#
#  Copyright (C) 2019 Bloomberg Finance LP
#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU Lesser General Public
#  License as published by the Free Software Foundation; either
#  version 2 of the License, or (at your option) any later version.
#
#  This library is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
#  Lesser General Public License for more details.
#
#  You should have received a copy of the GNU Lesser General Public
#  License along with this library. If not, see <http://www.gnu.org/licenses/>.
#

# Pylint doesn't play well with fixtures and dependency injection from pytest
# pylint: disable=redefined-outer-name

import os
import pytest
from buildstream.testing import cli_remote_execution as cli  # pylint: disable=unused-import
from buildstream.testing import create_repo
from buildstream import _yaml
from tests.testutils import generate_junction

pytestmark = pytest.mark.remoteexecution

# Project directory
DATA_DIR = os.path.join(
    os.path.dirname(os.path.realpath(__file__)),
    "project",
)


def configure_project(path, config):
    config['name'] = 'test'
    config['element-path'] = 'elements'
    _yaml.roundtrip_dump(config, os.path.join(path, 'project.conf'))


def create_element(repo, name, path, dependencies, ref=None):
    element = {
        'kind': 'import',
        'sources': [
            repo.source_config(ref=ref)
        ],
        'depends': dependencies
    }
    _yaml.roundtrip_dump(element, os.path.join(path, name))


@pytest.mark.datafiles(DATA_DIR)
def test_junction_build_remote(cli, tmpdir, datafiles):
    project = str(datafiles)
    subproject_path = os.path.join(project, 'files', 'sub-project')
    subproject_element_path = os.path.join(subproject_path, 'elements')
    amhello_files_path = os.path.join(subproject_path, 'files')
    element_path = os.path.join(project, 'elements')
    junction_path = os.path.join(element_path, 'junction.bst')

    # We need a repo for real trackable elements
    repo = create_repo('git', str(tmpdir))
    ref = repo.create(amhello_files_path)

    # ensure that the correct project directory is also listed in the junction
    subproject_conf = os.path.join(subproject_path, 'project.conf')
    with open(subproject_conf) as f:
        config = f.read()
    config = config.format(project_dir=subproject_path)
    with open(subproject_conf, 'w') as f:
        f.write(config)

    # Create a trackable element to depend on the cross junction element,
    # this one has it's ref resolved already
    create_element(repo, 'sub-target.bst', subproject_element_path, ['autotools/amhello.bst'], ref=ref)

    # Create a trackable element to depend on the cross junction element
    create_element(repo, 'target.bst', element_path, [
        {
            'junction': 'junction.bst',
            'filename': 'sub-target.bst'
        }
    ])

    # Create a repo to hold the subproject and generate a junction element for it
    generate_junction(tmpdir, subproject_path, junction_path, store_ref=False)

    # Now create a compose element at the top level
    element = {
        'kind': 'compose',
        'depends': [
            {
                'filename': 'target.bst',
                'type': 'build'
            }
        ]
    }
    _yaml.roundtrip_dump(element, os.path.join(element_path, 'composed.bst'))

    # We're doing remote execution so ensure services are available
    services = cli.ensure_services()
    assert set(services) == set(['action-cache', 'execution', 'storage'])

    # track the junction first to ensure we have refs
    result = cli.run(project=project, args=['source', 'track', 'junction.bst'])
    result.assert_success()

    # Build it with --track-all
    result = cli.run(project=project, silent=True, args=[
        'build', '--track-all', 'composed.bst'])
    result.assert_success()

    # Assert that the main target is cached as a result
    assert cli.get_element_state(project, 'composed.bst') == 'cached'