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

import os
import shutil
import pytest

from buildstream import _yaml
from buildstream.testing import cli  # pylint: disable=unused-import

from tests.testutils import create_artifact_share, assert_shared, assert_not_shared


DATA_DIR = os.path.join(
    os.path.dirname(os.path.realpath(__file__)),
    "junctions",
)


def project_set_artifacts(project, url):
    project_conf_file = os.path.join(project, 'project.conf')
    project_config = _yaml.load(project_conf_file)
    project_config['artifacts'] = {
        'url': url,
        'push': True
    }
    _yaml.roundtrip_dump(project_config._strip_node_info(), file=project_conf_file)


@pytest.mark.datafiles(DATA_DIR)
def test_push_pull(cli, tmpdir, datafiles):
    project = os.path.join(str(datafiles), 'parent')
    base_project = os.path.join(str(project), 'base')

    with create_artifact_share(os.path.join(str(tmpdir), 'artifactshare-parent')) as share,\
        create_artifact_share(os.path.join(str(tmpdir), 'artifactshare-base')) as base_share:

        # First build it without the artifact cache configured
        result = cli.run(project=project, args=['build', 'target.bst'])
        assert result.exit_code == 0

        # Assert that we are now cached locally
        state = cli.get_element_state(project, 'target.bst')
        assert state == 'cached'
        state = cli.get_element_state(base_project, 'base-element.bst')
        assert state == 'cached'

        project_set_artifacts(project, share.repo)
        project_set_artifacts(base_project, base_share.repo)

        # Now try bst artifact push
        result = cli.run(project=project, args=['artifact', 'push', '--deps', 'all', 'target.bst'])
        assert result.exit_code == 0

        # And finally assert that the artifacts are in the right shares
        #
        # In the parent project's cache
        assert_shared(cli, share, project, 'target.bst', project_name='parent')
        assert_shared(cli, share, project, 'app.bst', project_name='parent')
        assert_not_shared(cli, share, base_project, 'base-element.bst', project_name='base')

        # In the junction project's cache
        assert_not_shared(cli, base_share, project, 'target.bst', project_name='parent')
        assert_not_shared(cli, base_share, project, 'app.bst', project_name='parent')
        assert_shared(cli, base_share, base_project, 'base-element.bst', project_name='base')

        # Now we've pushed, delete the user's local artifact cache
        # directory and try to redownload it from the share
        #
        cas = os.path.join(cli.directory, 'cas')
        shutil.rmtree(cas)
        artifact_dir = os.path.join(cli.directory, 'artifacts')
        shutil.rmtree(artifact_dir)

        # Assert that nothing is cached locally anymore
        state = cli.get_element_state(project, 'target.bst')
        assert state != 'cached'
        state = cli.get_element_state(base_project, 'base-element.bst')
        assert state != 'cached'

        # Now try bst artifact pull
        result = cli.run(project=project, args=['artifact', 'pull', '--deps', 'all', 'target.bst'])
        assert result.exit_code == 0

        # And assert that they are again in the local cache, without having built
        state = cli.get_element_state(project, 'target.bst')
        assert state == 'cached'
        state = cli.get_element_state(base_project, 'base-element.bst')
        assert state == 'cached'


@pytest.mark.datafiles(DATA_DIR)
def test_caching_junction_elements(cli, tmpdir, datafiles):
    project = os.path.join(str(datafiles), 'parent')
    base_project = os.path.join(str(project), 'base')

    # Load the junction element
    junction_element = os.path.join(project, 'base.bst')
    junction_data = _yaml.roundtrip_load(junction_element)

    # Add the "cache-junction-elements" boolean to the junction Element
    junction_data['config'] = {"cache-junction-elements": True}
    _yaml.roundtrip_dump(junction_data, junction_element)

    with create_artifact_share(os.path.join(str(tmpdir), 'artifactshare-parent')) as share,\
        create_artifact_share(os.path.join(str(tmpdir), 'artifactshare-base')) as base_share:

        # First build it without the artifact cache configured
        result = cli.run(project=project, args=['build', 'target.bst'])
        assert result.exit_code == 0

        # Assert that we are now cached locally
        state = cli.get_element_state(project, 'target.bst')
        assert state == 'cached'
        state = cli.get_element_state(base_project, 'base-element.bst')
        assert state == 'cached'

        project_set_artifacts(project, share.repo)
        project_set_artifacts(base_project, base_share.repo)

        # Now try bst artifact push
        result = cli.run(project=project, args=['artifact', 'push', '--deps', 'all', 'target.bst'])
        assert result.exit_code == 0

        # And finally assert that the artifacts are in the right shares
        #
        # The parent project's cache should *also* contain elements from the junction
        assert_shared(cli, share, project, 'target.bst', project_name='parent')
        assert_shared(cli, share, project, 'app.bst', project_name='parent')
        assert_shared(cli, share, base_project, 'base-element.bst', project_name='base')

        # The junction project's cache should only contain elements in the junction project
        assert_not_shared(cli, base_share, project, 'target.bst', project_name='parent')
        assert_not_shared(cli, base_share, project, 'app.bst', project_name='parent')
        assert_shared(cli, base_share, base_project, 'base-element.bst', project_name='base')


@pytest.mark.datafiles(DATA_DIR)
def test_ignore_junction_remotes(cli, tmpdir, datafiles):
    project = os.path.join(str(datafiles), 'parent')
    base_project = os.path.join(str(project), 'base')

    # Load the junction element
    junction_element = os.path.join(project, 'base.bst')
    junction_data = _yaml.roundtrip_load(junction_element)

    with create_artifact_share(os.path.join(str(tmpdir), 'artifactshare-parent')) as share,\
        create_artifact_share(os.path.join(str(tmpdir), 'artifactshare-base')) as base_share:

        # Immediately declare the artifact caches in the appropriate project configs
        project_set_artifacts(project, share.repo)
        project_set_artifacts(base_project, base_share.repo)

        # Build and populate the project remotes with their respective elements
        result = cli.run(project=project, args=['build', 'target.bst'])
        assert result.exit_code == 0

        # And finally assert that the artifacts are in the right shares
        #
        # The parent project's cache should only contain project elements
        assert_shared(cli, share, project, 'target.bst', project_name='parent')
        assert_shared(cli, share, project, 'app.bst', project_name='parent')
        assert_not_shared(cli, share, base_project, 'base-element.bst', project_name='base')

        # The junction project's cache should only contain elements in the junction project
        assert_not_shared(cli, base_share, project, 'target.bst', project_name='parent')
        assert_not_shared(cli, base_share, project, 'app.bst', project_name='parent')
        assert_shared(cli, base_share, base_project, 'base-element.bst', project_name='base')

        # Ensure that, from now on, we ignore junction element remotes
        junction_data['config'] = {"ignore-junction-remotes": True}
        _yaml.roundtrip_dump(junction_data, junction_element)

        # Now delete everything from the local cache and try to
        # redownload from the shares.
        #
        cas = os.path.join(cli.directory, 'cas')
        shutil.rmtree(cas)
        artifact_dir = os.path.join(cli.directory, 'artifacts')
        shutil.rmtree(artifact_dir)

        # Assert that nothing is cached locally anymore
        state = cli.get_element_state(project, 'target.bst')
        assert state != 'cached'
        state = cli.get_element_state(base_project, 'base-element.bst')
        assert state != 'cached'

        # Now try bst artifact pull
        result = cli.run(project=project, args=['artifact', 'pull', '--deps', 'all', 'target.bst'])
        assert result.exit_code == 0

        # And assert that they are again in the local cache, without having built
        state = cli.get_element_state(project, 'target.bst')
        assert state == 'cached'
        # We shouldn't be able to download base-element!
        state = cli.get_element_state(base_project, 'base-element.bst')
        assert state != 'cached'