# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.

from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

import re

from ansible.module_utils.facts.network.base import NetworkCollector
from ansible.module_utils.facts.network.generic_bsd import GenericBsdIfconfigNetwork


class SunOSNetwork(GenericBsdIfconfigNetwork):
    """
    This is the SunOS Network Class.
    It uses the GenericBsdIfconfigNetwork.

    Solaris can have different FLAGS and MTU for IPv4 and IPv6 on the same interface
    so these facts have been moved inside the 'ipv4' and 'ipv6' lists.
    """
    platform = 'SunOS'

    # Solaris 'ifconfig -a' will print interfaces twice, once for IPv4 and again for IPv6.
    # MTU and FLAGS also may differ between IPv4 and IPv6 on the same interface.
    # 'parse_interface_line()' checks for previously seen interfaces before defining
    # 'current_if' so that IPv6 facts don't clobber IPv4 facts (or vice versa).
    def get_interfaces_info(self, ifconfig_path):
        interfaces = {}
        current_if = {}
        ips = dict(
            all_ipv4_addresses=[],
            all_ipv6_addresses=[],
        )
        rc, out, err = self.module.run_command([ifconfig_path, '-a'])

        for line in out.splitlines():

            if line:
                words = line.split()

                if re.match(r'^\S', line) and len(words) > 3:
                    current_if = self.parse_interface_line(words, current_if, interfaces)
                    interfaces[current_if['device']] = current_if
                elif words[0].startswith('options='):
                    self.parse_options_line(words, current_if, ips)
                elif words[0] == 'nd6':
                    self.parse_nd6_line(words, current_if, ips)
                elif words[0] == 'ether':
                    self.parse_ether_line(words, current_if, ips)
                elif words[0] == 'media:':
                    self.parse_media_line(words, current_if, ips)
                elif words[0] == 'status:':
                    self.parse_status_line(words, current_if, ips)
                elif words[0] == 'lladdr':
                    self.parse_lladdr_line(words, current_if, ips)
                elif words[0] == 'inet':
                    self.parse_inet_line(words, current_if, ips)
                elif words[0] == 'inet6':
                    self.parse_inet6_line(words, current_if, ips)
                else:
                    self.parse_unknown_line(words, current_if, ips)

        # 'parse_interface_line' and 'parse_inet*_line' leave two dicts in the
        # ipv4/ipv6 lists which is ugly and hard to read.
        # This quick hack merges the dictionaries. Purely cosmetic.
        for iface in interfaces:
            for v in 'ipv4', 'ipv6':
                combined_facts = {}
                for facts in interfaces[iface][v]:
                    combined_facts.update(facts)
                if len(combined_facts.keys()) > 0:
                    interfaces[iface][v] = [combined_facts]

        return interfaces, ips

    def parse_interface_line(self, words, current_if, interfaces):
        device = words[0][0:-1]
        if device not in interfaces:
            current_if = {'device': device, 'ipv4': [], 'ipv6': [], 'type': 'unknown'}
        else:
            current_if = interfaces[device]
        flags = self.get_options(words[1])
        v = 'ipv4'
        if 'IPv6' in flags:
            v = 'ipv6'
        if 'LOOPBACK' in flags:
            current_if['type'] = 'loopback'
        current_if[v].append({'flags': flags, 'mtu': words[3]})
        current_if['macaddress'] = 'unknown'    # will be overwritten later
        return current_if

    # Solaris displays single digit octets in MAC addresses e.g. 0:1:2:d:e:f
    # Add leading zero to each octet where needed.
    def parse_ether_line(self, words, current_if, ips):
        macaddress = ''
        for octet in words[1].split(':'):
            octet = ('0' + octet)[-2:None]
            macaddress += (octet + ':')
        current_if['macaddress'] = macaddress[0:-1]


class SunOSNetworkCollector(NetworkCollector):
    _fact_class = SunOSNetwork
    _platform = 'SunOS'