# -*- coding: utf-8 -*-
'''
The networking module for RHEL/Fedora based distros
'''
from __future__ import absolute_import, unicode_literals, print_function

# Import python libs
import logging
import os.path
import os

# Import third party libs
import jinja2
import jinja2.exceptions

# Import salt libs
import salt.utils.files
import salt.utils.stringutils
import salt.utils.templates
import salt.utils.validate.net
from salt.exceptions import CommandExecutionError
from salt.ext import six

# Set up logging
log = logging.getLogger(__name__)

# Set up template environment
JINJA = jinja2.Environment(
    loader=jinja2.FileSystemLoader(
        os.path.join(salt.utils.templates.TEMPLATE_DIRNAME, 'rh_ip')
    )
)

# Define the module's virtual name
__virtualname__ = 'ip'


def __virtual__():
    '''
    Confine this module to RHEL/Fedora based distros
    '''
    if __grains__['os_family'] == 'RedHat':
        return __virtualname__
    return (False, 'The rh_ip execution module cannot be loaded: this module is only available on RHEL/Fedora based distributions.')


# Setup networking attributes
_ETHTOOL_CONFIG_OPTS = [
    'autoneg', 'speed', 'duplex',
    'rx', 'tx', 'sg', 'tso', 'ufo',
    'gso', 'gro', 'lro', 'advertise'
]
_RH_CONFIG_OPTS = [
    'domain', 'peerdns', 'peerntp', 'defroute',
    'mtu', 'static-routes', 'gateway', 'zone'
]
_RH_CONFIG_BONDING_OPTS = [
    'mode', 'miimon', 'arp_interval',
    'arp_ip_target', 'downdelay', 'updelay',
    'use_carrier', 'lacp_rate', 'hashing-algorithm',
    'max_bonds', 'tx_queues', 'num_grat_arp',
    'num_unsol_na', 'primary', 'primary_reselect',
    'ad_select', 'xmit_hash_policy', 'arp_validate',
    'fail_over_mac', 'all_slaves_active', 'resend_igmp'
]
_RH_NETWORK_SCRIPT_DIR = '/etc/sysconfig/network-scripts'
_RH_NETWORK_FILE = '/etc/sysconfig/network'
_RH_NETWORK_CONF_FILES = '/etc/modprobe.d'
_CONFIG_TRUE = ['yes', 'on', 'true', '1', True]
_CONFIG_FALSE = ['no', 'off', 'false', '0', False]
_IFACE_TYPES = [
    'eth', 'bond', 'alias', 'clone',
    'ipsec', 'dialup', 'bridge', 'slave', 'vlan',
    'ipip', 'ib',
]


def _error_msg_iface(iface, option, expected):
    '''
    Build an appropriate error message from a given option and
    a list of expected values.
    '''
    msg = 'Invalid option -- Interface: {0}, Option: {1}, Expected: [{2}]'
    return msg.format(iface, option, '|'.join(str(e) for e in expected))


def _error_msg_routes(iface, option, expected):
    '''
    Build an appropriate error message from a given option and
    a list of expected values.
    '''
    msg = 'Invalid option -- Route interface: {0}, Option: {1}, Expected: [{2}]'
    return msg.format(iface, option, expected)


def _log_default_iface(iface, opt, value):
    log.info('Using default option -- Interface: %s Option: %s Value: %s',
             iface, opt, value)


def _error_msg_network(option, expected):
    '''
    Build an appropriate error message from a given option and
    a list of expected values.
    '''
    msg = 'Invalid network setting -- Setting: {0}, Expected: [{1}]'
    return msg.format(option, '|'.join(str(e) for e in expected))


def _log_default_network(opt, value):
    log.info('Using existing setting -- Setting: %s Value: %s',
             opt, value)


def _parse_rh_config(path):
    rh_config = _read_file(path)
    cv_rh_config = {}
    if rh_config:
        for line in rh_config:
            line = line.strip()
            if len(line) == 0 or line.startswith('!') or line.startswith('#'):
                continue
            pair = [p.rstrip() for p in line.split('=', 1)]
            if len(pair) != 2:
                continue
            name, value = pair
            cv_rh_config[name.upper()] = value

    return cv_rh_config


def _parse_ethtool_opts(opts, iface):
    '''
    Filters given options and outputs valid settings for ETHTOOLS_OPTS
    If an option has a value that is not expected, this
    function will log what the Interface, Setting and what it was
    expecting.
    '''
    config = {}

    if 'autoneg' in opts:
        if opts['autoneg'] in _CONFIG_TRUE:
            config.update({'autoneg': 'on'})
        elif opts['autoneg'] in _CONFIG_FALSE:
            config.update({'autoneg': 'off'})
        else:
            _raise_error_iface(iface, 'autoneg', _CONFIG_TRUE + _CONFIG_FALSE)

    if 'duplex' in opts:
        valid = ['full', 'half']
        if opts['duplex'] in valid:
            config.update({'duplex': opts['duplex']})
        else:
            _raise_error_iface(iface, 'duplex', valid)

    if 'speed' in opts:
        valid = ['10', '100', '1000', '10000']
        if six.text_type(opts['speed']) in valid:
            config.update({'speed': opts['speed']})
        else:
            _raise_error_iface(iface, opts['speed'], valid)

    if 'advertise' in opts:
        valid = [
            '0x001', '0x002', '0x004', '0x008', '0x010', '0x020',
            '0x20000', '0x8000', '0x1000', '0x40000', '0x80000',
            '0x200000', '0x400000', '0x800000', '0x1000000',
            '0x2000000', '0x4000000'
        ]
        if six.text_type(opts['advertise']) in valid:
            config.update({'advertise': opts['advertise']})
        else:
            _raise_error_iface(iface, 'advertise', valid)

    valid = _CONFIG_TRUE + _CONFIG_FALSE
    for option in ('rx', 'tx', 'sg', 'tso', 'ufo', 'gso', 'gro', 'lro'):
        if option in opts:
            if opts[option] in _CONFIG_TRUE:
                config.update({option: 'on'})
            elif opts[option] in _CONFIG_FALSE:
                config.update({option: 'off'})
            else:
                _raise_error_iface(iface, option, valid)

    return config


def _parse_settings_bond(opts, iface):
    '''
    Filters given options and outputs valid settings for requested
    operation. If an option has a value that is not expected, this
    function will log what the Interface, Setting and what it was
    expecting.
    '''

    bond_def = {
        # 803.ad aggregation selection logic
        # 0 for stable (default)
        # 1 for bandwidth
        # 2 for count
        'ad_select': '0',
        # Max number of transmit queues (default = 16)
        'tx_queues': '16',
        # Link monitoring in milliseconds. Most NICs support this
        'miimon': '100',
        # ARP interval in milliseconds
        'arp_interval': '250',
        # Delay before considering link down in milliseconds (miimon * 2)
        'downdelay': '200',
        # lacp_rate 0: Slow - every 30 seconds
        # lacp_rate 1: Fast - every 1 second
        'lacp_rate': '0',
        # Max bonds for this driver
        'max_bonds': '1',
        # Specifies the time, in milliseconds, to wait before
        # enabling a slave after a link recovery has been
        # detected. Only used with miimon.
        'updelay': '0',
        # Used with miimon.
        # On: driver sends mii
        # Off: ethtool sends mii
        'use_carrier': '0',
        # Default. Don't change unless you know what you are doing.
        'xmit_hash_policy': 'layer2',
    }

    if opts['mode'] in ['balance-rr', '0']:
        log.info(
            'Device: %s Bonding Mode: load balancing (round-robin)',
            iface
        )
        return _parse_settings_bond_0(opts, iface, bond_def)
    elif opts['mode'] in ['active-backup', '1']:
        log.info(
            'Device: %s Bonding Mode: fault-tolerance (active-backup)',
            iface
        )
        return _parse_settings_bond_1(opts, iface, bond_def)
    elif opts['mode'] in ['balance-xor', '2']:
        log.info(
            'Device: %s Bonding Mode: load balancing (xor)',
            iface
        )
        return _parse_settings_bond_2(opts, iface, bond_def)
    elif opts['mode'] in ['broadcast', '3']:
        log.info(
            'Device: %s Bonding Mode: fault-tolerance (broadcast)',
            iface
        )
        return _parse_settings_bond_3(opts, iface, bond_def)
    elif opts['mode'] in ['802.3ad', '4']:
        log.info(
            'Device: %s Bonding Mode: IEEE 802.3ad Dynamic link '
            'aggregation', iface
        )
        return _parse_settings_bond_4(opts, iface, bond_def)
    elif opts['mode'] in ['balance-tlb', '5']:
        log.info(
            'Device: %s Bonding Mode: transmit load balancing', iface
        )
        return _parse_settings_bond_5(opts, iface, bond_def)
    elif opts['mode'] in ['balance-alb', '6']:
        log.info(
            'Device: %s Bonding Mode: adaptive load balancing', iface
        )
        return _parse_settings_bond_6(opts, iface, bond_def)
    else:
        valid = [
            '0', '1', '2', '3', '4', '5', '6',
            'balance-rr', 'active-backup', 'balance-xor',
            'broadcast', '802.3ad', 'balance-tlb', 'balance-alb'
        ]
        _raise_error_iface(iface, 'mode', valid)


def _parse_settings_bond_0(opts, iface, bond_def):
    '''
    Filters given options and outputs valid settings for bond0.
    If an option has a value that is not expected, this
    function will log what the Interface, Setting and what it was
    expecting.
    '''

    # balance-rr shares miimon settings with balance-xor
    bond = _parse_settings_bond_1(opts, iface, bond_def)

    bond.update({'mode': '0'})

    # ARP targets in n.n.n.n form
    valid = ['list of ips (up to 16)']
    if 'arp_ip_target' in opts:
        if isinstance(opts['arp_ip_target'], list):
            if 1 <= len(opts['arp_ip_target']) <= 16:
                bond.update({'arp_ip_target': ''})
                for ip in opts['arp_ip_target']:  # pylint: disable=C0103
                    if len(bond['arp_ip_target']) > 0:
                        bond['arp_ip_target'] = bond['arp_ip_target'] + ',' + ip
                    else:
                        bond['arp_ip_target'] = ip
            else:
                _raise_error_iface(iface, 'arp_ip_target', valid)
        else:
            _raise_error_iface(iface, 'arp_ip_target', valid)
    elif 'miimon' not in opts:
        _raise_error_iface(iface, 'arp_ip_target', valid)

    if 'arp_interval' in opts:
        try:
            int(opts['arp_interval'])
            bond.update({'arp_interval': opts['arp_interval']})
        except Exception:  # pylint: disable=broad-except
            _raise_error_iface(iface, 'arp_interval', ['integer'])
    else:
        _log_default_iface(iface, 'arp_interval', bond_def['arp_interval'])
        bond.update({'arp_interval': bond_def['arp_interval']})

    return bond


def _parse_settings_bond_1(opts, iface, bond_def):

    '''
    Filters given options and outputs valid settings for bond1.
    If an option has a value that is not expected, this
    function will log what the Interface, Setting and what it was
    expecting.
    '''
    bond = {'mode': '1'}

    for binding in ['miimon', 'downdelay', 'updelay']:
        if binding in opts:
            try:
                int(opts[binding])
                bond.update({binding: opts[binding]})
            except Exception:  # pylint: disable=broad-except
                _raise_error_iface(iface, binding, ['integer'])
        else:
            _log_default_iface(iface, binding, bond_def[binding])
            bond.update({binding: bond_def[binding]})

    if 'use_carrier' in opts:
        if opts['use_carrier'] in _CONFIG_TRUE:
            bond.update({'use_carrier': '1'})
        elif opts['use_carrier'] in _CONFIG_FALSE:
            bond.update({'use_carrier': '0'})
        else:
            valid = _CONFIG_TRUE + _CONFIG_FALSE
            _raise_error_iface(iface, 'use_carrier', valid)
    else:
        _log_default_iface(iface, 'use_carrier', bond_def['use_carrier'])
        bond.update({'use_carrier': bond_def['use_carrier']})

    if 'primary' in opts:
        bond.update({'primary': opts['primary']})

    return bond


def _parse_settings_bond_2(opts, iface, bond_def):
    '''
    Filters given options and outputs valid settings for bond2.
    If an option has a value that is not expected, this
    function will log what the Interface, Setting and what it was
    expecting.
    '''

    bond = {'mode': '2'}

    valid = ['list of ips (up to 16)']
    if 'arp_ip_target' in opts:
        if isinstance(opts['arp_ip_target'], list):
            if 1 <= len(opts['arp_ip_target']) <= 16:
                bond.update({'arp_ip_target': ''})
                for ip in opts['arp_ip_target']:  # pylint: disable=C0103
                    if len(bond['arp_ip_target']) > 0:
                        bond['arp_ip_target'] = bond['arp_ip_target'] + ',' + ip
                    else:
                        bond['arp_ip_target'] = ip
            else:
                _raise_error_iface(iface, 'arp_ip_target', valid)
        else:
            _raise_error_iface(iface, 'arp_ip_target', valid)
    else:
        _raise_error_iface(iface, 'arp_ip_target', valid)

    if 'arp_interval' in opts:
        try:
            int(opts['arp_interval'])
            bond.update({'arp_interval': opts['arp_interval']})
        except Exception:  # pylint: disable=broad-except
            _raise_error_iface(iface, 'arp_interval', ['integer'])
    else:
        _log_default_iface(iface, 'arp_interval', bond_def['arp_interval'])
        bond.update({'arp_interval': bond_def['arp_interval']})

    if 'hashing-algorithm' in opts:
        valid = ['layer2', 'layer2+3', 'layer3+4']
        if opts['hashing-algorithm'] in valid:
            bond.update({'xmit_hash_policy': opts['hashing-algorithm']})
        else:
            _raise_error_iface(iface, 'hashing-algorithm', valid)

    return bond


def _parse_settings_bond_3(opts, iface, bond_def):

    '''
    Filters given options and outputs valid settings for bond3.
    If an option has a value that is not expected, this
    function will log what the Interface, Setting and what it was
    expecting.
    '''
    bond = {'mode': '3'}

    for binding in ['miimon', 'downdelay', 'updelay']:
        if binding in opts:
            try:
                int(opts[binding])
                bond.update({binding: opts[binding]})
            except Exception:  # pylint: disable=broad-except
                _raise_error_iface(iface, binding, ['integer'])
        else:
            _log_default_iface(iface, binding, bond_def[binding])
            bond.update({binding: bond_def[binding]})

    if 'use_carrier' in opts:
        if opts['use_carrier'] in _CONFIG_TRUE:
            bond.update({'use_carrier': '1'})
        elif opts['use_carrier'] in _CONFIG_FALSE:
            bond.update({'use_carrier': '0'})
        else:
            valid = _CONFIG_TRUE + _CONFIG_FALSE
            _raise_error_iface(iface, 'use_carrier', valid)
    else:
        _log_default_iface(iface, 'use_carrier', bond_def['use_carrier'])
        bond.update({'use_carrier': bond_def['use_carrier']})

    return bond


def _parse_settings_bond_4(opts, iface, bond_def):
    '''
    Filters given options and outputs valid settings for bond4.
    If an option has a value that is not expected, this
    function will log what the Interface, Setting and what it was
    expecting.
    '''

    bond = {'mode': '4'}

    for binding in ['miimon', 'downdelay', 'updelay', 'lacp_rate', 'ad_select']:
        if binding in opts:
            if binding == 'lacp_rate':
                if opts[binding] == 'fast':
                    opts.update({binding: '1'})
                if opts[binding] == 'slow':
                    opts.update({binding: '0'})
                valid = ['fast', '1', 'slow', '0']
            else:
                valid = ['integer']
            try:
                int(opts[binding])
                bond.update({binding: opts[binding]})
            except Exception:  # pylint: disable=broad-except
                _raise_error_iface(iface, binding, valid)
        else:
            _log_default_iface(iface, binding, bond_def[binding])
            bond.update({binding: bond_def[binding]})

    if 'use_carrier' in opts:
        if opts['use_carrier'] in _CONFIG_TRUE:
            bond.update({'use_carrier': '1'})
        elif opts['use_carrier'] in _CONFIG_FALSE:
            bond.update({'use_carrier': '0'})
        else:
            valid = _CONFIG_TRUE + _CONFIG_FALSE
            _raise_error_iface(iface, 'use_carrier', valid)
    else:
        _log_default_iface(iface, 'use_carrier', bond_def['use_carrier'])
        bond.update({'use_carrier': bond_def['use_carrier']})

    if 'hashing-algorithm' in opts:
        valid = ['layer2', 'layer2+3', 'layer3+4']
        if opts['hashing-algorithm'] in valid:
            bond.update({'xmit_hash_policy': opts['hashing-algorithm']})
        else:
            _raise_error_iface(iface, 'hashing-algorithm', valid)

    return bond


def _parse_settings_bond_5(opts, iface, bond_def):

    '''
    Filters given options and outputs valid settings for bond5.
    If an option has a value that is not expected, this
    function will log what the Interface, Setting and what it was
    expecting.
    '''
    bond = {'mode': '5'}

    for binding in ['miimon', 'downdelay', 'updelay']:
        if binding in opts:
            try:
                int(opts[binding])
                bond.update({binding: opts[binding]})
            except Exception:  # pylint: disable=broad-except
                _raise_error_iface(iface, binding, ['integer'])
        else:
            _log_default_iface(iface, binding, bond_def[binding])
            bond.update({binding: bond_def[binding]})

    if 'use_carrier' in opts:
        if opts['use_carrier'] in _CONFIG_TRUE:
            bond.update({'use_carrier': '1'})
        elif opts['use_carrier'] in _CONFIG_FALSE:
            bond.update({'use_carrier': '0'})
        else:
            valid = _CONFIG_TRUE + _CONFIG_FALSE
            _raise_error_iface(iface, 'use_carrier', valid)
    else:
        _log_default_iface(iface, 'use_carrier', bond_def['use_carrier'])
        bond.update({'use_carrier': bond_def['use_carrier']})

    if 'primary' in opts:
        bond.update({'primary': opts['primary']})

    return bond


def _parse_settings_bond_6(opts, iface, bond_def):

    '''
    Filters given options and outputs valid settings for bond6.
    If an option has a value that is not expected, this
    function will log what the Interface, Setting and what it was
    expecting.
    '''
    bond = {'mode': '6'}

    for binding in ['miimon', 'downdelay', 'updelay']:
        if binding in opts:
            try:
                int(opts[binding])
                bond.update({binding: opts[binding]})
            except Exception:  # pylint: disable=broad-except
                _raise_error_iface(iface, binding, ['integer'])
        else:
            _log_default_iface(iface, binding, bond_def[binding])
            bond.update({binding: bond_def[binding]})

    if 'use_carrier' in opts:
        if opts['use_carrier'] in _CONFIG_TRUE:
            bond.update({'use_carrier': '1'})
        elif opts['use_carrier'] in _CONFIG_FALSE:
            bond.update({'use_carrier': '0'})
        else:
            valid = _CONFIG_TRUE + _CONFIG_FALSE
            _raise_error_iface(iface, 'use_carrier', valid)
    else:
        _log_default_iface(iface, 'use_carrier', bond_def['use_carrier'])
        bond.update({'use_carrier': bond_def['use_carrier']})

    if 'primary' in opts:
        bond.update({'primary': opts['primary']})

    return bond


def _parse_settings_vlan(opts, iface):

    '''
    Filters given options and outputs valid settings for a vlan
    '''
    vlan = {}
    if 'reorder_hdr' in opts:
        if opts['reorder_hdr'] in _CONFIG_TRUE + _CONFIG_FALSE:
            vlan.update({'reorder_hdr': opts['reorder_hdr']})
        else:
            valid = _CONFIG_TRUE + _CONFIG_FALSE
            _raise_error_iface(iface, 'reorder_hdr', valid)

    if 'vlan_id' in opts:
        if opts['vlan_id'] > 0:
            vlan.update({'vlan_id': opts['vlan_id']})
        else:
            _raise_error_iface(iface, 'vlan_id', 'Positive integer')

    if 'phys_dev' in opts:
        if len(opts['phys_dev']) > 0:
            vlan.update({'phys_dev': opts['phys_dev']})
        else:
            _raise_error_iface(iface, 'phys_dev', 'Non-empty string')

    return vlan


def _parse_settings_eth(opts, iface_type, enabled, iface):
    '''
    Filters given options and outputs valid settings for a
    network interface.
    '''
    result = {'name': iface}
    if 'proto' in opts:
        valid = ['none', 'bootp', 'dhcp']
        if opts['proto'] in valid:
            result['proto'] = opts['proto']
        else:
            _raise_error_iface(iface, opts['proto'], valid)

    if 'dns' in opts:
        result['dns'] = opts['dns']
        result['peerdns'] = 'yes'

    if 'mtu' in opts:
        try:
            result['mtu'] = int(opts['mtu'])
        except ValueError:
            _raise_error_iface(iface, 'mtu', ['integer'])

    if iface_type not in ['bridge']:
        ethtool = _parse_ethtool_opts(opts, iface)
        if ethtool:
            result['ethtool'] = ethtool

    if iface_type == 'slave':
        result['proto'] = 'none'

    if iface_type == 'bond':
        bonding = _parse_settings_bond(opts, iface)
        if bonding:
            result['bonding'] = bonding
            result['devtype'] = "Bond"

    if iface_type == 'vlan':
        vlan = _parse_settings_vlan(opts, iface)
        if vlan:
            result['devtype'] = "Vlan"
            for opt in vlan:
                result[opt] = opts[opt]

    if iface_type not in ['bond', 'vlan', 'bridge', 'ipip']:
        auto_addr = False
        if 'addr' in opts:
            if salt.utils.validate.net.mac(opts['addr']):
                result['addr'] = opts['addr']
            elif opts['addr'] == 'auto':
                auto_addr = True
            elif opts['addr'] != 'none':
                _raise_error_iface(iface, opts['addr'], ['AA:BB:CC:DD:EE:FF', 'auto', 'none'])
        else:
            auto_addr = True

        if auto_addr:
            # If interface type is slave for bond, not setting hwaddr
            if iface_type != 'slave':
                ifaces = __salt__['network.interfaces']()
                if iface in ifaces and 'hwaddr' in ifaces[iface]:
                    result['addr'] = ifaces[iface]['hwaddr']
    if iface_type == 'eth':
        result['devtype'] = 'Ethernet'
    if iface_type == 'bridge':
        result['devtype'] = 'Bridge'
        bypassfirewall = True
        valid = _CONFIG_TRUE + _CONFIG_FALSE
        for opt in ['bypassfirewall']:
            if opt in opts:
                if opts[opt] in _CONFIG_TRUE:
                    bypassfirewall = True
                elif opts[opt] in _CONFIG_FALSE:
                    bypassfirewall = False
                else:
                    _raise_error_iface(iface, opts[opt], valid)

        bridgectls = [
            'net.bridge.bridge-nf-call-ip6tables',
            'net.bridge.bridge-nf-call-iptables',
            'net.bridge.bridge-nf-call-arptables',
            ]

        if bypassfirewall:
            sysctl_value = 0
        else:
            sysctl_value = 1

        for sysctl in bridgectls:
            try:
                __salt__['sysctl.persist'](sysctl, sysctl_value)
            except CommandExecutionError:
                log.warning('Failed to set sysctl: %s', sysctl)

    else:
        if 'bridge' in opts:
            result['bridge'] = opts['bridge']

    if iface_type == 'ipip':
        result['devtype'] = 'IPIP'
        for opt in ['my_inner_ipaddr', 'my_outer_ipaddr']:
            if opt not in opts:
                _raise_error_iface(iface, opts[opt], ['1.2.3.4'])
            else:
                result[opt] = opts[opt]
    if iface_type == 'ib':
        result['devtype'] = 'InfiniBand'

    if 'prefix' in opts:
        if 'netmask' in opts:
            msg = 'Cannot use prefix and netmask together'
            log.error(msg)
            raise AttributeError(msg)
        result['prefix'] = opts['prefix']
    elif 'netmask' in opts:
        result['netmask'] = opts['netmask']

    for opt in ['ipaddr', 'master', 'srcaddr', 'delay', 'domain', 'gateway', 'uuid', 'nickname', 'zone']:
        if opt in opts:
            result[opt] = opts[opt]

    for opt in ['ipv6addr', 'ipv6gateway']:
        if opt in opts:
            result[opt] = opts[opt]

    if 'ipaddrs' in opts:
        result['ipaddrs'] = []
        for opt in opts['ipaddrs']:
            if salt.utils.validate.net.ipv4_addr(opt):
                ip, prefix = [i.strip() for i in opt.split('/')]
                result['ipaddrs'].append({'ipaddr': ip, 'prefix': prefix})
            else:
                msg = 'ipv4 CIDR is invalid'
                log.error(msg)
                raise AttributeError(msg)

    if 'ipv6addrs' in opts:
        for opt in opts['ipv6addrs']:
            if not salt.utils.validate.net.ipv6_addr(opt):
                msg = 'ipv6 CIDR is invalid'
                log.error(msg)
                raise AttributeError(msg)
            result['ipv6addrs'] = opts['ipv6addrs']

    if 'enable_ipv6' in opts:
        result['enable_ipv6'] = opts['enable_ipv6']

    valid = _CONFIG_TRUE + _CONFIG_FALSE
    for opt in ['onparent', 'peerdns', 'peerroutes', 'slave', 'vlan', 'defroute', 'stp', 'ipv6_peerdns',
                'ipv6_defroute', 'ipv6_peerroutes', 'ipv6_autoconf', 'ipv4_failure_fatal', 'dhcpv6c']:
        if opt in opts:
            if opts[opt] in _CONFIG_TRUE:
                result[opt] = 'yes'
            elif opts[opt] in _CONFIG_FALSE:
                result[opt] = 'no'
            else:
                _raise_error_iface(iface, opts[opt], valid)

    if 'onboot' in opts:
        log.warning(
            'The \'onboot\' option is controlled by the \'enabled\' option. '
            'Interface: %s Enabled: %s', iface, enabled
        )

    if enabled:
        result['onboot'] = 'yes'
    else:
        result['onboot'] = 'no'

    # If the interface is defined then we want to always take
    # control away from non-root users; unless the administrator
    # wants to allow non-root users to control the device.
    if 'userctl' in opts:
        if opts['userctl'] in _CONFIG_TRUE:
            result['userctl'] = 'yes'
        elif opts['userctl'] in _CONFIG_FALSE:
            result['userctl'] = 'no'
        else:
            _raise_error_iface(iface, opts['userctl'], valid)
    else:
        result['userctl'] = 'no'

    # This vlan is in opts, and should be only used in range interface
    # will affect jinja template for interface generating
    if 'vlan' in opts:
        if opts['vlan'] in _CONFIG_TRUE:
            result['vlan'] = 'yes'
        elif opts['vlan'] in _CONFIG_FALSE:
            result['vlan'] = 'no'
        else:
            _raise_error_iface(iface, opts['vlan'], valid)

    if 'arpcheck' in opts:
        if opts['arpcheck'] in _CONFIG_FALSE:
            result['arpcheck'] = 'no'

    if 'ipaddr_start' in opts:
        result['ipaddr_start'] = opts['ipaddr_start']

    if 'ipaddr_end' in opts:
        result['ipaddr_end'] = opts['ipaddr_end']

    if 'clonenum_start' in opts:
        result['clonenum_start'] = opts['clonenum_start']

    # If NetworkManager is available, we can control whether we use
    # it or not
    if 'nm_controlled' in opts:
        if opts['nm_controlled'] in _CONFIG_TRUE:
            result['nm_controlled'] = 'yes'
        elif opts['nm_controlled'] in _CONFIG_FALSE:
            result['nm_controlled'] = 'no'
        else:
            _raise_error_iface(iface, opts['nm_controlled'], valid)
    else:
        result['nm_controlled'] = 'no'

    return result


def _parse_routes(iface, opts):
    '''
    Filters given options and outputs valid settings for
    the route settings file.
    '''
    # Normalize keys
    opts = dict((k.lower(), v) for (k, v) in six.iteritems(opts))
    result = {}
    if 'routes' not in opts:
        _raise_error_routes(iface, 'routes', 'List of routes')

    for opt in opts:
        result[opt] = opts[opt]

    return result


def _parse_network_settings(opts, current):
    '''
    Filters given options and outputs valid settings for
    the global network settings file.
    '''
    # Normalize keys
    opts = dict((k.lower(), v) for (k, v) in six.iteritems(opts))
    current = dict((k.lower(), v) for (k, v) in six.iteritems(current))

    # Check for supported parameters
    retain_settings = opts.get('retain_settings', False)
    result = current if retain_settings else {}

    # Default quote type is an empty string, which will not quote values
    quote_type = ''

    valid = _CONFIG_TRUE + _CONFIG_FALSE
    if 'enabled' not in opts:
        try:
            opts['networking'] = current['networking']
            # If networking option is quoted, use its quote type
            quote_type = salt.utils.stringutils.is_quoted(opts['networking'])
            _log_default_network('networking', current['networking'])
        except ValueError:
            _raise_error_network('networking', valid)
    else:
        opts['networking'] = opts['enabled']

    true_val = '{0}yes{0}'.format(quote_type)
    false_val = '{0}no{0}'.format(quote_type)

    networking = salt.utils.stringutils.dequote(opts['networking'])
    if networking in valid:
        if networking in _CONFIG_TRUE:
            result['networking'] = true_val
        elif networking in _CONFIG_FALSE:
            result['networking'] = false_val
    else:
        _raise_error_network('networking', valid)

    if 'hostname' not in opts:
        try:
            opts['hostname'] = current['hostname']
            _log_default_network('hostname', current['hostname'])
        except Exception:  # pylint: disable=broad-except
            _raise_error_network('hostname', ['server1.example.com'])

    if opts['hostname']:
        result['hostname'] = '{1}{0}{1}'.format(
            salt.utils.stringutils.dequote(opts['hostname']), quote_type)
    else:
        _raise_error_network('hostname', ['server1.example.com'])

    if 'nozeroconf' in opts:
        nozeroconf = salt.utils.stringutils.dequote(opts['nozeroconf'])
        if nozeroconf in valid:
            if nozeroconf in _CONFIG_TRUE:
                result['nozeroconf'] = true_val
            elif nozeroconf in _CONFIG_FALSE:
                result['nozeroconf'] = false_val
        else:
            _raise_error_network('nozeroconf', valid)

    for opt in opts:
        if opt not in ['networking', 'hostname', 'nozeroconf']:
            result[opt] = '{1}{0}{1}'.format(
                salt.utils.stringutils.dequote(opts[opt]), quote_type)
    return result


def _raise_error_iface(iface, option, expected):
    '''
    Log and raise an error with a logical formatted message.
    '''
    msg = _error_msg_iface(iface, option, expected)
    log.error(msg)
    raise AttributeError(msg)


def _raise_error_network(option, expected):
    '''
    Log and raise an error with a logical formatted message.
    '''
    msg = _error_msg_network(option, expected)
    log.error(msg)
    raise AttributeError(msg)


def _raise_error_routes(iface, option, expected):
    '''
    Log and raise an error with a logical formatted message.
    '''
    msg = _error_msg_routes(iface, option, expected)
    log.error(msg)
    raise AttributeError(msg)


def _read_file(path):
    '''
    Reads and returns the contents of a file
    '''
    try:
        with salt.utils.files.fopen(path, 'rb') as rfh:
            lines = salt.utils.stringutils.to_unicode(rfh.read()).splitlines()
            try:
                lines.remove('')
            except ValueError:
                pass
            return lines
    except Exception:  # pylint: disable=broad-except
        return []  # Return empty list for type consistency


def _write_file_iface(iface, data, folder, pattern):
    '''
    Writes a file to disk
    '''
    filename = os.path.join(folder, pattern.format(iface))
    if not os.path.exists(folder):
        msg = '{0} cannot be written. {1} does not exist'
        msg = msg.format(filename, folder)
        log.error(msg)
        raise AttributeError(msg)
    with salt.utils.files.fopen(filename, 'w') as fp_:
        fp_.write(salt.utils.stringutils.to_str(data))


def _write_file_network(data, filename):
    '''
    Writes a file to disk
    '''
    with salt.utils.files.fopen(filename, 'w') as fp_:
        fp_.write(salt.utils.stringutils.to_str(data))


def _read_temp(data):
    lines = data.splitlines()
    try:  # Discard newlines if they exist
        lines.remove('')
    except ValueError:
        pass
    return lines


def build_bond(iface, **settings):
    '''
    Create a bond script in /etc/modprobe.d with the passed settings
    and load the bonding kernel module.

    CLI Example:

    .. code-block:: bash

        salt '*' ip.build_bond bond0 mode=balance-alb
    '''
    rh_major = __grains__['osrelease'][:1]

    opts = _parse_settings_bond(settings, iface)
    try:
        template = JINJA.get_template('conf.jinja')
    except jinja2.exceptions.TemplateNotFound:
        log.error('Could not load template conf.jinja')
        return ''
    data = template.render({'name': iface, 'bonding': opts})
    _write_file_iface(iface, data, _RH_NETWORK_CONF_FILES, '{0}.conf'.format(iface))
    path = os.path.join(_RH_NETWORK_CONF_FILES, '{0}.conf'.format(iface))
    if rh_major == '5':
        __salt__['cmd.run'](
            'sed -i -e "/^alias\\s{0}.*/d" /etc/modprobe.conf'.format(iface),
            python_shell=False
        )
        __salt__['cmd.run'](
            'sed -i -e "/^options\\s{0}.*/d" /etc/modprobe.conf'.format(iface),
            python_shell=False
        )
        __salt__['file.append']('/etc/modprobe.conf', path)
    __salt__['kmod.load']('bonding')

    if settings['test']:
        return _read_temp(data)

    return _read_file(path)


def build_interface(iface, iface_type, enabled, **settings):
    '''
    Build an interface script for a network interface.

    CLI Example:

    .. code-block:: bash

        salt '*' ip.build_interface eth0 eth <settings>
    '''
    if __grains__['os'] == 'Fedora':
        if __grains__['osmajorrelease'] >= 18:
            rh_major = '7'
        else:
            rh_major = '6'
    elif __grains__['os'] == 'Amazon':
        # TODO: Is there a better formula for this? -W. Werner, 2019-05-30
        # If not, it will need to be updated whenever Amazon releases
        # Amazon Linux 3
        if __grains__['osmajorrelease'] == 2:
            rh_major = '7'
        else:
            rh_major = '6'
    else:
        rh_major = __grains__['osrelease'][:1]

    iface_type = iface_type.lower()

    if iface_type not in _IFACE_TYPES:
        _raise_error_iface(iface, iface_type, _IFACE_TYPES)

    if iface_type == 'slave':
        settings['slave'] = 'yes'
        if 'master' not in settings:
            msg = 'master is a required setting for slave interfaces'
            log.error(msg)
            raise AttributeError(msg)

    if iface_type == 'vlan':
        settings['vlan'] = 'yes'

    if iface_type == 'bridge':
        __salt__['pkg.install']('bridge-utils')

    if iface_type in ['eth', 'bond', 'bridge', 'slave', 'vlan', 'ipip', 'ib', 'alias']:
        opts = _parse_settings_eth(settings, iface_type, enabled, iface)
        try:
            template = JINJA.get_template('rh{0}_eth.jinja'.format(rh_major))
        except jinja2.exceptions.TemplateNotFound:
            log.error(
                'Could not load template rh%s_eth.jinja',
                rh_major
            )
            return ''
        ifcfg = template.render(opts)

    if 'test' in settings and settings['test']:
        return _read_temp(ifcfg)

    _write_file_iface(iface, ifcfg, _RH_NETWORK_SCRIPT_DIR, 'ifcfg-{0}')
    path = os.path.join(_RH_NETWORK_SCRIPT_DIR, 'ifcfg-{0}'.format(iface))

    return _read_file(path)


def build_routes(iface, **settings):
    '''
    Build a route script for a network interface.

    CLI Example:

    .. code-block:: bash

        salt '*' ip.build_routes eth0 <settings>
    '''

    template = 'rh6_route_eth.jinja'
    try:
        if int(__grains__['osrelease'][0]) < 6:
            template = 'route_eth.jinja'
    except ValueError:
        pass
    log.debug('Template name: %s', template)

    opts = _parse_routes(iface, settings)
    log.debug("Opts: \n %s", opts)
    try:
        template = JINJA.get_template(template)
    except jinja2.exceptions.TemplateNotFound:
        log.error(
            'Could not load template %s',
            template
        )
        return ''
    opts6 = []
    opts4 = []
    for route in opts['routes']:
        ipaddr = route['ipaddr']
        if salt.utils.validate.net.ipv6_addr(ipaddr):
            opts6.append(route)
        else:
            opts4.append(route)
    log.debug("IPv4 routes:\n%s", opts4)
    log.debug("IPv6 routes:\n%s", opts6)

    routecfg = template.render(routes=opts4, iface=iface)
    routecfg6 = template.render(routes=opts6, iface=iface)

    if settings['test']:
        routes = _read_temp(routecfg)
        routes.extend(_read_temp(routecfg6))
        return routes

    _write_file_iface(iface, routecfg, _RH_NETWORK_SCRIPT_DIR, 'route-{0}')
    _write_file_iface(iface, routecfg6, _RH_NETWORK_SCRIPT_DIR, 'route6-{0}')

    path = os.path.join(_RH_NETWORK_SCRIPT_DIR, 'route-{0}'.format(iface))
    path6 = os.path.join(_RH_NETWORK_SCRIPT_DIR, 'route6-{0}'.format(iface))

    routes = _read_file(path)
    routes.extend(_read_file(path6))
    return routes


def down(iface, iface_type):
    '''
    Shutdown a network interface

    CLI Example:

    .. code-block:: bash

        salt '*' ip.down eth0
    '''
    # Slave devices are controlled by the master.
    if iface_type not in ['slave']:
        return __salt__['cmd.run']('ifdown {0}'.format(iface))
    return None


def get_bond(iface):
    '''
    Return the content of a bond script

    CLI Example:

    .. code-block:: bash

        salt '*' ip.get_bond bond0
    '''
    path = os.path.join(_RH_NETWORK_CONF_FILES, '{0}.conf'.format(iface))
    return _read_file(path)


def get_interface(iface):
    '''
    Return the contents of an interface script

    CLI Example:

    .. code-block:: bash

        salt '*' ip.get_interface eth0
    '''
    path = os.path.join(_RH_NETWORK_SCRIPT_DIR, 'ifcfg-{0}'.format(iface))
    return _read_file(path)


def up(iface, iface_type):  # pylint: disable=C0103
    '''
    Start up a network interface

    CLI Example:

    .. code-block:: bash

        salt '*' ip.up eth0
    '''
    # Slave devices are controlled by the master.
    if iface_type not in ['slave']:
        return __salt__['cmd.run']('ifup {0}'.format(iface))
    return None


def get_routes(iface):
    '''
    Return the contents of the interface routes script.

    CLI Example:

    .. code-block:: bash

        salt '*' ip.get_routes eth0
    '''
    path = os.path.join(_RH_NETWORK_SCRIPT_DIR, 'route-{0}'.format(iface))
    path6 = os.path.join(_RH_NETWORK_SCRIPT_DIR, 'route6-{0}'.format(iface))
    routes = _read_file(path)
    routes.extend(_read_file(path6))
    return routes


def get_network_settings():
    '''
    Return the contents of the global network script.

    CLI Example:

    .. code-block:: bash

        salt '*' ip.get_network_settings
    '''
    return _read_file(_RH_NETWORK_FILE)


def apply_network_settings(**settings):
    '''
    Apply global network configuration.

    CLI Example:

    .. code-block:: bash

        salt '*' ip.apply_network_settings
    '''
    if 'require_reboot' not in settings:
        settings['require_reboot'] = False

    if 'apply_hostname' not in settings:
        settings['apply_hostname'] = False

    hostname_res = True
    if settings['apply_hostname'] in _CONFIG_TRUE:
        if 'hostname' in settings:
            hostname_res = __salt__['network.mod_hostname'](settings['hostname'])
        else:
            log.warning(
                'The network state sls is trying to apply hostname '
                'changes but no hostname is defined.'
            )
            hostname_res = False

    res = True
    if settings['require_reboot'] in _CONFIG_TRUE:
        log.warning(
            'The network state sls is requiring a reboot of the system to '
            'properly apply network configuration.'
        )
        res = True
    else:
        res = __salt__['service.restart']('network')

    return hostname_res and res


def build_network_settings(**settings):
    '''
    Build the global network script.

    CLI Example:

    .. code-block:: bash

        salt '*' ip.build_network_settings <settings>
    '''
    # Read current configuration and store default values
    current_network_settings = _parse_rh_config(_RH_NETWORK_FILE)

    # Build settings
    opts = _parse_network_settings(settings, current_network_settings)
    try:
        template = JINJA.get_template('network.jinja')
    except jinja2.exceptions.TemplateNotFound:
        log.error('Could not load template network.jinja')
        return ''
    network = template.render(opts)

    if settings['test']:
        return _read_temp(network)

    # Write settings
    _write_file_network(network, _RH_NETWORK_FILE)

    return _read_file(_RH_NETWORK_FILE)
