# -*- coding: utf-8 -*-

import logging
import time
from functools import wraps
from salt.exceptions import CommandExecutionError
LOG = logging.getLogger(__name__)

# Import third party libs
HAS_NEUTRON = False
try:
    from neutronclient.v2_0 import client
    HAS_NEUTRON = True
except ImportError:
    pass

__opts__ = {}


def __virtual__():
    '''
    Only load this module if neutron
    is installed on this minion.
    '''
    if HAS_NEUTRON:
        return 'neutronng'
    return False


def _autheticate(func_name):
    '''
    Authenticate requests with the salt keystone module and format return data
    '''
    @wraps(func_name)
    def decorator_method(*args, **kwargs):
        '''
        Authenticate request and format return data
        '''
        connection_args = {'profile': kwargs.pop('profile', None)}
        nkwargs = {}
        for kwarg in kwargs:
            if 'connection_' in kwarg:
                connection_args.update({kwarg: kwargs[kwarg]})
            elif '__' not in kwarg:
                nkwargs.update({kwarg: kwargs[kwarg]})
        kstone = __salt__['keystoneng.auth'](**connection_args)
        endpoint_type = kwargs.get('connection_endpoint_type', 'internal')
        neutron_interface = client.Client(session=kstone.session, endpoint_type=endpoint_type)
        return_data = func_name(neutron_interface, *args, **nkwargs)
        # TODO(vsaienko) drop this formatting when all commands are updated
        # to return dictionary
        if isinstance(return_data, list):
            # format list as a dict for rendering
            return {data.get('name', None) or data['id']: data
                    for data in return_data}
        return return_data
    return decorator_method


@_autheticate
def list_floatingips(neutron_interface, **kwargs):
    '''
    list all floatingips
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.list_floatingips
    '''
    return neutron_interface.list_floatingips(**kwargs)['floatingips']


@_autheticate
def list_security_groups(neutron_interface, **kwargs):
    '''
    list all security_groups
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.list_security_groups
    '''
    return neutron_interface.list_security_groups(**kwargs)['security_groups']


@_autheticate
def list_subnets(neutron_interface, **kwargs):
    '''
    list all subnets
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.list_subnets
    '''
    return neutron_interface.list_subnets(**kwargs)


@_autheticate
def list_networks(neutron_interface, **kwargs):
    '''
    list all networks
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.list_networks
    '''
    return neutron_interface.list_networks(**kwargs)


@_autheticate
def list_ports(neutron_interface, **kwargs):
    '''
    list all ports
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.list_ports
    '''
    return neutron_interface.list_ports(**kwargs)['ports']


@_autheticate
def list_routers(neutron_interface, **kwargs):
    '''
    list all routers
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.list_routers
    '''
    return neutron_interface.list_routers(**kwargs)['routers']

@_autheticate
def update_floatingip(neutron_interface, fip, port_id=None):
    '''
    update floating IP. Should be used to associate and disassociate
    floating IP with instance
    CLI Example:
    .. code-block:: bash
        to associate with an instance's port
        salt '*' neutronng.update_floatingip openstack-floatingip-id port-id
        to disassociate from an instance's port
        salt '*' neutronng.update_floatingip openstack-floatingip-id
    '''
    neutron_interface.update_floatingip(fip, {"floatingip":
                                              {"port_id": port_id}})


@_autheticate
def update_subnet(neutron_interface, subnet_id, **subnet_params):
    '''
    update given subnet
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.update_subnet openstack-subnet-id name='new_name'
    '''
    return neutron_interface.update_subnet(subnet_id, {'subnet': subnet_params})


@_autheticate
def update_network(neutron_interface, network_id, **net_params):
    '''
    Update give network
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.update_network openstack-net-id admin_state_up=false
    '''
    network_params = {}
    for param in net_params:
        if 'provider_' in param or 'router_' in param:
            network_params[param.replace('_', ':', 1)] = net_params[param]
        else:
            network_params[param] = net_params[param]
    LOG.info('ATTRIBUTES ' + str(network_params))
    return neutron_interface.update_network(network_id, {'network': network_params})


@_autheticate
def update_router(neutron_interface, router_id, **router_params):
    '''
    update given router
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.update_router openstack-router-id name='new_name'
            external_gateway='openstack-network-id' administrative_state=true
    '''
    neutron_interface.update_router(router_id, {'router': router_params})


@_autheticate
def router_gateway_set(neutron_interface, router_id, external_gateway):
    '''
    Set external gateway for a router
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.update_router openstack-router-id openstack-network-id
    '''
    neutron_interface.update_router(
        router_id, {'router': {'external_gateway_info':
                               {'network_id': external_gateway}}})


@_autheticate
def router_gateway_clear(neutron_interface, router_id):
    '''
    Clear external gateway for a router
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.update_router openstack-router-id
    '''
    neutron_interface.update_router(
        router_id, {'router': {'external_gateway_info': None}})


@_autheticate
def create_router(neutron_interface, **router_params):
    '''
    Create OpenStack Neutron router
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.create_router name=R1
    '''
    response = neutron_interface.create_router({'router': router_params})
    if 'router' in response and 'id' in response['router']:
        return response['router']['id']


@_autheticate
def router_add_interface(neutron_interface, router_id, subnet_id):
    '''
    Attach router to a subnet
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.router_add_interface openstack-router-id subnet-id
    '''
    neutron_interface.add_interface_router(router_id, {'subnet_id': subnet_id})


@_autheticate
def router_rem_interface(neutron_interface, router_id, subnet_id):
    '''
    Dettach router from a subnet
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.router_rem_interface openstack-router-id subnet-id
    '''
    neutron_interface.remove_interface_router(
        router_id, {'subnet_id': subnet_id})


@_autheticate
def create_security_group(neutron_interface, **sg_params):
    '''
    Create a new security group
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.create_security_group name='new_rule'
            description='test rule'
    '''
    response = neutron_interface.create_security_group(
        {'security_group': sg_params})
    if 'security_group' in response and 'id' in response['security_group']:
        return response['security_group']['id']


@_autheticate
def create_security_group_rule(neutron_interface, **rule_params):
    '''
    Create a rule entry for a security group
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.create_security_group_rule
    '''
    neutron_interface.create_security_group_rule(
        {'security_group_rule': rule_params})


@_autheticate
def create_floatingip(neutron_interface, **floatingip_params):
    '''
    Create a new floating IP
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.create_floatingip floating_network_id=ext-net-id
    '''
    response = neutron_interface.create_floatingip(
        {'floatingip': floatingip_params})
    if 'floatingip' in response and 'id' in response['floatingip']:
        return response


@_autheticate
def create_subnet(neutron_interface, **subnet_params):
    '''
    Create a new subnet in OpenStack
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.create_subnet name='subnet name'
            network_id='openstack-network-id' cidr='192.168.10.0/24' \\
            gateway_ip='192.168.10.1' ip_version='4' enable_dhcp=false
    '''
    return neutron_interface.create_subnet({'subnet': subnet_params})


@_autheticate
def create_network(neutron_interface, **net_params):
    '''
    Create a new network segment in OpenStack
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.create_network name=External
            provider_network_type=flat provider_physical_network=ext
    '''
    network_params = {}
    for param in net_params:
        if 'provider_' in param or 'router_' in param:
            network_params[param.replace('_', ':', 1)] = net_params[param]
        else:
            network_params[param] = net_params[param]
    return neutron_interface.create_network({'network': network_params})


@_autheticate
def create_port(neutron_interface, **port_params):
    '''
    Create a new port in OpenStack
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.create_port network_id='openstack-network-id'
    '''
    return neutron_interface.create_port({'port': port_params})


@_autheticate
def update_port(neutron_interface, port_id, **port_params):
    '''
    Create a new port in OpenStack
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.update_port name='new_port_name'
    '''
    neutron_interface.update_port(port_id, {'port': port_params})


@_autheticate
def delete_floatingip(neutron_interface, floating_ip_id):
    '''
    delete a floating IP
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.delete_floatingip openstack-floating-ip-id
    '''
    neutron_interface.delete_floatingip(floating_ip_id)


@_autheticate
def delete_security_group(neutron_interface, sg_id):
    '''
    delete a security group
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.delete_security_group openstack-security-group-id
    '''
    neutron_interface.delete_security_group(sg_id)


@_autheticate
def delete_security_group_rule(neutron_interface, rule):
    '''
    delete a security group rule. pass all rule params that match the rule
    to be deleted
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.delete_security_group_rule direction='ingress'
            ethertype='ipv4' security_group_id='openstack-security-group-id'
            port_range_min=100 port_range_max=4096 protocol='tcp'
            remote_group_id='default'
    '''
    sg_rules = neutron_interface.list_security_group_rules(
        security_group_id=rule['security_group_id'])
    for sg_rule in sg_rules['security_group_rules']:
        sgr_id = sg_rule.pop('id')
        if sg_rule == rule:
            neutron_interface.delete_security_group_rule(sgr_id)


@_autheticate
def delete_subnet(neutron_interface, subnet_id):
    '''
    delete given subnet
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.delete_subnet openstack-subnet-id
    '''
    neutron_interface.delete_subnet(subnet_id)


@_autheticate
def delete_network(neutron_interface, network_id):
    '''
    delete given network
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.delete_network openstack-network-id
    '''
    neutron_interface.delete_network(network_id)


@_autheticate
def delete_router(neutron_interface, router_id):
    '''
    delete given router
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.delete_router openstack-router-id
    '''
    neutron_interface.delete_router(router_id)


@_autheticate
def list_extensions(neutron_interface, **kwargs):
    '''
    list all extensions
    CLI Example:
    .. code-block:: bash
        salt '*' neutronng.list_extensions
    '''
    return neutron_interface.list_extensions(**kwargs)


def wait_for_api_ready(profile, retries=1, retry_timeout=10):

    response = {'status': 'up'}
    for i in range(1, retries+1):
        try:
            list_routers(profile=profile)
        except Exception as e:
                msg = ("Error: %s "
                       "Sleeping for %ss. "
                       "Attempts %s of %s ")
                LOG.error(msg % (e, retry_timeout, i, retries))
                time.sleep(retry_timeout)
                if i == retries:
                  raise CommandExecutionError(e)
                continue
    return response