import json
import random
import string
import uuid
from datetime import datetime, timedelta

import pytest
from freezegun import freeze_time
from notifications_utils import SMS_CHAR_COUNT_LIMIT

from app.dao.templates_dao import dao_get_template_by_id, dao_redact_template
from app.models import EMAIL_TYPE, SMS_TYPE, Template, TemplateHistory
from tests import create_admin_authorization_header
from tests.app.db import create_service, create_template, create_template_folder


@pytest.mark.parametrize('template_type, subject', [
    (SMS_TYPE, None),
    (EMAIL_TYPE, 'subject'),
])
def test_should_create_a_new_template_for_a_service(
    client, sample_user, template_type, subject
):
    service = create_service(service_permissions=[template_type])
    data = {
        'name': 'my template',
        'template_type': template_type,
        'content': 'template <b>content</b>',
        'service': str(service.id),
        'created_by': str(sample_user.id)
    }
    if subject:
        data.update({'subject': subject})
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template'.format(service.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    assert response.status_code == 201
    json_resp = json.loads(response.get_data(as_text=True))
    assert json_resp['data']['name'] == 'my template'
    assert json_resp['data']['template_type'] == template_type
    assert json_resp['data']['content'] == 'template <b>content</b>'
    assert json_resp['data']['service'] == str(service.id)
    assert json_resp['data']['id']
    assert json_resp['data']['version'] == 1
    assert json_resp['data']['process_type'] == 'normal'
    assert json_resp['data']['created_by'] == str(sample_user.id)
    if subject:
        assert json_resp['data']['subject'] == 'subject'
    else:
        assert not json_resp['data']['subject']

    template = Template.query.get(json_resp['data']['id'])
    from app.schemas import template_schema
    assert sorted(json_resp['data']) == sorted(template_schema.dump(template))


def test_create_a_new_template_for_a_service_adds_folder_relationship(
    client, sample_service
):
    parent_folder = create_template_folder(service=sample_service, name='parent folder')

    data = {
        'name': 'my template',
        'template_type': 'sms',
        'content': 'template <b>content</b>',
        'service': str(sample_service.id),
        'created_by': str(sample_service.users[0].id),
        'parent_folder_id': str(parent_folder.id)
    }
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template'.format(sample_service.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    assert response.status_code == 201
    template = Template.query.filter(Template.name == 'my template').first()
    assert template.folder == parent_folder


def test_create_template_should_return_400_if_folder_is_for_a_different_service(
        client, sample_service
):
    service2 = create_service(service_name='second service')
    parent_folder = create_template_folder(service=service2)

    data = {
        'name': 'my template',
        'template_type': 'sms',
        'content': 'template <b>content</b>',
        'service': str(sample_service.id),
        'created_by': str(sample_service.users[0].id),
        'parent_folder_id': str(parent_folder.id)
    }
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template'.format(sample_service.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    assert response.status_code == 400
    assert json.loads(response.get_data(as_text=True))['message'] == 'parent_folder_id not found'


def test_create_template_should_return_400_if_folder_does_not_exist(
        client, sample_service
):
    data = {
        'name': 'my template',
        'template_type': 'sms',
        'content': 'template <b>content</b>',
        'service': str(sample_service.id),
        'created_by': str(sample_service.users[0].id),
        'parent_folder_id': str(uuid.uuid4())
    }
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template'.format(sample_service.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    assert response.status_code == 400
    assert json.loads(response.get_data(as_text=True))['message'] == 'parent_folder_id not found'


def test_should_raise_error_if_service_does_not_exist_on_create(client, sample_user, fake_uuid):
    data = {
        'name': 'my template',
        'template_type': SMS_TYPE,
        'content': 'template content',
        'service': fake_uuid,
        'created_by': str(sample_user.id)
    }
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template'.format(fake_uuid),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    json_resp = json.loads(response.get_data(as_text=True))
    assert response.status_code == 404
    assert json_resp['result'] == 'error'
    assert json_resp['message'] == 'No result found'


@pytest.mark.parametrize('permissions, template_type, subject, expected_error', [
    ([EMAIL_TYPE], SMS_TYPE, None, {'template_type': ['Creating text message templates is not allowed']}),
    ([SMS_TYPE], EMAIL_TYPE, 'subject', {'template_type': ['Creating email templates is not allowed']}),
])
def test_should_raise_error_on_create_if_no_permission(
        client, sample_user, permissions, template_type, subject, expected_error):
    service = create_service(service_permissions=permissions)
    data = {
        'name': 'my template',
        'template_type': template_type,
        'content': 'template content',
        'service': str(service.id),
        'created_by': str(sample_user.id)
    }
    if subject:
        data.update({'subject': subject})

    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template'.format(service.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    json_resp = json.loads(response.get_data(as_text=True))
    assert response.status_code == 403
    assert json_resp['result'] == 'error'
    assert json_resp['message'] == expected_error


@pytest.mark.parametrize('template_type, permissions, expected_error', [
    (SMS_TYPE, [EMAIL_TYPE], {'template_type': ['Updating text message templates is not allowed']}),
    (EMAIL_TYPE, [SMS_TYPE], {'template_type': ['Updating email templates is not allowed']}),
])
def test_should_be_error_on_update_if_no_permission(
    client,
    sample_user,
    notify_db_session,
    template_type,
    permissions,
    expected_error,
):
    service = create_service(service_permissions=permissions)
    template_without_permission = create_template(service, template_type=template_type)
    data = {
        'content': 'new template content',
        'created_by': str(sample_user.id)
    }

    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    update_response = client.post(
        '/service/{}/template/{}'.format(
            template_without_permission.service_id, template_without_permission.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )

    json_resp = json.loads(update_response.get_data(as_text=True))
    assert update_response.status_code == 403
    assert json_resp['result'] == 'error'
    assert json_resp['message'] == expected_error


def test_should_error_if_created_by_missing(client, sample_user, sample_service):
    service_id = str(sample_service.id)
    data = {
        'name': 'my template',
        'template_type': SMS_TYPE,
        'content': 'template content',
        'service': service_id
    }
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template'.format(service_id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    json_resp = json.loads(response.get_data(as_text=True))
    assert response.status_code == 400
    assert json_resp["errors"][0]["error"] == 'ValidationError'
    assert json_resp["errors"][0]["message"] == 'created_by is a required property'


def test_should_be_error_if_service_does_not_exist_on_update(client, fake_uuid):
    data = {
        'name': 'my template'
    }
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template/{}'.format(fake_uuid, fake_uuid),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    json_resp = json.loads(response.get_data(as_text=True))
    assert response.status_code == 404
    assert json_resp['result'] == 'error'
    assert json_resp['message'] == 'No result found'


@pytest.mark.parametrize('template_type', [EMAIL_TYPE])
def test_must_have_a_subject_on_an_email_template(client, sample_user, sample_service, template_type):
    data = {
        'name': 'my template',
        'template_type': template_type,
        'content': 'template content',
        'service': str(sample_service.id),
        'created_by': str(sample_user.id)
    }
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template'.format(sample_service.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    json_resp = json.loads(response.get_data(as_text=True))
    assert json_resp['errors'][0]['error'] == "ValidationError"
    assert json_resp['errors'][0]["message"] == 'subject is a required property'


def test_update_should_update_a_template(client, sample_user):

    service = create_service()
    template = create_template(service, template_type="sms")

    assert template.created_by == service.created_by
    assert template.created_by != sample_user

    data = {
        'content': 'my template has new content, swell!',
        'created_by': str(sample_user.id),
    }
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    update_response = client.post(
        '/service/{}/template/{}'.format(service.id, template.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )

    assert update_response.status_code == 200
    update_json_resp = json.loads(update_response.get_data(as_text=True))
    assert update_json_resp['data']['content'] == (
        'my template has new content, swell!'
    )
    assert update_json_resp['data']['name'] == template.name
    assert update_json_resp['data']['template_type'] == template.template_type
    assert update_json_resp['data']['version'] == 2

    assert update_json_resp['data']['created_by'] == str(sample_user.id)
    template_created_by_users = [template.created_by_id for template in TemplateHistory.query.all()]
    assert len(template_created_by_users) == 2
    assert service.created_by.id in template_created_by_users
    assert sample_user.id in template_created_by_users


def test_should_be_able_to_archive_template(client, sample_template):
    data = {
        'name': sample_template.name,
        'template_type': sample_template.template_type,
        'content': sample_template.content,
        'archived': True,
        'service': str(sample_template.service.id),
        'created_by': str(sample_template.created_by.id)
    }

    json_data = json.dumps(data)

    auth_header = create_admin_authorization_header()

    resp = client.post(
        '/service/{}/template/{}'.format(sample_template.service.id, sample_template.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=json_data
    )

    assert resp.status_code == 200
    assert Template.query.first().archived


def test_should_be_able_to_archive_template_should_remove_template_folders(
        client, sample_service
):
    template_folder = create_template_folder(service=sample_service)
    template = create_template(service=sample_service, folder=template_folder)

    data = {
        'archived': True,
    }

    client.post(
        f'/service/{sample_service.id}/template/{template.id}',
        headers=[('Content-Type', 'application/json'),  create_admin_authorization_header()],
        data=json.dumps(data)
    )

    updated_template = Template.query.get(template.id)
    assert updated_template.archived
    assert not updated_template.folder


def test_should_be_able_to_get_all_templates_for_a_service(client, sample_user, sample_service):
    data = {
        'name': 'my template 1',
        'template_type': EMAIL_TYPE,
        'subject': 'subject 1',
        'content': 'template content',
        'service': str(sample_service.id),
        'created_by': str(sample_user.id)
    }
    data_1 = json.dumps(data)
    data = {
        'name': 'my template 2',
        'template_type': EMAIL_TYPE,
        'subject': 'subject 2',
        'content': 'template content',
        'service': str(sample_service.id),
        'created_by': str(sample_user.id)
    }
    data_2 = json.dumps(data)
    auth_header = create_admin_authorization_header()
    client.post(
        '/service/{}/template'.format(sample_service.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data_1
    )
    auth_header = create_admin_authorization_header()

    client.post(
        '/service/{}/template'.format(sample_service.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data_2
    )

    auth_header = create_admin_authorization_header()

    response = client.get(
        '/service/{}/template'.format(sample_service.id),
        headers=[auth_header]
    )

    assert response.status_code == 200
    update_json_resp = json.loads(response.get_data(as_text=True))
    assert update_json_resp['data'][0]['name'] == 'my template 1'
    assert update_json_resp['data'][0]['version'] == 1
    assert update_json_resp['data'][0]['created_at']
    assert update_json_resp['data'][1]['name'] == 'my template 2'
    assert update_json_resp['data'][1]['version'] == 1
    assert update_json_resp['data'][1]['created_at']


def test_should_get_only_templates_for_that_service(admin_request, notify_db_session):
    service_1 = create_service(service_name='service_1')
    service_2 = create_service(service_name='service_2')
    id_1 = create_template(service_1).id
    id_2 = create_template(service_1).id
    id_3 = create_template(service_2).id

    json_resp_1 = admin_request.get('template.get_all_templates_for_service', service_id=service_1.id)
    json_resp_2 = admin_request.get('template.get_all_templates_for_service', service_id=service_2.id)

    assert {template['id'] for template in json_resp_1['data']} == {str(id_1), str(id_2)}
    assert {template['id'] for template in json_resp_2['data']} == {str(id_3)}


@pytest.mark.parametrize('extra_args', (
    {},
    {'detailed': True},
    {'detailed': 'True'},
))
def test_should_get_return_all_fields_by_default(
    admin_request,
    sample_email_template,
    extra_args,
):
    json_response = admin_request.get(
        'template.get_all_templates_for_service',
        service_id=sample_email_template.service.id,
        **extra_args
    )
    assert json_response['data'][0].keys() == {
        'archived',
        'content',
        'created_at',
        'created_by',
        'folder',
        'hidden',
        'id',
        'name',
        'process_type',
        'redact_personalisation',
        'reply_to',
        'reply_to_text',
        'service',
        'subject',
        'template_redacted',
        'template_type',
        'updated_at',
        'version',
    }


@pytest.mark.parametrize('extra_args', (
    {'detailed': False},
    {'detailed': 'False'},
))
@pytest.mark.parametrize('template_type, expected_content', (
    (EMAIL_TYPE, None),
    (SMS_TYPE, None),
))
def test_should_not_return_content_and_subject_if_requested(
    admin_request,
    sample_service,
    extra_args,
    template_type,
    expected_content,
):
    create_template(
        sample_service,
        template_type=template_type,
        content='This is a test',
    )
    json_response = admin_request.get(
        'template.get_all_templates_for_service',
        service_id=sample_service.id,
        **extra_args
    )
    assert json_response['data'][0].keys() == {
        'content',
        'folder',
        'id',
        'name',
        'template_type',
    }
    assert json_response['data'][0]['content'] == expected_content


@pytest.mark.parametrize(
    "subject, content, template_type", [
        (
            'about your ((thing))',
            'hello ((name)) we’ve received your ((thing))',
            EMAIL_TYPE
        ),
        (
            None,
            'hello ((name)) we’ve received your ((thing))',
            SMS_TYPE
        )
    ]
)
def test_should_get_a_single_template(
    client,
    sample_user,
    sample_service,
    subject,
    content,
    template_type
):
    template = create_template(sample_service, template_type=template_type, subject=subject, content=content)

    response = client.get(
        '/service/{}/template/{}'.format(sample_service.id, template.id),
        headers=[create_admin_authorization_header()]
    )

    data = json.loads(response.get_data(as_text=True))['data']

    assert response.status_code == 200
    assert data['content'] == content
    assert data['subject'] == subject
    assert data['process_type'] == 'normal'
    assert not data['redact_personalisation']


@pytest.mark.parametrize(
    "subject, content, path, expected_subject, expected_content, expected_error", [
        (
            'about your thing',
            'hello user we’ve received your thing',
            '/service/{}/template/{}/preview',
            'about your thing',
            'hello user we’ve received your thing',
            None
        ),
        (
            'about your ((thing))',
            'hello ((name)) we’ve received your ((thing))',
            '/service/{}/template/{}/preview?name=Amala&thing=document',
            'about your document',
            'hello Amala we’ve received your document',
            None
        ),
        (
            'about your ((thing))',
            'hello ((name)) we’ve received your ((thing))',
            '/service/{}/template/{}/preview?eman=Amala&gniht=document',
            None, None,
            'Missing personalisation: thing, name'
        ),
        (
            'about your ((thing))',
            'hello ((name)) we’ve received your ((thing))',
            '/service/{}/template/{}/preview?name=Amala&thing=document&foo=bar',
            'about your document',
            'hello Amala we’ve received your document',
            None,
        )
    ]
)
def test_should_preview_a_single_template(
    client,
    sample_service,
    subject,
    content,
    path,
    expected_subject,
    expected_content,
    expected_error
):
    template = create_template(sample_service, template_type=EMAIL_TYPE, subject=subject, content=content)

    response = client.get(
        path.format(sample_service.id, template.id),
        headers=[create_admin_authorization_header()]
    )

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

    if expected_error:
        assert response.status_code == 400
        assert content['message']['template'] == [expected_error]
    else:
        assert response.status_code == 200
        assert content['content'] == expected_content
        assert content['subject'] == expected_subject


def test_should_return_empty_array_if_no_templates_for_service(client, sample_service):

    auth_header = create_admin_authorization_header()

    response = client.get(
        '/service/{}/template'.format(sample_service.id),
        headers=[auth_header]
    )

    assert response.status_code == 200
    json_resp = json.loads(response.get_data(as_text=True))
    assert len(json_resp['data']) == 0


def test_should_return_404_if_no_templates_for_service_with_id(client, sample_service, fake_uuid):

    auth_header = create_admin_authorization_header()

    response = client.get(
        '/service/{}/template/{}'.format(sample_service.id, fake_uuid),
        headers=[auth_header]
    )

    assert response.status_code == 404
    json_resp = json.loads(response.get_data(as_text=True))
    assert json_resp['result'] == 'error'
    assert json_resp['message'] == 'No result found'


@pytest.mark.parametrize('template_type', (
    SMS_TYPE,
))
def test_create_400_for_over_limit_content(
    client,
    notify_api,
    sample_user,
    fake_uuid,
    template_type,
):
    sample_service = create_service(service_permissions=[template_type])
    content = ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(SMS_CHAR_COUNT_LIMIT + 1))
    data = {
        'name': 'too big template',
        'template_type': template_type,
        'content': content,
        'service': str(sample_service.id),
        'created_by': str(sample_service.created_by.id)
    }
    data = json.dumps(data)
    auth_header = create_admin_authorization_header()

    response = client.post(
        '/service/{}/template'.format(sample_service.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=data
    )
    assert response.status_code == 400
    json_resp = json.loads(response.get_data(as_text=True))
    assert (
        'Content has a character count greater than the limit of {}'
    ).format(SMS_CHAR_COUNT_LIMIT) in json_resp['message']['content']


def test_update_400_for_over_limit_content(client, notify_api, sample_user, sample_template):
    json_data = json.dumps({
        'content': ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(
            SMS_CHAR_COUNT_LIMIT + 1)),
        'created_by': str(sample_user.id)
    })
    auth_header = create_admin_authorization_header()
    resp = client.post(
        '/service/{}/template/{}'.format(sample_template.service.id, sample_template.id),
        headers=[('Content-Type', 'application/json'), auth_header],
        data=json_data
    )
    assert resp.status_code == 400
    json_resp = json.loads(resp.get_data(as_text=True))
    assert (
        'Content has a character count greater than the limit of {}'
    ).format(SMS_CHAR_COUNT_LIMIT) in json_resp['message']['content']


def test_should_return_all_template_versions_for_service_and_template_id(client, sample_template):
    original_content = sample_template.content
    from app.dao.templates_dao import dao_update_template
    sample_template.content = original_content + '1'
    dao_update_template(sample_template)
    sample_template.content = original_content + '2'
    dao_update_template(sample_template)

    auth_header = create_admin_authorization_header()
    resp = client.get('/service/{}/template/{}/versions'.format(sample_template.service_id, sample_template.id),
                      headers=[('Content-Type', 'application/json'), auth_header])
    assert resp.status_code == 200
    resp_json = json.loads(resp.get_data(as_text=True))['data']
    assert len(resp_json) == 3
    for x in resp_json:
        if x['version'] == 1:
            assert x['content'] == original_content
        elif x['version'] == 2:
            assert x['content'] == original_content + '1'
        else:
            assert x['content'] == original_content + '2'


def test_update_does_not_create_new_version_when_there_is_no_change(client, sample_template):

    auth_header = create_admin_authorization_header()
    data = {
        'template_type': sample_template.template_type,
        'content': sample_template.content,
    }
    resp = client.post('/service/{}/template/{}'.format(sample_template.service_id, sample_template.id),
                       data=json.dumps(data),
                       headers=[('Content-Type', 'application/json'), auth_header])
    assert resp.status_code == 200

    template = dao_get_template_by_id(sample_template.id)
    assert template.version == 1


def test_update_set_process_type_on_template(client, sample_template):
    auth_header = create_admin_authorization_header()
    data = {
        'process_type': 'priority'
    }
    resp = client.post('/service/{}/template/{}'.format(sample_template.service_id, sample_template.id),
                       data=json.dumps(data),
                       headers=[('Content-Type', 'application/json'), auth_header])
    assert resp.status_code == 200

    template = dao_get_template_by_id(sample_template.id)
    assert template.process_type == 'priority'


@pytest.mark.parametrize('post_data, expected_errors', [
    (
        {},
        [
            {"error": "ValidationError", "message": "subject is a required property"},
            {"error": "ValidationError", "message": "name is a required property"},
            {"error": "ValidationError", "message": "template_type is a required property"},
            {"error": "ValidationError", "message": "content is a required property"},
            {"error": "ValidationError", "message": "service is a required property"},
            {"error": "ValidationError", "message": "created_by is a required property"},
        ]
    )
])
def test_create_template_validates_against_json_schema(
    admin_request,
    sample_service_full_permissions,
    post_data,
    expected_errors,
):
    response = admin_request.post(
        'template.create_template',
        service_id=sample_service_full_permissions.id,
        _data=post_data,
        _expected_status=400
    )
    assert response['errors'] == expected_errors


def test_update_redact_template(admin_request, sample_template):
    assert sample_template.redact_personalisation is False

    data = {
        'redact_personalisation': True,
        'created_by': str(sample_template.created_by_id)
    }

    dt = datetime.now()

    with freeze_time(dt):
        resp = admin_request.post(
            'template.update_template',
            service_id=sample_template.service_id,
            template_id=sample_template.id,
            _data=data
        )

    assert resp is None

    assert sample_template.redact_personalisation is True
    assert sample_template.template_redacted.updated_by_id == sample_template.created_by_id
    assert sample_template.template_redacted.updated_at == dt

    assert sample_template.version == 1


def test_update_redact_template_ignores_other_properties(admin_request, sample_template):
    data = {
        'name': 'Foo',
        'redact_personalisation': True,
        'created_by': str(sample_template.created_by_id)
    }

    admin_request.post(
        'template.update_template',
        service_id=sample_template.service_id,
        template_id=sample_template.id,
        _data=data
    )

    assert sample_template.redact_personalisation is True
    assert sample_template.name != 'Foo'


def test_update_redact_template_does_nothing_if_already_redacted(admin_request, sample_template):
    dt = datetime.now()
    with freeze_time(dt):
        dao_redact_template(sample_template, sample_template.created_by_id)

    data = {
        'redact_personalisation': True,
        'created_by': str(sample_template.created_by_id)
    }

    with freeze_time(dt + timedelta(days=1)):
        resp = admin_request.post(
            'template.update_template',
            service_id=sample_template.service_id,
            template_id=sample_template.id,
            _data=data
        )

    assert resp is None

    assert sample_template.redact_personalisation is True
    # make sure that it hasn't been updated
    assert sample_template.template_redacted.updated_at == dt


def test_update_redact_template_400s_if_no_created_by(admin_request, sample_template):
    original_updated_time = sample_template.template_redacted.updated_at
    resp = admin_request.post(
        'template.update_template',
        service_id=sample_template.service_id,
        template_id=sample_template.id,
        _data={'redact_personalisation': True},
        _expected_status=400
    )

    assert resp == {
        'result': 'error',
        'message': {'created_by': ['Field is required']}
    }

    assert sample_template.redact_personalisation is False
    assert sample_template.template_redacted.updated_at == original_updated_time
