# Copyright 2018-2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
#     http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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.
from __future__ import absolute_import

import json

from mock import patch, PropertyMock
import pytest
from six.moves import http_client, range

from sagemaker_containers import _content_types, _worker


class Transformer(object):
    def __init__(self):
        self.calls = dict(initialize=0, transform=0)

    def initialize(self):
        self.calls["initialize"] += 1

    def transform(self):
        self.calls["transform"] += 1
        return _worker.Response(response=json.dumps(self.calls), mimetype=_content_types.JSON)


def test_worker_with_initialize():
    transformer = Transformer()

    with _worker.Worker(
        transform_fn=transformer.transform,
        initialize_fn=transformer.initialize,
        module_name="worker_with_initialize",
    ).test_client() as client:
        assert client.application.import_name == "worker_with_initialize"

        assert client.get("/ping").status_code == http_client.OK

        for _ in range(9):
            response = client.post("/invocations")
            assert response.status_code == http_client.OK

        response = client.post("/invocations")
        assert response.mimetype == _content_types.JSON
        assert json.loads(response.get_data(as_text=True)) == dict(initialize=1, transform=10)


@patch(
    "sagemaker_containers._env.ServingEnv.module_name", PropertyMock(return_value="user_program")
)
@pytest.mark.parametrize(
    "module_name,expected_name", [("my_module", "my_module"), (None, "user_program")]
)
def test_worker(module_name, expected_name):
    transformer = Transformer()

    with _worker.Worker(
        transform_fn=transformer.transform, module_name=module_name
    ).test_client() as client:
        assert client.application.import_name == expected_name

        assert client.get("/ping").status_code == http_client.OK

        for _ in range(9):
            response = client.post("/invocations")
            assert response.status_code == http_client.OK

        response = client.post("/invocations")
        assert response.mimetype == _content_types.JSON
        assert json.loads(response.get_data(as_text=True)) == dict(initialize=0, transform=10)


def test_worker_with_custom_ping():
    transformer = Transformer()

    def custom_ping():
        return "ping", http_client.ACCEPTED

    with _worker.Worker(
        transform_fn=transformer.transform, healthcheck_fn=custom_ping, module_name="custom_ping"
    ).test_client() as client:
        response = client.get("/ping")
        assert response.status_code == http_client.ACCEPTED
        assert response.get_data(as_text=True) == "ping"