#!/bin/sh

# I mean... this sucks, I get it - but sadly we have to use Wine for this
# because no one has made an installer extractor for Wine that works on
# Linux. Sorry.

# builds a pk3 file that's alphabetically sorted
mk_pk3()
{
	tree -fi > ./build_contents.txt
	sed -i '/build_contents/d' ./build_contents.txt
	sed -i '/directories,/d' ./build_contents.txt
	zip -0 "$1".pk3 -@ < ./build_contents.txt
	rm ./build_contents.txt
	mv "$1".pk3 ../"$1".pk3
}

SCRPATH="$( cd "$( dirname $(readlink -nf $0) )" && pwd )"
OUTPK3DIR="pak0_retail.pk3dir"

if ! [ -x "$(command -v wine)" ]; then
	printf "Error: wine is not installed.\n" >&2
	exit 1
fi

if ! [ $# -gt 0 ]; then
	printf "Path to MOUNTED CD-ROM folder, e.g. /mnt/cdrom:\n"
	read CDROM_PATH
else
	CDROM_PATH="$1"
fi

if ! [ -f "$CDROM_PATH"/rewolf/install.EXE ]; then
	printf "Error: install.EXE not found in $CDROM_PATH.\n" >&2
	exit 1
fi

# Set up a prefix that's 32-bit inside
export WINEPREFIX="${SCRPATH}/prefix"
export WINEARCH=win32
DATA_PATH="${WINEPREFIX}/drive_c/Sierra/Gunman/"

# No pak0 present
if ! [ -f "$SCRPATH/pak0_cd.pk3" ]; then
	# Check if we need to install the content, or throw a warning.
	if ! [ -f "$SCRPATH/$OUTPK3DIR/liblist.gam" ]; then
		# May already have been extracted here (debug)
		if ! [ -f "$DATA_PATH"/gunman.exe ]; then
			# Because /x does NOT preserve directories.
			wine "$CDROM_PATH"/rewolf/install.EXE /s
		fi

		# Move rewolf to become OUTPK3DIR
		mv "$DATA_PATH/rewolf" "$SCRPATH/$OUTPK3DIR"
		# Logos need to be in the game-dir
		mv "$DATA_PATH/logos" "$SCRPATH/$OUTPK3DIR/logos"
	else
		printf "$OUTPK3DIR already exists... everything okay?\n"
	fi

	# Make the pk3 archive
	cd "$SCRPATH/$OUTPK3DIR"
	mk_pk3 pak0_cd
fi

# Make sure we're back in here
cd "$SCRPATH"

# check if we need an icon.tga
if ! [ -f "$SCRPATH/icon.tga" ]; then
	# imagemagick will help us get our icon
	if [ -x "$(command -v convert)" ]; then
		printf "Detected ImageMagick's convert... giving you a nice icon!\n"
		convert "$DATA_PATH/rewolf.ico" "$SCRPATH/rewolf.tga"
		rm "$SCRPATH/rewolf-0.tga"
		mv "$SCRPATH/rewolf-1.tga" "$SCRPATH/icon.tga"
	else
		printf "No ImageMagick found... can't give you a window icon then.\n"
	fi
fi

# Make sure we're back in here
cd "$SCRPATH"

printf "All done. Would you like to rip the the Compact Disc Digital Audio for music?\ny/n: "
read CHOICE

if [[ "$CHOICE" == [Yy]* ]]; then
	# check if we require rippin tunes
	if ! [ -f "$SCRPATH/music/track02.wav" ]; then
		if [ -x "$(command -v cdparanoia)" ]; then
			mkdir -p "./music"
			cd "./music"
			cdparanoia -B
			rename ".cdda." "." *.wav

			# I'd offer FLAC, but that also requires the ffmpeg plugin
			if [ -x "$(command -v oggenc)" ]; then
				printf "All done. Would you like to convert them to OGG for playback compatibility\nas well as space preservation (frees up ~150 MB)?\ny/n: "
				read CHOICE
				if [[ "$CHOICE" == [Yy]* ]]; then
					oggenc *.wav
					rm *.wav
				fi
			fi
		else
			printf "cdparanoia is missing. Cannot rip music.\nPlease run the installer again once you've got it installed.\n"
		fi
	else
		printf "Music was already present.\n"
	fi
fi

cd "$SCRPATH"

# Be real careful here
rm -rfv "./$OUTPK3DIR"
rm -rfv "./prefix"