# -*- coding: utf-8 -*-
#
# 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.

import unittest
import logging.config
import os
import copy
from datetime import datetime

from airflow import models, configuration, settings
from airflow.models import DAG, TaskInstance
from airflow.settings import Session
from airflow.www import app as application
from airflow.operators.dummy_operator import DummyOperator
from airflow.config_templates.default_airflow_logging import DEFAULT_LOGGING_CONFIG


class TestChartModelView(unittest.TestCase):

    CREATE_ENDPOINT = '/admin/chart/new/?url=/admin/chart/'

    @classmethod
    def setUpClass(cls):
        super(TestChartModelView, cls).setUpClass()
        session = Session()
        session.query(models.Chart).delete()
        session.query(models.User).delete()
        session.commit()
        user = models.User(username='airflow')
        session.add(user)
        session.commit()
        session.close()

    def setUp(self):
        super(TestChartModelView, self).setUp()
        configuration.load_test_config()
        app = application.create_app(testing=True)
        app.config['WTF_CSRF_METHODS'] = []
        self.app = app.test_client()
        self.session = Session()
        self.chart = {
            'label': 'chart',
            'owner': 'airflow',
            'conn_id': 'airflow_ci',
        }

    def tearDown(self):
        self.session.query(models.Chart).delete()
        self.session.commit()
        self.session.close()
        super(TestChartModelView, self).tearDown()

    @classmethod
    def tearDownClass(cls):
        session = Session()
        session.query(models.User).delete()
        session.commit()
        session.close()
        super(TestChartModelView, cls).tearDownClass()

    def test_create_chart(self):
        response = self.app.post(
            self.CREATE_ENDPOINT,
            data=self.chart,
            follow_redirects=True,
        )
        self.assertEqual(response.status_code, 200)
        self.assertEqual(self.session.query(models.Chart).count(), 1)

    def test_get_chart(self):
        response = self.app.get(
            '/admin/chart?sort=3',
            follow_redirects=True,
        )
        print(response.data)
        self.assertEqual(response.status_code, 200)
        self.assertIn('Sort by Owner', response.data.decode('utf-8'))


class TestVariableView(unittest.TestCase):

    CREATE_ENDPOINT = '/admin/variable/new/?url=/admin/variable/'

    @classmethod
    def setUpClass(cls):
        super(TestVariableView, cls).setUpClass()
        session = Session()
        session.query(models.Variable).delete()
        session.commit()
        session.close()

    def setUp(self):
        super(TestVariableView, self).setUp()
        configuration.load_test_config()
        app = application.create_app(testing=True)
        app.config['WTF_CSRF_METHODS'] = []
        self.app = app.test_client()
        self.session = Session()
        self.variable = {
            'key': 'test_key',
            'val': 'text_val',
            'is_encrypted': True
        }

    def tearDown(self):
        self.session.query(models.Variable).delete()
        self.session.commit()
        self.session.close()
        super(TestVariableView, self).tearDown()

    def test_can_handle_error_on_decrypt(self):
        # create valid variable
        response = self.app.post(
            self.CREATE_ENDPOINT,
            data=self.variable,
            follow_redirects=True,
        )
        self.assertEqual(response.status_code, 200)

        # update the variable with a wrong value, given that is encrypted
        Var = models.Variable
        (self.session.query(Var)
            .filter(Var.key == self.variable['key'])
            .update({
                'val': 'failed_value_not_encrypted'
            }, synchronize_session=False))
        self.session.commit()

        # retrieve Variables page, should not fail and contain the Invalid
        # label for the variable
        response = self.app.get('/admin/variable', follow_redirects=True)
        self.assertEqual(response.status_code, 200)
        self.assertEqual(self.session.query(models.Variable).count(), 1)
        self.assertIn('<span class="label label-danger">Invalid</span>',
                      response.data.decode('utf-8'))

    def test_xss_prevention(self):
        xss = "/admin/airflow/variables/asdf<img%20src=''%20onerror='alert(1);'>"

        response = self.app.get(
            xss,
            follow_redirects=True,
        )
        self.assertEqual(response.status_code, 404)
        self.assertNotIn("<img src='' onerror='alert(1);'>",
                         response.data.decode("utf-8"))


class TestKnownEventView(unittest.TestCase):

    CREATE_ENDPOINT = '/admin/knownevent/new/?url=/admin/knownevent/'

    @classmethod
    def setUpClass(cls):
        super(TestKnownEventView, cls).setUpClass()
        session = Session()
        session.query(models.KnownEvent).delete()
        session.query(models.User).delete()
        session.commit()
        user = models.User(username='airflow')
        session.add(user)
        session.commit()
        cls.user_id = user.id
        session.close()

    def setUp(self):
        super(TestKnownEventView, self).setUp()
        configuration.load_test_config()
        app = application.create_app(testing=True)
        app.config['WTF_CSRF_METHODS'] = []
        self.app = app.test_client()
        self.session = Session()
        self.known_event = {
            'label': 'event-label',
            'event_type': '1',
            'start_date': '2017-06-05 12:00:00',
            'end_date': '2017-06-05 13:00:00',
            'reported_by': self.user_id,
            'description': '',
        }

    def tearDown(self):
        self.session.query(models.KnownEvent).delete()
        self.session.commit()
        self.session.close()
        super(TestKnownEventView, self).tearDown()

    @classmethod
    def tearDownClass(cls):
        session = Session()
        session.query(models.User).delete()
        session.commit()
        session.close()
        super(TestKnownEventView, cls).tearDownClass()

    def test_create_known_event(self):
        response = self.app.post(
            self.CREATE_ENDPOINT,
            data=self.known_event,
            follow_redirects=True,
        )
        self.assertEqual(response.status_code, 200)
        self.assertEqual(self.session.query(models.KnownEvent).count(), 1)

    def test_create_known_event_with_end_data_earlier_than_start_date(self):
        self.known_event['end_date'] = '2017-06-05 11:00:00'
        response = self.app.post(
            self.CREATE_ENDPOINT,
            data=self.known_event,
            follow_redirects=True,
        )
        self.assertIn(
            'Field must be greater than or equal to Start Date.',
            response.data.decode('utf-8'),
        )
        self.assertEqual(self.session.query(models.KnownEvent).count(), 0)


class TestPoolModelView(unittest.TestCase):

    CREATE_ENDPOINT = '/admin/pool/new/?url=/admin/pool/'

    @classmethod
    def setUpClass(cls):
        super(TestPoolModelView, cls).setUpClass()
        session = Session()
        session.query(models.Pool).delete()
        session.commit()
        session.close()

    def setUp(self):
        super(TestPoolModelView, self).setUp()
        configuration.load_test_config()
        app = application.create_app(testing=True)
        app.config['WTF_CSRF_METHODS'] = []
        self.app = app.test_client()
        self.session = Session()
        self.pool = {
            'pool': 'test-pool',
            'slots': 777,
            'description': 'test-pool-description',
        }

    def tearDown(self):
        self.session.query(models.Pool).delete()
        self.session.commit()
        self.session.close()
        super(TestPoolModelView, self).tearDown()

    def test_create_pool(self):
        response = self.app.post(
            self.CREATE_ENDPOINT,
            data=self.pool,
            follow_redirects=True,
        )
        self.assertEqual(response.status_code, 200)
        self.assertEqual(self.session.query(models.Pool).count(), 1)

    def test_create_pool_with_same_name(self):
        # create test pool
        self.app.post(
            self.CREATE_ENDPOINT,
            data=self.pool,
            follow_redirects=True,
        )
        # create pool with the same name
        response = self.app.post(
            self.CREATE_ENDPOINT,
            data=self.pool,
            follow_redirects=True,
        )
        self.assertIn('Already exists.', response.data.decode('utf-8'))
        self.assertEqual(self.session.query(models.Pool).count(), 1)

    def test_create_pool_with_empty_name(self):
        self.pool['pool'] = ''
        response = self.app.post(
            self.CREATE_ENDPOINT,
            data=self.pool,
            follow_redirects=True,
        )
        self.assertIn('This field is required.', response.data.decode('utf-8'))
        self.assertEqual(self.session.query(models.Pool).count(), 0)


class TestLogView(unittest.TestCase):

    DAG_ID = 'dag_for_testing_log_view'
    TASK_ID = 'task_for_testing_log_view'
    DEFAULT_DATE = datetime(2017, 9, 1)
    ENDPOINT = '/admin/airflow/log?dag_id={dag_id}&task_id={task_id}&execution_date={execution_date}'.format(
        dag_id=DAG_ID,
        task_id=TASK_ID,
        execution_date=DEFAULT_DATE,
    )

    @classmethod
    def setUpClass(cls):
        super(TestLogView, cls).setUpClass()
        session = Session()
        session.query(TaskInstance).filter(
            TaskInstance.dag_id == cls.DAG_ID and
            TaskInstance.task_id == cls.TASK_ID and
            TaskInstance.execution_date == cls.DEFAULT_DATE).delete()
        session.commit()
        session.close()

    def setUp(self):
        super(TestLogView, self).setUp()

        configuration.load_test_config()
        logging_config = copy.deepcopy(DEFAULT_LOGGING_CONFIG)
        current_dir = os.path.dirname(os.path.abspath(__file__))
        logging_config['handlers']['file.task']['base_log_folder'] = os.path.normpath(
            os.path.join(current_dir, 'test_logs'))
        logging.config.dictConfig(logging_config)

        app = application.create_app(testing=True)
        self.app = app.test_client()
        self.session = Session()
        from airflow.www.views import dagbag
        dag = DAG(self.DAG_ID, start_date=self.DEFAULT_DATE)
        task = DummyOperator(task_id=self.TASK_ID, dag=dag)
        dagbag.bag_dag(dag, parent_dag=dag, root_dag=dag)
        ti = TaskInstance(task=task, execution_date=self.DEFAULT_DATE)
        ti.try_number = 1
        self.session.merge(ti)
        self.session.commit()

    def tearDown(self):
        logging.config.dictConfig(DEFAULT_LOGGING_CONFIG)
        dagbag = models.DagBag(settings.DAGS_FOLDER)
        self.session.query(TaskInstance).filter(
            TaskInstance.dag_id == self.DAG_ID and
            TaskInstance.task_id == self.TASK_ID and
            TaskInstance.execution_date == self.DEFAULT_DATE).delete()
        self.session.commit()
        self.session.close()
        super(TestLogView, self).tearDown()

    def test_get_file_task_log(self):
        response = self.app.get(
            TestLogView.ENDPOINT,
            follow_redirects=True,
        )
        self.assertEqual(response.status_code, 200)
        self.assertIn('<pre id="attempt-1">*** Reading local log.\nLog for testing.\n</pre>',
                      response.data.decode('utf-8'))


if __name__ == '__main__':
    unittest.main()
