# SPDX-License-Identifier: GPL-3.0-only
# Copyright (c) 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# Copyright (c) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# Copyright (c) 2023-2025 Leah Rowe <leah@libreboot.org>

cbcfgsdir="config/coreboot"
hashfiles="vendorhashes blobhashes" # used to detect and error out
			# if running on an archive that needs vendor files
dontflash="!!! AN ERROR OCCURED! Do NOT flash these images !!!"
tmpromdel="$xbmklocal/DO_NOT_FLASH"
nvm="util/nvmutil/nvm"
ifdtool="elf/ifdtool/default/ifdtool"

inject()
{
	remkdir "$tmpromdel"

	set +u +e
	[ $# -lt 1 ] && err "No options specified. - $dontflash"
	eval "`setvars "" new_mac xchanged`"

	archive="$1";
	new_mac="xx:xx:xx:xx:xx:xx"

	[ $# -gt 1 ] && case "$2" in
	setmac)
		[ $# -gt 2 ] && new_mac="$3" && \
		    [ -z "$new_mac" ] && err "Empty MAC address specified" ;;
	*) err "Unrecognised inject mode: '$2'"
	esac

	[ -n "$new_mac" ] && [ "$new_mac" != "restore" ] && \
		x_ make -C util/nvmutil clean && x_ make -C util/nvmutil

	check_release "$archive" || err "'$archive' is not a release archive"

	if readcfg && readkconfig; then
		patch_release_roms
	fi

	[ "$xchanged" != "y" ] && printf "\n'%s' *NOT* modified.\n" "$archive"
	[ "$xchanged" = "y" ] && printf "\n'%s' %s.\n" "$archive" "$xtype"; :
}

check_release()
{
	[ -L "$archive" ] && err "'$archive' is a symlink. $dontflash"
	e "$archive" f missing && return 1

	archivename="`basename "$archive"`"
	[ -z "$archivename" ] && err "Can't determine archive name. $dontflash"

	case "$archivename" in
	*_src.tar.xz)
		err "'$archive' is a src archive, silly!" ;;
	grub_*|seagrub_*|custom_*|seauboot_*|seabios_withgrub_*)
		return 1 ;;
	*.tar.xz) _stripped_prefix="${archivename#*_}"
		board="${_stripped_prefix%.tar.xz}" ;;
	*) err "'$archive': could not detect board type - $dontflash"
	esac; :
}

readcfg()
{
	if [ "$board" = "serprog_rp2040" ] || [ "$board" = "serprog_stm32" ] \
	    || [ "$board" = "serprog_pico" ]; then
		printf "'%s' is a serprog firmware archive.\n" "$archive" 1>&2
		return 1
	fi
	boarddir="$cbcfgsdir/$board"

	eval "`setcfg "$boarddir/target.cfg"`"
	chkvars tree && x_ ./mk -d coreboot "$tree"

	cbdir="src/coreboot/$tree"
	cbfstool="elf/cbfstool/$tree/cbfstool"
	rmodtool="elf/cbfstool/$tree/rmodtool"
	cbfstool="elf/cbfstool/$tree/cbfstool"
	ifdtool="elf/ifdtool/$tree/ifdtool"
	[ -n "$IFD_platform" ] && ifdprefix="-p $IFD_platform"; :
}

readkconfig()
{
	x_ rm -f "$xbmktmp/cbcfg"
	fx_ scankconfig x_ find "$boarddir/config" -type f
	eval "`setcfg "$xbmktmp/cbcfg" 1`"
}

scankconfig()
{
	for cbc in $cv; do
		grep "$cbc" "$1" 1>>"$xbmktmp/cbcfg" 2>/dev/null || :
	done
}

patch_release_roms()
{
	tmpromdir="$xbmklocal/DO_NOT_FLASH/bin/$board"

	remkdir "${tmpromdir%"/bin/$board"}"
	x_ tar -xf "$archive" -C "${tmpromdir%"/bin/$board"}"

	for _hashes in $hashfiles; do
		e "$tmpromdir/$_hashes" f && err \
		    "'$archive': vendorfile insertion unsupported; $dontflash"
	done

	[ -z "$new_mac" ] || [ -z "$CONFIG_GBE_BIN_PATH" ] || modify_mac

	[ "$xchanged" = "y" ] || rm -Rf "$tmpromdel" || :
	[ "$xchanged" = "y" ] || return 0
	(
	x_ cd "${tmpromdir%"/bin/$board"}"
	mkrom_tarball "bin/$board"
	) || err "Cannot re-generate '$archive' - $dontflash"

	mv "${tmpromdir%"/bin/$board"}/bin/${relname}_${board}.tar.xz" \
	    "$archive" || err "'$archive' -> Can't overwrite - $dontflash"; :
}

modify_mac()
{
	x_ cp "${CONFIG_GBE_BIN_PATH##*../}" "$xbmklocal/gbe"
	[ -n "$new_mac" ] && [ "$new_mac" != "restore" ] && \
	    x_ "$nvm" "$xbmklocal/gbe" setmac "$new_mac"

	fx_ newmac x_ find "$tmpromdir" -maxdepth 1 -type f -name "*.rom"
}

newmac()
{
	e "$1" f && xchanged="y" && x_ \
	    "$ifdtool" $ifdprefix -i GbE:"$xbmklocal/gbe" "$1" -O "$1"; :
}