# Copyright (c) 2017 Cable Television Laboratories, Inc. ("CableLabs")
#                    and others.  All rights reserved.
#
# Licensed 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.


class Network:
    """
    SNAPS domain object for interface routers. Should contain attributes that
    are shared amongst cloud providers
    """
    def __init__(self, **kwargs):
        """
        Constructor
        :param name: the network's name
        :param id: the network's ID
        :param admin_state_up: T/F - network is up when True
        :param shared: T/F - network can be shared amongst other project's
        :param external: T/F - network is deemed to be external
        :param type: vlan, vxlan, flat, etc.
        :param subnets: list of Subnet objects
        """
        self.name = kwargs.get('name')
        self.id = kwargs.get('id')
        self.admin_state_up = kwargs.get('admin_state_up')
        self.shared = kwargs.get('shared')
        self.external = kwargs.get('router:external', kwargs.get('external'))
        self.type = kwargs.get('provider:network_type', kwargs.get('type'))
        self.subnets = kwargs.get('subnets', list())

    def __eq__(self, other):
        return (self.name == other.name and self.id == other.id and
                self.admin_state_up == other.admin_state_up and
                self.shared == other.shared and
                self.external == other.external and
                self.type == other.type and
                self.subnets == other.subnets)


class Subnet:
    """
    SNAPS domain object for interface routers. Should contain attributes that
    are shared amongst cloud providers
    """
    def __init__(self, **kwargs):
        """
        Constructor
        :param name: the network's name
        :param id: the subnet's ID
        :param network_id: the network's ID
        :param cidr: the CIDR
        :param ip_version: the IP version
        :param gateway_ip: the IP of the gateway
        :param enable_dhcp: T/F if DHCP is enabled
        :param dns_nameservers: list of DNS server IPs
        :param host_routes: routes as returned in a dict by Neutron
        :param ipv6_ra_mode: IPv6 RA Mode
        :param ipv6_address_mode: IPv6 Address Mode
        :param start: start IP address pool
        :param end: end IP address pool
        """
        self.name = kwargs.get('name')
        self.id = kwargs.get('id')
        self.network_id = kwargs.get('network_id')
        self.cidr = kwargs.get('cidr')
        self.ip_version = kwargs.get('ip_version')
        self.gateway_ip = kwargs.get('gateway_ip')
        self.enable_dhcp = kwargs.get('enable_dhcp')
        self.dns_nameservers = kwargs.get('dns_nameservers')
        self.host_routes = kwargs.get('host_routes')
        self.ipv6_ra_mode = kwargs.get('ipv6_ra_mode')
        self.ipv6_address_mode = kwargs.get('ipv6_address_mode')

        self.start = None
        self.end = None
        if ('allocation_pools' in kwargs and
                len(kwargs['allocation_pools']) > 0):
            # Will need to ultimately support a list of pools
            pools = kwargs['allocation_pools'][0]
            if 'start' in pools:
                self.start = pools['start']
            if 'end' in pools:
                self.end = pools['end']

    def __eq__(self, other):
        return (self.name == other.name and
                self.id == other.id and
                self.network_id == other.network_id and
                self.cidr == other.cidr and
                self.ip_version == other.ip_version and
                self.gateway_ip == other.gateway_ip and
                self.enable_dhcp == other.enable_dhcp and
                self.dns_nameservers == other.dns_nameservers and
                self.host_routes == other.host_routes and
                self.ipv6_ra_mode == other.ipv6_ra_mode and
                self.ipv6_address_mode == other.ipv6_address_mode and
                self.start == other.start and self.end == other.end)


class Port:
    """
    SNAPS domain object for ports. Should contain attributes that
    are shared amongst cloud providers
    """
    def __init__(self, **kwargs):
        """
        Constructor
        :param name: the security group's name
        :param id: the security group's id
        :param description: description
        :param ips|fixed_ips: a list of IP addresses
        :param mac_address: the port's MAC addresses
        :param allowed_address_pairs: the port's allowed_address_pairs value
        :param admin_state_up: T|F whether or not the port is up
        :param device_id: device's ID
        :param device_owner: device's owner
        :param network_id: associated network ID
        :param port_security_enabled: T|F whether or not the port security is
                                      enabled
        :param security_groups: the security group IDs associated with port
        :param project_id: the associated project/tenant ID
        """
        self.name = kwargs.get('name')
        self.id = kwargs.get('id')
        self.description = kwargs.get('description')
        self.ips = kwargs.get('ips', kwargs.get('fixed_ips'))
        self.mac_address = kwargs.get('mac_address')
        self.allowed_address_pairs = kwargs.get('allowed_address_pairs')
        self.admin_state_up = kwargs.get('admin_state_up')
        self.device_id = kwargs.get('device_id')
        self.device_owner = kwargs.get('device_owner')
        self.network_id = kwargs.get('network_id')
        self.port_security_enabled = kwargs.get('port_security_enabled')
        self.security_groups = kwargs.get('security_groups')
        self.project_id = kwargs.get('tenant_id', kwargs.get('project_id'))

    def __eq__(self, other):
        return (self.name == other.name and self.id == other.id and
                self.ips == other.ips, self.mac_address == other.mac_address)


class Router:
    """
    SNAPS domain object for routers. Should contain attributes that are shared
    amongst cloud providers
    """
    def __init__(self, **kwargs):
        """
        Constructor
        :param name: the router's name
        :param id: the router's id
        :param status: the router's status
        :param tenant_id: the router's project/tenant ID
        :param admin_state_up: Router is up when True
        :param external_gateway_info: dict() for populating external_network_id
                                      and external_fixed_ips
                   external_network_id: ID of the external network to route
                                        in dict under key 'external_fixed_ips'
                   external_fixed_ips: List IP addresses associated with the
                                       external_network_id found in dict under
                                       key 'network_id'
        :param port_subnets: list of tuples where #1 is the Port domain object
                             and #2 is a list of associated Subnet domain
                             objects
        """
        self.name = kwargs.get('name')
        self.id = kwargs.get('id')
        self.status = kwargs.get('status')
        self.tenant_id = kwargs.get('tenant_id')
        self.admin_state_up = kwargs.get('admin_state_up')
        self.port_subnets = kwargs.get('port_subnets')

        if (kwargs.get('external_gateway_info') and
                isinstance(kwargs.get('external_gateway_info'), dict) and
                kwargs.get('external_gateway_info').get('external_fixed_ips')):
            gateway_info = kwargs.get('external_gateway_info')

            self.external_network_id = gateway_info.get('network_id')
            self.external_fixed_ips = gateway_info.get('external_fixed_ips')
        else:
            self.external_fixed_ips = kwargs.get('external_fixed_ips', None)
            self.external_network_id = kwargs.get('external_network_id', None)

    def __eq__(self, other):
        return (self.name == other.name and self.id == other.id and
                self.status == other.status and
                self.tenant_id == other.tenant_id and
                self.admin_state_up == other.admin_state_up and
                self.external_network_id == other.external_network_id and
                self.external_fixed_ips == other.external_fixed_ips and
                self.port_subnets == other.port_subnets)


class InterfaceRouter:
    """
    SNAPS domain object for interface routers. Should contain attributes that
    are shared amongst cloud providers
    """
    def __init__(self, **kwargs):
        """
        Constructor
        """
        self.id = kwargs.get('id')
        self.subnet_id = kwargs.get('subnet_id')
        self.port_id = kwargs.get('port_id')

    def __eq__(self, other):
        return (self.id == other.id and self.subnet_id == other.subnet_id and
                self.port_id == other.port_id)


class SecurityGroup:
    """
    SNAPS domain object for SecurityGroups. Should contain attributes that
    are shared amongst cloud providers
    """
    def __init__(self, **kwargs):
        """
        Constructor
        :param name: the security group's name
        :param id: the security group's id
        :param description: the security group's description
        :param project_id: the security group's project_id
        :param rules: list of SecurityGroupRule objects associated to this
        """
        self.name = kwargs.get('name')
        self.id = kwargs.get('id')
        self.description = kwargs.get('description')
        self.project_id = kwargs.get('project_id', kwargs.get('tenant_id'))

        self.rules = list()
        if kwargs.get('rules') and isinstance(kwargs.get('rules'), list):
            for rule in kwargs.get('rules'):
                if isinstance(rule, SecurityGroupRule):
                    self.rules.append(rule)
                else:
                    self.rules.append(SecurityGroupRule(**rule))

    def __eq__(self, other):
        return (self.name == other.name and
                self.id == other.id and
                self.description == other.description and
                self.project_id == other.project_id and
                self.rules == other.rules)


class SecurityGroupRule:
    """
    SNAPS domain object for Security Group Rules. Should contain attributes
    that are shared amongst cloud providers
    """
    def __init__(self, **kwargs):
        """
        Constructor
        :param id: the security group rule's id
        :param security_group_id: the ID of the associated security group
        :param description: the security group rule's description
        :param direction: the security group rule's direction
        :param ethertype: the security group rule's ethertype
        :param port_range_min: the security group rule's port_range_min
        :param port_range_max: the security group rule's port_range_max
        :param protocol: the security group rule's protocol
        :param remote_group_id: the security group rule's remote_group_id
        :param remote_ip_prefix: the security group rule's remote_ip_prefix
        """
        self.id = kwargs.get('id')
        self.security_group_id = kwargs.get('security_group_id')
        self.description = kwargs.get('description')
        self.direction = kwargs.get('direction')
        self.ethertype = kwargs.get('ethertype')
        self.port_range_min = kwargs.get('port_range_min')
        self.port_range_max = kwargs.get('port_range_max')
        self.protocol = kwargs.get('protocol')
        self.remote_group_id = kwargs.get('remote_group_id')
        self.remote_ip_prefix = kwargs.get('remote_ip_prefix')

    def __eq__(self, other):
        return (self.id == other.id and
                self.security_group_id == other.security_group_id and
                self.description == other.description and
                self.direction == other.direction and
                self.ethertype == other.ethertype and
                self.port_range_min == other.port_range_min and
                self.port_range_max == other.port_range_max and
                self.protocol == other.protocol and
                self.remote_group_id == other.remote_group_id and
                self.remote_ip_prefix == other.remote_ip_prefix)