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from time import sleep

from kamaki.clients.cyclades.rest_api import CycladesRestClient

from kamaki.clients.network import NetworkClient

from kamaki.clients.utils import path4url

from kamaki.clients import ClientError

class CycladesClient(CycladesRestClient):

    """Synnefo Cyclades Compute API client"""

    def create_server(

            self, name, flavor_id, image_id,

            metadata=None, personality=None):

        """Submit request to create a new server

        :param name: (str)

        :param flavor_id: integer id denoting a preset hardware configuration

        :param image_id: (str) id denoting the OS image to run on virt. server

        :param metadata: (dict) vm metadata updated by os/users image metadata

        :param personality: a list of (file path, file contents) tuples,

            describing files to be injected into virtual server upon creation

        :returns: a dict with the new virtual server details

        :raises ClientError: wraps request errors

        """

        image = self.get_image_details(image_id)

        metadata = metadata or dict()

        for key in ('os', 'users'):

            try:

                metadata[key] = image['metadata'][key]

            except KeyError:

                pass

        return super(CycladesClient, self).create_server(

            name, flavor_id, image_id,

            metadata=metadata, personality=personality)

    def start_server(self, server_id):

        """Submit a startup request

        :param server_id: integer (str or int)

        :returns: (dict) response headers

        """

        req = {'start': {}}

        r = self.servers_action_post(server_id, json_data=req, success=202)

        return r.headers

    def shutdown_server(self, server_id):

        """Submit a shutdown request

        :param server_id: integer (str or int)

        :returns: (dict) response headers

        """

        req = {'shutdown': {}}

        r = self.servers_action_post(server_id, json_data=req, success=202)

        return r.headers

    def get_server_console(self, server_id):

        """

        :param server_id: integer (str or int)

        :returns: (dict) info to set a VNC connection to virtual server

        """

        req = {'console': {'type': 'vnc'}}

        r = self.servers_action_post(server_id, json_data=req, success=200)

        return r.json['console']

    def get_firewall_profile(self, server_id):

        """

        :param server_id: integer (str or int)

        :returns: (str) ENABLED | DISABLED | PROTECTED

        :raises ClientError: 520 No Firewall Profile

        """

        r = self.get_server_details(server_id)

        try:

            return r['attachments'][0]['firewallProfile']

        except KeyError:

            raise ClientError(

                'No Firewall Profile',

                details='Server %s is missing a firewall profile' % server_id)

    def set_firewall_profile(self, server_id, profile):

        """Set the firewall profile for the public interface of a server

        :param server_id: integer (str or int)

        :param profile: (str) ENABLED | DISABLED | PROTECTED

        :returns: (dict) response headers

        """

        req = {'firewallProfile': {'profile': profile}}

        r = self.servers_action_post(server_id, json_data=req, success=202)

        return r.headers

    def list_server_nics(self, server_id):

        """

        :param server_id: integer (str or int)

        :returns: (dict) network interface connections

        """

        r = self.servers_ips_get(server_id)

        return r.json['attachments']

    def get_server_stats(self, server_id):

        """

        :param server_id: integer (str or int)

        :returns: (dict) auto-generated graphs of statistics (urls)

        """

        r = self.servers_stats_get(server_id)

        return r.json['stats']

    def list_networks(self, detail=False):

        """

        :param detail: (bool)

        :returns: (list) id,name if not detail else full info per network

        """

        detail = 'detail' if detail else ''

        r = self.networks_get(command=detail)

        return r.json['networks']

    def list_network_nics(self, network_id):

        """

        :param network_id: integer (str or int)

        :returns: (list)

        """

        r = self.networks_get(network_id=network_id)

        return r.json['network']['attachments']

    def create_network(

            self, name,

            cidr=None, gateway=None, type=None, dhcp=False):

        """

        :param name: (str)

        :param cidr: (str)

        :param geteway: (str)

        :param type: (str) if None, will use MAC_FILTERED as default

            Valid values: CUSTOM, IP_LESS_ROUTED, MAC_FILTERED, PHYSICAL_VLAN

        :param dhcp: (bool)

        :returns: (dict) network detailed info

        """

        net = dict(name=name)

        if cidr:

            net['cidr'] = cidr

        if gateway:

            net['gateway'] = gateway

        net['type'] = type or 'MAC_FILTERED'

        net['dhcp'] = True if dhcp else False

        req = dict(network=net)

        r = self.networks_post(json_data=req, success=202)

        return r.json['network']

    def get_network_details(self, network_id):

        """

        :param network_id: integer (str or int)

        :returns: (dict)

        """

        r = self.networks_get(network_id=network_id)

        return r.json['network']

    def update_network_name(self, network_id, new_name):

        """

        :param network_id: integer (str or int)

        :param new_name: (str)

        :returns: (dict) response headers

        """

        req = {'network': {'name': new_name}}

        r = self.networks_put(network_id=network_id, json_data=req)

        return r.headers

    def delete_network(self, network_id):

        """

        :param network_id: integer (str or int)

        :returns: (dict) response headers

        :raises ClientError: 421 Network in use

        """

        try:

            r = self.networks_delete(network_id)

            return r.headers

        except ClientError as err:

            if err.status == 421:

                err.details = [

                    'Network may be still connected to at least one server']

            raise

    def connect_server(self, server_id, network_id):

        """ Connect a server to a network

        :param server_id: integer (str or int)

        :param network_id: integer (str or int)

        :returns: (dict) response headers

        """

        req = {'add': {'serverRef': server_id}}

        r = self.networks_post(network_id, 'action', json_data=req)

        return r.headers

    def disconnect_server(self, server_id, nic_id):

        """

        :param server_id: integer (str or int)

        :param nic_id: (str)

        :returns: (int) the number of nics disconnected

        """

        vm_nets = self.list_server_nics(server_id)

        num_of_disconnections = 0

        for (nic_id, network_id) in [(

                net['id'],

                net['network_id']) for net in vm_nets if nic_id == net['id']]:

            req = {'remove': {'attachment': '%s' % nic_id}}

            self.networks_post(network_id, 'action', json_data=req)

            num_of_disconnections += 1

        return num_of_disconnections

    def disconnect_network_nics(self, netid):

        """

        :param netid: integer (str or int)

        """

        for nic in self.list_network_nics(netid):

            req = dict(remove=dict(attachment=nic))

            self.networks_post(netid, 'action', json_data=req)

    def _wait(

            self, item_id, current_status, get_status,

            delay=1, max_wait=100, wait_cb=None):

        """Wait for item while its status is current_status

        :param server_id: integer (str or int)

        :param current_status: (str)

        :param get_status: (method(self, item_id)) if called, returns

            (status, progress %) If no way to tell progress, return None

        :param delay: time interval between retries

        :param wait_cb: if set a progress bar is used to show progress

        :returns: (str) the new mode if successful, (bool) False if timed out

        """

        status, progress = get_status(self, item_id)

        if wait_cb:

            wait_gen = wait_cb(max_wait // delay)

            wait_gen.next()

        if status != current_status:

            if wait_cb:

                try:

                    wait_gen.next()

                except Exception:

                    pass

            return status

        old_wait = total_wait = 0

        while status == current_status and total_wait <= max_wait:

            if wait_cb:

                try:

                    for i in range(total_wait - old_wait):

                        wait_gen.next()

                except Exception:

                    break

            old_wait = total_wait

            total_wait = progress or total_wait + 1

            sleep(delay)

            status, progress = get_status(self, item_id)

        if total_wait < max_wait:

            if wait_cb:

                try:

                    for i in range(max_wait):

                        wait_gen.next()

                except:

                    pass

        return status if status != current_status else False

    def wait_server(

            self, server_id,

            current_status='BUILD',

            delay=1, max_wait=100, wait_cb=None):

        """Wait for server while its status is current_status

        :param server_id: integer (str or int)

        :param current_status: (str) BUILD|ACTIVE|STOPPED|DELETED|REBOOT

        :param delay: time interval between retries

        :max_wait: (int) timeout in secconds

        :param wait_cb: if set a progressbar is used to show progress

        :returns: (str) the new mode if succesfull, (bool) False if timed out

        """

        def get_status(self, server_id):

            r = self.get_server_details(server_id)

            return r['status'], (r.get('progress', None) if (

                            current_status in ('BUILD', )) else None)

        return self._wait(

            server_id, current_status, get_status, delay, max_wait, wait_cb)

    def wait_network(

            self, net_id,

            current_status='PENDING', delay=1, max_wait=100, wait_cb=None):

        """Wait for network while its status is current_status

        :param net_id: integer (str or int)

        :param current_status: (str) PENDING | ACTIVE | DELETED

        :param delay: time interval between retries

        :max_wait: (int) timeout in secconds

        :param wait_cb: if set a progressbar is used to show progress

        :returns: (str) the new mode if succesfull, (bool) False if timed out

        """

        def get_status(self, net_id):

            r = self.get_network_details(net_id)

            return r['status'], None

        return self._wait(

            net_id, current_status, get_status, delay, max_wait, wait_cb)

    def wait_firewall(

            self, server_id,

            current_status='DISABLED', delay=1, max_wait=100, wait_cb=None):

        """Wait while the public network firewall status is current_status

        :param server_id: integer (str or int)

        :param current_status: (str) DISABLED | ENABLED | PROTECTED

        :param delay: time interval between retries

        :max_wait: (int) timeout in secconds

        :param wait_cb: if set a progressbar is used to show progress

        :returns: (str) the new mode if succesfull, (bool) False if timed out

        """

        def get_status(self, server_id):

            return self.get_firewall_profile(server_id), None

        return self._wait(

            server_id, current_status, get_status, delay, max_wait, wait_cb)

    def get_floating_ip_pools(self):

        """

        :returns: (dict) {floating_ip_pools:[{name: ...}, ...]}

        """

        r = self.floating_ip_pools_get()

        return r.json

    def get_floating_ips(self):

        """

        :returns: (dict) {floating_ips: [fixed_ip: , id: , ip: , pool: ]}

        """

        r = self.floating_ips_get()

        return r.json

    def alloc_floating_ip(self, pool=None, address=None):

        """

        :param pool: (str) pool of ips to allocate from

        :param address: (str) ip address to request

        :returns: (dict) {

            fixed_ip: ..., id: ..., instance_id: ..., ip: ..., pool: ...}

        """

        json_data = dict()

        if pool:

            json_data['pool'] = pool

        if address:

            json_data['address'] = address

        r = self.floating_ips_post(json_data)

        return r.json['floating_ip']

    def get_floating_ip(self, fip_id):

        """

        :param fip_id: (str) floating ip id

        :returns: (dict)

            {fixed_ip: ..., id: ..., instance_id: ..., ip: ..., pool: ...},

        :raises AssertionError: if fip_id is emtpy

        """

        assert fip_id, 'floating ip id is needed for get_floating_ip'

        r = self.floating_ips_get(fip_id)

        return r.json['floating_ip']

    def delete_floating_ip(self, fip_id=None):

        """

        :param fip_id: (str) floating ip id (if None, all ips are deleted)

        :returns: (dict) request headers

        :raises AssertionError: if fip_id is emtpy

        """

        assert fip_id, 'floating ip id is needed for delete_floating_ip'

        r = self.floating_ips_delete(fip_id)

        return r.headers

    def attach_floating_ip(self, server_id, address):

        """Associate the address ip to server with server_id

        :param server_id: (int)

        :param address: (str) the ip address to assign to server (vm)

        :returns: (dict) request headers

        :raises ValueError: if server_id cannot be converted to int

        :raises ValueError: if server_id is not of a int-convertable type

        :raises AssertionError: if address is emtpy

        """

        server_id = int(server_id)

        assert address, 'address is needed for attach_floating_ip'

        req = dict(addFloatingIp=dict(address=address))

        r = self.servers_action_post(server_id, json_data=req)

        return r.headers

    def detach_floating_ip(self, server_id, address):

        """Disassociate an address ip from the server with server_id

        :param server_id: (int)

        :param address: (str) the ip address to assign to server (vm)

        :returns: (dict) request headers

        :raises ValueError: if server_id cannot be converted to int

        :raises ValueError: if server_id is not of a int-convertable type

        :raises AssertionError: if address is emtpy

        """

        server_id = int(server_id)

        assert address, 'address is needed for detach_floating_ip'

        req = dict(removeFloatingIp=dict(address=address))

        r = self.servers_action_post(server_id, json_data=req)

        return r.headers

class CycladesNetworkClient(NetworkClient):

    """Cyclades Network API extentions"""

    network_types = (

        'CUSTOM', 'MAC_FILTERED', 'IP_LESS_ROUTED', 'PHYSICAL_VLAN')

    def list_networks(self, detail=None):

        path = path4url('networks', 'detail' if detail else '')

        r = self.get(path, success=200)

        return r.json['networks']

    def create_network(self, type, name=None, shared=None):

        req = dict(network=dict(type=type, admin_state_up=True))

        if name:

            req['network']['name'] = name

        if shared not in (None, ):

            req['network']['shared'] = bool(shared)

        r = self.networks_post(json_data=req, success=201)

        return r.json['network']