#!/bin/busybox sh

MOUNTDIR=/boot
# expect to be run from /boot, where the boot partition is mounted (readonly)
export LOG=$(mktemp)
#LOG=/dev/null

# high brightness
echo '10' > /sys/devices/platform/backlight/backlight/backlight/brightness

#echo -e "\e[?3c"
echo -e "\e[32m" # green

echo "firstboot script running..." | tee -a ${LOG}
echo

BASEDIR="${MOUNTDIR}"

# run a custom script if present - could be used to fix u-boot and such
if test -r "${BASEDIR}/firstboot.custom.sh"; then
	echo "Running a specific firstboot script..." | tee -a ${LOG}
	(cd "${BASEDIR}" && sh firstboot.custom.sh) | tee -a ${LOG}
	echo "Finished running a specific firstboot script." | tee -a ${LOG}
fi


echo " "
sleep 1

LICENSE="
The software provided is offered without \
any warranties or guarantees of any kind, either \
expressed or implied. The use of this software is \
entirely at your own risk. We shall not be held \
responsible for any damages, losses, or adverse \
consequences arising from the use or misuse of this software.
\n\n
\ZuDo you acknowledge and agree to these terms?\Zn
\n\n
   Select an option & press START"

## Create temp file to store variable for menu choice
TEMP=$(mktemp) 

## Access /boot directory
mount -o remount,rw "${MOUNTDIR}" | tee -a ${LOG}

# list of available devices in u-boot Environment parameters' read from FORCE_VERSION
devices_ID="
bittboy2x_v1
bittboy2x_v2
bittboy3.5
q20
q90
v90
pocketgo
pocketgo_TE
xyc_gc9306
m3_r61520
m3_rm68090
m3_hx8347d
m3_gc9306
"

# list of available devices in u-boot Environment parameters' read from Auto-Detection method
devices_auto_ID="
st7789s
bittboy
bittboy2
bittboy3
xyc
m3
"

# list of available devices in this flashing procedure read from DETECTED_VERSION in u-boot Environment parameters'
DETECTED_1="V90/Q90/Q20/PocketGo ST7789S controller"
DETECTED_2="GC9306/GC9305 controller from gc9306fb"
DETECTED_3="SUP M3 unknown controller Works with R61520"
DETECTED_4="bittboy2x_v1 r61520fb controller"
DETECTED_5="bittboy3.5/bittboy2x_v2 ST7789S controller"
DETECTED_6="RM68090 controller"
DETECTED_7="R61520 controller"
DETECTED_8="R61505W controller"
DETECTED_9="HX8347-D controller"
DETECTED_10="UNKNOWN"

## Defaulting to "not found the console in string list"
FOUND_CONSOLE=false
FOUND_CONSOLE_AUTO=false

find_console_func(){
for i in $devices_ID; do
	if test "$i" = "$CONSOLE_VARIANT"; then
		FOUND_CONSOLE=true
		break
	fi
done
}

find_console_auto_func(){
for i in $devices_auto_ID; do
	if test "$i" = "$CONSOLE_VARIANT"; then
		FOUND_CONSOLE_AUTO=true
		break
	fi
done
}

# try to read what handheld we're on when calling func
console_var_func(){
	if (test -r "${MOUNTDIR}/console.cfg"); then
		source "${MOUNTDIR}/console.cfg"
	else 
		export CONSOLE_VARIANT="unknown"
	fi
}

detect_console_func(){
	console_var_func
	find_console_func
	find_console_auto_func
}

# write logs, sync & unmount MAIN before reboot/poweroff
safe_shutdown_func(){
	echo "please wait a few seconds for a ${SHUTDOWN}...." | tee -a ${LOG}
	dmesg > ${HOME}/dmesg.txt
	mv ${LOG} ${HOME}/log_firstboot.txt
	sync
	sleep 1
	mount -o remount,ro "${MOUNTDIR}" | tee -a ${LOG}
	umount /dev/mmcblk0p4 | tee -a ${LOG}
	#umount /dev/mmcblk0p1 | tee -a ${LOG} # this fails
	sleep 4
}

safe_reboot_func(){
	SHUTDOWN=reboot
	safe_shutdown_func
	reboot
}

safe_poweroff_func(){
	SHUTDOWN=poweroff
	safe_shutdown_func
	poweroff
}

console_unknown_func(){
	echo "CONSOLE_VARIANT=unknown" > ${MOUNTDIR}/console.cfg
	echo "##DO_NOT_REMOVE_THIS_LINE##" >> ${MOUNTDIR}/console.cfg
}

## Default CONSOLE_VARIANT for st7789s screens
default_console_func(){
	echo "CONSOLE_VARIANT=pocketgo" > ${MOUNTDIR}/console.cfg
	# No need to overwrite uboot FORCE version for default so continue procedure
	CONSOLE_OVERWRITE=false
}

#Test-prompt dialogs fo various scenarios
test_image_func(){
	dialog --defaultno --ok-label NO --cancel-label Inverted --stdout --title   "  Test Image" \
	--colors --pause "\n\n  \ZuAre your colors Inverted?\Zn\n\nSelect an option & press START" 12 34 10

	echo $? > $TEMP
	## Read the user's last choice from the tmp file
	CHOICE=$(cat $TEMP)
	# "NO" choice for Test_Image msgbox DIALOG_OK exit code
	## thus we have valid version and simply continue
	if test $CHOICE -eq 0; then
		dialog --timeout 2 --msgbox "Colors are correct, proceed with flashing" 0 0
	# "INVERTED" choice for Test_Iamge msgbox DIALOG_CANCEL exit code and -1/255
	## thus correct "invert" colors parameter on video driver
	else
	#TODO - make "invert" flag overwriting less dependent
		echo "INVERT=${INVERSION}" >> ${HOME}/options.cfg
		safe_reboot_func
	fi
}

test_video_func(){
	dialog --defaultno --ok-label NO --cancel-label "Flipped!" --extra-button --extra-label YES --stdout --title   "   Test Video" \
	--colors --pause "\n\n   \ZuCan you see this message?\Zn\n\nSelect an option & press START" 12 34 10

	echo $? > $TEMP
	## Read the user's first choice from the tmp file
	CHOICE=$(cat $TEMP)

	# "YES" choice for Test_Video msgbox DIALOG_EXTRA exit code
	if test $CHOICE -eq 3; then
		# Correct variant for st7789s (non forced)
		echo "CONSOLE_VARIANT=st7789s" > ${MOUNTDIR}/console.cfg
	# "Flipped!" choice for Test_Video msgbox DIALOG_CANCEL exit code
	elif test $CHOICE -eq 1; then
		# Test_Flip-prompt double checks if user selected correct answer for 1'st video test
		test_flip_func
	# "NO" or timeout choice for Test_Video msgbox thus DIALOG_OK exit code
	elif test $CHOICE -eq 0; then
		# Correct variant for bittboy2x_v1 (non forced)
		echo "CONSOLE_VARIANT=bittboy" > ${MOUNTDIR}/console.cfg
		safe_reboot_func
	# Error (DIALOG_ERROR) or ESCAPE button pressed (DIALOG_ESCAPE) thus exit code -1/255
	else
		dialog --timeout 2 --msgbox "Invalid choice, please redo the test!" 0 0
		sleep 1.5
	fi
}

test_video2_func(){
	dialog --defaultno --ok-label NO --cancel-label YES --stdout --title   "   Test Video'2" \
	--colors --pause "\n\n   \ZuCan you see this message?\Zn\n\nSelect an option & press START" 12 34 10
	
	echo $? > $TEMP
	## Read the user's last choice from the tmp file
	CHOICE=$(cat $TEMP)
	# "YES" choice for Test_Video'2 msgbox DIALOG_CANCEL exit code
	## thus we have valid version, just update to FORCE_VERSION and continue
	if test $CHOICE -eq 1; then
		echo "CONSOLE_VARIANT=bittboy2x_v1" > ${MOUNTDIR}/console.cfg
	# "NO" or timeout choice for Test_Video msgbox thus DIALOG_OK exit code 0 (or ERROR/ESCAPE with -1/255)
	## correct variant to unknown and redo whole flashing_prd again
	else
		console_unknown_func
		safe_reboot_func
	fi
}

test_keyboard_func(){
	dialog --ok-label NO --cancel-label YES --stdout --title   "  Test Keyboard" \
	--colors --pause "\n\n  \ZuDoes D-pad works correctly?\Zn\n\nSelect an option & press START" 12 34 10

	echo $? > $TEMP
	## Read the user's last choice from the tmp file
	CHOICE=$(cat $TEMP)

	# "YES" choice for Test_Keyboard msgbox DIALOG_CANCEL exit code
	## thus we have valid version, just update to FORCE_VERSION and continue
	if test $CHOICE -eq 1; then
		if test "$CONSOLE_VARIANT" == "bittboy3"; then
			echo "CONSOLE_VARIANT=bittboy3.5" > ${MOUNTDIR}/console.cfg
		elif test "$CONSOLE_VARIANT" == "bittboy2"; then
			echo "CONSOLE_VARIANT=bittboy2x_v2" > ${MOUNTDIR}/console.cfg
		elif test "$CONSOLE_VARIANT" == "xyc"; then
			echo "CONSOLE_VARIANT=xyc_gc9306" > ${MOUNTDIR}/console.cfg
			# Test_Image-prompt if proper "invert" colors parameter was loaded:
			INVERSION=1 #applied only if colors are inverted
			test_image_func
		elif test "$CONSOLE_VARIANT" == "m3"; then
			echo "CONSOLE_VARIANT=m3_gc9306" > ${MOUNTDIR}/console.cfg
		fi
	# "NO" or timeout choice for Test_Keyboard msgbox DIALOG_OK exit code
	## thus correct Auto-Detection variant and reboot
	elif test $CHOICE -eq 0; then
		if test "$CONSOLE_VARIANT" == "bittboy3"; then
			echo "CONSOLE_VARIANT=bittboy2" > ${MOUNTDIR}/console.cfg
		elif test "$CONSOLE_VARIANT" == "bittboy2"; then
			console_unknown_func
		elif test "$CONSOLE_VARIANT" == "xyc"; then
			console_unknown_func
		elif test "$CONSOLE_VARIANT" == "m3"; then
			echo "CONSOLE_VARIANT=xyc" > ${MOUNTDIR}/console.cfg
		fi
		safe_reboot_func
	# Error (DIALOG_ERROR) or ESCAPE button pressed (DIALOG_ESCAPE) thus exit code -1/255
	else
		dialog --timeout 2 --msgbox "Invalid choice, please redo the test!" 0 0
		sleep 1.5
	fi
}

test_variant_func(){
	dialog --defaultno --ok-label NO --cancel-label YES --stdout --title   "   Test Variant" \
	--colors --pause "Does this device match yours?" 0 0 15
	
	echo $? > $TEMP
	## Read the user's last choice from the tmp file
	CHOICE=$(cat $TEMP)
	# Any choice different than "YES" from Test_Variant - that is 0/-1/255 exit code
	## correct variant to unknown and redo whole flashing_prd again
	if !(test $CHOICE -eq 1); then
		console_unknown_func
		safe_reboot_func
	fi
}

test_flip_func(){
	if (dialog --stdout --ok-label YES --cancel-label NO --title "Test Flip" --pause "  \n   Flipped? \n\nAre you sure?!" 12 15 10); then
		# Correct variant for bittboy3.5 (non forced) and display info about flipped image
		echo "CONSOLE_VARIANT=bittboy3" > ${MOUNTDIR}/console.cfg
		dialog --timeout 2 --msgbox "Image flipped! correct&reboot" 0 0
		sleep 1.5
		#TODO: use special Unicode characters to draw text upside-down e.g.:
		## dialog --timeout 2 --msgbox "ƃuᴉʇooqǝɹ⅋uᴉʇɔǝɹɹoɔ 'pǝddᴉןɟ ǝƃɐɯᴉ \n\n image flipped, correcting&rebooting" 0 0
		safe_reboot_func
	else
		dialog --timeout 2 --msgbox "Invalid choice, please redo the test!" 0 0
		sleep 1.5
	fi
}

#Checking if device at hand is operational within flashing procedure
CONSOLE_DETECTED=false
if (grep -qE "${DETECTED_1}|${DETECTED_2}|${DETECTED_3}|${DETECTED_4}|${DETECTED_5}|${DETECTED_6}|${DETECTED_7}|${DETECTED_8}|${DETECTED_9}|${DETECTED_10}" "${MOUNTDIR}/uEnv.txt"); then
	CONSOLE_DETECTED=true
fi

# I - Test_Block
detect_console_func
if ! $FOUND_CONSOLE && ! $FOUND_CONSOLE_AUTO && $CONSOLE_DETECTED; then
	if (grep -q "$DETECTED_1" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_1" 0 0
		# Test_Video-prompt if proper miyoo video's version driver was loaded:
		## Loop Test_Video until correct selection has been performed (CHOICE=0/3)
		### former CHOICE=1 meant safe_reboot if correct and shouldn't reach to this point
		while true; do
			test_video_func
			if !(test $CHOICE -eq -1 || test $CHOICE -eq 1 || test $CHOICE -eq 255); then
				break
			fi
		done
	elif (grep -q "$DETECTED_2" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_2" 0 0
		echo "CONSOLE_VARIANT=m3" > ${MOUNTDIR}/console.cfg
	elif (grep -q "$DETECTED_3" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_3" 0 0
		echo "CONSOLE_VARIANT=m3_r61520" > ${MOUNTDIR}/console.cfg
		# Test_Image-prompt if proper "invert" colors parameter was loaded:
		INVERSION=0 #applied only if colors are inverted 
		test_image_func
	# look in II Test block for following DETECTED versions as these imply devices_auto_ID variants:
	## DETECTED_4 - bittboy
	## DETECTED_5 - bittboy3/2
	elif (grep -q "$DETECTED_6" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_6" 0 0
		echo "CONSOLE_VARIANT=m3_rm68090" > ${MOUNTDIR}/console.cfg
	elif (grep -q "$DETECTED_7" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_7" 0 0
		#echo "CONSOLE_VARIANT=r61520" > ${MOUNTDIR}/console.cfg
	elif (grep -q "$DETECTED_8" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_8" 0 0
		#echo "CONSOLE_VARIANT=r61505w" > ${MOUNTDIR}/console.cfg
	elif (grep -q "$DETECTED_9" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_9" 0 0
		echo "CONSOLE_VARIANT=m3_hx8347d" > ${MOUNTDIR}/console.cfg
	elif (grep -q "$DETECTED_10" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_10" 0 0
		#echo "CONSOLE_VARIANT=unknown-error" > ${MOUNTDIR}/console.cfg
	fi
	# Overwrite CONSOLE_VARIANT from new entry
	source "${MOUNTDIR}/console.cfg"
fi

# II - Test_Block
## Defaulting to console overwriting inactive
CONSOLE_OVERWRITE=false
## Test if console have been found in devices_auto_ID
detect_console_func
## test if no device specified in console.cfg
if ! $FOUND_CONSOLE && $FOUND_CONSOLE_AUTO && $CONSOLE_DETECTED; then
	# show selection menu for ST7789S devices
	if (test "$CONSOLE_VARIANT" == "st7789s" && grep -q "$DETECTED_1" "${MOUNTDIR}/uEnv.txt"); then
		dialog --clear --timeout 60 --title "Select your device:" --menu " " 15 40 5 \
		1 "Powkiddy Q20" \
		2 "Powkiddy Q90" \
		3 "Powkiddy V90" \
		4 "PocketGO (default)" \
		5 "PocketGO with TE pin" \
		2> $TEMP
		## Defaulting to console overwriting active
		CONSOLE_OVERWRITE=true
		## Read the user's choice from the file
		CHOICE=$(cat $TEMP)
		## Perform actions based on the user's choice
		case $CHOICE in
			1)
				echo "CONSOLE_VARIANT=q20" > ${MOUNTDIR}/console.cfg
				;;
			2)
				echo "CONSOLE_VARIANT=q90" > ${MOUNTDIR}/console.cfg
				;;
			3)
				echo "CONSOLE_VARIANT=v90" > ${MOUNTDIR}/console.cfg
				;;
			4)
				default_console_func
				;;
			5)
				echo "CONSOLE_VARIANT=pocketgo_TE" > ${MOUNTDIR}/console.cfg
				;;
			*)
				dialog --timeout 4 --msgbox "Invalid choice. Exiting and selecting default device from autodetection." 0 0
				default_console_func
				sleep 0.1
				;;
		esac
	elif (((test "$CONSOLE_VARIANT" == "bittboy2" || test "$CONSOLE_VARIANT" == "bittboy3") && grep -q "$DETECTED_5" "${MOUNTDIR}/uEnv.txt") || ((test "$CONSOLE_VARIANT" == "xyc" || test "$CONSOLE_VARIANT" == "m3") && grep -q "$DETECTED_2" "${MOUNTDIR}/uEnv.txt")); then
		if (grep -q "$DETECTED_5" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_5" 0 0
		elif (grep -q "$DETECTED_2" "${MOUNTDIR}/uEnv.txt"); then
		dialog --timeout 4 --msgbox  "Correcting $DETECTED_2 - wait for further instructions" 0 0
		fi
		# Test_Keyboard-prompt if proper miyoo.kbd  version was loaded:
		## Loop Test_Keyboard until correct selection has been performed (CHOICE=0/1)
		while true; do
			test_keyboard_func
			if !(test $CHOICE -eq -1 || test $CHOICE -eq 255); then
				break
			fi
		done
	elif (test "$CONSOLE_VARIANT" == "bittboy" && grep -q "$DETECTED_4" "${MOUNTDIR}/uEnv.txt") ; then
		dialog --timeout 3 --msgbox  "Auto-Detected $DETECTED_4" 0 0
		# Test_Video'2-prompt if proper miyoo video's version driver was loaded:
		test_video2_func
	fi
fi

# III - Test_Block
detect_console_func
BITTBOY_CONFIG=false
MIYOO_CONFIG=false
if $FOUND_CONSOLE; then
	# Info_Box about selected/edited device in console.cfg
	case $CONSOLE_VARIANT in
		bittboy2x_v1)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox " BittBoy2x v1" 5 18
				BITTBOY_CONFIG=true
				;;
		bittboy2x_v2)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox " BittBoy2x v2" 5 18
				BITTBOY_CONFIG=true
				;;
		bittboy3.5)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox " BittBoy3.5" 5 18
				BITTBOY_CONFIG=true
				;;
		q20)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox " Powkiddy Q20" 5 18
				MIYOO_CONFIG=true
				;;
		q90)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox " Powkiddy Q90" 5 18
				MIYOO_CONFIG=true
				;;
		v90)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox " Powkiddy V90" 5 18
				MIYOO_CONFIG=true
				;;
		pocketgo)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox " PocketGo" 5 18
				MIYOO_CONFIG=true
				;;
		pocketgo_TE)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox " PocketGo+TE" 5 18
				MIYOO_CONFIG=true
				;;
		xyc_gc9306)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox " XYC Q8" 5 18
				MIYOO_CONFIG=true
				;;
		m3_r61520)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox "         SUP M3\n (controller of r61520fb)" 6 29
				MIYOO_CONFIG=true
				;;
		m3_rm68090)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox "      SUP M3\n(RM68090 controller)" 6 24
				MIYOO_CONFIG=true
				;;
		m3_hx8347d)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox "      SUP M3\n(HX8347D controller)" 6 24
				MIYOO_CONFIG=true
				;;
		m3_gc9306)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox "      SUP M3\n(GC9306 controller)" 6 24
				MIYOO_CONFIG=true
				;;
		*)
				dialog --colors --timeout 2 --ok-label " Your device " --msgbox "\Zb\Z1 Unknown-Error\Zn" 5 18
	esac
	# Test_Variant-prompt if correct CONSOLE_VARIANT has been written to console.cfg
	test_variant_func
else
	dialog --colors --timeout 2 --ok-label " Your device " --msgbox "\Zb\Z1 Unknown\Zn" 5 18
	console_unknown_func
fi

# License_agreement-prompt
if (dialog --clear --ok-label NO --cancel-label YES --stdout --title "   License agreement" \
	--colors --pause "\n              \ZbMiyooCFW\Zn\n$LICENSE" 22 60 30 || test $? -eq 255); then
	echo -en "     We understand. Have a nice day!\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n"
	sleep 1
	console_unknown_func
	safe_poweroff_func
fi
mount -o remount,ro "${MOUNTDIR}" | tee -a ${LOG}

#grep all partitions current size
SD_SIZE=$(cat "/sys/block/mmcblk0/size")
P1_SIZE=$(cat "/sys/block/mmcblk0/mmcblk0p1/size")
P2_SIZE=$(cat "/sys/block/mmcblk0/mmcblk0p2/size")
P3_SIZE=$(cat "/sys/block/mmcblk0/mmcblk0p3/size")
P4_SIZE=$(cat "/sys/block/mmcblk0/mmcblk0p4/size")
SD_SIZE_IN_MiB=$((SD_SIZE * 512 / 1024 / 1024))
SD_SIZE_IN_GiB=$((SD_SIZE * 512 / 1024 / 1024 / 1024))
BOOT_SIZE=$(((1016+1) * 1024 / 512)) #bootloader partition=1016K (see `genimage` script in buildroot)
## boot_size calculated to 512 byte sector size blocks, adding +1K as a safety measure for roundups (at fatresize we use KibiBits)

#Calculate unallocated left space to expand MAIN:
SD_MAX_UNALL_SIZE="$((${SD_SIZE} - (${P1_SIZE} + ${P2_SIZE} + ${P3_SIZE} + ${P4_SIZE}) - $BOOT_SIZE))"
SD_MAX_UNALL_SIZE_IN_MiB=$((SD_MAX_UNALL_SIZE * 512 / 1024 / 1024))
SD_MAX_UNALL_SIZE_IN_GiB=$(echo "scale=1; ${SD_MAX_UNALL_SIZE} * 512 / 1024 / 1024 / 1024" | bc)

#Calculate available space for 4'th partition (MAIN):
SD_MAX_AVAIL_SIZE="$((${SD_SIZE} - (${P1_SIZE} + ${P2_SIZE} + ${P3_SIZE}) - $BOOT_SIZE))"
SD_MAX_AVAIL_SIZE_IN_KiB=$((SD_MAX_AVAIL_SIZE * 512 / 1024))

# Expand_MAIN_Partition-prompt for fatresize the p4 partition if requested
RESIZE_COMMENCED=false
if (dialog --clear --stdout --ok-label YES --cancel-label NO --title "   AUTO-RESIZE" \
   --colors --pause "\n\n       \ZuExpand MAIN partition?\Zn\n\n   Select an option & press START
   \n\n             \ZbWARNING:\Zn\n       After 10s auto-resize\n   of FAT32 partition will begin." 15 60 10); then
	clear
	RESIZE_ABORT=false
	if test "$SD_SIZE_IN_GiB" -gt 128; then
		if (dialog --clear --stdout --ok-label NO --cancel-label YES --title "   \Zb\Z1WARNING!\Zn" \
		--colors --pause "\nYour SD card exceeds max. size for auto-resizing! 
		\n\nWe could however expand it to 118GB. \n\n           \ZuDo you AGREE?\Zn
		\n\n\ZbINFO: For microSD >128GB big we\n      recommend to use your PC!\Zn" 0 0 30 || test $? -eq 255); then
			dialog --clear --colors --timeout 2 --msgbox " FAT resizing \ZuABORTED!\Zn" 5 27
			clear
			RESIZE_ABORT=true
		else
			SD_MAX_AVAIL_SIZE_IN_KiB=123731968
		fi
	fi
	SD_MAX_AVAIL_SIZE_IN_GiB=$(echo "scale=1; ${SD_MAX_AVAIL_SIZE_IN_KiB} / 1024 / 1024" | bc) #only to inform user about end point for resize
	SD_MAX_AVAIL_SIZE_IN_GB=$(echo "scale=1; ${SD_MAX_AVAIL_SIZE_IN_KiB} * 1024 / 1000 / 1000 / 1000" | bc)
	P4_SIZE_IN_GB=$(echo "scale=1; ${P4_SIZE} * 512 / 1000 / 1000 / 1000" | bc)
	# roundup GB value to 0,1GB for integer calculations:
	SD_MAX_AVAIL_SIZE_IN_GBx10=$(echo "$SD_MAX_AVAIL_SIZE_IN_GB" | tr -d ".")
	P4_SIZE_IN_GBx10=$(echo "$P4_SIZE_IN_GB" | tr -d ".")
	#Sanity checks if we don't down- or over-resize partition:
	if (test "$P4_SIZE_IN_GBx10" -ge "$SD_MAX_AVAIL_SIZE_IN_GBx10" || test "$SD_MAX_UNALL_SIZE_IN_MiB" -le 0); then
		echo "Your MAIN partition is greater than available space for resizing or you lack unallocated sectors space" | tee -a ${LOG}
		sleep 1.5
		RESIZE_ABORT=true
	fi
	echo "The full size of your SD is ${SD_SIZE_IN_MiB}MB large" | tee -a ${LOG}
	echo "Unallocated space available for resizing equals ${SD_MAX_UNALL_SIZE_IN_GiB}GB," | tee -a ${LOG}
	echo "and more precisely it's ${SD_MAX_UNALL_SIZE_IN_MiB}MB big" | tee -a ${LOG}
	if ! $RESIZE_ABORT; then
		echo "Resizing the MAIN partition to ${SD_MAX_AVAIL_SIZE_IN_GiB}GB." | tee -a ${LOG}
		echo "This can take A LONG TIME, so be patient." | tee -a ${LOG}
		umount /dev/mmcblk0p4 | tee -a ${LOG}
		fsck.fat -y /dev/mmcblk0p4 | tee -a ${LOG}
		#TODO: fix outputting logs from fatresize stdout
		fatresize --size="${SD_MAX_AVAIL_SIZE_IN_KiB}"ki -v -p /dev/mmcblk0p4 -n4 | tee -a ${LOG}
		fsck.fat -y /dev/mmcblk0p4 | tee -a ${LOG}
		echo -n -e \\xEB\\x58\\x90 > /dev/mmcblk0p4
		sync
		mount -t vfat -o rw,sync,utf8 /dev/mmcblk0p4 ${HOME} | tee -a ${LOG}
	else
		echo "MAIN fat partition resizing was aborted!" | tee -a ${LOG}
		sleep 2
	fi
	RESIZE_COMMENCED=true
fi

# Cleanup - delete the temporary file storing variable value
rm $TEMP

# disable this script
mount -o remount,rw "${MOUNTDIR}" | tee -a ${LOG}
echo "Disabling the firstboot script." | tee -a ${LOG}
mv "${MOUNTDIR}/firstboot" "${MOUNTDIR}/firstboot.done" | tee -a ${LOG}

# copy over the config files
echo "Copying default configuration files into place..." | tee -a ${LOG}
if $BITTBOY_CONFIG; then
	cp "${HOME}/gmenu2x/input_bittboy.conf" "${MOUNTDIR}/configs/input.conf"
elif $MIYOO_CONFIG; then
	cp "${HOME}/gmenu2x/input_miyoo.conf" "${MOUNTDIR}/configs/input.conf"
fi
mount -o remount,ro "${MOUNTDIR}" | tee -a ${LOG}
if test -r "${BASEDIR}/configs/manifest"; then
	cat "${BASEDIR}/configs/manifest" | while read -r LINE; do
		if test "${LINE}" == "${LINE#!}" -a "${LINE}" != "" ; then
			set -- ${LINE}
			# 1               2
			# source_filename target_filename/inside main/
			if test -r "${BASEDIR}/configs/$1"; then
				TO="$2"
				if test "${TO}" == ""; then
					TO="$1"
				fi
				echo "Copying $1 to ${HOME}/$TO..." | tee -a ${LOG}
				cp -f "${BASEDIR}/configs/$1" "${HOME}/$TO" | tee -a ${LOG}
			fi
		fi
	done
fi
echo

sync
echo "firstboot script finished." | tee -a ${LOG}
touch ${HOME}/firstboot.completed
echo

# Reboot device if CONSOLE_VARIANT was overwritten from $CHOICE so that it could be applied in u-boot by readID 
## or resizing FAT partition has completed / found firstboot custom script
if ($CONSOLE_OVERWRITE || $RESIZE_COMMENCED || test -r "${BASEDIR}/firstboot.custom.sh"); then
	safe_reboot_func
else
#just grep logs from temp directory before continuing
	mv ${LOG} ${HOME}/log_firstboot.txt
fi