#!/system/bin/sh

/usbdbg.sh device

TF1_PATH=/mnt/mmc
TF2_PATH=/mnt/sdcard
SDCARD_PATH=$TF1_PATH
SYSTEM_DIR=/.system
SYSTEM_FRAG=$SYSTEM_DIR/rg35xx
UPDATE_FRAG=/MinUI.zip
SYSTEM_PATH=${SDCARD_PATH}${SYSTEM_FRAG}
UPDATE_PATH=${SDCARD_PATH}${UPDATE_FRAG}

mkdir /mnt/sdcard
if [ -e /dev/block/mmcblk1p1 ]; then
	SDCARD_DEVICE=/dev/block/mmcblk1p1
else
	SDCARD_DEVICE=/dev/block/mmcblk1
fi
mount -t vfat -o rw,utf8,noatime $SDCARD_DEVICE /mnt/sdcard
if [ $? -ne 0 ]; then
	mount -t exfat -o rw,utf8,noatime $SDCARD_DEVICE /mnt/sdcard
	if [ $? -ne 0 ]; then
		rm -rf /mnt/sdcard
		ln -s /mnt/mmc /mnt/sdcard
	fi
fi

if [ ! -d $SYSTEM_PATH ] && [ ! -f $UPDATE_PATH ]; then
	# try TF2
	SDCARD_PATH=$TF2_PATH
	SYSTEM_PATH=${SDCARD_PATH}${SYSTEM_FRAG}
	UPDATE_PATH=${SDCARD_PATH}${UPDATE_FRAG}
fi

# is there an update available?
if [ -f $UPDATE_PATH ]; then
	FLAG_PATH=/misc/.minstalled
	if [ ! -f $FLAG_PATH ]; then
		echo "INSTALL"
	else
		echo "UPDATE"
	fi
	
	busybox unzip -o $UPDATE_PATH -d $SDCARD_PATH
	rm -f $UPDATE_PATH
	if [ ! -f $FLAG_PATH ]; then
		BAK_PATH=$TF1_PATH/bak
		mkdir -p $BAK_PATH
		cp /misc/modules/gpio_keys_polled.ko $BAK_PATH
		cp /misc/boot_logo.bmp.gz $BAK_PATH
		cp /misc/kernel.dtb $BAK_PATH
		cp /misc/uImage $BAK_PATH
		mount -o remount,rw /dev/block/actb /misc
		rm -f /misc/uImage
		cp $SYSTEM_PATH/dat/uImage /misc
		cp $SYSTEM_PATH/dat/boot_logo.bmp.gz /misc
		cp $SYSTEM_PATH/dat/kernel.dtb /misc
		cp $SYSTEM_PATH/dat/gpio_keys_polled.ko /misc/modules
		touch $FLAG_PATH
		sync && reboot
	fi
fi

ROOTFS_IMAGE=$SYSTEM_PATH/rootfs.ext2
if [ ! -f $ROOTFS_IMAGE ]; then
	# fallback to stock demenu.bin, based on dmenu_ln
	ACT="/tmp/.next"
	CMD="/mnt/vendor/bin/dmenu.bin"
	touch "$ACT"
	while [ -f $CMD ]; do
		if $CMD; then
			if [ -f "$ACT" ]; then
				if  ! sh $ACT; then
					echo
				fi
				rm -f "$ACT"
			fi
		fi
	done
	sync && reboot -p
fi

ROOTFS_MOUNTPOINT=/cfw
LOOPDEVICE=/dev/block/loop7
mkdir $ROOTFS_MOUNTPOINT
busybox losetup $LOOPDEVICE $ROOTFS_IMAGE
mount -r -w -o loop -t ext4 $LOOPDEVICE $ROOTFS_MOUNTPOINT
rm -rf $ROOTFS_MOUNTPOINT/tmp/*
mkdir $ROOTFS_MOUNTPOINT/mnt/mmc
mkdir $ROOTFS_MOUNTPOINT/mnt/sdcard
for f in dev dev/pts proc sys mnt/mmc mnt/sdcard # tmp doesn't work for some reason?
do
	mount -o bind /$f $ROOTFS_MOUNTPOINT/$f
done

export PATH=/usr/sbin:/usr/bin:/sbin:/bin:$PATH
export LD_LIBRARY_PATH=/usr/lib/:/lib/
export HOME=$SDCARD_PATH
busybox chroot $ROOTFS_MOUNTPOINT $SYSTEM_PATH/paks/MinUI.pak/launch.sh &> $SYSTEM_PATH/log.txt

umount $ROOTFS_MOUNTPOINT
busybox losetup --detach $LOOPDEVICE
sync && reboot -p