#!/usr/bin/python
# Copyright (c) 2016 Hewlett-Packard Enterprise
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

DOCUMENTATION = '''
---
module: recordset
short_description: Manage OpenStack DNS recordsets
author: OpenStack Ansible SIG
description:
    - Manage OpenStack DNS recordsets. Recordsets can be created, deleted or
      updated. Only the I(records), I(description), and I(ttl) values
      can be updated.
options:
   zone:
     description:
        - Zone managing the recordset
     required: true
     type: str
   name:
     description:
        - Name of the recordset. It must be ended with name of dns zone.
     required: true
     type: str
   recordset_type:
     description:
        - Recordset type
        - Required when I(state=present).
     choices: ['a', 'aaaa', 'mx', 'cname', 'txt', 'ns', 'srv', 'ptr', 'caa']
     type: str
   records:
     description:
        - List of recordset definitions.
        - Required when I(state=present).
     type: list
     elements: str
   description:
     description:
        - Description of the recordset
     type: str
   ttl:
     description:
        -  TTL (Time To Live) value in seconds
     type: int
   state:
     description:
       - Should the resource be present or absent.
     choices: [present, absent]
     default: present
     type: str
requirements:
    - "python >= 3.6"
    - "openstacksdk"

extends_documentation_fragment:
- openstack.cloud.openstack
'''

EXAMPLES = '''
# Create a recordset named "www.example.net."
- openstack.cloud.recordset:
    cloud: mycloud
    state: present
    zone: example.net.
    name: www.example.net.
    recordset_type: "a"
    records: ['10.1.1.1']
    description: test recordset
    ttl: 3600

# Update the TTL on existing "www.example.net." recordset
- openstack.cloud.recordset:
    cloud: mycloud
    state: present
    zone: example.net.
    name: www.example.net.
    recordset_type: "a"
    records: ['10.1.1.1']
    ttl: 7200

# Delete recordset named "www.example.net."
- openstack.cloud.recordset:
    cloud: mycloud
    state: absent
    zone: example.net.
    name: www.example.net.
'''

RETURN = '''
recordset:
    description: Dictionary describing the recordset.
    returned: On success when I(state) is 'present'.
    type: complex
    contains:
        id:
            description: Unique recordset ID
            type: str
            sample: "c1c530a3-3619-46f3-b0f6-236927b2618c"
        name:
            description: Recordset name
            type: str
            sample: "www.example.net."
        zone_id:
            description: Zone id
            type: str
            sample: 9508e177-41d8-434e-962c-6fe6ca880af7
        type:
            description: Recordset type
            type: str
            sample: "A"
        description:
            description: Recordset description
            type: str
            sample: "Test description"
        ttl:
            description: Zone TTL value
            type: int
            sample: 3600
        records:
            description: Recordset records
            type: list
            sample: ['10.0.0.1']
'''

from ansible_collections.openstack.cloud.plugins.module_utils.openstack import OpenStackModule


class DnsRecordsetModule(OpenStackModule):
    argument_spec = dict(
        zone=dict(required=True),
        name=dict(required=True),
        recordset_type=dict(required=False, choices=['a', 'aaaa', 'mx', 'cname', 'txt', 'ns', 'srv', 'ptr', 'caa']),
        records=dict(required=False, type='list', elements='str'),
        description=dict(required=False, default=None),
        ttl=dict(required=False, type='int'),
        state=dict(default='present', choices=['absent', 'present']),
    )

    module_kwargs = dict(
        required_if=[
            ('state', 'present',
             ['recordset_type', 'records'])],
        supports_check_mode=True
    )

    module_min_sdk_version = '0.28.0'

    def _system_state_change(self, state, records, description, ttl, recordset):
        if state == 'present':
            if recordset is None:
                return True
            if records is not None and recordset['records'] != records:
                return True
            if description is not None and recordset['description'] != description:
                return True
            if ttl is not None and recordset['ttl'] != ttl:
                return True
        if state == 'absent' and recordset:
            return True
        return False

    def run(self):
        zone = self.params.get('zone')
        name = self.params.get('name')
        state = self.params.get('state')

        recordsets = self.conn.search_recordsets(zone, name_or_id=name)

        if recordsets:
            recordset = recordsets[0]
            try:
                recordset_id = recordset['id']
            except KeyError as e:
                self.fail_json(msg=str(e))
        else:
            # recordsets is filtered by type and should never be more than 1 return
            recordset = None

        if state == 'present':
            recordset_type = self.params.get('recordset_type').upper()
            records = self.params.get('records')
            description = self.params.get('description')
            ttl = self.params.get('ttl')

            kwargs = {}
            if description:
                kwargs['description'] = description
            kwargs['records'] = records

            if self.ansible.check_mode:
                self.exit_json(
                    changed=self._system_state_change(
                        state, records, description, ttl, recordset))

            if recordset is None:
                if ttl:
                    kwargs['ttl'] = ttl
                else:
                    kwargs['ttl'] = 300

                recordset = self.conn.create_recordset(
                    zone=zone, name=name, recordset_type=recordset_type,
                    **kwargs)
                changed = True
            else:

                if ttl:
                    kwargs['ttl'] = ttl

                pre_update_recordset = recordset
                changed = self._system_state_change(
                    state, records, description, ttl, pre_update_recordset)
                if changed:
                    recordset = self.conn.update_recordset(
                        zone=zone, name_or_id=recordset_id, **kwargs)

            self.exit_json(changed=changed, recordset=recordset)

        elif state == 'absent':
            if self.ansible.check_mode:
                self.exit_json(changed=self._system_state_change(
                    state, None, None, None, recordset))

            if recordset is None:
                changed = False
            else:
                self.conn.delete_recordset(zone, recordset_id)
                changed = True
            self.exit_json(changed=changed)


def main():
    module = DnsRecordsetModule()
    module()


if __name__ == '__main__':
    main()