import ast
import pytest
import shutil
import tarfile

from pathlib import Path

from poetry import Poetry
from poetry.io import NullIO
from poetry.masonry.builders.sdist import SdistBuilder
from poetry.utils.venv import NullVenv

from tests.helpers import get_dependency


fixtures_dir = Path(__file__).parent / 'fixtures'


@pytest.fixture(autouse=True)
def setup():
    clear_samples_dist()

    yield

    clear_samples_dist()


def clear_samples_dist():
    for dist in fixtures_dir.glob('**/dist'):
        if dist.is_dir():
            shutil.rmtree(str(dist))


def project(name):
    return Path(__file__).parent / 'fixtures' / name


def test_convert_dependencies():
    result = SdistBuilder.convert_dependencies([
        get_dependency('A', '^1.0'),
        get_dependency('B', '~1.0'),
        get_dependency('C', '1.2.3'),
    ])
    main = [
        'A (>=1.0.0.0,<2.0.0.0)',
        'B (>=1.0.0.0,<1.1.0.0)',
        'C (==1.2.3.0)',
    ]
    extras = []

    assert result == (main, extras)

    dependency_with_python = get_dependency('A', '^1.0')
    dependency_with_python.python_versions = '^3.4'

    result = SdistBuilder.convert_dependencies([
        dependency_with_python,
        get_dependency('B', '~1.0'),
        get_dependency('C', '1.2.3'),
    ])
    main = [
        'B (>=1.0.0.0,<1.1.0.0)',
        'C (==1.2.3.0)',
    ]
    extras = [
        'A (>=1.0.0.0,<2.0.0.0); python_version>="3.4.0.0" and python_version<"4.0.0.0"',
    ]

    assert result == (main, extras)


def test_make_setup():
    poetry = Poetry.create(project('complete'))

    builder = SdistBuilder(poetry, NullVenv(), NullIO())
    setup = builder.build_setup()
    setup_ast = ast.parse(setup)

    setup_ast.body = [n for n in setup_ast.body if isinstance(n, ast.Assign)]
    ns = {}
    exec(compile(setup_ast, filename="setup.py", mode="exec"), ns)
    assert ns['packages'] == [
        'my_package',
        'my_package.sub_pkg1',
        'my_package.sub_pkg2'
    ]
    assert ns['install_requires'] == [
        'cleo (>=0.6.0.0,<0.7.0.0)'
    ]
    assert ns['entry_points'] == {
        'console_scripts': [
            'my-script = my_package:main',
            'my-2nd-script = my_package:main2',
        ]
    }


def test_find_files_to_add():
    poetry = Poetry.create(project('complete'))

    builder = SdistBuilder(poetry, NullVenv(), NullIO())
    result = builder.find_files_to_add()

    assert result == [
        Path('README.rst'),
        Path('my_package/__init__.py'),
        Path('my_package/data1/test.json'),
        Path('my_package/sub_pkg1/__init__.py'),
        Path('my_package/sub_pkg2/__init__.py'),
        Path('my_package/sub_pkg2/data2/data.json'),
        Path('pyproject.toml'),
    ]


def test_package():
    poetry = Poetry.create(project('complete'))

    builder = SdistBuilder(poetry, NullVenv(), NullIO())
    builder.build()

    sdist = fixtures_dir / 'complete' / 'dist' / 'my-package-1.2.3.tar.gz'

    assert sdist.exists()


def test_prelease():
    poetry = Poetry.create(project('prerelease'))

    builder = SdistBuilder(poetry, NullVenv(), NullIO())
    builder.build()

    sdist = fixtures_dir / 'prerelease' / 'dist' / 'prerelease-0.1b1.tar.gz'

    assert sdist.exists()


def test_with_c_extensions():
    poetry = Poetry.create(project('extended'))

    builder = SdistBuilder(poetry, NullVenv(), NullIO())
    builder.build()

    sdist = fixtures_dir / 'extended' / 'dist' / 'extended-0.1.tar.gz'

    assert sdist.exists()

    tar = tarfile.open(str(sdist), 'r')

    assert 'extended-0.1/build.py' in tar.getnames()
    assert 'extended-0.1/extended/extended.c' in tar.getnames()

