#!/usr/bin/env python
#
# Copyright (C) 2016 GNS3 Technologies Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

import asyncio


from .link import Link


class UDPLink(Link):
    @asyncio.coroutine
    def create(self):
        """
        Create the link on the VMs
        """
        vm1 = self._vms[0]["vm"]
        adapter_number1 = self._vms[0]["adapter_number"]
        port_number1 = self._vms[0]["port_number"]
        vm2 = self._vms[1]["vm"]
        adapter_number2 = self._vms[1]["adapter_number"]
        port_number2 = self._vms[1]["port_number"]

        # Reserve a UDP port on both side
        response = yield from vm1.hypervisor.post("/projects/{}/ports/udp".format(self._project.id))
        vm1_port = response.json["udp_port"]
        response = yield from vm2.hypervisor.post("/projects/{}/ports/udp".format(self._project.id))
        vm2_port = response.json["udp_port"]

        # Create the tunnel on both side
        data = {
            "lport": vm1_port,
            "rhost": vm2.hypervisor.host,
            "rport": vm2_port,
            "type": "nio_udp"
        }
        yield from vm1.post("/adapters/{adapter_number}/ports/{port_number}/nio".format(adapter_number=adapter_number1, port_number=port_number1), data=data)

        data = {
            "lport": vm2_port,
            "rhost": vm1.hypervisor.host,
            "rport": vm1_port,
            "type": "nio_udp"
        }
        yield from vm2.post("/adapters/{adapter_number}/ports/{port_number}/nio".format(adapter_number=adapter_number2, port_number=port_number2), data=data)