# Copyright 2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=7

inherit flag-o-matic strip-linguas toolchain-funcs

# Switches supported by extensions-patch
EXT_PATCH_FLAGS="alternatechannel graphtft naludump permashift pinplugin
				mainmenuhooks menuorg menuselection resumereset ttxtsubs"

# names of the use-flags
EXT_PATCH_FLAGS_RENAMED=""

# names ext-patch uses internally, here only used for maintainer checks
EXT_PATCH_FLAGS_RENAMED_EXT_NAME="bidi no_kbd sdnotify"

MY_PV="${PV%_p*}"
MY_P="${PN}-${MY_PV}"
S="${WORKDIR}/${MY_P}"

EXT_P="extpng-${P}-gentoo-edition-v1"

DESCRIPTION="Video Disk Recorder - turns a pc into a powerful set top box for DVB"
HOMEPAGE="http://www.tvdr.de/"
SRC_URI="ftp://ftp.tvdr.de/vdr/${MY_P}.tar.bz2
	mirror://gentoo/${EXT_P}.patch.bz2"

LICENSE="GPL-2+"
SLOT="0"
KEYWORDS="amd64 ~arm ~arm64 ~ppc x86"
IUSE="bidi debug keyboard html systemd vanilla ${EXT_PATCH_FLAGS} ${EXT_PATCH_FLAGS_RENAMED}"

COMMON_DEPEND="
	media-libs/libjpeg-turbo
	sys-libs/libcap
	>=media-libs/fontconfig-2.4.2
	>=media-libs/freetype-2"
DEPEND="${COMMON_DEPEND}
	>=virtual/linuxtv-dvb-headers-5.3"
RDEPEND="${COMMON_DEPEND}
	dev-lang/perl
	>=media-tv/gentoo-vdr-scripts-2.7
	media-fonts/corefonts
	bidi? ( dev-libs/fribidi )
	systemd? ( sys-apps/systemd )"
BDEPEND="sys-devel/gettext
	virtual/pkgconfig"

CONF_DIR="/etc/vdr"
CAP_FILE="${S}/capabilities.sh"
CAPS="# Capabilities of the vdr-executable for use by startscript etc."

pkg_setup() {
	use debug && append-flags -g

	PLUGIN_LIBDIR="/usr/$(get_libdir)/vdr/plugins"

	tc-export CC CXX AR
}

add_cap() {
	local arg
	for arg; do
		CAPS="${CAPS}\n${arg}=1"
	done
}

enable_patch() {
	local arg ARG_UPPER
	for arg; do
		ARG_UPPER=$(echo $arg | tr '[:lower:]' '[:upper:]')
		echo "${ARG_UPPER} = 1" >> Make.config || die "cannot write to Make.config"

		# codesnippet to bring the extpng defines into the vdr.pc CXXFLAGS CFLAGS
		echo "-DUSE_${ARG_UPPER}" >> "${T}"/defines.tmp || die "cannot write to defines.tmp"
		cat "${T}"/defines.tmp | tr \\\012 ' '  > "${T}"/defines.IUSE || die "cannot write to defines.tmp"
		export DEFINES_IUSE=$( cat "${T}"/defines.IUSE )
	done
}

extensions_add_make_conf() {
	# copy all ifdef for extensions-patch to Make.config
	sed -e '1,/need to touch the following:/d' \
		-e '/need to touch the following/,/^$/d' \
		Make.config.template >> Make.config || die "cannot write to Make.config"
}

extensions_all_defines() {
	# extract all possible settings for extensions-patch
	sed -e '/^#\?[A-Z].*= 1/!d' -e 's/^#\?//' -e 's/ .*//' \
		Make.config.template \
		| sort \
		| tr '[:upper:]' '[:lower:]' || die "error in function extensions_all_defines"
}

lang_po() {
	LING_PO=$( ls "${S}"/po | sed -e "s:.po::g" | cut -d_ -f1 | tr \\\012 ' ' )
}

src_configure() {
	# support languages, written from right to left
	export "BIDI=$(usex bidi 1 0)"
	# systemd notification support
	export "SDNOTIFY=$(usex systemd 1 0)"
	# with/without keyboard
	export "USE_KBD=$(usex keyboard 1 0)"
}

src_prepare() {
	# apply maintenance-patches
	ebegin "Changing paths for gentoo"

	local DVBDIR="/usr/include"
	local i
	for i in ${DVB_HEADER_PATH} /usr/include/v4l-dvb-hg /usr/include; do
		[[ -d ${i} ]] || continue
		if [[ -f ${i}/linux/dvb/dmx.h ]]; then
			einfo "Found DVB header files in ${i}"
			DVBDIR="${i}"
			break
		fi
	done

	# checking for s2api headers
	local api_version
	api_version=$(awk -F' ' '/define DVB_API_VERSION / {print $3}' "${DVBDIR}"/linux/dvb/version.h)
	api_version=${api_version}*$(awk -F' ' '/define DVB_API_VERSION_MINOR / {print $3}' "${DVBDIR}"/linux/dvb/version.h)

	if [[ ${api_version:-0} -lt 5*3 ]]; then
		eerror "DVB header files do not contain s2api support or too old for ${P}"
		eerror "You cannot compile VDR against old dvb-header"
		die "DVB headers too old"
	fi

	cat > Make.config <<-EOT || die "cannot write to Make.config"
		#
		# Generated by ebuild ${PF}
		#
		PREFIX			= /usr
		DVBDIR			= ${DVBDIR}
		PLUGINLIBDIR	= ${PLUGIN_LIBDIR}
		CONFDIR			= ${CONF_DIR}
		VIDEODIR		= /var/vdr/video
		LOCDIR			= \$(PREFIX)/share/locale
		INCDIR			= \$(PREFIX)/include

		DEFINES			+= -DCONFDIR=\"\$(CONFDIR)\"
		INCLUDES		+= -I\$(DVBDIR)

		# >=vdr-1.7.36-r1; parameter only used for compiletime on vdr
		# PLUGINLIBDIR (plugin Makefile old) = LIBDIR (plugin Makefile new)
		LIBDIR			= ${PLUGIN_LIBDIR}
		PCDIR			= /usr/$(get_libdir)/pkgconfig

	EOT
	eend 0

	# wrt bug 586070
	if has_version ">=sys-apps/systemd-230"; then
		sed -e "s:libsystemd-daemon:libsystemd:g" -i Makefile || die "sed libsystemd failed"
	fi

	if ! use vanilla; then

		# Now apply extensions patch
		eapply "${WORKDIR}/${EXT_P}.patch"
		sed -e 's/PERMASHIFT_V1/PERMASHIFT/g' -i "${S}"/*.[ch] "${S}"/Make.config* || die "sed failed"

		# This allows us to start even if some plugin does not exist
		# or is not loadable.
		enable_patch PLUGINMISSING

		if [[ -n ${VDR_MAINTAINER_MODE} ]]; then
			einfo "Doing maintainer checks:"

			# we do not support these patches
			# (or have them already hard enabled)
			local IGNORE_PATCHES="pluginmissing"

			extensions_all_defines > "${T}"/new.IUSE || die "cannot write to new.IUSE"
			echo $EXT_PATCH_FLAGS $EXT_PATCH_FLAGS_RENAMED_EXT_NAME \
					$IGNORE_PATCHES | \
				tr ' ' '\n' |sort > "${T}"/old.IUSE || die "cannot write to old.IUSE"
			local DIFFS=$(diff -u "${T}"/old.IUSE "${T}"/new.IUSE|grep '^[+-][^+-]')
			if [[ -z ${DIFFS} ]]; then
				einfo "EXT_PATCH_FLAGS are up to date."
			else
				ewarn "IUSE differences!"
				local diff
				for diff in $DIFFS; do
					ewarn "$diff"
				done
			fi
		fi

		ebegin "Enabling selected patches"
		local flag
		for flag in $EXT_PATCH_FLAGS; do
			use $flag && enable_patch ${flag}
		done

		eend 0

		extensions_add_make_conf

		# add defined use-flags compile options to vdr.pc
		sed -e "s:\$(CDEFINES) \$(CINCLUDES) \$(HDRDIR):\$(CDEFINES) \$(CINCLUDES) \$(HDRDIR) \$(DEFINES_IUSE):" \
			-i Makefile || die "sed fails on Makefile"

		ebegin "Make depend"
		emake .dependencies >/dev/null
		eend $? "make depend failed"

		eapply "${FILESDIR}/${P}_gcc7extpng.patch"
	fi

	eapply "${FILESDIR}/${P}_gcc11.patch"
	eapply "${FILESDIR}/${P}_gentoo.patch"
	eapply "${FILESDIR}/${P}_unsignedtosigned.patch"
	eapply "${FILESDIR}/${P}_glibc-2.24.patch"
	eapply "${FILESDIR}/${P}-jpeg-9c.patch"
	eapply "${FILESDIR}/${P}_glibc-2.31.patch"

	# fix some makefile issues
	sed -e "s:ifndef NO_KBD:ifeq (\$(USE_KBD),1):" \
		-e "s:ifdef BIDI:ifeq (\$(BIDI),1):" \
		-e "s:ifdef SDNOTIFY:ifeq (\$(SDNOTIFY),1):" \
		-i "${S}"/Makefile || die "sed fails on Makefile"

	eapply_user

	add_cap CAP_UTF8

	add_cap CAP_IRCTRL_RUNTIME_PARAM \
			CAP_VFAT_RUNTIME_PARAM \
			CAP_CHUID \
			CAP_SHUTDOWN_AUTO_RETRY

	echo -e ${CAPS} > "${CAP_FILE}"

	# LINGUAS support
	einfo "\n \t VDR supports the LINGUAS values"

	lang_po

	einfo "\t Please set one of this values in your sytem make.conf"
	einfo "\t LINGUAS=\"${LING_PO}\"\n"

	if [[ -z ${LINGUAS} ]]; then
		einfo "\n \t No values in LINGUAS="
		einfo "\t You will get only english text on OSD \n"
	fi

	strip-linguas ${LING_PO} en
}

src_install() {
	# trick makefile not to create a videodir by supplying it with an existing
	# directory
	emake install \
	VIDEODIR="/" \
	DESTDIR="${ED}" install

	keepdir "${PLUGIN_LIBDIR}"

	# backup for plugins they don't be able to create this dir
	keepdir "${CONF_DIR}"/plugins

	if use html; then
		local HTML_DOCS=( *.html )
	fi

	local DOCS=( MANUAL INSTALL README* HISTORY CONTRIBUTORS )

	einstalldocs

	insinto /usr/share/vdr
	doins "${CAP_FILE}"

	if use alternatechannel; then
		insinto /etc/vdr
		doins "${FILESDIR}"/channel_alternative.conf
	fi

	chown -R vdr:vdr "${ED}/${CONF_DIR}" || die "chown failed"
}

pkg_postinst() {

	elog "\n\t---- 15 YEARS ANNIVERSARY EDITON ----\n"
	elog "\tA lot of thanks to Klaus Schmidinger"
	elog "\tfor this nice piece of Software...\n"

	elog "It is a good idea to run vdrplugin-rebuild now."

	elog "To get nice symbols in OSD we recommend to install"
	elog "\t1. emerge media-fonts/vdrsymbols-ttf"
	elog "\t2. select font VDRSymbolsSans in Setup"
	elog ""
	elog "To get an idea how to proceed now, have a look at our vdr-guide:"
	elog "\thttps://wiki.gentoo.org/wiki/VDR"
}