# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Digital Ocean DNS Driver
"""

__all__ = [
    'DigitalOceanDNSDriver'
]

import json

from libcloud.utils.py3 import httplib

from libcloud.common.digitalocean import DigitalOcean_v2_BaseDriver
from libcloud.common.digitalocean import DigitalOcean_v2_Connection
from libcloud.dns.types import Provider, RecordType
from libcloud.dns.base import DNSDriver, Zone, Record


class DigitalOceanDNSDriver(DigitalOcean_v2_BaseDriver, DNSDriver):
    connectionCls = DigitalOcean_v2_Connection
    type = Provider.DIGITAL_OCEAN
    name = "DigitalOcean"
    website = 'https://www.digitalocean.com'

    RECORD_TYPE_MAP = {
        RecordType.NS: 'NS',
        RecordType.A: 'A',
        RecordType.AAAA: 'AAAA',
        RecordType.CNAME: 'CNAME',
        RecordType.MX: 'MX',
        RecordType.TXT: 'TXT',
        RecordType.SRV: 'SRV',
    }

    def list_zones(self):
        """
        Return a list of zones.

        :return: ``list`` of :class:`Zone`
        """
        data = self._paginated_request('/v2/domains', 'domains')
        return list(map(self._to_zone, data))

    def list_records(self, zone):
        """
        Return a list of records for the provided zone.

        :param zone: Zone to list records for.
        :type zone: :class:`Zone`

        :return: ``list`` of :class:`Record`
        """
        data = self._paginated_request('/v2/domains/%s/records' % (zone.id),
                                       'domain_records')
# TODO: Not use list comprehension to add zone to record for proper data map
#       functionality? This passes a reference to zone for each data currently
#       to _to_record which returns a Record. map() does not take keywords
        return list(map(self._to_record, data, [zone for z in data]))

    def get_zone(self, zone_id):
        """
        Return a Zone instance.

        :param zone_id: ID of the required zone
        :type  zone_id: ``str``

        :rtype: :class:`Zone`
        """
        data = self.connection.request('/v2/domains/%s' %
                                       (zone_id)).object['domain']

        return self._to_zone(data)

    def get_record(self, zone_id, record_id):
        """
        Return a Record instance.

        :param zone_id: ID of the required zone
        :type  zone_id: ``str``

        :param record_id: ID of the required record
        :type  record_id: ``str``

        :rtype: :class:`Record`
        """
        data = self.connection.request('/v2/domains/%s/records/%s' % (zone_id,
                                       record_id)).object['domain_record']

# TODO: Any way of not using get_zone which polls the API again
#       without breaking the DNSDriver.get_record parameters?
        return self._to_record(data, self.get_zone(zone_id))

    def create_zone(self, domain, type='master', ttl=None, extra=None):
        """
        Create a new zone.

        :param domain: Zone domain name (e.g. example.com)
        :type domain: ``str``

        :param type: Zone type (master / slave) (does nothing).
        :type  type: ``str``

        :param ttl: TTL for new records. (does nothing)
        :type  ttl: ``int``

        :param extra: Extra attributes (to set ip). (optional)
                      Note: This can be used to set the default A record with
                      {"ip" : "IP.AD.DR.ESS"} otherwise 127.0.0.1 is used
        :type extra: ``dict``

        :rtype: :class:`Zone`
        """
        params = {'name': domain}
        try:
            params['ip_address'] = extra['ip']
        except Exception:
            params['ip_address'] = '127.0.0.1'

        res = self.connection.request('/v2/domains', data=json.dumps(params),
                                      method='POST')

        return Zone(id=res.object['domain']['name'],
                    domain=res.object['domain']['name'],
                    type='master', ttl=1800, driver=self, extra={})

    def create_record(self, name, zone, type, data, extra=None):
        """
        Create a new record.

        :param name: Record name without the domain name (e.g. www).
                     Note: If you want to create a record for a base domain
                     name, you should specify empty string ('') for this
                     argument.
        :type  name: ``str``

        :param zone: Zone where the requested record is created.
        :type  zone: :class:`Zone`

        :param type: DNS record type (A, AAAA, ...).
        :type  type: :class:`RecordType`

        :param data: Data for the record (depends on the record type).
        :type  data: ``str``

        :param extra: Extra attributes for MX and SRV. (Depends on record)
                      {"priority" : 0, "port" : 443, "weight" : 100}
        :type extra: ``dict``

        :rtype: :class:`Record`
        """
        params = {
            "type": self.RECORD_TYPE_MAP[type],
            "name": name,
            "data": data
        }
        if extra:
            try:
                params['priority'] = extra['priority']
            except KeyError:
                params['priority'] = 'null'
            try:
                params['port'] = extra['port']
            except KeyError:
                params['port'] = 'null'
            try:
                params['weight'] = extra['weight']
            except KeyError:
                params['weight'] = 'null'

            if 'ttl' in extra:
                params['ttl'] = extra['ttl']

        res = self.connection.request('/v2/domains/%s/records' % zone.id,
                                      data=json.dumps(params),
                                      method='POST')

        return Record(id=res.object['domain_record']['id'],
                      name=res.object['domain_record']['name'],
                      type=type, data=data, zone=zone,
                      ttl=res.object['domain_record'].get('ttl', None),
                      driver=self, extra=extra)

    def update_record(self, record, name=None, type=None,
                      data=None, extra=None):
        """
        Update an existing record.

        :param record: Record to update.
        :type  record: :class:`Record`

        :param name: Record name without the domain name (e.g. www). (Ignored)
                     Note: The value is pulled from the record being updated
        :type  name: ``str``

        :param type: DNS record type (A, AAAA, ...). (Ignored)
                     Note: Updating records does not support changing type
                     so this value is ignored
        :type  type: :class:`RecordType`

        :param data: Data for the record (depends on the record type).
        :type  data: ``str``

        :param extra: (optional) Extra attributes (driver specific).
        :type  extra: ``dict``

        :rtype: :class:`Record`
        """
        params = {
            "type": record.type,
            "name": record.name,
            "data": data
        }
        if data is None:
            params['data'] = record.data
        if extra:
            try:
                params['priority'] = extra['priority']
            except KeyError:
                params['priority'] = 'null'
            try:
                params['port'] = extra['port']
            except KeyError:
                params['port'] = 'null'
            try:
                params['weight'] = extra['weight']
            except KeyError:
                params['weight'] = 'null'

            if 'ttl' in extra:
                params['ttl'] = extra['ttl']

        res = self.connection.request('/v2/domains/%s/records/%s' %
                                      (record.zone.id, record.id),
                                      data=json.dumps(params),
                                      method='PUT')

        return Record(id=res.object['domain_record']['id'],
                      name=res.object['domain_record']['name'],
                      type=record.type, data=data, zone=record.zone,
                      ttl=res.object['domain_record'].get('ttl', None),
                      driver=self, extra=extra)

    def delete_zone(self, zone):
        """
        Delete a zone.

        Note: This will delete all the records belonging to this zone.

        :param zone: Zone to delete.
        :type  zone: :class:`Zone`

        :rtype: ``bool``
        """
        params = {}

        res = self.connection.request('/v2/domains/%s' % zone.id,
                                      params=params, method='DELETE')

        return res.status == httplib.NO_CONTENT

    def delete_record(self, record):
        """
        Delete a record.

        :param record: Record to delete.
        :type  record: :class:`Record`

        :rtype: ``bool``
        """
        params = {}

        res = self.connection.request('/v2/domains/%s/records/%s' % (
                                      record.zone.id, record.id),
                                      params=params,
                                      method='DELETE')
        return res.status == httplib.NO_CONTENT

    def _to_record(self, data, zone=None):
        extra = {'port': data['port'], 'priority': data['priority'],
                 'weight': data['weight']}
        return Record(id=data['id'], name=data['name'],
                      type=self._string_to_record_type(data['type']),
                      data=data['data'], zone=zone, ttl=data.get('ttl', None),
                      driver=self, extra=extra)

    def _to_zone(self, data):
        extra = {'zone_file': data['zone_file']}
        return Zone(id=data['name'], domain=data['name'], type='master',
                    ttl=data['ttl'], driver=self, extra=extra)
