#!/bin/sh

. ${CIRROS_LIB:=/lib/cirros/shlib_cirros} ||
	{ echo "failed to read ${CIRROS_LIB}" 1>&2; exit 1; }

Usage() {
	cat <<EOF
Usage: ${0##*/} command [options]

   commands:
     datasource:  list the datasource name
     dsmode:      list the datasource mode ('net', or 'local')
     available:   list available fields for datasource
     get field:   dump field
EOF
}

cirros_query() {
	local short_opts="hqv"
	local long_opts="help,quiet,verbose"
	local getopt_out=""
	getopt_out=$(getopt --name "${0##*/}" \
		--options "${short_opts}" --long "${long_opts}" -- "$@") &&
		eval set -- "${getopt_out}" ||
		{ bad_Usage; return; }

	local cur="" next="" command="" VERBOSITY
	while [ $# -ne 0 ]; do
		cur=${1}; next=${2};
		case "$cur" in
			-h|--help) Usage ; exit 0;;
			-v|--verbose) VERBOSITY=$((${VERBOSITY}+1));;
			-q|--quiet) VERBOSITY=0;;
			--) shift; break;;
		esac
		shift;
	done

	[ $# -ne 0 ] || { bad_Usage "must provide arguments"; return; }

	local command="$1" dsname="" dsmode="" start_d="$PWD"

	assert_datasource ||
		{ debug 1 "no datasource"; return 1; }
	dsname="${_DATASOURCE_NAME}"
	dsmode="${_DATASOURCE_MODE}"

	if [ "$command" = "datasource" ]; then
		[ $# -eq 1 ] ||
			{ error "confused by '$2' to mode $command"; return 1; }
		echo "$dsname"
		return
	elif [ "$command" = "dsmode" ]; then
		[ $# -eq 1 ] ||
			{ error "confused by '$2' to mode $command"; return 1; }
		echo "$dsmode"
		return
	elif [ "$command" = "available" ]; then
		[ $# -eq 1 ] ||
			{ error "confused by '$2' to mode $command"; return 1; }
		ds_list_items ||
			{ error "failed to list items"; return 1; }
		echo "$_RET"
		return
	elif [ "$command" = "get" ]; then
		[ "$#" -eq 2 ] || fail "can only query 1 item at a time"
		ds_cat_item "$2"
		return
	else
		error "unknown command '$command'"
	fi

	return 1
}

cirros_query "$@"

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