#
# Setup fstab and initramfs
#

# Load utility functions
. ./functions.sh

# Install and setup fstab
install_readonly files/mount/fstab "${ETC_DIR}/fstab"

# Add usb/sda disk root partition to fstab
if [ "$ENABLE_SPLITFS" = true ] && [ "$ENABLE_CRYPTFS" = false ] ; then
  sed -i "s/mmcblk0p2/sda1/" "${ETC_DIR}/fstab"
fi

# Add encrypted root partition to fstab and crypttab
if [ "$ENABLE_CRYPTFS" = true ] ; then
  # Replace fstab root partition with encrypted partition mapping
  sed -i "s/mmcblk0p2/mapper\/${CRYPTFS_MAPPING}/" "${ETC_DIR}/fstab"

  # Add encrypted partition to crypttab and fstab
  install_readonly files/mount/crypttab "${ETC_DIR}/crypttab"
  echo "${CRYPTFS_MAPPING} /dev/mmcblk0p2 none luks,initramfs" >> "${ETC_DIR}/crypttab"

  if [ "$ENABLE_SPLITFS" = true ] ; then
    # Add usb/sda1 disk to crypttab
    sed -i "s/mmcblk0p2/sda1/" "${ETC_DIR}/crypttab"
  fi
fi

if [ "$ENABLE_USBBOOT" = true ] ; then
  sed -i "s/mmcblk0p1/sda1/" "${ETC_DIR}/fstab"
  sed -i "s/mmcblk0p2/sda2/" "${ETC_DIR}/fstab"

  # Add usb/sda2 disk to crypttab
  if [ "$ENABLE_CRYPTFS" = true ] ; then
	sed -i "s/mmcblk0p2/sda2/" "${ETC_DIR}/crypttab"
  fi
fi

# Generate initramfs file
if [ "$ENABLE_INITRAMFS" = true ] ; then
	if [ "$ENABLE_CRYPTFS" = true ] ; then
		# Include initramfs scripts to auto expand encrypted root partition
		if [ "$EXPANDROOT" = true ] ; then
			install_exec files/initramfs/expand_encrypted_rootfs "${ETC_DIR}/initramfs-tools/scripts/init-premount/expand_encrypted_rootfs"
			install_exec files/initramfs/expand-premount "${ETC_DIR}/initramfs-tools/scripts/local-premount/expand-premount"
			install_exec files/initramfs/expand-tools "${ETC_DIR}/initramfs-tools/hooks/expand-tools"
		fi
	
		if [ "$ENABLE_DHCP" = false ] ; then
			# Get cdir from NET_ADDRESS e.g. 24
			cdir=$(printf ${NET_ADDRESS} | cut -d '/' -f2)

			# Convert cdir ro netmask e.g. 24 to 255.255.255.0
			NET_MASK=$(cdr2mask "$cdir")
	
			# Write static ip settings to "${ETC_DIR}"/initramfs-tools/initramfs.conf
			sed -i "\$aIP=${NET_ADDRESS}::${NET_GATEWAY}:${NET_MASK}:${HOSTNAME}:" "${ETC_DIR}"/initramfs-tools/initramfs.conf
		fi

		if [ "$CRYPTFS_DROPBEAR" = true ]; then
			if [ -n "$CRYPTFS_DROPBEAR_PUBKEY" ] && [ -f "$CRYPTFS_DROPBEAR_PUBKEY" ] ; then
				install_readonly "${CRYPTFS_DROPBEAR_PUBKEY}" "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub
				cat "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub >> "${ETC_DIR}"/dropbear-initramfs/authorized_keys
			else
				# Create key
				chroot_exec /usr/bin/dropbearkey -t rsa -f /etc/dropbear-initramfs/id_rsa.dropbear

				# Convert dropbear key to openssh key
				chroot_exec /usr/lib/dropbear/dropbearconvert dropbear openssh /etc/dropbear-initramfs/id_rsa.dropbear /etc/dropbear-initramfs/id_rsa

				# Get Public Key Part
				chroot_exec /usr/bin/dropbearkey -y -f /etc/dropbear-initramfs/id_rsa.dropbear | chroot_exec tee /etc/dropbear-initramfs/id_rsa.pub

				# Delete unwanted lines
				sed -i '/Public/d' "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub
				sed -i '/Fingerprint/d' "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub

				# Trust the new key
				cat "${ETC_DIR}"/dropbear-initramfs/id_rsa.pub > "${ETC_DIR}"/dropbear-initramfs/authorized_keys

				# Save Keys - convert with putty from rsa/openssh to puttkey
				cp -f "${ETC_DIR}"/dropbear-initramfs/id_rsa "${BASEDIR}"/dropbear_initramfs_key.rsa
			fi
		
			# Get unlock script
			install_exec files/initramfs/crypt_unlock.sh "${ETC_DIR}"/initramfs-tools/hooks/crypt_unlock.sh

			# Enable Dropbear inside initramfs
			printf "#\n# DROPBEAR: [ y | n ]\n#\n\nDROPBEAR=y\n" >> "${ETC_DIR}/initramfs-tools/initramfs.conf"

			# Enable Dropbear inside initramfs
			sed -i "54 i sleep 5" "${R}"/usr/share/initramfs-tools/scripts/init-premount/dropbear
		else
			# Disable SSHD inside initramfs
			printf "#\n# DROPBEAR: [ y | n ]\n#\n\nDROPBEAR=n\n" >> "${ETC_DIR}/initramfs-tools/initramfs.conf"
		fi

		# Add cryptsetup modules to initramfs
		printf "#\n# CRYPTSETUP: [ y | n ]\n#\n\nCRYPTSETUP=y\n" >> "${ETC_DIR}/initramfs-tools/conf-hook"

		# Dummy mapping required by mkinitramfs
		echo "0 1 crypt $(echo "${CRYPTFS_CIPHER}" | cut -d ':' -f 1) ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff 0 7:0 4096" | chroot_exec dmsetup create "${CRYPTFS_MAPPING}"

		# Remove dummy mapping
		chroot_exec cryptsetup close "${CRYPTFS_MAPPING}"
	fi
	# Generate initramfs without encrypted root partition support
	chroot_exec mkinitramfs -o "/boot/firmware/initramfs-${KERNEL_VERSION}" "${KERNEL_VERSION}"
fi