# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

EAPI="2"
inherit eutils games

MY_PN="Wolf4SDL"

DESCRIPTION="Port of Wolfenstein 3D for SDL"
HOMEPAGE="http://www.stud.uni-karlsruhe.de/~uvaue/chaos/"
SRC_URI="http://www.stud.uni-karlsruhe.de/~uvaue/chaos/bins/Wolf4SDL-${PV}-src.zip"

LICENSE="as-is"
SLOT="0"
KEYWORDS="amd64 ~x86"
IUSE="smooth strafe ver_apogee ver_id +ver_shareware"

# joystick support is required for compilation; can this be patched out?
DEPEND="media-libs/libsdl[joystick]
	media-libs/sdl-mixer"
RDEPEND="${DEPEND}"

S="${WORKDIR}/${MY_PN}-${PV}-src"

pkg_setup() {
	# Validate USE flags
	if (use ver_shareware && use ver_apogee) \
		|| (use ver_shareware && use ver_id) \
		|| (use ver_apogee && use ver_id); then
		die "You must specify the USE flag for only one version of the game."
	elif ! use ver_shareware && ! use ver_apogee && ! use ver_id; then
		die "You must specify the USE flag for your version of the game."
	elif use smooth && ! use strafe; then
		die "You must enable the strafe USE flag in order to use smooth."
	fi
}

src_prepare() {
	# Wolf4SDL must be compiled based on version of game data
	# Use USE flags to determine version, with shareware as default
	# Note: In all cases this assumes you're using v1.4 (the final version)
	if use ver_shareware; then
		version="shareware"
		einfo "Configuring for $version version"
		sed -i -e 's;^\(#define GOODTIMES\);//\1;' \
			-e 's;^//\(#define UPLOAD\);\1;' version.h \
			|| die "configure version failed"
	elif use ver_apogee; then
		version="Apogee/3D Realms"
		einfo "Configuring for $version version"
		sed -i -e 's;^\(#define GOODTIMES\);//\1;' version.h \
			|| die "configure version failed"
	elif use ver_id; then
		version="ID/GT/Activision"
		einfo "Configuring for $version version"
	fi

	# Fix Linux compilation error
	einfo "Fixing GCC compilation errors"
	sed -i -e 's/open(filename, O_CREAT | O_WRONLY | O_BINARY);/open(filename, O_CREAT | O_WRONLY | O_BINARY, 0644);/' id_ca.cpp \
		|| die "GCC fix failed"

	# Apply patch to support per-user configuration files
	epatch "${FILESDIR}/configdir.patch" \
		|| die "configdir patch failed"

	# Apply patch to support auto-grabbing mouse in window mode
	epatch "${FILESDIR}/windowmouse.patch" \
		|| die "window mouse patch failed"

	# Apply patch to provide quake-style strafing
	if use strafe; then
		epatch "${FILESDIR}/strafe.patch" \
			|| die "strafe patch failed"

		# Apply patch to smooth gameplay experience, particularly mouse control
		if use smooth; then
			epatch "${FILESDIR}/smooth.patch" \
			|| die "smooth patch failed"
		fi
	fi
}

src_install() {
	local binary="wolf3d"
	insinto "${GAMES_DATADIR}/${PN}"
	exeinto "${GAMES_DATADIR}/${PN}" || die "binary installation failed"
	doexe $binary
	games_make_wrapper ${PN} "${GAMES_DATADIR}/${PN}/$binary" "${GAMES_DATADIR}/${PN}"

	doicon "${FILESDIR}/${PN}.xpm"
	make_desktop_entry ${PN} ${MY_PN} 

	prepgamesdirs
}

pkg_postinst() {
	games_pkg_postinst
	ewarn
	ewarn "Note: You must copy your game data files (*.wl6 or *.wl1) for the"
	ewarn "$version version to: ${GAMES_DATADIR}/${PN}"
	ewarn
	ewarn "Run '${PN} --help' for info regarding resolution and fullscreen settings."
}