# Copyright 2016 Google LLC
#
# 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.

from __future__ import absolute_import

import os
import sys

import nox


LOCAL_DEPS = (
    os.path.join('..', 'api_core'),
    os.path.join('..', 'core'),
)
UNIT_TEST_DEPS = (
    'mock',
    'pytest',
    'pytest-cov',
    'flask',
    'webapp2',
    'webob',
)


@nox.session(python="3.7")
def lint(session):
    """Run linters.

    Returns a failure if the linters find linting errors or sufficiently
    serious code quality issues.
    """
    session.install("flake8", "black", *LOCAL_DEPS)
    session.run(
        "black",
        "--check",
        "google",
        "tests",
        "docs",
    )
    session.run("flake8", "google", "tests")


@nox.session(python="3.6")
def blacken(session):
    """Run black.

    Format code to uniform standard.
    """
    session.install("black")
    session.run(
        "black",
        "google",
        "tests",
        "docs",
    )


@nox.session(python="3.7")
def lint_setup_py(session):
    """Verify that setup.py is valid (including RST check)."""
    session.install("docutils", "pygments")
    session.run("python", "setup.py", "check", "--restructuredtext", "--strict")


def default(session, django_dep=('django',)):
    """Default unit test session.
    """

    # Install all test dependencies, then install this package in-place.
    deps = UNIT_TEST_DEPS
    deps += django_dep

    session.install(*deps)
    for local_dep in LOCAL_DEPS:
        session.install('-e', local_dep)
    session.install('-e', '.')

    # Run py.test against the unit tests.
    session.run(
        'py.test',
        '--quiet',
        '--cov=google.cloud.logging',
        '--cov=tests.unit',
        '--cov-append',
        '--cov-config=.coveragerc',
        '--cov-report=',
        '--cov-fail-under=97',
        'tests/unit',
        *session.posargs
    )


@nox.session(python=['2.7', '3.5', '3.6', '3.7'])
def unit(session):
    """Run the unit test suite."""

    # Testing multiple version of django
    # See https://www.djangoproject.com/download/ for supported version
    django_deps_27 = [
        ('django==1.8.19',),
        ('django >= 1.11.0, < 2.0.0dev',),
    ]

    if session.virtualenv.interpreter == '2.7':
        [default(session, django_dep=django) for django in django_deps_27]
    else:
        default(session)


@nox.session(python=['2.7', '3.6'])
def system(session):
    """Run the system test suite."""

    # Sanity check: Only run system tests if the environment variable is set.
    if not os.environ.get('GOOGLE_APPLICATION_CREDENTIALS', ''):
        session.skip('Credentials must be set via environment variable.')

    # Use pre-release gRPC for system tests.
    session.install('--pre', 'grpcio')

    # Install all test dependencies, then install this package into the
    # virtualenv's dist-packages.
    session.install('mock', 'pytest')
    for local_dep in LOCAL_DEPS:
        session.install('-e', local_dep)
    systest_deps = [
        '../bigquery/',
        '../pubsub/',
        '../storage/',
        '../test_utils/',
    ]
    for systest_dep in systest_deps:
        session.install('-e', systest_dep)
    session.install('-e', '.')

    # Run py.test against the system tests.
    session.run(
        'py.test',
        '-vvv',
        '-s',
        'tests/system',
        *session.posargs)


@nox.session(python="3.7")
def cover(session):
    """Run the final coverage report.

    This outputs the coverage report aggregating coverage from the unit
    test runs (not system test runs), and then erases coverage data.
    """
    session.install("coverage", "pytest-cov")
    session.run("coverage", "report", "--show-missing", "--fail-under=100")

    session.run("coverage", "erase")
