# Copyright 2017, Google Inc. 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.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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.

"""System tests for Vision API."""

import functools
import io
import os
import unittest

import six

from google.cloud import exceptions
from google.cloud import storage
from google.cloud import vision

from test_utils.retry import RetryErrors
from test_utils.retry import RetryResult
from test_utils.system import unique_resource_id


_SYS_TESTS_DIR = os.path.realpath(os.path.dirname(__file__))
LOGO_FILE = os.path.join(_SYS_TESTS_DIR, 'data', 'logo.png')
FACE_FILE = os.path.join(_SYS_TESTS_DIR, 'data', 'faces.jpg')
LABEL_FILE = os.path.join(_SYS_TESTS_DIR, 'data', 'car.jpg')
LANDMARK_FILE = os.path.join(_SYS_TESTS_DIR, 'data', 'landmark.jpg')
TEXT_FILE = os.path.join(_SYS_TESTS_DIR, 'data', 'text.jpg')
FULL_TEXT_FILE = os.path.join(_SYS_TESTS_DIR, 'data', 'full-text.jpg')


class VisionSystemTestBase(unittest.TestCase):
    client = None
    test_bucket = None

    def setUp(self):
        self.to_delete_by_case = []

    def tearDown(self):
        for value in self.to_delete_by_case:
            value.delete()


def setUpModule():
    VisionSystemTestBase.client = vision.ImageAnnotatorClient()
    storage_client = storage.Client()
    bucket_name = 'new' + unique_resource_id()
    VisionSystemTestBase.test_bucket = storage_client.bucket(bucket_name)

    # 429 Too Many Requests in case API requests rate-limited.
    retry_429 = RetryErrors(exceptions.TooManyRequests)
    retry_429(VisionSystemTestBase.test_bucket.create)()


def tearDownModule():
    # 409 Conflict if the bucket is full.
    # 429 Too Many Requests in case API requests rate-limited.
    bucket_retry = RetryErrors(
        (exceptions.TooManyRequests, exceptions.Conflict),
    )
    bucket_retry(VisionSystemTestBase.test_bucket.delete)(force=True)


class TestVisionClientLogo(VisionSystemTestBase):
    def test_detect_logos_content(self):
        # Read the file.
        with io.open(LOGO_FILE, 'rb') as image_file:
            content = image_file.read()

        # Make the request.
        response = self.client.logo_detection({
            'content': content,
        })

        # Check to ensure we got what we expect.
        assert len(response.logo_annotations) == 1
        assert response.logo_annotations[0].description == 'Google'

    def test_detect_logos_file_handler(self):
        # Get a file handler, and make the request using it.
        with io.open(LOGO_FILE, 'rb') as image_file:
            response = self.client.logo_detection(image_file)

        # Check to ensure we got what we expect.
        assert len(response.logo_annotations) == 1
        assert response.logo_annotations[0].description == 'Google'

    def test_detect_logos_filename(self):
        # Make the request with the filename directly.
        response = self.client.logo_detection({
            'source': {'filename': LOGO_FILE},
        })

        # Check to ensure we got what we expect.
        assert len(response.logo_annotations) == 1
        assert response.logo_annotations[0].description == 'Google'

    def test_detect_logos_gcs(self):
        # Upload the image to Google Cloud Storage.
        blob_name = 'logo.png'
        blob = self.test_bucket.blob(blob_name)
        self.to_delete_by_case.append(blob)
        with io.open(LOGO_FILE, 'rb') as image_file:
            blob.upload_from_file(image_file)

        # Make the request.
        response = self.client.logo_detection({
            'source': {'image_uri': 'gs://{bucket}/{blob}'.format(
                bucket=self.test_bucket.name,
                blob=blob_name,
            )},
        })

        # Check the response.
        assert len(response.logo_annotations) == 1
        assert response.logo_annotations[0].description == 'Google'
