#!/usr/bin/python
# -*- coding: utf-8 -*-

# Copyright: (c) <year>, <Name> (@<github id>)
# GNU General Public License v3.0+ (see LICENSE or https://www.gnu.org/licenses/gpl-3.0.txt)

from __future__ import absolute_import, division, print_function
__metaclass__ = type

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

DOCUMENTATION = r'''
---
module: aci_dhcp_relay_provider
short_description: Manage DHCP relay policy providers.
description:
- Manage DHCP relay policy providers (dhcpRsProv) configuration on Cisco ACI fabrics.
options:
  tenant:
    description:
    - Name of the tenant the relay_policy is in.
    type: str
  relay_policy:
    description:
    - Name of an existing DHCP relay policy
    type: str
    aliases: [ relay_policy_name ]
  provider_tenant:
    description:
    - Name of the tenant the epg or external_epg is in
    - Only required if the epg or external_epg is in a different tenant than the relay_policy
    type: str
  epg_type:
    description:
    - Type of EPG the DHCP server is in
    type: str
    choices: [ epg, l2_external, l3_external, dn ]
    required: yes
  anp:
    description:
    - Application Profile the EPG is in.
    - Only used when epg_type is app_epg.
    type: str
  epg:
    description:
    - Name of the Application EPG the DHCP server is in.
    - Only used when epg_type is epg
    type: str
    aliases: [ app_epg ]
  l2out_name:
    description:
    - Name of the L2out the DHCP server is in.
    - Only used when epg_type is l2_external
    type: str
  l3out_name:
    description:
    - Name of the L3out the DHCP server is in.
    - Only used when epg_type is l3_external.
    type: str
  external_epg:
    description:
    - Name of the external network object the DHCP server is in.
    - Only used when epg_type is l2_external or l3_external.
    type: str
    aliases: [ external_net ]
  dn:
    description:
    - dn of the EPG the DHCP server is in
    - Only used when epg_type is dn
    type: str
  dhcp_server_addr:
    description:
    - DHCP server address
    type: str
  state:
    description:
    - Use C(present) or C(absent) for adding or removing.
    - Use C(query) for listing an object or multiple objects.
    type: str
    choices: [ absent, present, query ]
    default: present
extends_documentation_fragment:
- cisco.aci.aci

notes:
- The C(tenant) and C(relay_policy) must exist before using this module in your playbook.
  The M(cisco.aci.aci_tenant) and C(cisco.aci.aci_dhcp_relay) modules can be used for this.
seealso:
- name: APIC Management Information Model reference
  description: More information about the internal APIC class B(dhcpRsProv).
  link: https://developer.cisco.com/docs/apic-mim-ref/
author:
- Tim Cragg (@timcragg)
'''

EXAMPLES = r'''
- name: Add a new DHCP relay App EPG provider
  cisco.aci.aci_dhcp_relay_provider:
    host: apic
    username: admin
    password: SomeSecretPassword
    tenant: Auto-Demo
    relay_policy: my_dhcp_relay
    epg_type: epg
    anp: my_anp
    epg: my_app_epg
    dhcp_server_addr: 10.20.30.40
    state: present
  delegate_to: localhost

- name: Add a new DHCP relay L3out provider
  cisco.aci.aci_dhcp_relay_provider:
    host: apic
    username: admin
    password: SomeSecretPassword
    tenant: Auto-Demo
    relay_policy: my_dhcp_relay
    epg_type: l3_external
    l3out_name: my_l3out
    external_net: my_l3out_ext_net
    dhcp_server_addr: 10.20.30.40
    state: present
  delegate_to: localhost

- name: Remove a DHCP relay provider
  cisco.aci.aci_dhcp_relay_provider:
    host: apic
    username: admin
    password: SomeSecretPassword
    tenant: Auto-Demo
    relay_policy: my_dhcp_relay
    epg_type: epg
    anp: my_anp
    epg: my_app_epg
    state: absent
  delegate_to: localhost

- name: Query a DHCP relay provider
  cisco.aci.aci_dhcp_relay_provider:
    host: apic
    username: admin
    password: SomeSecretPassword
    tenant: Auto-Demo
    relay_policy: my_dhcp_relay
    epg_type: epg
    anp: my_anp
    epg: my_app_epg
    state: query
  delegate_to: localhost
  register: query_result
'''

RETURN = r'''
   current:
     description: The existing configuration from the APIC after the module has finished
     returned: success
     type: list
     sample:
       [
           {
               "fvTenant": {
                   "attributes": {
                       "descr": "Production environment",
                       "dn": "uni/tn-production",
                       "name": "production",
                       "nameAlias": "",
                       "ownerKey": "",
                       "ownerTag": ""
                   }
               }
           }
       ]
   error:
     description: The error information as returned from the APIC
     returned: failure
     type: dict
     sample:
       {
           "code": "122",
           "text": "unknown managed object class foo"
       }
   raw:
     description: The raw output returned by the APIC REST API (xml or json)
     returned: parse error
     type: str
     sample: '<?xml version="1.0" encoding="UTF-8"?><imdata totalCount="1"><error code="122" text="unknown managed object class "/></imdata>'
   sent:
     description: The actual/minimal configuration pushed to the APIC
     returned: info
     type: list
     sample:
       {
           "fvTenant": {
               "attributes": {
                   "descr": "Production environment"
               }
           }
       }
   previous:
     description: The original configuration from the APIC before the module has started
     returned: info
     type: list
     sample:
       [
           {
               "fvTenant": {
                   "attributes": {
                       "descr": "Production",
                       "dn": "uni/tn-production",
                       "name": "production",
                       "nameAlias": "",
                       "ownerKey": "",
                       "ownerTag": ""
                   }
               }
           }
       ]
   proposed:
     description: The assembled configuration from the user-provided parameters
     returned: info
     type: dict
     sample:
       {
           "fvTenant": {
               "attributes": {
                   "descr": "Production environment",
                   "name": "production"
               }
           }
       }
   filter_string:
     description: The filter string used for the request
     returned: failure or debug
     type: str
     sample: ?rsp-prop-include=config-only
   method:
     description: The HTTP method used for the request to the APIC
     returned: failure or debug
     type: str
     sample: POST
   response:
     description: The HTTP response from the APIC
     returned: failure or debug
     type: str
     sample: OK (30 bytes)
   status:
     description: The HTTP status from the APIC
     returned: failure or debug
     type: int
     sample: 200
   url:
     description: The HTTP url used for the request to the APIC
     returned: failure or debug
     type: str
     sample: https://10.11.12.13/api/mo/uni/tn-production.json
   '''

from ansible.module_utils.basic import AnsibleModule
from ansible_collections.cisco.aci.plugins.module_utils.aci import ACIModule, aci_argument_spec


def main():
    argument_spec = aci_argument_spec()
    argument_spec.update(
        relay_policy=dict(type='str', aliases=['relay_policy_name']),
        epg_type=dict(type='str', required=True,
                      choices=['epg',
                               'l2_external',
                               'l3_external',
                               'dn']),
        anp=dict(type='str'),
        epg=dict(type='str', aliases=['app_epg']),
        l2out_name=dict(type='str'),
        l3out_name=dict(type='str'),
        external_epg=dict(type='str', aliases=['external_net']),
        dhcp_server_addr=dict(type='str'),
        state=dict(type='str', default='present',
                   choices=['absent', 'present', 'query']),
        tenant=dict(type='str'),
        provider_tenant=dict(type='str'),
        dn=dict(type='str'),
    )

    module = AnsibleModule(
        argument_spec=argument_spec,
        supports_check_mode=True,
        required_if=[
            ['state', 'absent', ['relay_policy', 'tenant']],
            ['state', 'present', ['relay_policy', 'tenant']],
            ['epg_type', 'epg', ['anp', 'epg']],
            ['epg_type', 'l2_external', ['l2out_name', 'external_epg']],
            ['epg_type', 'l3_external', ['l3out_name', 'external_epg']],
            ['epg_type', 'dn', ['dn']],
        ],
        mutually_exclusive=[
            ['anp', 'l2out_name'],
            ['anp', 'l3out_name'],
            ['anp', 'external_epg'],
            ['anp', 'dn'],
            ['epg', 'l2out_name'],
            ['epg', 'l3out_name'],
            ['epg', 'external_epg'],
            ['epg', 'dn'],
            ['l2out_name', 'l3out_name'],
            ['l2out_name', 'dn'],
            ['l3out_name', 'dn'],
            ['external_epg', 'dn'],
        ],
    )

    relay_policy = module.params.get('relay_policy')
    state = module.params.get('state')
    tenant = module.params.get('tenant')
    epg_type = module.params.get('epg_type')
    anp = module.params.get('anp')
    epg = module.params.get('epg')
    l2out_name = module.params.get('l2out_name')
    l3out_name = module.params.get('l3out_name')
    external_epg = module.params.get('external_epg')
    dhcp_server_addr = module.params.get('dhcp_server_addr')
    provider_tenant = module.params.get('provider_tenant')
    dn = module.params.get('dn')

    if provider_tenant is None:
        provider_tenant = tenant

    if epg_type == 'epg':
        tdn = 'uni/tn-{0}/ap-{1}/epg-{2}'.format(provider_tenant, anp, epg)
    elif epg_type == 'l2_external':
        tdn = ('uni/tn-{0}/l2out-{1}/instP-{2}'
               .format(provider_tenant, l2out_name, external_epg))
    elif epg_type == 'l3_external':
        tdn = ('uni/tn-{0}/out-{1}/instP-{2}'
               .format(provider_tenant, l3out_name, external_epg))
    elif epg_type == 'dn':
        tdn = dn

    aci = ACIModule(module)
    aci.construct_url(
        root_class=dict(
            aci_class='fvTenant',
            aci_rn='tn-{0}'.format(tenant),
            module_object=tenant,
            target_filter={'name': tenant},
        ),
        subclass_1=dict(
            aci_class='dhcpRelayP',
            aci_rn='relayp-{0}'.format(relay_policy),
            module_object=relay_policy,
            target_filter={'name': relay_policy},
        ),
        subclass_2=dict(
            aci_class='dhcpRsProv',
            aci_rn='rsprov-[{0}]'.format(tdn),
            module_object=tdn,
            target_filter={'tDn': tdn},
        ),
    )

    aci.get_existing()

    if state == 'present':
        aci.payload(
            aci_class='dhcpRsProv',
            class_config=dict(
                addr=dhcp_server_addr,
                tDn=tdn
            ),
        )

        aci.get_diff(aci_class='dhcpRsProv')

        aci.post_config()

    elif state == 'absent':
        aci.delete_config()

    aci.exit_json()


if __name__ == "__main__":
    main()