#!/usr/bin/env python3
# -*- coding: utf-8 -*-
#
# 2020 Nico Schottelius (nico.schottelius at ungleich.ch)
#
# This file is part of uncloud.
#
# uncloud 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.
#
# uncloud 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 uncloud. If not, see <http://www.gnu.org/licenses/>.
#
#

import subprocess
import uuid
import os

from uncloud.hack.db import DB
from uncloud.hack.mac import MAC

class VM(object):
    def __init__(self, config):
       self.config = config
       self.db = DB(config, prefix="/vm")

       #TODO: Select generic 
       self.hackprefix="/home/nico/vcs/uncloud/uncloud/hack/hackcloud" #TODO: Should be removed midterm
       self.qemu="/usr/bin/qemu-system-x86_64" #TODO: should be in config
       self.accel="kvm" #TODO: should be config

       self.vm = {}


       #TODO: this should be generic
       self.vm['owner']="nico" #TODO: Should in config.arguments
       #self.config['vni_hex'] = "{:x}".format(self.config.vni)
       #self.config['bridgedev'] = "br{}".format(self.config['vni_hex'])
       self.vni_hex = "{:x}".format(self.config.arguments['vni'])
       self.bridgedev = "br{}".format(self.vni_hex)


       #TODO: Touch later! (when necessary)
       self.ifup = os.path.join(self.hackprefix, "ifup.sh")
       self.ifdown = os.path.join(self.hackprefix, "ifdown.sh")

    def create(self):
       self.uuid = uuid.uuid4()
       #TODO: This all should be generic
       self.vm['uuid'] = str(self.uuid)
       self.vm['memory'] = 1024
       self.vm['cores'] = 2
       self.vm['os_image'] = os.path.join(self.hackprefix, "alpine-virt-3.11.2-x86_64.iso")

       self.mac=MAC(self.config).get_next()

       self.vm['commandline' ] = [ "sudo",
                                   "{}".format(self.qemu),
                                   "-name", "uncloud-{}".format(self.vm['uuid']),
                                   "-machine", "pc,accel={}".format(self.accel),
                                   "-m", "{}".format(self.vm['memory']),
                                   "-smp", "{}".format(self.vm['cores']),
                                   "-uuid", "{}".format(self.vm['uuid']),
                                   "-drive", "file={},media=cdrom".format(self.vm['os_image']),
                                   "-netdev", "tap,id=netmain,script={},downscript={},ifname={}".format(self.ifup, self.ifdown),self.mac,
                                   "-device", "virtio-net-pci,netdev=netmain,id=net0,mac={}".format(self.mac)
       ]

       self.db.set(str(self.vm['uuid']),
                   self.vm,
                   as_json=True)

       print(" ".join(self.vm['commandline']))
       subprocess.run(self.vm['commandline'])