from unittest.mock import ANY, Mock

import pytest
from bs4 import BeautifulSoup
from flask import url_for
from notifications_python_client.errors import HTTPError

import app
from tests.conftest import (
    SERVICE_ONE_ID,
    USER_ONE_ID,
    create_active_caseworking_user,
    create_active_user_with_permissions,
    create_api_user_active,
    normalize_spaces,
)


def test_existing_user_accept_invite_calls_api_and_redirects_to_dashboard(
    client,
    service_one,
    api_user_active,
    mock_check_invite_token,
    mock_get_unknown_user_by_email,
    mock_get_users_by_service,
    mock_accept_invite,
    mock_add_user_to_service,
    mock_get_service,
    mocker,
):
    expected_service = service_one['id']
    expected_permissions = {'view_activity', 'send_messages', 'manage_service', 'manage_api_keys'}

    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'))

    mock_check_invite_token.assert_called_with('thisisnotarealtoken')
    mock_get_unknown_user_by_email.assert_called_with('invited_user@test.gov.uk')
    assert mock_accept_invite.call_count == 1
    mock_add_user_to_service.assert_called_with(
        expected_service,
        USER_ONE_ID,
        expected_permissions,
        [],
    )

    assert response.status_code == 302
    assert response.location == url_for('main.service_dashboard', service_id=expected_service, _external=True)


def test_existing_user_with_no_permissions_or_folder_permissions_accept_invite(
    client,
    mocker,
    service_one,
    api_user_active,
    sample_invite,
    mock_check_invite_token,
    mock_get_unknown_user_by_email,
    mock_get_users_by_service,
    mock_add_user_to_service,
    mock_get_service,
):
    expected_service = service_one['id']
    sample_invite['permissions'] = ''
    expected_permissions = set()
    expected_folder_permissions = []
    mocker.patch('app.invite_api_client.accept_invite', return_value=sample_invite)

    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'))
    mock_add_user_to_service.assert_called_with(expected_service,
                                                USER_ONE_ID,
                                                expected_permissions,
                                                expected_folder_permissions)

    assert response.status_code == 302


def test_if_existing_user_accepts_twice_they_redirect_to_sign_in(
    client,
    mocker,
    sample_invite,
    mock_get_service,
):
    sample_invite['status'] = 'accepted'
    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)

    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'), follow_redirects=True)
    assert response.status_code == 200
    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
    assert (
        page.h1.string,
        page.select('main p')[0].text.strip(),
    ) == (
        'You need to sign in again',
        'We signed you out because you have not used Notify for a while.',
    )


def test_invite_goes_in_session(
    client_request,
    mocker,
    sample_invite,
    mock_get_service,
    api_user_active,
    mock_check_invite_token,
    mock_get_user_by_email,
    mock_get_users_by_service,
    mock_add_user_to_service,
    mock_accept_invite,
):
    sample_invite['email_address'] = 'test@user.gov.uk'
    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)

    client_request.get(
        'main.accept_invite',
        token='thisisnotarealtoken',
        _expected_status=302,
        _expected_redirect=url_for(
            'main.service_dashboard',
            service_id=SERVICE_ONE_ID,
            _external=True,
        ),
        _follow_redirects=False,
    )

    with client_request.session_transaction() as session:
        assert session['invited_user']['email_address'] == 'test@user.gov.uk'


@pytest.mark.parametrize('user, landing_page_title', [
    (create_active_user_with_permissions(), 'Dashboard'),
    (create_active_caseworking_user(), 'Templates'),
])
def test_accepting_invite_removes_invite_from_session(
    client_request,
    mocker,
    sample_invite,
    mock_get_service,
    service_one,
    mock_check_invite_token,
    mock_get_user_by_email,
    mock_get_users_by_service,
    mock_add_user_to_service,
    mock_accept_invite,
    mock_get_service_templates,
    mock_get_template_statistics,
    mock_get_jobs,
    mock_get_service_statistics,
    mock_get_template_folders,
    mock_get_usage,
    mock_get_billable_units,
    mock_get_free_sms_fragment_limit,
    mock_get_inbound_sms_summary,
    mock_get_returned_letter_statistics_with_no_returned_letters,
    fake_uuid,
    user,
    landing_page_title,
):
    sample_invite['email_address'] = user['email_address']

    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)
    client_request.login(user)

    page = client_request.get(
        'main.accept_invite',
        token='thisisnotarealtoken',
        _follow_redirects=True,
    )
    assert normalize_spaces(page.select_one('h1').text) == landing_page_title

    with client_request.session_transaction() as session:
        assert 'invited_user' not in session


def test_existing_user_of_service_get_redirected_to_signin(
    client,
    mocker,
    api_user_active,
    sample_invite,
    mock_get_service,
    mock_get_user_by_email,
    mock_accept_invite,
):
    sample_invite['email_address'] = api_user_active['email_address']
    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)
    mocker.patch('app.models.user.Users.client_method', return_value=[api_user_active])

    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'), follow_redirects=True)
    assert response.status_code == 200
    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
    assert (
        page.h1.string,
        page.select('main p')[0].text.strip(),
    ) == (
        'You need to sign in again',
        'We signed you out because you have not used Notify for a while.',
    )
    assert mock_accept_invite.call_count == 1


def test_accept_invite_redirects_if_api_raises_an_error_that_they_are_already_part_of_the_service(
    client,
    mocker,
    api_user_active,
    sample_invite,
    mock_accept_invite,
    mock_get_service,
    mock_get_users_by_service
):
    sample_invite['email_address'] = api_user_active['email_address']

    # This mock needs to return a user with a different ID to the invited user so that
    # `existing_user in Users(invited_user.service)` returns False and the right code path is tested
    mocker.patch('app.user_api_client.get_user_by_email', return_value=create_api_user_active(with_unique_id=True))
    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)

    mocker.patch('app.user_api_client.add_user_to_service', side_effect=HTTPError(
        response=Mock(
            status_code=400,
            json={
                "result": "error",
                "message": {f"User id: {api_user_active['id']} already part of service id: {SERVICE_ONE_ID}"}
            },
        ),
        message=f"User id: {api_user_active['id']} already part of service id: {SERVICE_ONE_ID}"
    ))

    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'), follow_redirects=False)
    assert response.location == url_for('main.service_dashboard', service_id=SERVICE_ONE_ID, _external=True)


def test_existing_signed_out_user_accept_invite_redirects_to_sign_in(
    client,
    service_one,
    api_user_active,
    sample_invite,
    mock_check_invite_token,
    mock_get_unknown_user_by_email,
    mock_get_users_by_service,
    mock_add_user_to_service,
    mock_accept_invite,
    mock_get_service,
    mocker,
):
    expected_service = service_one['id']
    expected_permissions = {'view_activity', 'send_messages', 'manage_service', 'manage_api_keys'}

    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'), follow_redirects=True)

    mock_check_invite_token.assert_called_with('thisisnotarealtoken')
    mock_get_unknown_user_by_email.assert_called_with('invited_user@test.gov.uk')
    mock_add_user_to_service.assert_called_with(expected_service,
                                                USER_ONE_ID,
                                                expected_permissions,
                                                sample_invite['folder_permissions'])
    assert mock_accept_invite.call_count == 1

    assert response.status_code == 200
    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
    assert (
        page.h1.string,
        page.select('main p')[0].text.strip(),
    ) == (
        'You need to sign in again',
        'We signed you out because you have not used Notify for a while.',
    )


def test_new_user_accept_invite_calls_api_and_redirects_to_registration(
    client,
    service_one,
    mock_check_invite_token,
    mock_dont_get_user_by_email,
    mock_add_user_to_service,
    mock_get_users_by_service,
    mock_get_service,
    mocker,
):
    expected_redirect_location = 'http://localhost/register-from-invite'

    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'))

    mock_check_invite_token.assert_called_with('thisisnotarealtoken')
    mock_dont_get_user_by_email.assert_called_with('invited_user@test.gov.uk')

    assert response.status_code == 302
    assert response.location == expected_redirect_location


def test_new_user_accept_invite_calls_api_and_views_registration_page(
    client,
    service_one,
    mock_check_invite_token,
    mock_dont_get_user_by_email,
    mock_add_user_to_service,
    mock_get_users_by_service,
    mock_get_service,
    mocker,
):
    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'), follow_redirects=True)

    mock_check_invite_token.assert_called_with('thisisnotarealtoken')
    mock_dont_get_user_by_email.assert_called_with('invited_user@test.gov.uk')

    assert response.status_code == 200
    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
    assert page.h1.string.strip() == 'Create an account'

    assert normalize_spaces(page.select_one('main p').text) == (
        'Your account will be created with this email address: '
        'invited_user@test.gov.uk'
    )

    form = page.find('form')
    name = form.find('input', id='name')
    password = form.find('input', id='password')
    service = form.find('input', type='hidden', id='service')
    email = form.find('input', type='hidden', id='email_address')

    assert email
    assert email.attrs['value'] == 'invited_user@test.gov.uk'
    assert name
    assert password
    assert service
    assert service.attrs['value'] == service_one['id']


def test_cancelled_invited_user_accepts_invited_redirect_to_cancelled_invitation(
    client,
    mock_get_user,
    mock_get_service,
    sample_invite,
    mock_check_invite_token,
):
    sample_invite['status'] = 'cancelled'
    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'))

    app.invite_api_client.check_token.assert_called_with('thisisnotarealtoken')
    assert response.status_code == 200
    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')
    assert page.h1.string.strip() == 'The invitation you were sent has been cancelled'


@pytest.mark.parametrize('admin_endpoint, api_endpoint', [
    ('main.accept_invite', 'app.invite_api_client.check_token'),
    ('main.accept_org_invite', 'app.org_invite_api_client.check_token'),
])
def test_new_user_accept_invite_with_malformed_token(
    admin_endpoint,
    api_endpoint,
    client,
    service_one,
    mocker,
):
    mocker.patch(api_endpoint, side_effect=HTTPError(
        response=Mock(
            status_code=400,
            json={
                'result': 'error',
                'message': {
                    'invitation': {
                        'Something’s wrong with this link. Make sure you’ve copied the whole thing.'
                    }
                }
            }
        ),
        message={'invitation': 'Something’s wrong with this link. Make sure you’ve copied the whole thing.'}
    ))

    response = client.get(url_for(admin_endpoint, token='thisisnotarealtoken'), follow_redirects=True)

    assert response.status_code == 200
    page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')

    assert normalize_spaces(
        page.select_one('.banner-dangerous').text
    ) == 'Something’s wrong with this link. Make sure you’ve copied the whole thing.'


def test_new_user_accept_invite_completes_new_registration_redirects_to_verify(
    client,
    service_one,
    sample_invite,
    api_user_active,
    mock_check_invite_token,
    mock_dont_get_user_by_email,
    mock_email_is_not_already_in_use,
    mock_register_user,
    mock_send_verify_code,
    mock_accept_invite,
    mock_get_users_by_service,
    mock_add_user_to_service,
    mock_get_service,
    mocker,
):
    expected_service = service_one['id']
    expected_email = sample_invite['email_address']
    expected_from_user = service_one['users'][0]
    expected_redirect_location = 'http://localhost/register-from-invite'

    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'))
    with client.session_transaction() as session:
        assert response.status_code == 302
        assert response.location == expected_redirect_location
        invited_user = session.get('invited_user')
        assert invited_user
        assert expected_service == invited_user['service']
        assert expected_email == invited_user['email_address']
        assert expected_from_user == invited_user['from_user']

    data = {'service': invited_user['service'],
            'email_address': invited_user['email_address'],
            'from_user': invited_user['from_user'],
            'password': 'longpassword',
            'mobile_number': '+447890123456',
            'name': 'Invited User',
            'auth_type': 'email_auth'
            }

    expected_redirect_location = 'http://localhost/verify'
    response = client.post(url_for('main.register_from_invite'), data=data)
    assert response.status_code == 302
    assert response.location == expected_redirect_location

    mock_send_verify_code.assert_called_once_with(ANY, 'sms', data['mobile_number'])

    mock_register_user.assert_called_with(data['name'],
                                          data['email_address'],
                                          data['mobile_number'],
                                          data['password'],
                                          data['auth_type'])

    assert mock_accept_invite.call_count == 1


def test_signed_in_existing_user_cannot_use_anothers_invite(
    client_request,
    mocker,
    api_user_active,
    sample_invite,
    mock_get_user,
    mock_accept_invite,
    mock_get_service,
):
    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)
    mocker.patch('app.user_api_client.get_users_for_service', return_value=[api_user_active])

    page = client_request.get(
        'main.accept_invite',
        token='thisisnotarealtoken',
        _follow_redirects=True,
        _expected_status=403,
    )
    assert page.h1.string.strip() == 'You’re not allowed to see this page'
    flash_banners = page.find_all('div', class_='banner-dangerous')
    assert len(flash_banners) == 1
    banner_contents = normalize_spaces(flash_banners[0].text)
    assert "You’re signed in as test@user.gov.uk." in banner_contents
    assert "This invite is for another email address." in banner_contents
    assert "Sign out and click the link again to accept this invite." in banner_contents
    assert mock_accept_invite.call_count == 0


def test_accept_invite_does_not_treat_email_addresses_as_case_sensitive(
    client_request,
    mocker,
    api_user_active,
    sample_invite,
    mock_accept_invite,
    mock_get_user_by_email
):
    # the email address of api_user_active is 'test@user.gov.uk'
    sample_invite['email_address'] = 'TEST@user.gov.uk'
    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)
    mocker.patch('app.models.user.Users.client_method', return_value=[api_user_active])

    client_request.get(
        'main.accept_invite',
        token='thisisnotarealtoken',
        _expected_status=302,
        _expected_redirect=url_for(
            'main.service_dashboard',
            service_id=SERVICE_ONE_ID,
            _external=True,
        )
    )


def test_new_invited_user_verifies_and_added_to_service(
    client,
    service_one,
    sample_invite,
    api_user_active,
    mock_check_invite_token,
    mock_dont_get_user_by_email,
    mock_email_is_not_already_in_use,
    mock_register_user,
    mock_send_verify_code,
    mock_check_verify_code,
    mock_get_user,
    mock_update_user_attribute,
    mock_add_user_to_service,
    mock_accept_invite,
    mock_get_service,
    mock_get_service_templates,
    mock_get_template_statistics,
    mock_get_jobs,
    mock_has_permissions,
    mock_get_users_by_service,
    mock_get_service_statistics,
    mock_get_usage,
    mock_get_free_sms_fragment_limit,
    mock_get_returned_letter_statistics_with_no_returned_letters,
    mock_create_event,
    mocker,
):
    # visit accept token page
    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'))
    assert response.status_code == 302
    assert response.location == url_for('main.register_from_invite', _external=True)

    # get redirected to register from invite
    data = {
        'service': sample_invite['service'],
        'email_address': sample_invite['email_address'],
        'from_user': sample_invite['from_user'],
        'password': 'longpassword',
        'mobile_number': '+447890123456',
        'name': 'Invited User',
        'auth_type': 'sms_auth'
    }
    response = client.post(url_for('main.register_from_invite'), data=data)
    assert response.status_code == 302
    assert response.location == url_for('main.verify', _external=True)

    # that sends user on to verify
    response = client.post(url_for('main.verify'), data={'sms_code': '12345'}, follow_redirects=True)
    assert response.status_code == 200

    # when they post codes back to admin user should be added to
    # service and sent on to dash board
    expected_permissions = {'view_activity', 'send_messages', 'manage_service', 'manage_api_keys'}

    with client.session_transaction() as session:
        new_user_id = session['user_id']
        mock_add_user_to_service.assert_called_with(data['service'], new_user_id, expected_permissions, [])
        mock_accept_invite.assert_called_with(data['service'], sample_invite['id'])
        mock_check_verify_code.assert_called_once_with(new_user_id, '12345', 'sms')
        assert service_one['id'] == session['service_id']

    raw_html = response.data.decode('utf-8')
    page = BeautifulSoup(raw_html, 'html.parser')
    assert page.find('h1').text == 'Dashboard'


def test_existing_user_accepts_and_sets_email_auth(
    client_request,
    api_user_active,
    service_one,
    sample_invite,
    mock_get_unknown_user_by_email,
    mock_get_users_by_service,
    mock_accept_invite,
    mock_update_user_attribute,
    mock_add_user_to_service,
    mocker
):
    sample_invite['email_address'] = api_user_active['email_address']

    service_one['permissions'].append('email_auth')
    sample_invite['auth_type'] = 'email_auth'
    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)

    client_request.get(
        'main.accept_invite',
        token='thisisnotarealtoken',
        _expected_status=302,
        _expected_redirect=url_for('main.service_dashboard', service_id=service_one['id'], _external=True),
    )

    mock_get_unknown_user_by_email.assert_called_once_with('test@user.gov.uk')
    mock_update_user_attribute.assert_called_once_with(USER_ONE_ID, auth_type='email_auth')
    mock_add_user_to_service.assert_called_once_with(ANY, USER_ONE_ID, ANY, ANY)


def test_existing_user_doesnt_get_auth_changed_by_service_without_permission(
    client_request,
    api_user_active,
    service_one,
    sample_invite,
    mock_get_user_by_email,
    mock_get_users_by_service,
    mock_accept_invite,
    mock_update_user_attribute,
    mock_add_user_to_service,
    mocker
):
    sample_invite['email_address'] = api_user_active['email_address']

    assert 'email_auth' not in service_one['permissions']

    sample_invite['auth_type'] = 'email_auth'
    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)

    client_request.get(
        'main.accept_invite',
        token='thisisnotarealtoken',
        _expected_status=302,
        _expected_redirect=url_for('main.service_dashboard', service_id=service_one['id'], _external=True),
    )

    assert not mock_update_user_attribute.called


def test_existing_email_auth_user_without_phone_cannot_set_sms_auth(
    client_request,
    api_user_active,
    service_one,
    sample_invite,
    mock_get_users_by_service,
    mock_accept_invite,
    mock_update_user_attribute,
    mock_add_user_to_service,
    mocker
):
    sample_invite['email_address'] = api_user_active['email_address']

    service_one['permissions'].append('email_auth')

    api_user_active['auth_type'] = 'email_auth'
    api_user_active['mobile_number'] = None
    sample_invite['auth_type'] = 'sms_auth'

    mocker.patch('app.user_api_client.get_user_by_email', return_value=api_user_active)
    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)

    client_request.get(
        'main.accept_invite',
        token='thisisnotarealtoken',
        _expected_status=302,
        _expected_redirect=url_for('main.service_dashboard', service_id=service_one['id'], _external=True),
    )

    assert not mock_update_user_attribute.called


def test_existing_email_auth_user_with_phone_can_set_sms_auth(
    client_request,
    api_user_active,
    service_one,
    sample_invite,
    mock_get_users_by_service,
    mock_get_unknown_user_by_email,
    mock_accept_invite,
    mock_update_user_attribute,
    mock_add_user_to_service,
    mocker
):
    sample_invite['email_address'] = api_user_active['email_address']
    service_one['permissions'].append('email_auth')
    sample_invite['auth_type'] = 'sms_auth'

    mocker.patch('app.invite_api_client.check_token', return_value=sample_invite)

    client_request.get(
        'main.accept_invite',
        token='thisisnotarealtoken',
        _expected_status=302,
        _expected_redirect=url_for('main.service_dashboard', service_id=service_one['id'], _external=True),
    )

    mock_get_unknown_user_by_email.assert_called_once_with(sample_invite['email_address'])
    mock_update_user_attribute.assert_called_once_with(USER_ONE_ID, auth_type='sms_auth')