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# CLI user interface
#
# 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/>.

cli_dbg()
{
	local fmt="${1}"
	shift 1

	printf "Debug: ${fmt}\n" "${@}"
}

cli_info()
{
	local fmt="${1}"
	shift 1

	printf "${fmt}\n" "${@}"
}

cli_warn()
{
	local fmt="${1}"
	shift 1

	printf "Warning: ${fmt}\n" "${@}" >&2
}

cli_err()
{
	local fmt="${1}"
	shift 1

	printf "Error: ${fmt}\n" "${@}" >&2
}

cli_show_menu()
{
	local title="${1}"
	shift 1
	local i=
	local l=
	local label=

	printf '%s\n' "${title}" >"$(tty)"
	{ printf '%s\n' "${title}" | sed 's/./-/g'; } >"$(tty)"

	while :; do
		printf '\n' >"$(tty)"
		i=0
		l=${#}
		for label in "${@}"; do
			i=$(($i + 1))
			printf '  %4d: %s\n' "${i}" "${label}" >"$(tty)"
		done
		printf '\n> ' >"$(tty)"
		if ! read -r i <"$(tty)"; then
			continue
		fi
		case "${i}" in
			*[!0-9]* | '')
				continue
				;;
		esac
		if [ ${i} -le 0 ] || [ ${i} -gt ${l} ]; then
			continue
		fi
		i=$(($i - 1))
		printf '%d' "${i}"
		return 0
	done
}