# Program entry point
#
# Copyright (C) 2015  Patrick "P. J." McDermott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -u

usage()
{
	printf 'Usage: %s [option ...]\n' "${0}"
}

help()
{
	usage
	cat <<EOF
Options:
  -h            Display this information
  -V            Display version information
  -i {cli|tui}  Select either a textual user interface or a command line
                interface (default: cli)
  -o <file>     Log output to <file>
EOF
}

version()
{
	cat <<EOF
firman ${PACKAGE_VERSION}
Copyright (C) 2015  Patrick "P. J." McDermott
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
EOF
}

main()
{
	local opt=
	local ui='cli'

	unset OPTARG
	while getopts 'hVi:o:' opt; do
		case "${opt}" in
			'h')
				help
				exit
				;;
			'V')
				version
				exit
				;;
			'i')
				ui="${OPTARG}"
				;;
			'o')
				log_init "${OPTARG}"
				;;
		esac
		unset OPTARG
	done
	shift $(($OPTIND - 1))

	if [ ${#} -ne 0 ]; then
		usage >&2
		exit 1
	fi

	if ! init_ui "${ui}"; then
		exit 1
	fi
	srand $(expr ${$} + $(date '+%s'))
	init_temp_dir

	while :; do
		case "$(show_menu 'Firmware Manager' 'Update firmware' \
				'Exit')" in
			0)
				do_update
				;;
			1)
				info 'Exiting'
				break
				;;
		esac
	done

	fini_temp_dir
	exit_ui

	return 0
}