd '/join #a2c.chat' Palomino.A2\n/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