#!/bin/sh

nwn_datadir="%%NWNDATADIR%%"
nwn_clientdir="%%NWNCLIENTDIR%%"
nwn_userdir=${NWN_USERDIR:-"${HOME}/.nwn"}
nwn_moviedir="${nwn_userdir}/nwmovies"
lc_dirs="ambient data dmvault hak localvault music override portraits"

set -e

# Print arguments in lowercase
tolower() {
	set -e
	echo "$@" | tr '[:upper:]' '[:lower:]'
}

# Rename all files in a directory to lowercase
lowerdir() {
	set -e
	find "$@" -name '*[A-Z]*' | while read name ; do
		mv -v "${name}" "$(tolower ${name})"
	done
}

# Copy a directory structure and symlink its contents
copydir() {
	set -e
	cd "$1"
	find . -type d | cut -c 3- | while read dir ; do
		[ -d "${nwn_userdir}/${dir}" ] ||
			mkdir "${nwn_userdir}/${dir}"
	done
	find . -type l | cut -c 3- | while read file ; do
		[ -L "${nwn_userdir}/${file}" ] ||
			cp -R "${file}" "${nwn_userdir}/${file}"
	done
	find . -type f | cut -c 3- | while read file ; do
		[ -e "${nwn_userdir}/${file}" -o \
		-e "$(tolower ${nwn_userdir}/${file})" ] ||
			ln -s "${1}/${file}" "${nwn_userdir}/${file}"
	done
}

# Create user directory.  Will also update a user directory if anything is
# different due to running NWN with different versions of the game.
rebuilduserdir() {
	# Copy ${nwn_clientdir} first since it may contain files which
	# override parts of ${nwn_datadir}
	copydir "${nwn_clientdir}"
	copydir "${nwn_datadir}"

	# Some files need to have their names converted to lowercase.  Create
	# the directories if missing due to differences between versions of NWN.
	cd "${nwn_userdir}"
	mkdir -p ${lc_dirs}
	lowerdir ${lc_dirs}
}

if [ ! -d "${nwn_userdir}" ] ; then
	echo "Creating user directory"
	mkdir "${nwn_userdir}"

	# Copy the ini file so the user can tweak it
	cp "${nwn_clientdir}/nwn.ini" "${nwn_userdir}"

	# Create a non-empty CD key file to work around a bug in the
	# client: it will ask for the key twice if the file is
	# initally empty or missing
	echo '[CDKEY]' >"${nwn_userdir}/nwncdkey.ini"

	rebuilduserdir

	echo "Your Neverwinter Nights directory (~/.nwn) has now been"
	echo "created and populated.  Press ENTER to start the game."
	read dummy
else
	# Remove dead links from different versions (e.g., original versus
	# Diamond Edition) of NWN as they could confuse the game.
	find -L ${nwn_userdir} -type l -exec rm -- {} +

	rebuilduserdir
fi

echo "Saved games will be stored in ${nwn_userdir}/saves/"

cd "${nwn_userdir}"

# Remove old movie log file.
rm -f ${nwn_userdir}/nwmovies.log

# SDL settings
#
# - SDL_VIDEO_X11_XRANDR:  NWN shows a black screen when at the resolution of
#                          the monitor if it uses xrandr.  This is possibly only
#                          present with multiple monitors under Zaphod mode.
#                          Set SDL_VIDEO_X11_XRANDR=0 in the environment to work
#                          around this.
export SDL_MOUSE_RELATIVE=0
export SDL_VIDEO_X11_DGAMOUSE=0
export SDL_VIDEO_X11_XRANDR=${SDL_VIDEO_X11_XRANDR:-1}
export SDL_AUDIODRIVER=${SDL_AUDIODRIVER:-"dsp"}

# Library locations
export LD_LIBRARY_PATH="${nwn_userdir}/lib:${nwn_userdir}/miles"

# Prevent saving core files from NWN.
ulimit -c 0

echo "Starting Neverwinter Nights..."
if [ -e ${nwn_moviedir}/nwmovies.so ] ; then
	if [ ! -e ${nwn_userdir}/lib/libdisasm.so ]
	then
		# Needed for generation of nwmovies.ini.  Linked here since the
		# code calls dlopen() from the user directory.
		ln -sf ${nwn_moviedir}/libdis/libdisasm.so \
			${nwn_userdir}/lib/libdisasm.so
	fi

	export LD_PRELOAD=${nwn_moviedir}/nwmovies.so:/compat/linux/lib/libz.so.1
	export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:${nwn_moviedir}"

	# Support for newer nwmovies.so that can use an external application.
	# It requires LD_PRELOAD to be removed else the player will fail when it
	# attempts to preload any Linux libraries.  To make it easier, use a
	# script that removes it instead of changing the movie playing library.
	export NWMOVIES_PLAY_COMMAND="${nwn_userdir}/nwmovies.sh"
fi
./nwmain "${@}"