#!/usr/bin/python
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# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
# 
#   http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.


import cloudstack_pluginlib as lib
import logging
import os
import sys
import subprocess
import time
import XenAPIPlugin

sys.path.append("/opt/xensource/sm/")
import util

from time import localtime as _localtime, asctime as _asctime

xePath = "/opt/xensource/bin/xe"
lib.setup_logging("/var/log/cloud/ovs-pvlan.log")
dhcpSetupPath = "/opt/cloud/bin/ovs-pvlan-dhcp-host.sh"
vmSetupPath = "/opt/cloud/bin/ovs-pvlan-vm.sh"
getDhcpIfacePath = "/opt/cloud/bin/ovs-get-dhcp-iface.sh"
pvlanCleanupPath = "/opt/cloud/bin/ovs-pvlan-cleanup.sh"
getBridgePath = "/opt/cloud/bin/ovs-get-bridge.sh"

def echo(fn):
    def wrapped(*v, **k):
        name = fn.__name__
        logging.debug("#### VMOPS enter  %s ####" % name)
        res = fn(*v, **k)
        logging.debug("#### VMOPS exit  %s ####" % name)
        return res
    return wrapped

@echo
def setup_pvlan_dhcp(session, args):
    op = args.pop("op")
    nw_label = args.pop("nw-label")
    primary = args.pop("primary-pvlan")
    isolated = args.pop("isolated-pvlan")
    dhcp_name = args.pop("dhcp-name")
    dhcp_ip = args.pop("dhcp-ip")
    dhcp_mac = args.pop("dhcp-mac")

    res = lib.check_switch()
    if res != "SUCCESS":
        return "FAILURE:%s" % res

    logging.debug("Network is:%s" % (nw_label))
    bridge = lib.do_cmd([getBridgePath, nw_label])
    logging.debug("Determine bridge/switch is :%s" % (bridge))

    if op == "add":
        logging.debug("Try to get dhcp vm %s port on the switch:%s" % (dhcp_name, bridge))
        dhcp_iface = lib.do_cmd([getDhcpIfacePath, bridge, dhcp_name])
        logging.debug("About to setup dhcp vm on the switch:%s" % bridge)
        res = lib.do_cmd([dhcpSetupPath, "-A", "-b", bridge, "-p", primary,
            "-i", isolated, "-n", dhcp_name, "-d", dhcp_ip, "-m", dhcp_mac,
            "-I", dhcp_iface])
	if res:
	    result = "FAILURE:%s" % res
	    return result;
	logging.debug("Setup dhcp vm on switch program done")
    elif op == "delete":
        logging.debug("About to remove dhcp the switch:%s" % bridge)
        res = lib.do_cmd([dhcpSetupPath, "-D", "-b", bridge, "-p", primary,
            "-i", isolated, "-n", dhcp_name, "-d", dhcp_ip, "-m", dhcp_mac])
	if res:
	    result = "FAILURE:%s" % res
	    return result;
	logging.debug("Remove DHCP on switch program done")
    
    result = "true"
    logging.debug("Setup_pvlan_dhcp completed with result:%s" % result)
    return result

@echo
def setup_pvlan_vm(session, args):
    op = args.pop("op")
    nw_label = args.pop("nw-label")
    primary = args.pop("primary-pvlan")
    isolated = args.pop("isolated-pvlan")
    vm_mac = args.pop("vm-mac")
    trunk_port = 1

    res = lib.check_switch()
    if res != "SUCCESS":
        return "FAILURE:%s" % res

    bridge = lib.do_cmd([getBridgePath, nw_label])
    logging.debug("Determine bridge/switch is :%s" % (bridge))

    if op == "add":
        logging.debug("About to setup vm on the switch:%s" % bridge)
        res = lib.do_cmd([vmSetupPath, "-A", "-b", bridge, "-p", primary, "-i", isolated, "-v", vm_mac])
	if res:
	    result = "FAILURE:%s" % res
	    return result;
	logging.debug("Setup vm on switch program done")
    elif op == "delete":
        logging.debug("About to remove vm on the switch:%s" % bridge)
        res = lib.do_cmd([vmSetupPath, "-D", "-b", bridge, "-p", primary, "-i", isolated, "-v", vm_mac])
	if res:
	    result = "FAILURE:%s" % res
	    return result;
	logging.debug("Remove vm on switch program done")

    result = "true"
    logging.debug("Setup_pvlan_vm_alone completed with result:%s" % result)
    return result

@echo
def cleanup(session, args):
    res = lib.check_switch()
    if res != "SUCCESS":
        return "FAILURE:%s" % res

    res = lib.do_cmd([pvlanCleanUpPath])
    if res:
        result = "FAILURE:%s" % res
        return result;

    result = "true"
    logging.debug("Setup_pvlan_vm_dhcp completed with result:%s" % result)
    return result

if __name__ == "__main__":
    XenAPIPlugin.dispatch({"setup-pvlan-dhcp": setup_pvlan_dhcp,
                           "setup-pvlan-vm": setup_pvlan_vm,
                           "cleanup":cleanup})