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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
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#   http://www.apache.org/licenses/LICENSE-2.0
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import unittest
from unittest import mock
from unittest.mock import patch

import pytest
import requests

from airflow.exceptions import AirflowException, AirflowSensorTimeout
from airflow.models import TaskInstance
from airflow.models.dag import DAG
from airflow.providers.http.operators.http import SimpleHttpOperator
from airflow.providers.http.sensors.http import HttpSensor
from airflow.utils.timezone import datetime

DEFAULT_DATE = datetime(2015, 1, 1)
DEFAULT_DATE_ISO = DEFAULT_DATE.isoformat()
TEST_DAG_ID = 'unit_test_dag'


class TestHttpSensor(unittest.TestCase):
    def setUp(self):
        args = {'owner': 'airflow', 'start_date': DEFAULT_DATE}
        self.dag = DAG(TEST_DAG_ID, default_args=args)

    @patch("airflow.providers.http.hooks.http.requests.Session.send")
    def test_poke_exception(self, mock_session_send):
        """
        Exception occurs in poke function should not be ignored.
        """
        response = requests.Response()
        response.status_code = 200
        mock_session_send.return_value = response

        def resp_check(_):
            raise AirflowException('AirflowException raised here!')

        task = HttpSensor(
            task_id='http_sensor_poke_exception',
            http_conn_id='http_default',
            endpoint='',
            request_params={},
            response_check=resp_check,
            timeout=5,
            poke_interval=1,
        )
        with pytest.raises(AirflowException, match='AirflowException raised here!'):
            task.execute(context={})

    @patch("airflow.providers.http.hooks.http.requests.Session.send")
    def test_poke_continues_for_http_500_with_extra_options_check_response_false(self, mock_session_send):
        def resp_check(_):
            return False

        response = requests.Response()
        response.status_code = 500
        response.reason = 'Internal Server Error'
        response._content = b'Internal Server Error'
        mock_session_send.return_value = response

        task = HttpSensor(
            dag=self.dag,
            task_id='http_sensor_poke_for_code_500',
            http_conn_id='http_default',
            endpoint='',
            request_params={},
            method='HEAD',
            response_check=resp_check,
            extra_options={'check_response': False},
            timeout=5,
            poke_interval=1,
        )

        with self.assertRaises(AirflowSensorTimeout):
            task.execute(context={})

    @patch("airflow.providers.http.hooks.http.requests.Session.send")
    def test_head_method(self, mock_session_send):
        def resp_check(_):
            return True

        task = HttpSensor(
            dag=self.dag,
            task_id='http_sensor_head_method',
            http_conn_id='http_default',
            endpoint='',
            request_params={},
            method='HEAD',
            response_check=resp_check,
            timeout=5,
            poke_interval=1,
        )

        task.execute(context={})

        args, kwargs = mock_session_send.call_args
        received_request = args[0]

        prep_request = requests.Request('HEAD', 'https://www.httpbin.org', {}).prepare()

        assert prep_request.url == received_request.url
        assert prep_request.method, received_request.method

    @patch("airflow.providers.http.hooks.http.requests.Session.send")
    def test_poke_context(self, mock_session_send):
        response = requests.Response()
        response.status_code = 200
        mock_session_send.return_value = response

        def resp_check(_, execution_date):
            if execution_date == DEFAULT_DATE:
                return True
            raise AirflowException('AirflowException raised here!')

        task = HttpSensor(
            task_id='http_sensor_poke_exception',
            http_conn_id='http_default',
            endpoint='',
            request_params={},
            response_check=resp_check,
            timeout=5,
            poke_interval=1,
            dag=self.dag,
        )

        task_instance = TaskInstance(task=task, execution_date=DEFAULT_DATE)
        task.execute(task_instance.get_template_context())

    @patch("airflow.providers.http.hooks.http.requests.Session.send")
    def test_logging_head_error_request(self, mock_session_send):
        def resp_check(_):
            return True

        response = requests.Response()
        response.status_code = 404
        response.reason = 'Not Found'
        response._content = b'This endpoint doesnt exist'
        mock_session_send.return_value = response

        task = HttpSensor(
            dag=self.dag,
            task_id='http_sensor_head_method',
            http_conn_id='http_default',
            endpoint='',
            request_params={},
            method='HEAD',
            response_check=resp_check,
            timeout=5,
            poke_interval=1,
        )

        with mock.patch.object(task.hook.log, 'error') as mock_errors:
            with pytest.raises(AirflowSensorTimeout):
                task.execute(None)

            assert mock_errors.called
            calls = [
                mock.call('HTTP error: %s', 'Not Found'),
                mock.call('This endpoint doesnt exist'),
                mock.call('HTTP error: %s', 'Not Found'),
                mock.call('This endpoint doesnt exist'),
                mock.call('HTTP error: %s', 'Not Found'),
                mock.call('This endpoint doesnt exist'),
                mock.call('HTTP error: %s', 'Not Found'),
                mock.call('This endpoint doesnt exist'),
                mock.call('HTTP error: %s', 'Not Found'),
                mock.call('This endpoint doesnt exist'),
                mock.call('HTTP error: %s', 'Not Found'),
                mock.call('This endpoint doesnt exist'),
            ]
            mock_errors.assert_has_calls(calls)


class FakeSession:
    def __init__(self):
        self.response = requests.Response()
        self.response.status_code = 200
        self.response._content = 'apache/airflow'.encode('ascii', 'ignore')

    def send(self, *args, **kwargs):
        return self.response

    def prepare_request(self, request):
        if 'date' in request.params:
            self.response._content += ('/' + request.params['date']).encode('ascii', 'ignore')
        return self.response


class TestHttpOpSensor(unittest.TestCase):
    def setUp(self):
        args = {'owner': 'airflow', 'start_date': DEFAULT_DATE_ISO}
        dag = DAG(TEST_DAG_ID, default_args=args)
        self.dag = dag

    @mock.patch('requests.Session', FakeSession)
    def test_get(self):
        op = SimpleHttpOperator(
            task_id='get_op',
            method='GET',
            endpoint='/search',
            data={"client": "ubuntu", "q": "airflow"},
            headers={},
            dag=self.dag,
        )
        op.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)

    @mock.patch('requests.Session', FakeSession)
    def test_get_response_check(self):
        op = SimpleHttpOperator(
            task_id='get_op',
            method='GET',
            endpoint='/search',
            data={"client": "ubuntu", "q": "airflow"},
            response_check=lambda response: ("apache/airflow" in response.text),
            headers={},
            dag=self.dag,
        )
        op.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)

    @mock.patch('requests.Session', FakeSession)
    def test_sensor(self):
        sensor = HttpSensor(
            task_id='http_sensor_check',
            http_conn_id='http_default',
            endpoint='/search',
            request_params={"client": "ubuntu", "q": "airflow", 'date': '{{ds}}'},
            headers={},
            response_check=lambda response: (
                "apache/airflow/" + DEFAULT_DATE.strftime('%Y-%m-%d') in response.text
            ),
            poke_interval=5,
            timeout=15,
            dag=self.dag,
        )
        sensor.run(start_date=DEFAULT_DATE, end_date=DEFAULT_DATE, ignore_ti_state=True)