#!/usr/bin/env bash

# CONSTANTS

CONTAINER_NAME=$1

# FUNCTIONS

function usage {
	echo "$(basename "$0") [CONTAINER_NAME]"
}

function lookup {
	cmd="pvesh get /cluster/resources --type vm --output=json | jq --raw-output '.[] | \"\(.name) \(.vmid)\"'"
	if [[ $CONTAINER_NAME == "--all" ]]; then
		eval "$cmd"
	else
		cmd="$cmd | egrep '^$CONTAINER_NAME '"
		found=$(eval "$cmd") || (echo >&2 "ERROR: container <$CONTAINER_NAME> not found!" && exit 10)
		echo "$found" | cut -d' ' -f2
	fi
}

function list {
	containers=$(lxc-ls "$CONTAINER_NAME")
	for id in $containers; do
		hostname=$(grep -m1 hostname: "/etc/pve/lxc/$id.conf" | cut -d' ' -f2)

		info=$(lxc-info -si $id)
		state=($(lxc-info "$id" | grep ^State:)) && state="${state[1]}" # get an array, then take the second element

		ips_input=($(echo "$info" | grep '^IP:')) || ips_input=()
		ips_result=()
		[[ ${#ips_input[@]} -gt 1 ]] && transform_array_to_odd_values_only ips_input ips_result

		# convert array to string joined by ','
		ips_result=$(
			IFS=","
			builtin echo "${ips_result[*]}"
		)

		printf '%-5s %-30s %s %s\n' "$id" "$hostname" "$state" "$ips_result"
	done
}

function transform_array_to_odd_values_only {
	local -n input=$1
	local -n output=$2

	for i in "${!input[@]}"; do
		((i % 2 == 1)) && output+=("${input[$i]}")
	done
}

# MAIN

set -Eue
# [[ "$#" -lt 1 ]] && usage && exit 1
list