#!/usr/bin/python
from __future__ import (absolute_import, division, print_function)
# Copyright 2019 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_authentication_rule
short_description: Configure Authentication Rules 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 authentication feature and rule category.
      Examples include all parameters and values need to be adjusted to datasources before usage.
      Tested with FOS v6.0.5
version_added: "2.8"
author:
    - Miguel Angel Munoz (@mamunozgonzalez)
    - Nicolas Thomas (@thomnico)
notes:
    - Requires fortiosapi library developed by Fortinet
    - Run as a local_action in your playbook
requirements:
    - fortiosapi>=0.9.8
options:
    host:
        description:
            - FortiOS or FortiGate IP address.
        type: str
        required: false
    username:
        description:
            - FortiOS or FortiGate username.
        type: str
        required: false
    password:
        description:
            - FortiOS or FortiGate password.
        type: str
        default: ""
    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
    https:
        description:
            - Indicates if the requests towards FortiGate must use HTTPS protocol.
        type: bool
        default: true
    ssl_verify:
        description:
            - Ensures FortiGate certificate must be verified by a proper CA.
        type: bool
        default: true
        version_added: 2.9
    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
    authentication_rule:
        description:
            - Configure Authentication Rules.
        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
            active_auth_method:
                description:
                    - Select an active authentication method. Source authentication.scheme.name.
                type: str
            comments:
                description:
                    - Comment.
                type: str
            ip_based:
                description:
                    - Enable/disable IP-based authentication. Once a user authenticates all traffic from the IP address the user authenticated from is allowed.
                type: str
                choices:
                    - enable
                    - disable
            name:
                description:
                    - Authentication rule name.
                required: true
                type: str
            protocol:
                description:
                    - Select the protocol to use for authentication . Users connect to the FortiGate using this protocol and are asked to authenticate.
                type: str
                choices:
                    - http
                    - ftp
                    - socks
                    - ssh
            srcaddr:
                description:
                    - Select an IPv4 source address from available options. Required for web proxy authentication.
                type: list
                suboptions:
                    name:
                        description:
                            - Address name. Source firewall.address.name firewall.addrgrp.name firewall.proxy-address.name firewall.proxy-addrgrp.name.
                        required: true
                        type: str
            srcaddr6:
                description:
                    - Select an IPv6 source address. Required for web proxy authentication.
                type: list
                suboptions:
                    name:
                        description:
                            - Address name. Source firewall.address6.name firewall.addrgrp6.name.
                        required: true
                        type: str
            sso_auth_method:
                description:
                    - Select a single-sign on (SSO) authentication method. Source authentication.scheme.name.
                type: str
            status:
                description:
                    - Enable/disable this authentication rule.
                type: str
                choices:
                    - enable
                    - disable
            transaction_based:
                description:
                    - Enable/disable transaction based authentication .
                type: str
                choices:
                    - enable
                    - disable
            web_auth_cookie:
                description:
                    - Enable/disable Web authentication cookies .
                type: str
                choices:
                    - enable
                    - disable
'''

EXAMPLES = '''
- hosts: localhost
  vars:
   host: "192.168.122.40"
   username: "admin"
   password: ""
   vdom: "root"
   ssl_verify: "False"
  tasks:
  - name: Configure Authentication Rules.
    fortios_authentication_rule:
      host:  "{{ host }}"
      username: "{{ username }}"
      password: "{{ password }}"
      vdom:  "{{ vdom }}"
      https: "False"
      state: "present"
      authentication_rule:
        active_auth_method: "<your_own_value> (source authentication.scheme.name)"
        comments: "<your_own_value>"
        ip_based: "enable"
        name: "default_name_6"
        protocol: "http"
        srcaddr:
         -
            name: "default_name_9 (source firewall.address.name firewall.addrgrp.name firewall.proxy-address.name firewall.proxy-addrgrp.name)"
        srcaddr6:
         -
            name: "default_name_11 (source firewall.address6.name firewall.addrgrp6.name)"
        sso_auth_method: "<your_own_value> (source authentication.scheme.name)"
        status: "enable"
        transaction_based: "enable"
        web_auth_cookie: "enable"
'''

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.module_utils.network.fortios.fortios import FortiOSHandler
from ansible.module_utils.network.fortimanager.common import FAIL_SOCKET_MSG


def login(data, fos):
    host = data['host']
    username = data['username']
    password = data['password']
    ssl_verify = data['ssl_verify']

    fos.debug('on')
    if 'https' in data and not data['https']:
        fos.https('off')
    else:
        fos.https('on')

    fos.login(host, username, password, verify=ssl_verify)


def filter_authentication_rule_data(json):
    option_list = ['active_auth_method', 'comments', 'ip_based',
                   'name', 'protocol', 'srcaddr',
                   'srcaddr6', 'sso_auth_method', 'status',
                   'transaction_based', 'web_auth_cookie']
    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 elem in data:
            elem = 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 authentication_rule(data, fos):
    vdom = data['vdom']
    if 'state' in data and data['state']:
        state = data['state']
    elif 'state' in data['authentication_rule'] and data['authentication_rule']:
        state = data['authentication_rule']['state']
    else:
        state = True
    authentication_rule_data = data['authentication_rule']
    filtered_data = underscore_to_hyphen(filter_authentication_rule_data(authentication_rule_data))

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

    elif state == "absent":
        return fos.delete('authentication',
                          'rule',
                          mkey=filtered_data['name'],
                          vdom=vdom)


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


def fortios_authentication(data, fos):

    if data['authentication_rule']:
        resp = authentication_rule(data, fos)

    return not is_successful_status(resp), \
        resp['status'] == "success", \
        resp


def main():
    fields = {
        "host": {"required": False, "type": "str"},
        "username": {"required": False, "type": "str"},
        "password": {"required": False, "type": "str", "default": "", "no_log": True},
        "vdom": {"required": False, "type": "str", "default": "root"},
        "https": {"required": False, "type": "bool", "default": True},
        "ssl_verify": {"required": False, "type": "bool", "default": True},
        "state": {"required": False, "type": "str",
                  "choices": ["present", "absent"]},
        "authentication_rule": {
            "required": False, "type": "dict", "default": None,
            "options": {
                "state": {"required": False, "type": "str",
                          "choices": ["present", "absent"]},
                "active_auth_method": {"required": False, "type": "str"},
                "comments": {"required": False, "type": "str"},
                "ip_based": {"required": False, "type": "str",
                             "choices": ["enable", "disable"]},
                "name": {"required": True, "type": "str"},
                "protocol": {"required": False, "type": "str",
                             "choices": ["http", "ftp", "socks",
                                         "ssh"]},
                "srcaddr": {"required": False, "type": "list",
                            "options": {
                                "name": {"required": True, "type": "str"}
                            }},
                "srcaddr6": {"required": False, "type": "list",
                             "options": {
                                 "name": {"required": True, "type": "str"}
                             }},
                "sso_auth_method": {"required": False, "type": "str"},
                "status": {"required": False, "type": "str",
                           "choices": ["enable", "disable"]},
                "transaction_based": {"required": False, "type": "str",
                                      "choices": ["enable", "disable"]},
                "web_auth_cookie": {"required": False, "type": "str",
                                    "choices": ["enable", "disable"]}

            }
        }
    }

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

    # legacy_mode refers to using fortiosapi instead of HTTPAPI
    legacy_mode = 'host' in module.params and module.params['host'] is not None and \
                  'username' in module.params and module.params['username'] is not None and \
                  'password' in module.params and module.params['password'] is not None

    if not legacy_mode:
        if module._socket_path:
            connection = Connection(module._socket_path)
            fos = FortiOSHandler(connection)

            is_error, has_changed, result = fortios_authentication(module.params, fos)
        else:
            module.fail_json(**FAIL_SOCKET_MSG)
    else:
        try:
            from fortiosapi import FortiOSAPI
        except ImportError:
            module.fail_json(msg="fortiosapi module is required")

        fos = FortiOSAPI()

        login(module.params, fos)
        is_error, has_changed, result = fortios_authentication(module.params, fos)
        fos.logout()

    if not is_error:
        module.exit_json(changed=has_changed, meta=result)
    else:
        module.fail_json(msg="Error in repo", meta=result)


if __name__ == '__main__':
    main()
