# -*- coding: utf-8 -*-
'''
Azure (ARM) DNS Execution Module

.. versionadded:: 3000

:maintainer: <devops@eitr.tech>
:maturity: new
:depends:
    * `azure <https://pypi.python.org/pypi/azure>`_ >= 2.0.0
    * `azure-common <https://pypi.python.org/pypi/azure-common>`_ >= 1.1.8
    * `azure-mgmt <https://pypi.python.org/pypi/azure-mgmt>`_ >= 1.0.0
    * `azure-mgmt-compute <https://pypi.python.org/pypi/azure-mgmt-compute>`_ >= 1.0.0
    * `azure-mgmt-dns <https://pypi.python.org/pypi/azure-mgmt-dns>`_ >= 2.0.0rc1
    * `azure-mgmt-network <https://pypi.python.org/pypi/azure-mgmt-network>`_ >= 1.7.1
    * `azure-mgmt-resource <https://pypi.python.org/pypi/azure-mgmt-resource>`_ >= 1.1.0
    * `azure-mgmt-storage <https://pypi.python.org/pypi/azure-mgmt-storage>`_ >= 1.0.0
    * `azure-mgmt-web <https://pypi.python.org/pypi/azure-mgmt-web>`_ >= 0.32.0
    * `azure-storage <https://pypi.python.org/pypi/azure-storage>`_ >= 0.34.3
    * `msrestazure <https://pypi.python.org/pypi/msrestazure>`_ >= 0.4.21
:platform: linux

:configuration: This module requires Azure Resource Manager credentials to be passed as keyword arguments
to every function in order to work properly.

    Required provider parameters:

    if using username and password:
      * ``subscription_id``
      * ``username``
      * ``password``

    if using a service principal:
      * ``subscription_id``
      * ``tenant``
      * ``client_id``
      * ``secret``

    Optional provider parameters:

    **cloud_environment**: Used to point the cloud driver to different API endpoints, such as Azure GovCloud.
    Possible values:
      * ``AZURE_PUBLIC_CLOUD`` (default)
      * ``AZURE_CHINA_CLOUD``
      * ``AZURE_US_GOV_CLOUD``
      * ``AZURE_GERMAN_CLOUD``

'''

# Python libs
from __future__ import absolute_import
import logging

# Azure libs
HAS_LIBS = False
try:
    import azure.mgmt.dns.models  # pylint: disable=unused-import
    from msrest.exceptions import SerializationError
    from msrestazure.azure_exceptions import CloudError
    HAS_LIBS = True
except ImportError:
    pass

__virtualname__ = 'azurearm_dns'

log = logging.getLogger(__name__)


def __virtual__():
    if not HAS_LIBS:
        return (
            False,
            'The following dependencies are required to use the AzureARM modules: '
            'Microsoft Azure SDK for Python >= 2.0rc6, '
            'MS REST Azure (msrestazure) >= 0.4'
        )

    return __virtualname__


def record_set_create_or_update(name, zone_name, resource_group, record_type, **kwargs):
    '''
    .. versionadded:: 3000

    Creates or updates a record set within a DNS zone.

    :param name: The name of the record set, relative to the name of the zone.

    :param zone_name: The name of the DNS zone (without a terminating dot).

    :param resource_group: The name of the resource group.

    :param record_type: The type of DNS record in this record set. Record sets of type SOA can be
    updated but not created (they are created when the DNS zone is created).
    Possible values include: 'A', 'AAAA', 'CAA', 'CNAME', 'MX', 'NS', 'PTR', 'SOA', 'SRV', 'TXT'

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.record_set_create_or_update myhost myzone testgroup A
            arecords='[{ipv4_address: 10.0.0.1}]' ttl=300

    '''
    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)

    try:
        record_set_model = __utils__['azurearm.create_object_model']('dns', 'RecordSet', **kwargs)
    except TypeError as exc:
        result = {'error': 'The object model could not be built. ({0})'.format(str(exc))}
        return result

    try:
        record_set = dnsconn.record_sets.create_or_update(
            relative_record_set_name=name,
            zone_name=zone_name,
            resource_group_name=resource_group,
            record_type=record_type,
            parameters=record_set_model,
            if_match=kwargs.get('if_match'),
            if_none_match=kwargs.get('if_none_match')
        )
        result = record_set.as_dict()
    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)
        result = {'error': str(exc)}
    except SerializationError as exc:
        result = {'error': 'The object model could not be parsed. ({0})'.format(str(exc))}

    return result


def record_set_delete(name, zone_name, resource_group, record_type, **kwargs):
    '''
    .. versionadded:: 3000

    Deletes a record set from a DNS zone. This operation cannot be undone.

    :param name: The name of the record set, relative to the name of the zone.

    :param zone_name: The name of the DNS zone (without a terminating dot).

    :param resource_group: The name of the resource group.

    :param record_type: The type of DNS record in this record set. Record sets of type SOA cannot be
    deleted (they are deleted when the DNS zone is deleted).
    Possible values include: 'A', 'AAAA', 'CAA', 'CNAME', 'MX', 'NS', 'PTR', 'SOA', 'SRV', 'TXT'

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.record_set_delete myhost myzone testgroup A

    '''
    result = False
    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)
    try:
        record_set = dnsconn.record_sets.delete(
            relative_record_set_name=name,
            zone_name=zone_name,
            resource_group_name=resource_group,
            record_type=record_type,
            if_match=kwargs.get('if_match')
        )
        result = True
    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)

    return result


def record_set_get(name, zone_name, resource_group, record_type, **kwargs):
    '''
    .. versionadded:: 3000

    Get a dictionary representing a record set's properties.

    :param name: The name of the record set, relative to the name of the zone.

    :param zone_name: The name of the DNS zone (without a terminating dot).

    :param resource_group: The name of the resource group.

    :param record_type: The type of DNS record in this record set.
    Possible values include: 'A', 'AAAA', 'CAA', 'CNAME', 'MX', 'NS', 'PTR', 'SOA', 'SRV', 'TXT'

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.record_set_get '@' myzone testgroup SOA

    '''
    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)
    try:
        record_set = dnsconn.record_sets.get(
            relative_record_set_name=name,
            zone_name=zone_name,
            resource_group_name=resource_group,
            record_type=record_type
        )
        result = record_set.as_dict()

    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)
        result = {'error': str(exc)}

    return result


def record_sets_list_by_type(zone_name, resource_group, record_type, top=None, recordsetnamesuffix=None, **kwargs):
    '''
    .. versionadded:: 3000

    Lists the record sets of a specified type in a DNS zone.

    :param zone_name: The name of the DNS zone (without a terminating dot).

    :param resource_group: The name of the resource group.

    :param record_type: The type of record sets to enumerate.
    Possible values include: 'A', 'AAAA', 'CAA', 'CNAME', 'MX', 'NS', 'PTR', 'SOA', 'SRV', 'TXT'

    :param top: The maximum number of record sets to return. If not specified,
    returns up to 100 record sets.

    :param recordsetnamesuffix: The suffix label of the record set name that has
    to be used to filter the record set enumerations.

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.record_sets_list_by_type myzone testgroup SOA

    '''
    result = {}
    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)
    try:
        record_sets = __utils__['azurearm.paged_object_to_list'](
            dnsconn.record_sets.list_by_type(
                zone_name=zone_name,
                resource_group_name=resource_group,
                record_type=record_type,
                top=top,
                recordsetnamesuffix=recordsetnamesuffix
            )
        )

        for record_set in record_sets:
            result[record_set['name']] = record_set
    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)
        result = {'error': str(exc)}

    return result


def record_sets_list_by_dns_zone(zone_name, resource_group, top=None, recordsetnamesuffix=None, **kwargs):
    '''
    .. versionadded:: 3000

    Lists all record sets in a DNS zone.

    :param zone_name: The name of the DNS zone (without a terminating dot).

    :param resource_group: The name of the resource group.

    :param top: The maximum number of record sets to return. If not specified,
    returns up to 100 record sets.

    :param recordsetnamesuffix: The suffix label of the record set name that has
    to be used to filter the record set enumerations.

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.record_sets_list_by_dns_zone myzone testgroup

    '''
    result = {}
    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)
    try:
        record_sets = __utils__['azurearm.paged_object_to_list'](
            dnsconn.record_sets.list_by_dns_zone(
                zone_name=zone_name,
                resource_group_name=resource_group,
                top=top,
                recordsetnamesuffix=recordsetnamesuffix
            )
        )

        for record_set in record_sets:
            result[record_set['name']] = record_set
    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)
        result = {'error': str(exc)}

    return result


def zone_create_or_update(name, resource_group, **kwargs):
    '''
    .. versionadded:: 3000

    Creates or updates a DNS zone. Does not modify DNS records within the zone.

    :param name: The name of the DNS zone to create (without a terminating dot).

    :param resource_group: The name of the resource group.

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.zone_create_or_update myzone testgroup

    '''
    # DNS zones are global objects
    kwargs['location'] = 'global'

    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)

    # Convert list of ID strings to list of dictionaries with id key.
    if isinstance(kwargs.get('registration_virtual_networks'), list):
        kwargs['registration_virtual_networks'] = [{'id': vnet} for vnet in kwargs['registration_virtual_networks']]

    if isinstance(kwargs.get('resolution_virtual_networks'), list):
        kwargs['resolution_virtual_networks'] = [{'id': vnet} for vnet in kwargs['resolution_virtual_networks']]

    try:
        zone_model = __utils__['azurearm.create_object_model']('dns', 'Zone', **kwargs)
    except TypeError as exc:
        result = {'error': 'The object model could not be built. ({0})'.format(str(exc))}
        return result

    try:
        zone = dnsconn.zones.create_or_update(
            zone_name=name,
            resource_group_name=resource_group,
            parameters=zone_model,
            if_match=kwargs.get('if_match'),
            if_none_match=kwargs.get('if_none_match')
        )
        result = zone.as_dict()
    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)
        result = {'error': str(exc)}
    except SerializationError as exc:
        result = {'error': 'The object model could not be parsed. ({0})'.format(str(exc))}

    return result


def zone_delete(name, resource_group, **kwargs):
    '''
    .. versionadded:: 3000

    Delete a DNS zone within a resource group.

    :param name: The name of the DNS zone to delete.

    :param resource_group: The name of the resource group.

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.zone_delete myzone testgroup

    '''
    result = False
    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)
    try:
        zone = dnsconn.zones.delete(
            zone_name=name,
            resource_group_name=resource_group,
            if_match=kwargs.get('if_match')
        )
        zone.wait()
        result = True
    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)

    return result


def zone_get(name, resource_group, **kwargs):
    '''
    .. versionadded:: 3000

    Get a dictionary representing a DNS zone's properties, but not the
    record sets within the zone.

    :param name: The DNS zone to get.

    :param resource_group: The name of the resource group.

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.zone_get myzone testgroup

    '''
    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)
    try:
        zone = dnsconn.zones.get(
            zone_name=name,
            resource_group_name=resource_group
        )
        result = zone.as_dict()

    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)
        result = {'error': str(exc)}

    return result


def zones_list_by_resource_group(resource_group, top=None, **kwargs):
    '''
    .. versionadded:: 3000

    Lists the DNS zones in a resource group.

    :param resource_group: The name of the resource group.

    :param top: The maximum number of DNS zones to return. If not specified,
    returns up to 100 zones.

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.zones_list_by_resource_group testgroup

    '''
    result = {}
    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)
    try:
        zones = __utils__['azurearm.paged_object_to_list'](
            dnsconn.zones.list_by_resource_group(
                resource_group_name=resource_group,
                top=top
            )
        )

        for zone in zones:
            result[zone['name']] = zone
    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)
        result = {'error': str(exc)}

    return result


def zones_list(top=None, **kwargs):
    '''
    .. versionadded:: 3000

    Lists the DNS zones in all resource groups in a subscription.

    :param top: The maximum number of DNS zones to return. If not specified,
    returns up to 100 zones.

    CLI Example:

    .. code-block:: bash

        salt-call azurearm_dns.zones_list

    '''
    result = {}
    dnsconn = __utils__['azurearm.get_client']('dns', **kwargs)
    try:
        zones = __utils__['azurearm.paged_object_to_list'](dnsconn.zones.list(top=top))

        for zone in zones:
            result[zone['name']] = zone
    except CloudError as exc:
        __utils__['azurearm.log_cloud_error']('dns', str(exc), **kwargs)
        result = {'error': str(exc)}

    return result
