#!/usr/bin/python
from __future__ import (absolute_import, division, print_function)
# Copyright 2019-2020 Fortinet, Inc.
#
# This program 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.
#
# This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.

__metaclass__ = type

ANSIBLE_METADATA = {'status': ['preview'],
                    'supported_by': 'community',
                    'metadata_version': '1.1'}

DOCUMENTATION = '''
---
module: fortios_firewall_vip46
short_description: Configure IPv4 to IPv6 virtual IPs in Fortinet's FortiOS and FortiGate.
description:
    - This module is able to configure a FortiGate or FortiOS (FOS) device by allowing the
      user to set and modify firewall feature and vip46 category.
      Examples include all parameters and values need to be adjusted to datasources before usage.
      Tested with FOS v6.0.0
version_added: "2.8"
author:
    - Link Zheng (@chillancezen)
    - Jie Xue (@JieX19)
    - Hongbin Lu (@fgtdev-hblu)
    - Frank Shen (@frankshen01)
    - Miguel Angel Munoz (@mamunozgonzalez)
    - Nicolas Thomas (@thomnico)
notes:
    - Legacy fortiosapi has been deprecated, httpapi is the preferred way to run playbooks

requirements:
    - ansible>=2.9.0
options:
    access_token:
        description:
            - Token-based authentication.
              Generated from GUI of Fortigate.
        type: str
        required: false
    vdom:
        description:
            - Virtual domain, among those defined previously. A vdom is a
              virtual instance of the FortiGate that can be configured and
              used as a different unit.
        type: str
        default: root

    state:
        description:
            - Indicates whether to create or remove the object.
              This attribute was present already in previous version in a deeper level.
              It has been moved out to this outer level.
        type: str
        required: false
        choices:
            - present
            - absent
        version_added: 2.9
    firewall_vip46:
        description:
            - Configure IPv4 to IPv6 virtual IPs.
        default: null
        type: dict
        suboptions:
            state:
                description:
                    - B(Deprecated)
                    - Starting with Ansible 2.9 we recommend using the top-level 'state' parameter.
                    - HORIZONTALLINE
                    - Indicates whether to create or remove the object.
                type: str
                required: false
                choices:
                    - present
                    - absent
            arp_reply:
                description:
                    - Enable ARP reply.
                type: str
                choices:
                    - disable
                    - enable
            color:
                description:
                    - Color of icon on the GUI.
                type: int
            comment:
                description:
                    - Comment.
                type: str
            extip:
                description:
                    - Start-external-IP [-end-external-IP].
                type: str
            extport:
                description:
                    - External service port.
                type: str
            id:
                description:
                    - Custom defined id.
                type: int
            ldb_method:
                description:
                    - Load balance method.
                type: str
                choices:
                    - static
                    - round-robin
                    - weighted
                    - least-session
                    - least-rtt
                    - first-alive
            mappedip:
                description:
                    - Start-mapped-IP [-end mapped-IP].
                type: str
            mappedport:
                description:
                    - Mapped service port.
                type: str
            monitor:
                description:
                    - Health monitors.
                type: list
                suboptions:
                    name:
                        description:
                            - Health monitor name. Source firewall.ldb-monitor.name.
                        required: true
                        type: str
            name:
                description:
                    - VIP46 name.
                required: true
                type: str
            portforward:
                description:
                    - Enable port forwarding.
                type: str
                choices:
                    - disable
                    - enable
            protocol:
                description:
                    - Mapped port protocol.
                type: str
                choices:
                    - tcp
                    - udp
            realservers:
                description:
                    - Real servers.
                type: list
                suboptions:
                    client_ip:
                        description:
                            - Restrict server to a client IP in this range.
                        type: str
                    healthcheck:
                        description:
                            - Per server health check.
                        type: str
                        choices:
                            - disable
                            - enable
                            - vip
                    holddown_interval:
                        description:
                            - Hold down interval.
                        type: int
                    id:
                        description:
                            - Real server ID.
                        required: true
                        type: int
                    ip:
                        description:
                            - Mapped server IPv6.
                        type: str
                    max_connections:
                        description:
                            - Maximum number of connections allowed to server.
                        type: int
                    monitor:
                        description:
                            - Health monitors. Source firewall.ldb-monitor.name.
                        type: str
                    port:
                        description:
                            - Mapped server port.
                        type: int
                    status:
                        description:
                            - Server administrative status.
                        type: str
                        choices:
                            - active
                            - standby
                            - disable
                    weight:
                        description:
                            - weight
                        type: int
            server_type:
                description:
                    - Server type.
                type: str
                choices:
                    - http
                    - tcp
                    - udp
                    - ip
            src_filter:
                description:
                    - Source IP filter (x.x.x.x/x).
                type: list
                suboptions:
                    range:
                        description:
                            - Src-filter range.
                        required: true
                        type: str
            type:
                description:
                    - 'VIP type: static NAT or server load balance.'
                type: str
                choices:
                    - static-nat
                    - server-load-balance
            uuid:
                description:
                    - Universally Unique Identifier (UUID; automatically assigned but can be manually reset).
                type: str
'''

EXAMPLES = '''
- hosts: fortigates
  collections:
    - fortinet.fortios
  connection: httpapi
  vars:
   vdom: "root"
   ansible_httpapi_use_ssl: yes
   ansible_httpapi_validate_certs: no
   ansible_httpapi_port: 443
  tasks:
  - name: Configure IPv4 to IPv6 virtual IPs.
    fortios_firewall_vip46:
      vdom:  "{{ vdom }}"
      state: "present"
      access_token: "<your_own_value>"
      firewall_vip46:
        arp_reply: "disable"
        color: "4"
        comment: "Comment."
        extip: "<your_own_value>"
        extport: "<your_own_value>"
        id:  "8"
        ldb_method: "static"
        mappedip: "<your_own_value>"
        mappedport: "<your_own_value>"
        monitor:
         -
            name: "default_name_13 (source firewall.ldb-monitor.name)"
        name: "default_name_14"
        portforward: "disable"
        protocol: "tcp"
        realservers:
         -
            client_ip: "<your_own_value>"
            healthcheck: "disable"
            holddown_interval: "20"
            id:  "21"
            ip: "<your_own_value>"
            max_connections: "23"
            monitor: "<your_own_value> (source firewall.ldb-monitor.name)"
            port: "25"
            status: "active"
            weight: "27"
        server_type: "http"
        src_filter:
         -
            range: "<your_own_value>"
        type: "static-nat"
        uuid: "<your_own_value>"

'''

RETURN = '''
build:
  description: Build number of the fortigate image
  returned: always
  type: str
  sample: '1547'
http_method:
  description: Last method used to provision the content into FortiGate
  returned: always
  type: str
  sample: 'PUT'
http_status:
  description: Last result given by FortiGate on last operation applied
  returned: always
  type: str
  sample: "200"
mkey:
  description: Master key (id) used in the last call to FortiGate
  returned: success
  type: str
  sample: "id"
name:
  description: Name of the table used to fulfill the request
  returned: always
  type: str
  sample: "urlfilter"
path:
  description: Path of the table used to fulfill the request
  returned: always
  type: str
  sample: "webfilter"
revision:
  description: Internal revision number
  returned: always
  type: str
  sample: "17.0.2.10658"
serial:
  description: Serial number of the unit
  returned: always
  type: str
  sample: "FGVMEVYYQT3AB5352"
status:
  description: Indication of the operation's result
  returned: always
  type: str
  sample: "success"
vdom:
  description: Virtual domain used
  returned: always
  type: str
  sample: "root"
version:
  description: Version of the FortiGate
  returned: always
  type: str
  sample: "v5.6.3"

'''

from ansible.module_utils.basic import AnsibleModule
from ansible.module_utils.connection import Connection
from ansible_collections.fortinet.fortios.plugins.module_utils.fortios.fortios import FortiOSHandler
from ansible_collections.fortinet.fortios.plugins.module_utils.fortios.fortios import check_legacy_fortiosapi
from ansible_collections.fortinet.fortios.plugins.module_utils.fortimanager.common import FAIL_SOCKET_MSG


def filter_firewall_vip46_data(json):
    option_list = ['arp_reply', 'color', 'comment',
                   'extip', 'extport', 'id',
                   'ldb_method', 'mappedip', 'mappedport',
                   'monitor', 'name', 'portforward',
                   'protocol', 'realservers', 'server_type',
                   'src_filter', 'type', 'uuid']
    dictionary = {}

    for attribute in option_list:
        if attribute in json and json[attribute] is not None:
            dictionary[attribute] = json[attribute]

    return dictionary


def underscore_to_hyphen(data):
    if isinstance(data, list):
        for i, elem in enumerate(data):
            data[i] = underscore_to_hyphen(elem)
    elif isinstance(data, dict):
        new_data = {}
        for k, v in data.items():
            new_data[k.replace('_', '-')] = underscore_to_hyphen(v)
        data = new_data

    return data


def firewall_vip46(data, fos):
    vdom = data['vdom']
    if 'state' in data and data['state']:
        state = data['state']
    elif 'state' in data['firewall_vip46'] and data['firewall_vip46']['state']:
        state = data['firewall_vip46']['state']
    else:
        state = True
    firewall_vip46_data = data['firewall_vip46']
    filtered_data = underscore_to_hyphen(filter_firewall_vip46_data(firewall_vip46_data))

    if state == "present":
        return fos.set('firewall',
                       'vip46',
                       data=filtered_data,
                       vdom=vdom)

    elif state == "absent":
        return fos.delete('firewall',
                          'vip46',
                          mkey=filtered_data['name'],
                          vdom=vdom)
    else:
        fos._module.fail_json(msg='state must be present or absent!')


def is_successful_status(status):
    return status['status'] == "success" or \
        status['http_method'] == "DELETE" and status['http_status'] == 404


def fortios_firewall(data, fos):

    if data['firewall_vip46']:
        resp = firewall_vip46(data, fos)
    else:
        fos._module.fail_json(msg='missing task body: %s' % ('firewall_vip46'))

    return not is_successful_status(resp), \
        resp['status'] == "success" and \
        (resp['revision_changed'] if 'revision_changed' in resp else True), \
        resp


def main():
    mkeyname = 'name'
    fields = {
        "access_token": {"required": False, "type": "str", "no_log": True},
        "vdom": {"required": False, "type": "str", "default": "root"},
        "state": {"required": False, "type": "str",
                  "choices": ["present", "absent"]},
        "firewall_vip46": {
            "required": False, "type": "dict", "default": None,
            "options": {
                "state": {"required": False, "type": "str",
                          "choices": ["present", "absent"]},
                "arp_reply": {"required": False, "type": "str",
                              "choices": ["disable",
                                          "enable"]},
                "color": {"required": False, "type": "int"},
                "comment": {"required": False, "type": "str"},
                "extip": {"required": False, "type": "str"},
                "extport": {"required": False, "type": "str"},
                "id": {"required": False, "type": "int"},
                "ldb_method": {"required": False, "type": "str",
                               "choices": ["static",
                                           "round-robin",
                                           "weighted",
                                           "least-session",
                                           "least-rtt",
                                           "first-alive"]},
                "mappedip": {"required": False, "type": "str"},
                "mappedport": {"required": False, "type": "str"},
                "monitor": {"required": False, "type": "list",
                            "options": {
                                "name": {"required": True, "type": "str"}
                            }},
                "name": {"required": True, "type": "str"},
                "portforward": {"required": False, "type": "str",
                                "choices": ["disable",
                                            "enable"]},
                "protocol": {"required": False, "type": "str",
                             "choices": ["tcp",
                                         "udp"]},
                "realservers": {"required": False, "type": "list",
                                "options": {
                                    "client_ip": {"required": False, "type": "str"},
                                    "healthcheck": {"required": False, "type": "str",
                                                    "choices": ["disable",
                                                                "enable",
                                                                "vip"]},
                                    "holddown_interval": {"required": False, "type": "int"},
                                    "id": {"required": True, "type": "int"},
                                    "ip": {"required": False, "type": "str"},
                                    "max_connections": {"required": False, "type": "int"},
                                    "monitor": {"required": False, "type": "str"},
                                    "port": {"required": False, "type": "int"},
                                    "status": {"required": False, "type": "str",
                                               "choices": ["active",
                                                           "standby",
                                                           "disable"]},
                                    "weight": {"required": False, "type": "int"}
                                }},
                "server_type": {"required": False, "type": "str",
                                "choices": ["http",
                                            "tcp",
                                            "udp",
                                            "ip"]},
                "src_filter": {"required": False, "type": "list",
                               "options": {
                                   "range": {"required": True, "type": "str"}
                               }},
                "type": {"required": False, "type": "str",
                         "choices": ["static-nat",
                                     "server-load-balance"]},
                "uuid": {"required": False, "type": "str"}

            }
        }
    }

    check_legacy_fortiosapi()
    module = AnsibleModule(argument_spec=fields,
                           supports_check_mode=False)

    versions_check_result = None
    if module._socket_path:
        connection = Connection(module._socket_path)
        if 'access_token' in module.params:
            connection.set_option('access_token', module.params['access_token'])

        fos = FortiOSHandler(connection, module, mkeyname)

        is_error, has_changed, result = fortios_firewall(module.params, fos)
        versions_check_result = connection.get_system_version()
    else:
        module.fail_json(**FAIL_SOCKET_MSG)

    if versions_check_result and versions_check_result['matched'] is False:
        module.warn("Ansible has detected version mismatch between FortOS system and galaxy, see more details by specifying option -vvv")

    if not is_error:
        if versions_check_result and versions_check_result['matched'] is False:
            module.exit_json(changed=has_changed, version_check_warning=versions_check_result, meta=result)
        else:
            module.exit_json(changed=has_changed, meta=result)
    else:
        if versions_check_result and versions_check_result['matched'] is False:
            module.fail_json(msg="Error in repo", version_check_warning=versions_check_result, meta=result)
        else:
            module.fail_json(msg="Error in repo", meta=result)


if __name__ == '__main__':
    main()
