# Copyright 2020-2022 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2

EAPI=8

PYTHON_COMPAT=( python3_{8..11} )

inherit xdg cmake python-any-r1 optfeature

DESCRIPTION="Official desktop client for Telegram"
HOMEPAGE="https://desktop.telegram.org"

MY_P="tdesktop-${PV}-full"
SRC_URI="https://github.com/telegramdesktop/tdesktop/releases/download/v${PV}/${MY_P}.tar.gz"
S="${WORKDIR}/${MY_P}"

LICENSE="BSD GPL-3-with-openssl-exception LGPL-2+"
SLOT="0"
KEYWORDS="~amd64 ~arm64 ~ppc64 ~riscv"
IUSE="+dbus enchant +hunspell +jemalloc screencast +spell qt6 wayland +X"
REQUIRED_USE="
	spell? (
		^^ ( enchant hunspell )
	)
"

RDEPEND="
	!net-im/telegram-desktop-bin
	app-arch/lz4:=
	dev-cpp/abseil-cpp:=
	dev-libs/libdispatch
	dev-libs/openssl:=
	dev-libs/xxhash
	media-fonts/open-sans
	media-libs/fontconfig:=
	~media-libs/libtgvoip-2.4.4_p20220503
	media-libs/openal
	media-libs/opus:=
	media-libs/rnnoise
	~media-libs/tg_owt-0_pre20220507[screencast=,X=]
	media-video/ffmpeg:=[opus]
	sys-libs/zlib:=[minizip]
	dbus? ( dev-cpp/glibmm:2 )
	enchant? ( app-text/enchant:= )
	hunspell? ( >=app-text/hunspell-1.7:= )
	jemalloc? ( dev-libs/jemalloc:=[-lazy-lock] )
	!qt6? (
		>=dev-qt/qtcore-5.15:5
		>=dev-qt/qtgui-5.15:5[dbus?,jpeg,png,wayland?,X?]
		>=dev-qt/qtimageformats-5.15:5
		>=dev-qt/qtnetwork-5.15:5[ssl]
		>=dev-qt/qtsvg-5.15:5
		>=dev-qt/qtwidgets-5.15:5[png,X?]
	)
	qt6? (
		dev-qt/qtbase:6[dbus?,gui,network,opengl,widgets,X?]
		dev-qt/qtsvg:6
		dev-qt/qt5compat:6
		wayland? ( dev-qt/qtwayland:6 )
	)
	X? ( x11-libs/libxcb:= )
"
DEPEND="${RDEPEND}
	dev-cpp/range-v3
	=dev-cpp/ms-gsl-3*
"
BDEPEND="
	${PYTHON_DEPS}
	>=dev-util/cmake-3.16
	virtual/pkgconfig
"
# dev-libs/jemalloc:=[-lazy-lock] -> https://bugs.gentoo.org/803233

PATCHES=(
	"${FILESDIR}/tdesktop-3.6.0-jemalloc-only-telegram.patch"
	"${FILESDIR}/tdesktop-3.3.0-fix-enchant.patch"
	"${FILESDIR}/tdesktop-3.5.2-musl.patch"
	"${FILESDIR}/tdesktop-4.0.2-fix-gcc12-cstdint.patch"
)

# Current desktop-file-utils-0.26 does not understand Version=1.5
QA_DESKTOP_FILE="usr/share/applications/${PN}.desktop"

pkg_pretend() {
	if has ccache ${FEATURES}; then
		ewarn "ccache does not work with ${PN} out of the box"
		ewarn "due to usage of precompiled headers"
		ewarn "check bug https://bugs.gentoo.org/715114 for more info"
		ewarn
	fi
	if use qt6; then
		ewarn "Qt6 support in gentoo is experimental."
		ewarn "Please report any issues you may find, but don't expect"
		ewarn "everything to work correctly as of yet."
		ewarn "Qt6 ebuilds are available in the ::qt overlay."
		ewarn
	fi
}

src_prepare() {
	# no explicit toggle, doesn't build with the system one #752417
	sed -i 's/DESKTOP_APP_USE_PACKAGED/NO_ONE_WILL_EVER_SET_THIS/' \
		cmake/external/rlottie/CMakeLists.txt || die

	cmake_src_prepare
}

src_configure() {
	# DESKTOP_APP_DISABLE_JEMALLOC is heavily discouraged by upstream, as the
	# glibc allocator results in high memory usage.
	# https://github.com/telegramdesktop/tdesktop/issues/16084
	# https://github.com/desktop-app/cmake_helpers/pull/91#issuecomment-881788003

	# DESKTOP_APP_QT6=OFF force-enables DESKTOP_APP_DISABLE_WAYLAND_INTEGRATION
	# This means that REQUIRED_USE="wayland? ( qt6 )", but a lot of people
	# enable USE=wayland globally, so we instead silently disable it...

	local mycmakeargs=(
		-DTDESKTOP_LAUNCHER_BASENAME="${PN}"
		-DCMAKE_DISABLE_FIND_PACKAGE_tl-expected=ON  # header only lib, some git version. prevents warnings.
		-DDESKTOP_APP_QT6=$(usex qt6)

		-DDESKTOP_APP_DISABLE_DBUS_INTEGRATION=$(usex !dbus)
		-DDESKTOP_APP_DISABLE_X11_INTEGRATION=$(usex !X)
		-DDESKTOP_APP_DISABLE_WAYLAND_INTEGRATION=$(usex !wayland)
		-DDESKTOP_APP_DISABLE_JEMALLOC=$(usex !jemalloc)
		-DDESKTOP_APP_DISABLE_SPELLCHECK=$(usex !spell)  # enables hunspell (recommended)
		-DDESKTOP_APP_USE_ENCHANT=$(usex enchant)  # enables enchant and disables hunspell
	)

	if [[ -n ${MY_TDESKTOP_API_ID} && -n ${MY_TDESKTOP_API_HASH} ]]; then
		einfo "Found custom API credentials"
		mycmakeargs+=(
			-DTDESKTOP_API_ID="${MY_TDESKTOP_API_ID}"
			-DTDESKTOP_API_HASH="${MY_TDESKTOP_API_HASH}"
		)
	else
		# https://github.com/telegramdesktop/tdesktop/blob/dev/snap/snapcraft.yaml
		# Building with snapcraft API credentials by default
		# Custom API credentials can be obtained here:
		# https://github.com/telegramdesktop/tdesktop/blob/dev/docs/api_credentials.md
		# After getting credentials you can export variables:
		#  export MY_TDESKTOP_API_ID="17349""
		#  export MY_TDESKTOP_API_HASH="344583e45741c457fe1862106095a5eb"
		# and restart the build"
		# you can set above variables (without export) in /etc/portage/env/net-im/telegram-desktop
		# portage will use custom variable every build automatically
		mycmakeargs+=(
			-DTDESKTOP_API_ID="611335"
			-DTDESKTOP_API_HASH="d524b414d21f4d37f08684c1df41ac9c"
		)
	fi

	cmake_src_configure
}

pkg_postinst() {
	xdg_pkg_postinst
	if ! use X && ! use screencast; then
		elog "both the 'X' and 'screencast' useflags are disabled, screen sharing won't work!"
		elog
	fi
	if has_version '<dev-qt/qtcore-5.15.2-r10'; then
		ewarn "Versions of dev-qt/qtcore lower than 5.15.2-r10 might cause telegram"
		ewarn "to crash when pasting big images from the clipboard."
		ewarn
	fi
	if ! use jemalloc && use elibc_glibc; then
		ewarn "Disabling USE=jemalloc on glibc systems may cause very high RAM usage!"
		ewarn "Do NOT report issues about RAM usage without enabling this flag first."
		ewarn
	fi
	if use wayland && ! use qt6; then
		ewarn "Wayland-specific integrations have been deprecated with Qt5."
		ewarn "The app will continue to function under wayland, but some"
		ewarn "functionality may be reduced."
		ewarn "These integrations are only supported when built with Qt6,"
		ewarn "which isn't available in ::gentoo as of writing."
		ewarn
	fi
	optfeature_header
	optfeature "shop payment support (requires USE=dbus enabled)" net-libs/webkit-gtk:4
}