from unittest.mock import ANY

import pytest
from flask import json

from app.dao.broadcast_message_dao import (
    dao_get_broadcast_message_by_id_and_service_id,
)
from tests import create_service_authorization_header
from tests.app.db import create_api_key

from . import sample_cap_xml_documents


def test_broadcast_for_service_without_permission_returns_400(
    client,
    sample_service,
):
    auth_header = create_service_authorization_header(service_id=sample_service.id)
    response = client.post(
        path='/v2/broadcast',
        data='',
        headers=[('Content-Type', 'application/json'), auth_header],
    )

    assert response.status_code == 400
    assert response.get_json()['errors'][0]['message'] == (
        'Service is not allowed to send broadcast messages'
    )


def test_post_broadcast_non_cap_xml_returns_415(
    client,
    sample_broadcast_service,
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    response = client.post(
        path='/v2/broadcast',
        data=json.dumps({
            'content': 'This is a test',
            'reference': 'abc123',
            'category': 'Other',
            'areas': [
                {
                    'name': 'Hackney Marshes',
                    'polygons': [[
                        [-0.038280487060546875, 51.55738264619775],
                        [-0.03184318542480469, 51.553913882566754],
                        [-0.023174285888671875, 51.55812972989382],
                        [-0.023174285888671999, 51.55812972989999],
                        [-0.029869079589843747, 51.56165153059717],
                        [-0.038280487060546875, 51.55738264619775],
                    ]],
                },
            ],
        }),
        headers=[('Content-Type', 'application/json'), auth_header],
    )

    assert response.status_code == 415
    assert json.loads(response.get_data(as_text=True)) == {
        'errors': [{
            'error': 'BadRequestError',
            'message': 'Content type application/json not supported'
        }],
        'status_code': 415,
    }


def test_valid_post_cap_xml_broadcast_returns_201(
    client,
    sample_broadcast_service,
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    response = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    assert response.status_code == 201

    response_json = json.loads(response.get_data(as_text=True))

    assert response_json['approved_at'] is None
    assert response_json['approved_by_id'] is None
    assert response_json['areas']['names'] == [
        'River Steeping in Wainfleet All Saints'
    ]
    assert response_json['cancelled_at'] is None
    assert response_json['cancelled_by_id'] is None
    assert response_json['content'].startswith(
        'A severe flood warning has been issued. Storm Dennis'
    )
    assert response_json['content'].endswith(
        'closely monitoring the situation throughout the night. '
    )
    assert response_json['reference'] == '50385fcb0ab7aa447bbd46d848ce8466E'
    assert response_json['cap_event'] == '053/055 Issue Severe Flood Warning EA'
    assert response_json['created_at']  # datetime generated by the DB so can’t freeze it
    assert response_json['created_by_id'] is None
    assert response_json['finishes_at'] is None
    assert response_json['id'] == ANY
    assert response_json['personalisation'] is None
    assert response_json['service_id'] == str(sample_broadcast_service.id)

    assert len(response_json['areas']['simple_polygons']) == 1
    assert len(response_json['areas']['simple_polygons'][0]) == 29
    assert response_json['areas']['simple_polygons'][0][0] == [53.10569, 0.24453]
    assert response_json['areas']['simple_polygons'][0][-1] == [53.10569, 0.24453]
    assert response_json['areas']['names'] == ['River Steeping in Wainfleet All Saints']
    assert 'ids' not in response_json['areas']  # only for broadcasts created in Admin

    assert response_json['starts_at'] is None
    assert response_json['status'] == 'pending-approval'
    assert response_json['template_id'] is None
    assert response_json['template_name'] is None
    assert response_json['template_version'] is None
    assert response_json['updated_at'] is None


@pytest.mark.parametrize("is_approved,expected_status", [
    [True, "cancelled"],
    [False, "rejected"]
])
def test_valid_cancel_broadcast_request_calls_update_broadcast_message_status_and_returns_201(
    client,
    sample_broadcast_service,
    mocker,
    is_approved,
    expected_status
):
    api_key = create_api_key(service=sample_broadcast_service)
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    mock_redis_delete = mocker.patch('app.redis_store.delete')

    # create a broadcast
    response_for_create = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    assert response_for_create.status_code == 201

    response_json_for_create = json.loads(response_for_create.get_data(as_text=True))

    broadcast_message = dao_get_broadcast_message_by_id_and_service_id(
        response_json_for_create["id"], response_json_for_create["service_id"]
    )
    # approve broadcast
    if is_approved:
        broadcast_message.status = 'broadcasting'

    mock_update = mocker.patch(
        'app.v2.broadcast.post_broadcast.broadcast_utils.update_broadcast_message_status'
    )

    # cancel broadcast
    response_for_cancel = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET_CANCEL_WITH_REFERENCES,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    assert response_for_cancel.status_code == 201
    mock_update.assert_called_once_with(
        broadcast_message,
        expected_status,
        api_key_id=api_key.id
    )
    mock_redis_delete.assert_called_once_with(
        f'service-{sample_broadcast_service.id}-broadcast-message-{broadcast_message.id}'
    )


@pytest.mark.parametrize('cap_xml_document, expected_status, expected_error', (
    (
        sample_cap_xml_documents.WAINFLEET_CANCEL_WITH_REFERENCES,
        404,
        [{'error': 'NoResultFound', 'message': 'No result found'}],
    ),
    (
        sample_cap_xml_documents.WAINFLEET_CANCEL_WITH_EMPTY_REFERENCES,
        404,
        [{'error': 'NoResultFound', 'message': 'No result found'}],
    ),
    (
        sample_cap_xml_documents.WAINFLEET_CANCEL_WITH_MISSING_REFERENCES,
        400,
        [{'error': 'BadRequestError', 'message': 'Missing <references>'}],
    ),
))
def test_cancel_request_does_not_cancel_broadcast_if_reference_does_not_match(
    client,
    sample_broadcast_service,
    cap_xml_document,
    expected_status,
    expected_error,
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    # create a broadcast
    response_for_create = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WINDEMERE,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    assert response_for_create.status_code == 201

    response_json_for_create = json.loads(response_for_create.get_data(as_text=True))

    assert response_json_for_create['cancelled_at'] is None
    assert response_json_for_create['cancelled_by_id'] is None
    assert response_json_for_create['reference'] == '4f6d28b10ab7aa447bbd46d85f1e9effE'
    assert response_json_for_create['status'] == 'pending-approval'

    # try to cancel broadcast, but reference doesn't match
    response_for_cancel = client.post(
        path='/v2/broadcast',
        data=cap_xml_document,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    response_for_cancel_json = json.loads(response_for_cancel.get_data(as_text=True))

    assert response_for_cancel.status_code == expected_status
    assert response_for_cancel_json["errors"] == expected_error


def test_cancel_raises_error_if_multiple_broadcasts_referenced(
    client,
    sample_broadcast_service,
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    for cap_document in (
        sample_cap_xml_documents.WAINFLEET,
        sample_cap_xml_documents.WINDEMERE,
    ):
        response_for_create = client.post(
            path='/v2/broadcast',
            data=cap_document,
            headers=[('Content-Type', 'application/cap+xml'), auth_header],
        )
        assert response_for_create.status_code == 201

    # try to cancel two broadcasts with one request
    response_for_cancel = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET_CANCEL_WITH_WINDMERE_REFERENCES,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    response_for_cancel_json = json.loads(response_for_cancel.get_data(as_text=True))

    assert response_for_cancel.status_code == 400
    assert response_for_cancel_json["errors"] == [{
        'error': 'BadRequestError',
        'message': 'Multiple alerts found - unclear which one to cancel',
    }]


def test_cancel_request_does_not_cancel_broadcast_if_service_id_does_not_match(
    client,
    sample_broadcast_service,
    sample_broadcast_service_2
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    # create a broadcast
    response_for_create = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    assert response_for_create.status_code == 201

    response_json_for_create = json.loads(response_for_create.get_data(as_text=True))

    assert response_json_for_create['cancelled_at'] is None
    assert response_json_for_create['cancelled_by_id'] is None
    assert response_json_for_create['reference'] == '50385fcb0ab7aa447bbd46d848ce8466E'
    assert response_json_for_create['status'] == 'pending-approval'

    # try to cancel broadcast, but service id doesn't match
    auth_header_2 = create_service_authorization_header(service_id=sample_broadcast_service_2.id)
    response_for_cancel = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET_CANCEL_WITH_REFERENCES,
        headers=[('Content-Type', 'application/cap+xml'), auth_header_2],
    )

    assert response_for_cancel.status_code == 404


@pytest.mark.parametrize("is_approved, expected_cancel_tasks", (
    (True, 1),
    (False, 0),
))
def test_same_broadcast_cant_be_cancelled_twice(
    mocker,
    client,
    sample_broadcast_service,
    is_approved,
    expected_cancel_tasks,
):
    mock_send_broadcast_event_task = mocker.patch(
        'app.celery.broadcast_message_tasks.send_broadcast_event.apply_async'
    )
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    # create a broadcast
    response_for_create = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    assert response_for_create.status_code == 201

    response_json_for_create = json.loads(response_for_create.get_data(as_text=True))

    broadcast_message = dao_get_broadcast_message_by_id_and_service_id(
        response_json_for_create["id"], response_json_for_create["service_id"]
    )
    # approve broadcast
    if is_approved:
        broadcast_message.status = 'broadcasting'

    first_response_for_cancel = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET_CANCEL_WITH_REFERENCES,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    assert first_response_for_cancel.status_code == 201

    second_response_for_cancel = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET_CANCEL_WITH_REFERENCES,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    assert second_response_for_cancel.status_code == 404

    assert len(mock_send_broadcast_event_task.call_args_list) == expected_cancel_tasks


def test_large_polygon_is_simplified(
    client,
    sample_broadcast_service,
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)
    response = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WINDEMERE,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )
    assert response.status_code == 201

    response_json = json.loads(response.get_data(as_text=True))

    assert len(response_json['areas']['simple_polygons']) == 1
    assert len(response_json['areas']['simple_polygons'][0]) == 110

    assert response_json['areas']['simple_polygons'][0][0] == [54.419546, -2.988521]
    assert response_json['areas']['simple_polygons'][0][-1] == [54.419546, -2.988521]


@pytest.mark.parametrize("training_mode_service", [True, False])
def test_valid_post_cap_xml_broadcast_sets_stubbed_to_true_for_training_mode_services(
    client,
    sample_broadcast_service,
    training_mode_service
):
    sample_broadcast_service.restricted = training_mode_service
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    response = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.WAINFLEET,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )

    assert response.status_code == 201
    response_json = json.loads(response.get_data(as_text=True))

    broadcast_message = dao_get_broadcast_message_by_id_and_service_id(
        response_json['id'], sample_broadcast_service.id
    )
    assert broadcast_message.stubbed == training_mode_service


@pytest.mark.parametrize('xml_document', (
    '<alert>Oh no</alert>',
    '<?xml version="1.0" encoding="utf-8" ?><foo><bar/></foo>',
))
def test_invalid_post_cap_xml_broadcast_returns_400(
    client,
    sample_broadcast_service,
    xml_document,
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    response = client.post(
        path='/v2/broadcast',
        data=xml_document,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )

    assert response.status_code == 400
    assert json.loads(response.get_data(as_text=True)) == {
        'errors': [{
            'error': 'BadRequestError',
            'message': 'Request data is not valid CAP XML'
        }],
        'status_code': 400,
    }


def test_unsupported_message_types_400(
    client,
    sample_broadcast_service,
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)

    response = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.UPDATE,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )

    assert response.status_code == 400
    assert {
        'error': 'ValidationError',
        'message': 'msgType Update is not one of [Alert, Cancel]',
    } in (
        json.loads(response.get_data(as_text=True))['errors']
    )


@pytest.mark.parametrize('xml_document, expected_error', (
    (sample_cap_xml_documents.LONG_UCS2, (
        'description must be 615 characters or fewer (because it '
        'could not be GSM7 encoded)'
    )),
    (sample_cap_xml_documents.LONG_GSM7, (
        'description must be 1,395 characters or fewer'
    )),
))
def test_content_too_long_returns_400(
    client,
    sample_broadcast_service,
    xml_document,
    expected_error,
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)
    response = client.post(
        path='/v2/broadcast',
        data=xml_document,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )

    assert json.loads(response.get_data(as_text=True)) == {
        'errors': [{
            'error': 'ValidationError',
            'message': expected_error,
        }],
        'status_code': 400,
    }


def test_invalid_areas_returns_400(
    client,
    sample_broadcast_service
):
    auth_header = create_service_authorization_header(service_id=sample_broadcast_service.id)
    response = client.post(
        path='/v2/broadcast',
        data=sample_cap_xml_documents.MISSING_AREA_NAMES,
        headers=[('Content-Type', 'application/cap+xml'), auth_header],
    )

    assert json.loads(response.get_data(as_text=True)) == {
        'errors': [{
            'error': 'ValidationError',
            # the blank spaces represent the blank areaDesc in the XML
            'message': 'areas   does not match ([a-zA-Z1-9]+ )*[a-zA-Z1-9]+',
        }],
        'status_code': 400,
    }