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# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file 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.
"""
Gandi driver for compute
"""
from datetime import datetime

from libcloud.common.gandi import BaseGandiDriver, GandiException,\
    NetworkInterface, IPAddress, Disk
from libcloud.compute.base import KeyPair
from libcloud.compute.base import StorageVolume
from libcloud.compute.types import NodeState, Provider
from libcloud.compute.base import Node, NodeDriver
from libcloud.compute.base import NodeSize, NodeImage, NodeLocation


NODE_STATE_MAP = {
    'running': NodeState.RUNNING,
    'halted': NodeState.TERMINATED,
    'paused': NodeState.TERMINATED,
    'locked': NodeState.TERMINATED,
    'being_created': NodeState.PENDING,
    'invalid': NodeState.UNKNOWN,
    'legally_locked': NodeState.PENDING,
    'deleted': NodeState.TERMINATED
}

NODE_PRICE_HOURLY_USD = 0.02

INSTANCE_TYPES = {
    'small': {
        'id': 'small',
        'name': 'Small instance',
        'cpu': 1,
        'memory': 256,
        'disk': 3,
        'bandwidth': 10240,
    },
    'medium': {
        'id': 'medium',
        'name': 'Medium instance',
        'cpu': 1,
        'memory': 1024,
        'disk': 20,
        'bandwidth': 10240,
    },
    'large': {
        'id': 'large',
        'name': 'Large instance',
        'cpu': 2,
        'memory': 2048,
        'disk': 50,
        'bandwidth': 10240,
    },
    'x-large': {
        'id': 'x-large',
        'name': 'Extra Large instance',
        'cpu': 4,
        'memory': 4096,
        'disk': 100,
        'bandwidth': 10240,
    },
}


class GandiNodeDriver(BaseGandiDriver, NodeDriver):
    """
    Gandi node driver

    """
    api_name = 'gandi'
    friendly_name = 'Gandi.net'
    website = 'http://www.gandi.net/'
    country = 'FR'
    type = Provider.GANDI
    # TODO : which features to enable ?
    features = {}

    def __init__(self, *args, **kwargs):
        """
        @inherits: :class:`NodeDriver.__init__`
        """
        super(GandiNodeDriver, self).__init__(*args, **kwargs)

    def _resource_info(self, type, id):
        try:
            obj = self.connection.request('hosting.%s.info' % type, int(id))
            return obj.object
        except Exception as e:
            raise GandiException(1003, e)

    def _node_info(self, id):
        return self._resource_info('vm', id)

    def _volume_info(self, id):
        return self._resource_info('disk', id)

    # Generic methods for driver
    def _to_node(self, vm):
        return Node(
            id=vm['id'],
            name=vm['hostname'],
            state=NODE_STATE_MAP.get(
                vm['state'],
                NodeState.UNKNOWN
            ),
            public_ips=vm.get('ips', []),
            private_ips=[],
            driver=self,
            extra={
                'ai_active': vm.get('ai_active'),
                'datacenter_id': vm.get('datacenter_id'),
                'description': vm.get('description')
            }
        )

    def _to_nodes(self, vms):
        return [self._to_node(v) for v in vms]

    def _to_volume(self, disk):
        extra = {'can_snapshot': disk['can_snapshot']}
        return StorageVolume(
            id=disk['id'],
            name=disk['name'],
            size=int(disk['size']),
            driver=self,
            extra=extra)

    def _to_volumes(self, disks):
        return [self._to_volume(d) for d in disks]

    def list_nodes(self):
        """
        Return a list of nodes in the current zone or all zones.

        :return:  List of Node objects
        :rtype:   ``list`` of :class:`Node`
        """
        vms = self.connection.request('hosting.vm.list').object
        ips = self.connection.request('hosting.ip.list').object
        for vm in vms:
            vm['ips'] = []
            for ip in ips:
                if vm['ifaces_id'][0] == ip['iface_id']:
                    ip = ip.get('ip', None)
                    if ip:
                        vm['ips'].append(ip)

        nodes = self._to_nodes(vms)
        return nodes

    def ex_get_node(self, node_id):
        """
        Return a Node object based on a node id.

        :param  name: The ID of the node
        :type   name: ``int``

        :return:  A Node object for the node
        :rtype:   :class:`Node`
        """
        vm = self.connection.request('hosting.vm.info', int(node_id)).object
        ips = self.connection.request('hosting.ip.list').object
        vm['ips'] = []
        for ip in ips:
            if vm['ifaces_id'][0] == ip['iface_id']:
                ip = ip.get('ip', None)
                if ip:
                    vm['ips'].append(ip)
        node = self._to_node(vm)
        return node

    def reboot_node(self, node):
        """
        Reboot a node.

        :param  node: Node to be rebooted
        :type   node: :class:`Node`

        :return:  True if successful, False if not
        :rtype:   ``bool``
        """
        op = self.connection.request('hosting.vm.reboot', int(node.id))
        self._wait_operation(op.object['id'])
        vm = self._node_info(int(node.id))
        if vm['state'] == 'running':
            return True
        return False

    def destroy_node(self, node):
        """
        Destroy a node.

        :param  node: Node object to destroy
        :type   node: :class:`Node`

        :return:  True if successful
        :rtype:   ``bool``
        """
        vm = self._node_info(node.id)
        if vm['state'] == 'running':
            # Send vm_stop and wait for accomplish
            op_stop = self.connection.request('hosting.vm.stop', int(node.id))
            if not self._wait_operation(op_stop.object['id']):
                raise GandiException(1010, 'vm.stop failed')
            # Delete
        op = self.connection.request('hosting.vm.delete', int(node.id))
        if self._wait_operation(op.object['id']):
            return True
        return False

    def deploy_node(self, **kwargs):
        """
        deploy_node is not implemented for gandi driver

        :rtype: ``bool``
        """
        raise NotImplementedError(
            'deploy_node not implemented for gandi driver')

    def create_node(self, name, size, image, location=None, login=None,
                    password=None, inet_family=4, keypairs=None):
        """
        Create a new Gandi node

        :keyword    name:   String with a name for this new node (required)
        :type       name:   ``str``

        :keyword    image:  OS Image to boot on node. (required)
        :type       image:  :class:`NodeImage`

        :keyword    location: Which data center to create a node in. If empty,
                              undefined behavior will be selected. (optional)
        :type       location: :class:`NodeLocation`

        :keyword    size:   The size of resources allocated to this node.
                            (required)
        :type       size:   :class:`NodeSize`

        :keyword    login: user name to create for login on machine (required)
        :type       login: ``str``

        :keyword    password: password for user that'll be created (required)
        :type       password: ``str``

        :keyword    inet_family: version of ip to use, default 4 (optional)
        :type       inet_family: ``int``

        :keyword    keypairs: IDs of keypairs or Keypairs object
        :type       keypairs: list of ``int`` or :class:`.KeyPair`

        :rtype: :class:`Node`
        """
        keypairs = keypairs or []

        if not login and not keypairs:
            raise GandiException(1020, "Login and password or ssh keypair "
                                 "must be defined for node creation")

        if location and isinstance(location, NodeLocation):
            dc_id = int(location.id)
        else:
            raise GandiException(
                1021, 'location must be a subclass of NodeLocation')

        if not size and not isinstance(size, NodeSize):
            raise GandiException(
                1022, 'size must be a subclass of NodeSize')

        keypair_ids = [
            k if isinstance(k, int) else k.extra['id']
            for k in keypairs
        ]

        # If size name is in INSTANCE_TYPE we use new rating model
        instance = INSTANCE_TYPES.get(size.id)
        cores = instance['cpu'] if instance else int(size.id)

        src_disk_id = int(image.id)

        disk_spec = {
            'datacenter_id': dc_id,
            'name': 'disk_%s' % name
        }

        vm_spec = {
            'datacenter_id': dc_id,
            'hostname': name,
            'memory': int(size.ram),
            'cores': cores,
            'bandwidth': int(size.bandwidth),
            'ip_version': inet_family,
        }

        if login and password:
            vm_spec.update({
                'login': login,
                'password': password,  # TODO : use NodeAuthPassword
            })
        if keypair_ids:
            vm_spec['keys'] = keypair_ids

        # Call create_from helper api. Return 3 operations : disk_create,
        # iface_create,vm_create
        (op_disk, op_iface, op_vm) = self.connection.request(
            'hosting.vm.create_from',
            vm_spec, disk_spec, src_disk_id
        ).object

        # We wait for vm_create to finish
        if self._wait_operation(op_vm['id']):
            # after successful operation, get ip information
            # thru first interface
            node = self._node_info(op_vm['vm_id'])
            ifaces = node.get('ifaces')
            if len(ifaces) > 0:
                ips = ifaces[0].get('ips')
                if len(ips) > 0:
                    node['ip'] = ips[0]['ip']
            return self._to_node(node)

        return None

    def _to_image(self, img):
        return NodeImage(
            id=img['disk_id'],
            name=img['label'],
            driver=self.connection.driver
        )

    def list_images(self, location=None):
        """
        Return a list of image objects.

        :keyword    location: Which data center to filter a images in.
        :type       location: :class:`NodeLocation`

        :return:  List of GCENodeImage objects
        :rtype:   ``list`` of :class:`GCENodeImage`
        """
        try:
            if location:
                filtering = {'datacenter_id': int(location.id)}
            else:
                filtering = {}
            images = self.connection.request('hosting.image.list', filtering)
            return [self._to_image(i) for i in images.object]
        except Exception as e:
            raise GandiException(1011, e)

    def _to_size(self, id, size):
        return NodeSize(
            id=id,
            name='%s cores' % id,
            ram=size['memory'],
            disk=size['disk'],
            bandwidth=size['bandwidth'],
            price=(self._get_size_price(size_id='1') * id),
            driver=self.connection.driver,
        )

    def _instance_type_to_size(self, instance):
        return NodeSize(
            id=instance['id'],
            name=instance['name'],
            ram=instance['memory'],
            disk=instance['disk'],
            bandwidth=instance['bandwidth'],
            price=self._get_size_price(size_id=instance['id']),
            driver=self.connection.driver,
        )

    def list_instance_type(self, location=None):
        return [self._instance_type_to_size(instance)
                for name, instance in INSTANCE_TYPES.items()]

    def list_sizes(self, location=None):
        """
        Return a list of sizes (machineTypes) in a zone.

        :keyword  location: Which data center to filter a sizes in.
        :type     location: :class:`NodeLocation` or ``None``

        :return:  List of NodeSize objects
        :rtype:   ``list`` of :class:`NodeSize`
        """
        account = self.connection.request('hosting.account.info').object
        if account.get('rating_enabled'):
            # This account use new rating model
            return self.list_instance_type(location)
        # Look for available shares, and return a list of share_definition
        available_res = account['resources']['available']

        if available_res['shares'] == 0:
            return None
        else:
            share_def = account['share_definition']
            available_cores = available_res['cores']
            # 0.75 core given when creating a server
            max_core = int(available_cores + 0.75)
            shares = []
            if available_res['servers'] < 1:
                # No server quota, no way
                return shares
            for i in range(1, max_core + 1):
                share = {id: i}
                share_is_available = True
                for k in ['memory', 'disk', 'bandwidth']:
                    if share_def[k] * i > available_res[k]:
                        # We run out for at least one resource inside
                        share_is_available = False
                    else:
                        share[k] = share_def[k] * i
                if share_is_available:
                    nb_core = i
                    shares.append(self._to_size(nb_core, share))
            return shares

    def _to_loc(self, loc):
        return NodeLocation(
            id=loc['id'],
            name=loc['dc_code'],
            country=loc['country'],
            driver=self
        )

    def list_locations(self):
        """
        Return a list of locations (datacenters).

        :return: List of NodeLocation objects
        :rtype: ``list`` of :class:`NodeLocation`
        """
        res = self.connection.request('hosting.datacenter.list')
        return [self._to_loc(loc) for loc in res.object]

    def list_volumes(self):
        """
        Return a list of volumes.

        :return: A list of volume objects.
        :rtype: ``list`` of :class:`StorageVolume`
        """
        res = self.connection.request('hosting.disk.list', {})
        return self._to_volumes(res.object)

    def ex_get_volume(self, volume_id):
        """
        Return a Volume object based on a volume ID.

        :param  volume_id: The ID of the volume
        :type   volume_id: ``int``

        :return:  A StorageVolume object for the volume
        :rtype:   :class:`StorageVolume`
        """
        res = self.connection.request('hosting.disk.info', volume_id)
        return self._to_volume(res.object)

    def create_volume(self, size, name, location=None, snapshot=None):
        """
        Create a volume (disk).

        :param  size: Size of volume to create (in GB).
        :type   size: ``int``

        :param  name: Name of volume to create
        :type   name: ``str``

        :keyword  location: Location (zone) to create the volume in
        :type     location: :class:`NodeLocation` or ``None``

        :keyword  snapshot: Snapshot to create image from
        :type     snapshot: :class:`Snapshot`

        :return:  Storage Volume object
        :rtype:   :class:`StorageVolume`
        """
        disk_param = {
            'name': name,
            'size': int(size),
            'datacenter_id': int(location.id)
        }
        if snapshot:
            op = self.connection.request('hosting.disk.create_from',
                                         disk_param, int(snapshot.id))
        else:
            op = self.connection.request('hosting.disk.create', disk_param)
        if self._wait_operation(op.object['id']):
            disk = self._volume_info(op.object['disk_id'])
            return self._to_volume(disk)
        return None

    def attach_volume(self, node, volume, device=None):
        """
        Attach a volume to a node.

        :param  node: The node to attach the volume to
        :type   node: :class:`Node`

        :param  volume: The volume to attach.
        :type   volume: :class:`StorageVolume`

        :keyword  device: Not used in this cloud.
        :type     device: ``None``

        :return:  True if successful
        :rtype:   ``bool``
        """
        op = self.connection.request('hosting.vm.disk_attach',
                                     int(node.id), int(volume.id))
        if self._wait_operation(op.object['id']):
            return True
        return False

    def detach_volume(self, node, volume):
        """
        Detaches a volume from a node.

        :param      node: Node which should be used
        :type       node: :class:`Node`

        :param      volume: Volume to be detached
        :type       volume: :class:`StorageVolume`

        :rtype: ``bool``
        """
        op = self.connection.request('hosting.vm.disk_detach',
                                     int(node.id), int(volume.id))
        if self._wait_operation(op.object['id']):
            return True
        return False

    def destroy_volume(self, volume):
        """
        Destroy a volume.

        :param  volume: Volume object to destroy
        :type   volume: :class:`StorageVolume`

        :return:  True if successful
        :rtype:   ``bool``
        """
        op = self.connection.request('hosting.disk.delete', int(volume.id))
        if self._wait_operation(op.object['id']):
            return True
        return False

    def _to_iface(self, iface):
        ips = []
        for ip in iface.get('ips', []):
            new_ip = IPAddress(
                ip['id'],
                NODE_STATE_MAP.get(
                    ip['state'],
                    NodeState.UNKNOWN
                ),
                ip['ip'],
                self.connection.driver,
                version=ip.get('version'),
                extra={'reverse': ip['reverse']}
            )
            ips.append(new_ip)
        return NetworkInterface(
            iface['id'],
            NODE_STATE_MAP.get(
                iface['state'],
                NodeState.UNKNOWN
            ),
            mac_address=None,
            driver=self.connection.driver,
            ips=ips,
            node_id=iface.get('vm_id'),
            extra={'bandwidth': iface['bandwidth']},
        )

    def _to_ifaces(self, ifaces):
        return [self._to_iface(i) for i in ifaces]

    def ex_list_interfaces(self):
        """
        Specific method to list network interfaces

        :rtype: ``list`` of :class:`GandiNetworkInterface`
        """
        ifaces = self.connection.request('hosting.iface.list').object
        ips = self.connection.request('hosting.ip.list').object
        for iface in ifaces:
            iface['ips'] = list(
                filter(lambda i: i['iface_id'] == iface['id'], ips))
        return self._to_ifaces(ifaces)

    def _to_disk(self, element):
        disk = Disk(
            id=element['id'],
            state=NODE_STATE_MAP.get(
                element['state'],
                NodeState.UNKNOWN
            ),
            name=element['name'],
            driver=self.connection.driver,
            size=element['size'],
            extra={'can_snapshot': element['can_snapshot']}
        )
        return disk

    def _to_disks(self, elements):
        return [self._to_disk(el) for el in elements]

    def ex_list_disks(self):
        """
        Specific method to list all disk

        :rtype: ``list`` of :class:`GandiDisk`
        """
        res = self.connection.request('hosting.disk.list', {})
        return self._to_disks(res.object)

    def ex_node_attach_disk(self, node, disk):
        """
        Specific method to attach a disk to a node

        :param      node: Node which should be used
        :type       node: :class:`Node`

        :param      disk: Disk which should be used
        :type       disk: :class:`GandiDisk`

        :rtype: ``bool``
        """
        op = self.connection.request('hosting.vm.disk_attach',
                                     int(node.id), int(disk.id))
        if self._wait_operation(op.object['id']):
            return True
        return False

    def ex_node_detach_disk(self, node, disk):
        """
        Specific method to detach a disk from a node

        :param      node: Node which should be used
        :type       node: :class:`Node`

        :param      disk: Disk which should be used
        :type       disk: :class:`GandiDisk`

        :rtype: ``bool``
        """
        op = self.connection.request('hosting.vm.disk_detach',
                                     int(node.id), int(disk.id))
        if self._wait_operation(op.object['id']):
            return True
        return False

    def ex_node_attach_interface(self, node, iface):
        """
        Specific method to attach an interface to a node

        :param      node: Node which should be used
        :type       node: :class:`Node`

        :param      iface: Network interface which should be used
        :type       iface: :class:`GandiNetworkInterface`

        :rtype: ``bool``
        """
        op = self.connection.request('hosting.vm.iface_attach',
                                     int(node.id), int(iface.id))
        if self._wait_operation(op.object['id']):
            return True
        return False

    def ex_node_detach_interface(self, node, iface):
        """
        Specific method to detach an interface from a node

        :param      node: Node which should be used
        :type       node: :class:`Node`

        :param      iface: Network interface which should be used
        :type       iface: :class:`GandiNetworkInterface`

        :rtype: ``bool``
        """
        op = self.connection.request('hosting.vm.iface_detach',
                                     int(node.id), int(iface.id))
        if self._wait_operation(op.object['id']):
            return True
        return False

    def ex_snapshot_disk(self, disk, name=None):
        """
        Specific method to make a snapshot of a disk

        :param      disk: Disk which should be used
        :type       disk: :class:`GandiDisk`

        :param      name: Name which should be used
        :type       name: ``str``

        :rtype: ``bool``
        """
        if not disk.extra.get('can_snapshot'):
            raise GandiException(1021, 'Disk %s can\'t snapshot' % disk.id)
        if not name:
            suffix = datetime.today().strftime('%Y%m%d')
            name = 'snap_%s' % (suffix)
        op = self.connection.request(
            'hosting.disk.create_from',
            {'name': name, 'type': 'snapshot', },
            int(disk.id),
        )
        if self._wait_operation(op.object['id']):
            return True
        return False

    def ex_update_disk(self, disk, new_size=None, new_name=None):
        """Specific method to update size or name of a disk
        WARNING: if a server is attached it'll be rebooted

        :param      disk: Disk which should be used
        :type       disk: :class:`GandiDisk`

        :param      new_size: New size
        :type       new_size: ``int``

        :param      new_name: New name
        :type       new_name: ``str``

        :rtype: ``bool``
        """
        params = {}
        if new_size:
            params.update({'size': new_size})
        if new_name:
            params.update({'name': new_name})
        op = self.connection.request('hosting.disk.update',
                                     int(disk.id),
                                     params)
        if self._wait_operation(op.object['id']):
            return True
        return False

    def _to_key_pair(self, data):
        key_pair = KeyPair(name=data['name'],
                           fingerprint=data['fingerprint'],
                           public_key=data.get('value', None),
                           private_key=data.get('privatekey', None),
                           driver=self, extra={'id': data['id']})
        return key_pair

    def _to_key_pairs(self, data):
        return [self._to_key_pair(k) for k in data]

    def list_key_pairs(self):
        """
        List registered key pairs.

        :return:   A list of key par objects.
        :rtype:   ``list`` of :class:`libcloud.compute.base.KeyPair`
        """
        kps = self.connection.request('hosting.ssh.list').object
        return self._to_key_pairs(kps)

    def get_key_pair(self, name):
        """
        Retrieve a single key pair.

        :param name: Name of the key pair to retrieve.
        :type name: ``str``

        :rtype: :class:`.KeyPair`
        """
        filter_params = {'name': name}
        kps = self.connection.request('hosting.ssh.list', filter_params).object
        return self._to_key_pair(kps[0])

    def import_key_pair_from_string(self, name, key_material):
        """
        Create a new key pair object.

        :param name: Key pair name.
        :type name: ``str``

        :param key_material: Public key material.
        :type key_material: ``str``

        :return: Imported key pair object.
        :rtype: :class:`.KeyPair`
        """
        params = {'name': name, 'value': key_material}
        kp = self.connection.request('hosting.ssh.create', params).object
        return self._to_key_pair(kp)

    def delete_key_pair(self, key_pair):
        """
        Delete an existing key pair.

        :param key_pair: Key pair object or ID.
        :type key_pair: :class.KeyPair` or ``int``

        :return:   True of False based on success of Keypair deletion
        :rtype:    ``bool``
        """
        key_id = key_pair if isinstance(key_pair, int) \
            else key_pair.extra['id']
        success = self.connection.request('hosting.ssh.delete', key_id).object
        return success

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AnonSec Team