#!/bin/sh

# these variables can be overridden on commandline
WORKDIR="$(pwd)"
DESKTOPFILE="$WORKDIR/steam.desktop"
LAUNCHSTEAMDIR=${XDG_DATA_HOME:-~/.local/share}/Steam
LAUNCHSTEAMPLATFORM=ubuntu12_32
LAUNCHSTEAMBIN=$LAUNCHSTEAMDIR/$LAUNCHSTEAMPLATFORM
LAUNCHSTEAMBOOTSTRAP=$LAUNCHSTEAMDIR/steam.sh
LAUNCHSTEAMBOOTSTRAPFILE="$WORKDIR/bootstraplinux_$LAUNCHSTEAMPLATFORM.tar.xz"
EXELINK=~/.steampath # full path of steam (~/Steam/ubuntu12_32/steam)
STEAMROOTLINK=~/.steam/root # used by games to find the steam install directory (~/Steam)

if ! [ -x "$LAUNCHSTEAMBOOTSTRAP" ]; then
	# user does not have steam set up yet, do some sanity checks and set it up
	echo "Setting up steam platform in $LAUNCHSTEAMDIR"
	mkdir -p "$LAUNCHSTEAMDIR"
	cd "$LAUNCHSTEAMDIR"
	tar -xvJf "$LAUNCHSTEAMBOOTSTRAPFILE" ||
		{ echo "Failed to extract $LAUNCHSTEAMBOOTSTRAPFILE, aborting installation."
		exit 1 ;}

	# create the symlinks in the user's home directory
	[ -e ~/.steam ] || mkdir ~/.steam

	# copy steam bootstrap archive to STEAMROOT
	cp "${LAUNCHSTEAMBOOTSTRAPFILE}" "${LAUNCHSTEAMDIR}"/bootstrap.tar.xz
	
	rm -f ${EXELINK} && ln -s "${LAUNCHSTEAMBIN}"/steam ${EXELINK}
	rm -f ${STEAMROOTLINK} && ln -s "${LAUNCHSTEAMDIR}" ${STEAMROOTLINK}

	# put the Steam icon on the user's desktop
	# try to read ~/.config/user-dirs.dirs to get the current desktop directory
	# http://www.freedesktop.org/wiki/Software/xdg-user-dirs
	test -f ${XDG_CONFIG_HOME:-~/.config}/user-dirs.dirs && . ${XDG_CONFIG_HOME:-~/.config}/user-dirs.dirs
	DESKTOP_DIR=${XDG_DESKTOP_DIR:-$HOME/Desktop}
	
	cp "${DESKTOPFILE}" "${DESKTOP_DIR}"
	chmod +x "${DESKTOP_DIR}/steam.desktop"
fi

# go to the install directory and run the client
LAUNCHSTEAMDIR=`readlink -e $STEAMROOTLINK`
cd $LAUNCHSTEAMDIR
exec "$LAUNCHSTEAMDIR/steam.sh" $*