import os
import base64
from planetstack.config import Config
from observer.openstacksyncstep import OpenStackSyncStep
from core.models.network import *

class SyncNetworkSlivers(OpenStackSyncStep):
	requested_interval = 3600
	provides=[NetworkSliver]

	def call(self):
		networkSlivers = NetworkSliver.objects.all()
		networkSlivers_by_id = {}
		networkSlivers_by_port = {}
		for networkSliver in networkSlivers:
			networkSlivers_by_id[networkSliver.id] = networkSliver
			networkSlivers_by_port[networkSliver.port_id] = networkSliver

		networks = Network.objects.all()
		networks_by_id = {}
		for network in networks:
			networks_by_id[network.network_id] = network

		slivers = Sliver.objects.all()
		slivers_by_instance_id = {}
		for sliver in slivers:
			slivers_by_instance_id[sliver.instance_id] = sliver

		ports = self.driver.shell.quantum.list_ports()["ports"]
		for port in ports:
			if port["id"] in networkSlivers_by_port:
				# we already have it
				print "already accounted for port", port["id"]
				continue

			if port["device_owner"] != "compute:nova":
				# we only want the ports that connect to instances
				continue

			network = networks_by_id.get(port['network_id'], None)
			if not network:
				#print "no network for port", port["id"], "network", port["network_id"]
				continue

			sliver = slivers_by_instance_id.get(port['device_id'], None)
			if not sliver:
				print "no sliver for port", port["id"], "device_id", port['device_id']
				continue

			if network.template.sharedNetworkId is not None:
				# If it's a shared network template, then more than one network
				# object maps to the quantum network. We have to do a whole bunch
				# of extra work to find the right one.
				networks = network.template.network_set.all()
				network = None
				for candidate_network in networks:
					if (candidate_network.owner == sliver.slice):
						print "found network", candidate_network
						network = candidate_network

				if not network:
					print "failed to find the correct network for a shared template for port", port["id"], "network", port["network_id"]
					continue

			if not port["fixed_ips"]:
				print "port", port["id"], "has no fixed_ips"
				continue

#			 print "XXX", port

			ns = NetworkSliver(network=network,
							   sliver=sliver,
							   ip=port["fixed_ips"][0]["ip_address"],
							   port_id=port["id"])
			ns.save()