#!/bin/bash

#=================================================
# LXD HELPERS
#=================================================

ynh_lxc_stop () {
	local container_to_stop=$1
	# (We also use timeout 30 in front of the command because sometime lxc
	# commands can hang forever despite the --timeout >_>...)
	timeout 30 lxc stop --timeout 15 $container_to_stop 2>/dev/null

	# If the command times out, then add the option --force
	if [ $? -eq 124 ]; then
		timeout 30 lxc stop --timeout 15 $container_to_stop --force 2>/dev/null
	fi

}

ynh_lxc_snapshot_exists () {
	local snapname=$1
	lxc list --format json \
		| jq -e --arg LXC_NAME $LXC_NAME --arg snapname $snapname \
		'.[] | select(.name==$LXC_NAME) | .snapshots[] | select(.name==$snapname)' \
			>/dev/null
}

ynh_lxc_snapshot_load () {
	local snapname=$1
	log_debug "Loading snapshot $snapname ..."

	# Remove swap files before restoring the snapshot.
	CLEAN_SWAPFILES

	ynh_lxc_stop $LXC_NAME

	lxc restore $LXC_NAME $snapname
	lxc start $LXC_NAME
	_LXC_START_AND_WAIT $LXC_NAME
}

ynh_lxc_reset () {
	# If the container exists
	if lxc info $LXC_NAME >/dev/null 2>/dev/null; then
		# Remove swap files before deletting the continer
		CLEAN_SWAPFILES
	fi 

	ynh_lxc_stop $LXC_NAME

	if lxc info $LXC_NAME >/dev/null 2>/dev/null; then
		local current_storage=$(lxc list $LXC_NAME --format json --columns b | jq '.[].expanded_devices.root.pool')
		swapoff "$(lxc storage get $current_storage source)/containers/$LXC_NAME/rootfs/swap" 2>/dev/null
	fi 

	lxc delete $LXC_NAME --force 2>/dev/null
}