#!/bin/bash

set -e

DISTROLIST=()
ROOTPATH=
DEVNAME=
KERNELDIR=
DATADIR=
INSTALL_GRUB=1

. functions.sh

msg() {
	echo -e "$1" >&2
}

fatalerror() {
	msg "\x1b[1;31m$1\x1b[0m"
	exit 1
}

usage() {
	msg "$0 --root=<rootpath> --dev=<devname> [--no-grub] [distro 1] [distro 2] ..."
}

while [[ -n "$1" ]]
do
	case "$1" in
		--root=*)
			ROOTPATH=${1/--root=}
			UUID="$(findmnt -o UUID --raw --noheadings $ROOTPATH \
				|| fatalerror "UUID of $ROOTPATH not found, not a mountpoint?")"
			KERNELDIR="$ROOTPATH/liveusb-kernel"
			DATADIR="$ROOTPATH/liveusb-data"
			GRUBCFG="$ROOTPATH/grub/grub.cfg"
			install -d "$KERNELDIR" "$DATADIR"
			msg "Files will be copy to $ROOTPATH"
			;;
		--dev=*)
			DEVNAME=${1/--dev=}
			msg "Boot sector will be written to $DEVNAME"
			;;
		--no-grub)
			INSTALL_GRUB=0
			;;
		*=*|-*)
			usage
			exit 1
			;;
		*)
			if [ -d "distro/$1" ]
			then
				DISTROLIST=(${DISTROLIST[@]} "$1")
			else
				fatalerror "directory distro/$1 not found"
			fi
			;;
	esac
	shift
done

install -d "$ROOTPATH/grub"
echo "uuid=$UUID" > "$GRUBCFG"

for i in ${DISTROLIST[@]}
do
	process_distro "$i"
	if [ -f "isofiles/$ISOFILE" ] && checksum_verify; then
		true
	else
		download_iso
	fi

	install_live
	cat "distro/$i/grub.cfg" >> "$GRUBCFG"
done

if [ "$INSTALL_GRUB" == 1 ]; then
	as-root grub-install --boot-directory="$ROOTPATH" --target=i386-pc "$DEVNAME"
	as-root grub-install --boot-directory="$ROOTPATH" --efi-directory="$ROOTPATH" --bootloader-id=grub --target=x86_64-efi --removable --no-nvram "$DEVNAME"
fi