try:
    import urlparse
except ImportError:
    # python3
    from urllib import parse as urlparse

from unittest import TestCase
from requirements_detector.requirement import DetectedRequirement, _parse_egg_name, _strip_fragment


class TestRequirementParsing(TestCase):

    def _test(self, requirement, name=None, version_specs=None, url=None):
        req = DetectedRequirement.parse(requirement)
        self.assertEqual(name, req.name)
        if version_specs is None:
            self.assertEqual([], req.version_specs)
        else:
            for spec in version_specs:
                self.assertTrue(spec in req.version_specs)
        self.assertEqual(url, req.url)

    def test_basic_requirement(self):
        self._test('Django', 'django')
        self._test('celery', 'celery')

    def test_requirement_with_versions(self):
        self._test('Django==1.5.2', 'django', [('==', '1.5.2')])
        self._test('South>0.8', 'south', [('>', '0.8')])
        self._test('django-gubbins!=1.1.1,>1.1', 'django-gubbins', [('!=', '1.1.1'), ('>', '1.1')])

    def test_relative_file_path(self):
        self._test('../somelib', url='../somelib')

    def test_vcs_url(self):
        self._test('git+ssh://git@github.com/something/somelib.git',
                   url='git+ssh://git@github.com/something/somelib.git')
        self._test('git+ssh://git@github.com/something/somelib.git#egg=somelib',
                   name='somelib', url='git+ssh://git@github.com/something/somelib.git')
        self._test('git://github.com/peeb/django-mollie-ideal.git#egg=mollie',
                   name='mollie', url='git+git://github.com/peeb/django-mollie-ideal.git')

    def test_archive_url(self):
        self._test('http://example.com/somelib.tar.gz', url='http://example.com/somelib.tar.gz')
        self._test('http://example.com/somelib.tar.gz#egg=somelib', name='somelib',
                   url='http://example.com/somelib.tar.gz')

    def test_editable_relative_path(self):
        self._test('-e ../somelib', url='../somelib')

    def test_editable_vcs_url(self):
        self._test('--editable git+ssh://git@github.com/something/somelib.git#egg=somelib',
                   name='somelib', url='git+ssh://git@github.com/something/somelib.git')


class TestEggFragmentParsing(TestCase):

    def test_simple(self):
        self.assertEqual('somelib', _parse_egg_name('egg=somelib'))

    def test_no_egg_value(self):
        self.assertTrue(_parse_egg_name('a=b&c=2') is None)

    def test_no_pairs(self):
        self.assertTrue(_parse_egg_name('somelib') is None)

    def test_first_egg_val(self):
        self.assertEqual('somelib', _parse_egg_name('egg=somelib&egg=anotherlib'))

    def test_multiple_fragment_values(self):
        self.assertEqual('somelib', _parse_egg_name('a=1&egg=somelib&b=2'))


class TestFragmentStripping(TestCase):

    def test_stripping(self):
        url = 'http://example.com/index.html?a=b&c=2#some_fragment'
        parts = urlparse.urlparse(url)
        self.assertEqual('http://example.com/index.html?a=b&c=2', _strip_fragment(parts))