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

import os
import pytest

from buildstream import _yaml
from buildstream._exceptions import ErrorDomain, LoadErrorReason
from buildstream.testing import cli  # pylint: disable=unused-import
from buildstream.testing._utils.site import HAVE_SANDBOX
from tests.testutils import filetypegenerator

DATA_DIR = os.path.join(
    os.path.dirname(os.path.realpath(__file__)),
    'local',
)


@pytest.mark.datafiles(os.path.join(DATA_DIR, 'basic'))
def test_missing_path(cli, datafiles):
    project = str(datafiles)

    # Removing the local file causes preflight to fail
    localfile = os.path.join(project, 'file.txt')
    os.remove(localfile)

    result = cli.run(project=project, args=[
        'show', 'target.bst'
    ])
    result.assert_main_error(ErrorDomain.LOAD, LoadErrorReason.MISSING_FILE)


@pytest.mark.datafiles(os.path.join(DATA_DIR, 'basic'))
def test_non_regular_file_or_directory(cli, datafiles):
    project = str(datafiles)
    localfile = os.path.join(project, 'file.txt')

    for _file_type in filetypegenerator.generate_file_types(localfile):
        result = cli.run(project=project, args=[
            'show', 'target.bst'
        ])
        if os.path.isdir(localfile) and not os.path.islink(localfile):
            result.assert_success()
        elif os.path.isfile(localfile) and not os.path.islink(localfile):
            result.assert_success()
        else:
            result.assert_main_error(ErrorDomain.LOAD,
                                     LoadErrorReason.PROJ_PATH_INVALID_KIND)


@pytest.mark.datafiles(os.path.join(DATA_DIR, 'basic'))
def test_invalid_absolute_path(cli, datafiles):
    project = str(datafiles)

    with open(os.path.join(project, "target.bst"), 'r') as f:
        old_yaml = f.read()

    new_yaml = old_yaml.replace("file.txt", os.path.join(project, "file.txt"))
    assert old_yaml != new_yaml

    with open(os.path.join(project, "target.bst"), 'w') as f:
        f.write(new_yaml)

    result = cli.run(project=project, args=['show', 'target.bst'])
    result.assert_main_error(ErrorDomain.LOAD,
                             LoadErrorReason.PROJ_PATH_INVALID)


@pytest.mark.datafiles(os.path.join(DATA_DIR, 'invalid-relative-path'))
def test_invalid_relative_path(cli, datafiles):
    project = str(datafiles)

    result = cli.run(project=project, args=['show', 'target.bst'])
    result.assert_main_error(ErrorDomain.LOAD,
                             LoadErrorReason.PROJ_PATH_INVALID)


@pytest.mark.datafiles(os.path.join(DATA_DIR, 'basic'))
def test_stage_file(cli, tmpdir, datafiles):
    project = str(datafiles)
    checkoutdir = os.path.join(str(tmpdir), "checkout")

    # Build, checkout
    result = cli.run(project=project, args=['build', 'target.bst'])
    result.assert_success()
    result = cli.run(project=project, args=['artifact', 'checkout', 'target.bst', '--directory', checkoutdir])
    result.assert_success()

    # Check that the checkout contains the expected file
    assert os.path.exists(os.path.join(checkoutdir, 'file.txt'))


@pytest.mark.datafiles(os.path.join(DATA_DIR, 'directory'))
def test_stage_directory(cli, tmpdir, datafiles):
    project = str(datafiles)
    checkoutdir = os.path.join(str(tmpdir), "checkout")

    # Build, checkout
    result = cli.run(project=project, args=['build', 'target.bst'])
    result.assert_success()
    result = cli.run(project=project, args=['artifact', 'checkout', 'target.bst', '--directory', checkoutdir])
    result.assert_success()

    # Check that the checkout contains the expected file and directory and other file
    assert os.path.exists(os.path.join(checkoutdir, 'file.txt'))
    assert os.path.exists(os.path.join(checkoutdir, 'subdir', 'anotherfile.txt'))


@pytest.mark.datafiles(os.path.join(DATA_DIR, 'symlink'))
def test_stage_symlink(cli, tmpdir, datafiles):

    project = str(datafiles)
    checkoutdir = os.path.join(str(tmpdir), "checkout")

    # Workaround datafiles bug:
    #
    #   https://github.com/omarkohl/pytest-datafiles/issues/1
    #
    # Create the symlink by hand.
    symlink = os.path.join(project, 'files', 'symlink-to-file.txt')
    os.symlink('file.txt', symlink)

    # Build, checkout
    result = cli.run(project=project, args=['build', 'target.bst'])
    result.assert_success()
    result = cli.run(project=project, args=['artifact', 'checkout', 'target.bst', '--directory', checkoutdir])
    result.assert_success()

    # Check that the checkout contains the expected file and directory and other file
    assert os.path.exists(os.path.join(checkoutdir, 'file.txt'))
    assert os.path.exists(os.path.join(checkoutdir, 'symlink-to-file.txt'))
    assert os.path.islink(os.path.join(checkoutdir, 'symlink-to-file.txt'))


@pytest.mark.datafiles(os.path.join(DATA_DIR, 'file-exists'))
def test_stage_file_exists(cli, datafiles):
    project = str(datafiles)

    # Build, checkout
    result = cli.run(project=project, args=['build', 'target.bst'])
    result.assert_main_error(ErrorDomain.STREAM, None)
    result.assert_task_error(ErrorDomain.ELEMENT, "import-source-files-fail")


@pytest.mark.datafiles(os.path.join(DATA_DIR, 'directory'))
def test_stage_directory_symlink(cli, tmpdir, datafiles):
    project = str(datafiles)
    checkoutdir = os.path.join(str(tmpdir), "checkout")

    symlink = os.path.join(project, 'files', 'symlink-to-subdir')
    os.symlink('subdir', symlink)

    # Build, checkout
    result = cli.run(project=project, args=['build', 'target.bst'])
    result.assert_success()
    result = cli.run(project=project, args=['artifact', 'checkout', 'target.bst', '--directory', checkoutdir])
    result.assert_success()

    # Check that the checkout contains the expected directory and directory symlink
    assert os.path.exists(os.path.join(checkoutdir, 'subdir', 'anotherfile.txt'))
    assert os.path.exists(os.path.join(checkoutdir, 'symlink-to-subdir', 'anotherfile.txt'))
    assert os.path.islink(os.path.join(checkoutdir, 'symlink-to-subdir'))


@pytest.mark.integration
@pytest.mark.datafiles(os.path.join(DATA_DIR, 'deterministic-umask'))
@pytest.mark.skipif(not HAVE_SANDBOX, reason='Only available with a functioning sandbox')
def test_deterministic_source_umask(cli, tmpdir, datafiles):

    def create_test_file(*path, mode=0o644, content='content\n'):
        path = os.path.join(*path)
        os.makedirs(os.path.dirname(path), exist_ok=True)
        with open(path, 'w') as f:
            f.write(content)
            os.fchmod(f.fileno(), mode)

    def create_test_directory(*path, mode=0o644):
        create_test_file(*path, '.keep', content='')
        path = os.path.join(*path)
        os.chmod(path, mode)

    project = str(datafiles)
    element_name = 'list.bst'
    element_path = os.path.join(project, 'elements', element_name)
    sourcedir = os.path.join(project, 'source')

    create_test_file(sourcedir, 'a.txt', mode=0o700)
    create_test_file(sourcedir, 'b.txt', mode=0o755)
    create_test_file(sourcedir, 'c.txt', mode=0o600)
    create_test_file(sourcedir, 'd.txt', mode=0o400)
    create_test_file(sourcedir, 'e.txt', mode=0o644)
    create_test_file(sourcedir, 'f.txt', mode=0o4755)
    create_test_file(sourcedir, 'g.txt', mode=0o2755)
    create_test_file(sourcedir, 'h.txt', mode=0o1755)
    create_test_directory(sourcedir, 'dir-a', mode=0o0700)
    create_test_directory(sourcedir, 'dir-c', mode=0o0755)
    create_test_directory(sourcedir, 'dir-d', mode=0o4755)
    create_test_directory(sourcedir, 'dir-e', mode=0o2755)
    create_test_directory(sourcedir, 'dir-f', mode=0o1755)

    source = {'kind': 'local',
              'path': 'source'}
    element = {
        'kind': 'manual',
        'depends': [
            {
                'filename': 'base.bst',
                'type': 'build'
            }
        ],
        'sources': [
            source
        ],
        'config': {
            'install-commands': [
                'ls -l >"%{install-root}/ls-l"'
            ]
        }
    }
    _yaml.roundtrip_dump(element, element_path)