# Copyright 2010 New Relic, Inc.
#
# Licensed 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.

from elasticsearch import Elasticsearch
import elasticsearch.client

from newrelic.api.background_task import background_task

from testing_support.fixtures import (validate_transaction_metrics,
    validate_transaction_errors, override_application_settings)
from testing_support.db_settings import elasticsearch_settings
from testing_support.util import instance_hostname

ES_SETTINGS = elasticsearch_settings()[0]
ES_URL = 'http://%s:%s' % (ES_SETTINGS['host'], ES_SETTINGS['port'])

# Settings

_enable_instance_settings = {
    'datastore_tracer.instance_reporting.enabled': True,
}
_disable_instance_settings = {
    'datastore_tracer.instance_reporting.enabled': False,
}

# Metrics

_base_scoped_metrics = [
    ('Datastore/statement/Elasticsearch/_all/cluster.health', 1),
    ('Datastore/statement/Elasticsearch/_all/search', 2),
    ('Datastore/statement/Elasticsearch/address/index', 2),
    ('Datastore/statement/Elasticsearch/address/search', 1),
    ('Datastore/statement/Elasticsearch/contacts/index', 3),
    ('Datastore/statement/Elasticsearch/contacts/indices.refresh', 1),
    ('Datastore/statement/Elasticsearch/contacts/search', 2),
    ('Datastore/statement/Elasticsearch/other/search', 2),
]

_base_rollup_metrics = [
    ('Datastore/operation/Elasticsearch/cluster.health', 1),
    ('Datastore/operation/Elasticsearch/index', 5),
    ('Datastore/operation/Elasticsearch/indices.refresh', 1),
    ('Datastore/operation/Elasticsearch/search', 7),
    ('Datastore/statement/Elasticsearch/_all/cluster.health', 1),
    ('Datastore/statement/Elasticsearch/_all/search', 2),
    ('Datastore/statement/Elasticsearch/address/index', 2),
    ('Datastore/statement/Elasticsearch/address/search', 1),
    ('Datastore/statement/Elasticsearch/contacts/index', 3),
    ('Datastore/statement/Elasticsearch/contacts/indices.refresh', 1),
    ('Datastore/statement/Elasticsearch/contacts/search', 2),
    ('Datastore/statement/Elasticsearch/other/search', 2),
]

# Version support

_all_count = 14

try:
    import elasticsearch.client.cat
    _base_scoped_metrics.append(
            ('Datastore/operation/Elasticsearch/cat.health', 1))
    _base_rollup_metrics.append(
            ('Datastore/operation/Elasticsearch/cat.health', 1))
    _all_count += 1
except ImportError:
    _base_scoped_metrics.append(
            ('Datastore/operation/Elasticsearch/cat.health', None))
    _base_rollup_metrics.append(
            ('Datastore/operation/Elasticsearch/cat.health', None))

try:
    import elasticsearch.client.nodes
    _base_scoped_metrics.append(
            ('Datastore/operation/Elasticsearch/nodes.info', 1))
    _base_rollup_metrics.append(
            ('Datastore/operation/Elasticsearch/nodes.info', 1))
    _all_count += 1
except ImportError:
    _base_scoped_metrics.append(
            ('Datastore/operation/Elasticsearch/nodes.info', None))
    _base_rollup_metrics.append(
            ('Datastore/operation/Elasticsearch/nodes.info', None))

if (hasattr(elasticsearch.client, 'SnapshotClient') and
        hasattr(elasticsearch.client.SnapshotClient, 'status')):
    _base_scoped_metrics.append(
            ('Datastore/operation/Elasticsearch/snapshot.status', 1))
    _base_rollup_metrics.append(
            ('Datastore/operation/Elasticsearch/snapshot.status', 1))
    _all_count += 1
else:
    _base_scoped_metrics.append(
            ('Datastore/operation/Elasticsearch/snapshot.status', None))
    _base_rollup_metrics.append(
            ('Datastore/operation/Elasticsearch/snapshot.status', None))

if hasattr(elasticsearch.client.IndicesClient, 'status'):
    _base_scoped_metrics.append(
        ('Datastore/statement/Elasticsearch/_all/indices.status', 1))
    _base_rollup_metrics.extend([
        ('Datastore/operation/Elasticsearch/indices.status', 1),
        ('Datastore/statement/Elasticsearch/_all/indices.status', 1),
    ])
    _all_count += 1
else:
    _base_scoped_metrics.append(
        ('Datastore/operation/Elasticsearch/indices.status', None))
    _base_rollup_metrics.extend([
        ('Datastore/operation/Elasticsearch/indices.status', None),
        ('Datastore/statement/Elasticsearch/_all/indices.status', None),
    ])

_base_rollup_metrics.extend([
    ('Datastore/all', _all_count),
    ('Datastore/allOther', _all_count),
    ('Datastore/Elasticsearch/all', _all_count),
    ('Datastore/Elasticsearch/allOther', _all_count),
])

# Instance info

_disable_scoped_metrics = list(_base_scoped_metrics)
_disable_rollup_metrics = list(_base_rollup_metrics)

_enable_scoped_metrics = list(_base_scoped_metrics)
_enable_rollup_metrics = list(_base_rollup_metrics)

_host = instance_hostname(ES_SETTINGS['host'])
_port = ES_SETTINGS['port']

_instance_metric_name = 'Datastore/instance/Elasticsearch/%s/%s' % (
        _host, _port)

_enable_rollup_metrics.append(
        (_instance_metric_name, _all_count)
)

_disable_rollup_metrics.append(
        (_instance_metric_name, None)
)

# Query

def _exercise_es(es):
    es.index(index="contacts", doc_type="person",
            body={"name": "Joe Tester", "age": 25, "title": "QA Engineer"}, id=1)
    es.index(index="contacts", doc_type="person",
            body={"name": "Jessica Coder", "age": 32, "title": "Programmer"}, id=2)
    es.index(index="contacts", doc_type="person",
            body={"name": "Freddy Tester", "age": 29, "title": "Assistant"}, id=3)
    es.indices.refresh('contacts')
    es.index(index="address", doc_type="employee", body={"name": "Sherlock",
        "address": "221B Baker Street, London"}, id=1)
    es.index(index="address", doc_type="employee", body={"name": "Bilbo",
        "address": "Bag End, Bagshot row, Hobbiton, Shire"}, id=2)
    es.search(index='contacts', q='name:Joe')
    es.search(index='contacts', q='name:jessica')
    es.search(index='address', q='name:Sherlock')
    es.search(index=['contacts', 'address'], q='name:Bilbo')
    es.search(index='contacts,address', q='name:Bilbo')
    es.search(index='*', q='name:Bilbo')
    es.search(q='name:Bilbo')
    es.cluster.health()

    if hasattr(es, 'cat'):
        es.cat.health()
    if hasattr(es, 'nodes'):
        es.nodes.info()
    if hasattr(es, 'snapshot') and hasattr(es.snapshot, 'status'):
        es.snapshot.status()
    if hasattr(es.indices, 'status'):
        es.indices.status()

# Test

@validate_transaction_errors(errors=[])
@validate_transaction_metrics(
        'test_elasticsearch:test_elasticsearch_operation_disabled',
        scoped_metrics=_disable_scoped_metrics,
        rollup_metrics=_disable_rollup_metrics,
        background_task=True)
@override_application_settings(_disable_instance_settings)
@background_task()
def test_elasticsearch_operation_disabled():
    client = Elasticsearch(ES_URL)
    _exercise_es(client)

@validate_transaction_errors(errors=[])
@validate_transaction_metrics(
        'test_elasticsearch:test_elasticsearch_operation_enabled',
        scoped_metrics=_enable_scoped_metrics,
        rollup_metrics=_enable_rollup_metrics,
        background_task=True)
@override_application_settings(_enable_instance_settings)
@background_task()
def test_elasticsearch_operation_enabled():
    client = Elasticsearch(ES_URL)
    _exercise_es(client)
