import os
import sys
import unittest

from mercurial import hg
from mercurial import ui

# wrapped in a try/except because of weirdness in how
# run.py works as compared to nose.
try:
    import test_util
except ImportError:
    sys.path.insert(0, os.path.dirname(os.path.dirname(__file__)))
    import test_util

from hgsubversion import wrappers


def _do_case(self, name, layout):
    subdir = test_util.subdir.get(name, '')
    config = {}
    u = ui.ui()
    for branch, path in test_util.custom.get(name, {}).iteritems():
        config['hgsubversionbranch.%s' % branch] = path
        u.setconfig('hgsubversionbranch', branch, path)
    repo, repo_path = self.load_and_fetch(name,
                                          subdir=subdir,
                                          layout=layout,
                                          config=config)
    assert test_util.repolen(self.repo) > 0, \
        'Repo had no changes, maybe you need to add a subdir entry in test_util?'
    wc2_path = self.wc_path + '_stupid'
    checkout_path = repo_path
    if subdir:
        checkout_path += '/' + subdir
    u.setconfig('hgsubversion', 'stupid', '1')
    u.setconfig('hgsubversion', 'layout', layout)
    test_util.hgclone(u, test_util.fileurl(checkout_path), wc2_path, update=False)
    if layout == 'single':
        self.assertEqual(len(self.repo.heads()), 1)
    self.repo2 = hg.repository(ui.ui(), wc2_path)
    self.assertEqual(self.repo.heads(), self.repo2.heads())


def buildmethod(case, name, layout):
    m = lambda self: self._do_case(case, layout)
    m.__name__ = name
    m.__doc__ = 'Test stupid produces same as real on %s. (%s)' % (case, layout)
    return m

attrs = {'_do_case': _do_case,
         }
for case in (f for f in os.listdir(test_util.FIXTURES) if f.endswith('.svndump')):
    if case == 'corrupt.svndump':
        continue
    name = 'test_' + case[:-len('.svndump')].replace('-', '_')
    # Automatic layout branchtag collision exposes a minor defect
    # here, but since it isn't a regression we suppress the test case.
    if case != 'branchtagcollision.svndump':
        attrs[name] = buildmethod(case, name, 'auto')
    attrs[name + '_single'] = buildmethod(case, name + '_single', 'single')
    if case in test_util.custom:
        attrs[name + '_custom'] = buildmethod(case, name + '_custom', 'custom')

StupidPullTests = type('StupidPullTests', (test_util.TestBase,), attrs)