#!/usr/bin/env sh
# SPDX-License-Identifier: GPL-3.0-only
# SPDX-FileCopyrightText: 2022 Caleb La Grange <thonkpeasant@protonmail.com>
# SPDX-FileCopyrightText: 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
# SPDX-FileCopyrightText: 2023 Leah Rowe <leah@libreboot.org>

. "include/err.sh"
. "include/option.sh"
. "include/mrc.sh"

export PATH="${PATH}:/sbin"

_ua="Mozilla/5.0 (Windows NT 10.0; rv:91.0) Gecko/20100101 Firefox/91.0"
_7ztest="a"

e6400_unpack="${PWD}/src/bios_extract/dell_inspiron_1100_unpacker.py"
kbc1126_ec_dump="${PWD}/${cbdir}/util/kbc1126/kbc1126_ec_dump"
me7updateparser="${PWD}/util/me7_update_parser/me7_update_parser.py"
mecleaner="${PWD}/${cbdir}/util/me_cleaner/me_cleaner.py"
pfs_extract="${PWD}/src/biosutilities/Dell_PFS_Extract.py"
uefiextract="${PWD}/src/uefitool/uefiextract"

eval "$(setvars "" _b _dl EC_url EC_url_bkup EC_hash DL_hash DL_url DL_url_bkup \
    E6400_VGA_DL_hash E6400_VGA_DL_url E6400_VGA_DL_url_bkup E6400_VGA_offset \
    E6400_VGA_romname SCH5545EC_DL_url SCH5545EC_DL_url_bkup SCH5545EC_DL_hash \
    is_rom)"

main()
{
	[ $# -gt 0 ] || err "No argument given"
	board="${1}"
	boarddir="${cbcfgsdir}/${board}"
	_b="${board%%_*mb}" # shorthand (avoid duplicating config per rom size)

	check_defconfig "${boarddir}" && exit 0
	detect_firmware && exit 0
	scan_config "${_b}" "config/vendor" "err"

	build_dependencies
	download_vendorfiles
}

detect_firmware()
{
	_cfg_exists="n"
	for _chk_file in "${boarddir}/config/"*; do
		[ -f "${_chk_file}" ] && _cfg_exists="y" && break
	done
	[ "${_cfg_exists}" = "n" ] && return 1

	set -- "${boarddir}/config/"*
	. "${1}" 2>/dev/null

	for c in CONFIG_HAVE_MRC CONFIG_HAVE_ME_BIN CONFIG_KBC1126_FIRMWARE \
	    CONFIG_VGA_BIOS_FILE CONFIG_INCLUDE_SMSC_SCH5545_EC_FW; do
		eval "[ -z \"\${${c}}\" ] || return 1"
	done
	printf "Vendor files not needed for: %s\n" "${board}" 1>&2
}

build_dependencies()
{
	[ -d "${cbdir}" ] || x_ ./update trees -f coreboot ${cbdir##*/}
	for d in uefitool biosutilities bios_extract; do
		[ -d "src/${d}" ] && continue
		x_ ./update trees -f "${d}"
	done
	[ -f "${uefiextract}" ] || x_ ./update trees -b uefitool
	[ -f "${kbc1126_ec_dump}" ] || x_ make -C "${cbdir}/util/kbc1126"
	[ -f "${cbfstool}" ] && [ -f "${ifdtool}" ] && return 0
	x_ ./update trees -b coreboot utils default
}

download_vendorfiles()
{
	[ -z "${CONFIG_HAVE_ME_BIN}" ] || \
		fetch intel_me "$DL_url" "$DL_url_bkup" "$DL_hash" \
		    "${CONFIG_ME_BIN_PATH}"
	[ -z "${CONFIG_INCLUDE_SMSC_SCH5545_EC_FW}" ] || \
		fetch sch5545ec "$SCH5545EC_DL_url" "$SCH5545EC_DL_url_bkup" \
		    "$SCH5545EC_DL_hash" "$CONFIG_SMSC_SCH5545_EC_FW_FILE"
	[ -z "${CONFIG_KBC1126_FIRMWARE}" ] || \
		fetch kbc1126ec "$EC_url" "$EC_url_bkup" "$EC_hash" \
		    "${CONFIG_KBC1126_FW1}"
	[ -z "${CONFIG_VGA_BIOS_FILE}" ] || \
		fetch "e6400vga" "$E6400_VGA_DL_url" "$E6400_VGA_DL_url_bkup" \
		    "$E6400_VGA_DL_hash" "$CONFIG_VGA_BIOS_FILE"
	[ -z "${CONFIG_HAVE_MRC}" ] && return 0
	fetch "mrc" "$MRC_url" "$MRC_url_bkup" "$MRC_hash" "$CONFIG_MRC_FILE"
}

fetch()
{
	dl_type="${1}"
	dl="${2}"
	dl_bkup="${3}"
	dlsum="${4}"
	[ "${5}" = "/dev/null" ] && return 0
	[ "${5# }" = "$5" ] || err "fetch: space not allowed in _dest: '$5'"
	[ "${5#/}" = "$5" ] || err "fetch: absolute path not allowed: '$5'"
	_dest="${5##*../}"
	_dl="${vendir}/cache/${dlsum}"
	eval "$(setvars "n" dl_fail is_rom)"

	x_ mkdir -p "${_dl%/*}"

	if [ "${dl}" = "rom" ] || [ "${dl_bkup}" = "rom" ]; then
		is_rom="y"
	else
		dl_fail="y"
		vendor_checksum "${dlsum}" "${_dl}" || dl_fail="n"
	fi
	for url in "${dl}" "${dl_bkup}"; do
		[ "${dl_fail}" = "n" ] && break
		[ -z "${url}" ] && continue
		x_ rm -f "${_dl}"
		curl --location --retry 3 -A "$_ua" "$url" -o "$_dl" || \
		    wget --tries 3 -U "$_ua" "$url" -O "$_dl" || continue
		vendor_checksum "${dlsum}" "${_dl}" || dl_fail="n"
	done
	[ "${dl_fail}" = "y" ] && \
		err "fetch ${dlsum}: matched file unavailable"

	x_ rm -Rf "${_dl}_extracted"
	mkdirs "${_dest}" "extract_${dl_type}" || return 0
	eval "extract_${dl_type}"

	[ -f "${_dest}" ] && return 0
	err "extract_${dl_type} (fetch): missing file: '${_dest}'"
}

vendor_checksum()
{
	[ "$(sha512sum "$2" | awk '{print $1}')" != "$1" ] || return 1
	printf "Bad checksum for file: %s\n" "$2" 1>&2
	rm -f "$2" || :
}

mkdirs()
{
	if [ -f "${1}" ]; then
		printf "mkdirs %s %s: already downloaded\n" "$1" "$2" 1>&2
		return 1
	fi
	mkdir -p "${1%/*}" || err "mkdirs: !mkdir -p ${1%/*}"
	remkdir "${appdir}"
	if [ "${is_rom}" = "y" ]; then
		cp "${_dl}" "${appdir}" || \
		    err "mkdirs copyrom ${_dl}: can't copy to appdir"
	else
		extract_archive "${_dl}" "${appdir}" || \
		    [ "${2}" = "extract_e6400vga" ] || \
		    err "mkdirs ${1} ${2}: !extract"
	fi
}

extract_intel_me()
{
	_me="${PWD}/${_dest}" # must always be an absolute path
	cdir="${PWD}/${appdir}" # must always be an absolute path
	[ $# -gt 0 ] && _me="${1}" && cdir="${2}"
	[ -f "${_me}" ] && return 0

	sdir="$(mktemp -d)"
	mkdir -p "${sdir}" || err "extract_intel_me: !mkdir -p \"${sdir}\""
	(
	[ "${cdir#/a}" != "${cdir}" ] && cdir="${cdir#/}"
	cd "${cdir}" || err "extract_intel_me: !cd \"${cdir}\""
	for i in *; do
		[ -f "${_me}" ] && break
		[ -L "${i}" ] && continue
		if [ -f "${i}" ]; then
			"${mecleaner}" -r -t -O "${sdir}/vendorfile" \
			    -M "${_me}" "${i}" && break
			"${mecleaner}" -r -t -O "${_me}" "${i}" && break
			"${me7updateparser}" -O "${_me}" "${i}" && break
			_7ztest="${_7ztest}a"
			extract_archive "${i}" "${_7ztest}" || continue
			extract_intel_me "${_me}" "${cdir}/${_7ztest}"
		elif [ -d "$i" ]; then
			extract_intel_me "${_me}" "${cdir}/${i}"
		else
			continue
		fi
		cdir="${1}"
		[ "${cdir#/a}" != "${cdir}" ] && cdir="${cdir#/}"
		cd "${cdir}" || :
	done
	)
	rm -Rf "${sdir}" || err "extract_intel_me: !rm -Rf ${sdir}"
}

extract_archive()
{
	innoextract "$1" -d "$2" || python "$pfs_extract" "$1" -e || 7z x "$1" \
	    -o"$2" || unar "$1" -o "$2" || unzip "$1" -d "$2" || return 1
}

extract_kbc1126ec()
{
	(
	x_ cd "${appdir}/"
	mv Rompaq/68*.BIN ec.bin || :
	if [ ! -f ec.bin ]; then
		unar -D ROM.CAB Rom.bin || unar -D Rom.CAB Rom.bin || \
		    unar -D 68*.CAB Rom.bin || err "can't extract Rom.bin"
		x_ mv Rom.bin ec.bin
	fi
	[ -f ec.bin ] || err "extract_kbc1126_ec ${board}: can't extract"
	"${kbc1126_ec_dump}" ec.bin || \
	    err "extract_kbc1126_ec ${board}: can't extract ecfw1/2.bin"
	) || err "can't extract kbc1126 ec firmware"
	ec_ex="y"
	for i in 1 2; do
		[ -f "${appdir}/ec.bin.fw${i}" ] || ec_ex="n"
	done
	[ "${ec_ex}" = "y" ] || \
	    err "extract_kbc1126_ec ${board}: didn't extract ecfw1/2.bin"
	cp "${appdir}/"ec.bin.fw* "${_dest%/*}/" || \
	    err "extract_kbc1126_ec ${board}: can't copy ec binaries"
}

extract_e6400vga()
{
	for v in E6400_VGA_offset E6400_VGA_romname; do
		eval "[ -z \"\$$v\" ] && err \"extract_e6400vga: $v undefined\""
	done
	tail -c +$E6400_VGA_offset "$_dl" | gunzip > "$appdir/bios.bin" || :
	(
	x_ cd "${appdir}"
	[ -f "bios.bin" ] || err "extract_e6400vga: can't extract bios.bin"
	"${e6400_unpack}" bios.bin || printf "TODO: fix dell extract util\n"
	[ -f "${E6400_VGA_romname}" ] || \
		err "extract_e6400vga: can't extract vga rom from bios.bin"
	) || err "can't extract e6400 vga rom"
	cp "${appdir}/${E6400_VGA_romname}" "${_dest}" || \
	    err "extract_e6400vga ${board}: can't copy vga rom to ${_dest}"
}

extract_sch5545ec()
{
	# full system ROM (UEFI), to extract with UEFIExtract:
	_bios="${_dl}_extracted/Firmware/1 ${dlsum} -- 1 System BIOS vA.28.bin"
	# this is the SCH5545 firmware, inside of the extracted UEFI ROM:
	_sch5545ec_fw="${_bios}.dump/4 7A9354D9-0468-444A-81CE-0BF617D890DF"
	_sch5545ec_fw="${_sch5545ec_fw}/54 D386BEB8-4B54-4E69-94F5-06091F67E0D3"
	_sch5545ec_fw="${_sch5545ec_fw}/0 Raw section/body.bin" # <-- this!

	# this makes the file defined by _sch5545ec_fw available to copy
	"${uefiextract}" "${_bios}" || \
	    err "extract_sch5545ec: cannot extract from uefi image"
	cp "${_sch5545ec_fw}" "${_dest}" || \
	    err "extract_sch5545ec: cannot copy sch5545ec firmware file"
}

main $@