#!/bin/bash


MOUNT_PATH="/media/znb"
TCOS_PATH="/var/lib/tcos/tftp/modelo-"
SQUASH_PATH="/var/lib/tcos/tftp/"
MANIFEST_FILE="casper/filesystem.manifest"
MANIFEST_SERVER="casper/server.manifest"
MANIFEST_CLIENT="casper/client.manifest"
MANIFEST_CENTRO="casper/centro.manifest"
MANIFEST_BIBLIO="casper/biblioteca.manifest"
PACKAGES_FILE="casper/packages.txt"

_die()
{
	echo "$1"
	exit 1
}

_usage()
{
	echo "/usr/sbin/znb-mounter mount ISO_PATH"
	echo "/usr/sbin/znb_mounter update-nfs"
	echo "/usr/sbin/znb_mounter unsquashfs SQUASHFILE"
	exit 1
}

_sanity_checks()
{
	# Sanity checks.
	[ -r "$ISO_PATH" ] || _usage "Not found ISO on : $ISO_PATH"

	# Check mountpoint
	mkdir -p "$MOUNT_PATH"
	umount -f -l "$MOUNT_PATH" 2>/dev/null || true
}


_mount_iso()
{
	mount -o loop "$ISO_PATH"  "$MOUNT_PATH"
}

_umount_iso()
{
	umount -f -l "$MOUNT_PATH" 2>/dev/null || true
}

_do_unsquashfs()
{
	# Unsquashfs file
	[ $1 ] || _die "Model type not found"
	FLAVOUR_DIR="${SQUASH_PATH}$1"
	[ -d $FLAVOUR_DIR ] || _die "File $FLAVOUR_DIR not found"

	for SQUASHFSFILE in $(ls $FLAVOUR_DIR/casper/*.squashfs); do
		SQUASHFSFILE="$1"
		SQUASHFSDIR="$(dirname $SQUASHFSFILE)/$(basename $SQUASHFSFILE '.squashfs').dir"
		logger -t "znb_mounter" "Ready to extract squashfile on $SQUASHFSDIR"
		unsquashfs $SQUASHFSFILE -d  $SQUASHFSDIR
	done
}

_get_manifest_of_iso()
{

	if [ -r "$MOUNT_PATH"/"$MANIFEST_SERVER" ] && [ -r "$MOUNT_PATH"/"$MANIFEST_CLIENT" ]; then
		MANIFEST="$MOUNT_PATH"/"$MANIFEST_CENTRO"
	elif [  -r "$MOUNT_PATH"/"$MANIFEST_CLIENT" ]  ; then
		MANIFEST="$MOUNT_PATH"/"$MANIFEST_CLIENT"
	elif [ -r "$MOUNT_PATH"/"$MANIFEST_SERVER" ]  ; then
		version=$(cat "$MOUNT_PATH"/"$PACKAGES_FILE" | grep llxcfg-biblioteca | tr -s " " | cut -d " " -f3| head -1)
		if [ -z $version ]; then
			MANIFEST="$MOUNT_PATH"/"$MANIFEST_SERVER"
		else 
			MANIFEST="$MOUNT_PATH"/"$MANIFEST_BIBLIO"
		fi
	elif [ -r "$MOUNT_PATH"/"$MANIFEST_FILE" ]  ; then
		MANIFEST="$MOUNT_PATH"/"$MANIFEST_FILE"
	else
		echo "Mount path: $MOUNT_PATH not contains manifest file"
	fi
}

_get_version_of_iso()
{
	if [ -r "$MOUNT_PATH"/"$PACKAGES_FILE" ] ; then
		CDD_VERSION=$(cat "$MOUNT_PATH"/"$PACKAGES_FILE" | grep lliurex-cdd | tr -s " " | cut -d " " -f3| head -1)

	fi
}

_show_results()
{
	echo "MOUNT_PATH=$MOUNT_PATH"
	echo "MANIFEST=$MANIFEST"
	echo "CDD_VERSION=$CDD_VERSION"
}

_update_nfs()
{
	llxcfg-nfs update
}

_update_pxe()
{
	gentcos -parse-pxelinuxcfg 2>/dev/null
}

# MAIN
ACTION="$1"
shift

ISO_PATH="$1"
case "$ACTION" in 
	mount)
		_sanity_checks
		_mount_iso
		_get_manifest_of_iso
		_get_version_of_iso
		_show_results
		exit 0
		;;
	umount)
		_umount_iso
		exit 0
		;;
	update-nfs)
		_update_nfs
		exit 0
		;;
	unsquashfs)
		echo "DEBUG: unsquashfs called"
		_do_unsquashfs $1
		exit 0
		;;
	update-pxe)
		_update_pxe
		exit 0
		;;
	*)
		_usage
		;;
esac

exit 0