import os
import platform
import shutil
import tempfile
import unittest

import mozharness.base.errors as errors
import mozharness.base.vcs.mercurial as mercurial

test_string = '''foo
bar
baz'''

HG = ['hg'] + mercurial.HG_OPTIONS

# Known default .hgrc
os.environ['HGRCPATH'] = os.path.abspath(os.path.join(os.path.dirname(__file__), 'helper_files', '.hgrc'))


def cleanup():
    if os.path.exists('test_logs'):
        shutil.rmtree('test_logs')
    if os.path.exists('test_dir'):
        if os.path.isdir('test_dir'):
            shutil.rmtree('test_dir')
        else:
            os.remove('test_dir')
    for filename in ('localconfig.json', 'localconfig.json.bak'):
        if os.path.exists(filename):
            os.remove(filename)


def get_mercurial_vcs_obj():
    m = mercurial.MercurialVCS()
    m.config = {}
    return m


def get_revisions(dest):
    m = get_mercurial_vcs_obj()
    retval = []
    for rev in m.get_output_from_command(HG + ['log', '-R', dest, '--template', '{node}\n']).split('\n'):
        rev = rev.strip()
        if not rev:
            continue
        retval.append(rev)
    return retval


class TestMakeAbsolute(unittest.TestCase):
    # _make_absolute() doesn't play nicely with windows/msys paths.
    # TODO: fix _make_absolute, write it out of the picture, or determine
    # that it's not needed on windows.
    if platform.system() not in ("Windows",):
        def test_absolute_path(self):
            m = get_mercurial_vcs_obj()
            self.assertEquals(m._make_absolute("/foo/bar"), "/foo/bar")

        def test_relative_path(self):
            m = get_mercurial_vcs_obj()
            self.assertEquals(m._make_absolute("foo/bar"), os.path.abspath("foo/bar"))

        def test_HTTP_paths(self):
            m = get_mercurial_vcs_obj()
            self.assertEquals(m._make_absolute("http://foo/bar"), "http://foo/bar")

        def test_absolute_file_path(self):
            m = get_mercurial_vcs_obj()
            self.assertEquals(m._make_absolute("file:///foo/bar"), "file:///foo/bar")

        def test_relative_file_path(self):
            m = get_mercurial_vcs_obj()
            self.assertEquals(m._make_absolute("file://foo/bar"), "file://%s/foo/bar" % os.getcwd())


class TestHg(unittest.TestCase):
    def _init_hg_repo(self, hg_obj, repodir):
        hg_obj.run_command(["bash",
                            os.path.join(os.path.dirname(__file__),
                                         "helper_files", "init_hgrepo.sh"),
                            repodir])

    def setUp(self):
        self.tmpdir = tempfile.mkdtemp()
        self.repodir = os.path.join(self.tmpdir, 'repo')
        m = get_mercurial_vcs_obj()
        self._init_hg_repo(m, self.repodir)
        self.revisions = get_revisions(self.repodir)
        self.wc = os.path.join(self.tmpdir, 'wc')
        self.pwd = os.getcwd()

    def tearDown(self):
        shutil.rmtree(self.tmpdir)
        os.chdir(self.pwd)

    def test_get_branch(self):
        m = get_mercurial_vcs_obj()
        m.clone(self.repodir, self.wc)
        b = m.get_branch_from_path(self.wc)
        self.assertEquals(b, 'default')

    def test_get_branches(self):
        m = get_mercurial_vcs_obj()
        m.clone(self.repodir, self.wc)
        branches = m.get_branches_from_path(self.wc)
        self.assertEquals(sorted(branches), sorted(["branch2", "default"]))

    def test_clone(self):
        m = get_mercurial_vcs_obj()
        rev = m.clone(self.repodir, self.wc, update_dest=False)
        self.assertEquals(rev, None)
        self.assertEquals(self.revisions, get_revisions(self.wc))
        self.assertEquals(sorted(os.listdir(self.wc)), ['.hg'])

    def test_clone_into_non_empty_dir(self):
        m = get_mercurial_vcs_obj()
        m.mkdir_p(self.wc)
        open(os.path.join(self.wc, 'test.txt'), 'w').write('hello')
        m.clone(self.repodir, self.wc, update_dest=False)
        self.failUnless(not os.path.exists(os.path.join(self.wc, 'test.txt')))

    def test_clone_update(self):
        m = get_mercurial_vcs_obj()
        rev = m.clone(self.repodir, self.wc, update_dest=True)
        self.assertEquals(rev, self.revisions[0])

    def test_clone_branch(self):
        m = get_mercurial_vcs_obj()
        m.clone(self.repodir, self.wc, branch='branch2',
                update_dest=False)
        # On hg 1.6, we should only have a subset of the revisions
        if m.hg_ver() >= (1, 6, 0):
            self.assertEquals(self.revisions[1:],
                              get_revisions(self.wc))
        else:
            self.assertEquals(self.revisions,
                              get_revisions(self.wc))

    def test_clone_update_branch(self):
        m = get_mercurial_vcs_obj()
        rev = m.clone(self.repodir, os.path.join(self.tmpdir, 'wc'),
                      branch="branch2", update_dest=True)
        self.assertEquals(rev, self.revisions[1], self.revisions)

    def test_clone_revision(self):
        m = get_mercurial_vcs_obj()
        m.clone(self.repodir, self.wc,
                revision=self.revisions[0], update_dest=False)
        # We'll only get a subset of the revisions
        self.assertEquals(self.revisions[:1] + self.revisions[2:],
                          get_revisions(self.wc))

    def test_update_revision(self):
        m = get_mercurial_vcs_obj()
        rev = m.clone(self.repodir, self.wc, update_dest=False)
        self.assertEquals(rev, None)

        rev = m.update(self.wc, revision=self.revisions[1])
        self.assertEquals(rev, self.revisions[1])

    def test_pull(self):
        m = get_mercurial_vcs_obj()
        # Clone just the first rev
        m.clone(self.repodir, self.wc, revision=self.revisions[-1], update_dest=False)
        self.assertEquals(get_revisions(self.wc), self.revisions[-1:])

        # Now pull in new changes
        rev = m.pull(self.repodir, self.wc, update_dest=False)
        self.assertEquals(rev, None)
        self.assertEquals(get_revisions(self.wc), self.revisions)

    def test_pull_revision(self):
        m = get_mercurial_vcs_obj()
        # Clone just the first rev
        m.clone(self.repodir, self.wc, revision=self.revisions[-1], update_dest=False)
        self.assertEquals(get_revisions(self.wc), self.revisions[-1:])

        # Now pull in just the last revision
        rev = m.pull(self.repodir, self.wc, revision=self.revisions[0], update_dest=False)
        self.assertEquals(rev, None)

        # We'll be missing the middle revision (on another branch)
        self.assertEquals(get_revisions(self.wc), self.revisions[:1] + self.revisions[2:])

    def test_pull_branch(self):
        m = get_mercurial_vcs_obj()
        # Clone just the first rev
        m.clone(self.repodir, self.wc, revision=self.revisions[-1], update_dest=False)
        self.assertEquals(get_revisions(self.wc), self.revisions[-1:])

        # Now pull in the other branch
        rev = m.pull(self.repodir, self.wc, branch="branch2", update_dest=False)
        self.assertEquals(rev, None)

        # On hg 1.6, we'll be missing the last revision (on another branch)
        if m.hg_ver() >= (1, 6, 0):
            self.assertEquals(get_revisions(self.wc), self.revisions[1:])
        else:
            self.assertEquals(get_revisions(self.wc), self.revisions)

    def test_pull_unrelated(self):
        m = get_mercurial_vcs_obj()
        # Create a new repo
        repo2 = os.path.join(self.tmpdir, 'repo2')
        self._init_hg_repo(m, repo2)

        self.assertNotEqual(self.revisions, get_revisions(repo2))

        # Clone the original repo
        m.clone(self.repodir, self.wc, update_dest=False)
        # Hide the wanted error
        m.config = {'log_to_console': False}
        # Try and pull in changes from the new repo
        self.assertRaises(mercurial.VCSException, m.pull, repo2, self.wc, update_dest=False)

    def test_push(self):
        m = get_mercurial_vcs_obj()
        m.clone(self.repodir, self.wc, revision=self.revisions[-2])
        m.push(src=self.repodir, remote=self.wc)
        self.assertEquals(get_revisions(self.wc), self.revisions)

    def test_push_with_branch(self):
        m = get_mercurial_vcs_obj()
        if m.hg_ver() >= (1, 6, 0):
            m.clone(self.repodir, self.wc, revision=self.revisions[-1])
            m.push(src=self.repodir, remote=self.wc, branch='branch2')
            m.push(src=self.repodir, remote=self.wc, branch='default')
            self.assertEquals(get_revisions(self.wc), self.revisions)

    def test_push_with_revision(self):
        m = get_mercurial_vcs_obj()
        m.clone(self.repodir, self.wc, revision=self.revisions[-2])
        m.push(src=self.repodir, remote=self.wc, revision=self.revisions[-1])
        self.assertEquals(get_revisions(self.wc), self.revisions[-2:])

    def test_mercurial(self):
        m = get_mercurial_vcs_obj()
        m.vcs_config = {
            'repo': self.repodir,
            'dest': self.wc,
            'vcs_share_base': os.path.join(self.tmpdir, 'share'),
        }
        m.ensure_repo_and_revision()
        rev = m.ensure_repo_and_revision()
        self.assertEquals(rev, self.revisions[0])

    def test_push_new_branches_not_allowed(self):
        m = get_mercurial_vcs_obj()
        m.clone(self.repodir, self.wc, revision=self.revisions[0])
        # Hide the wanted error
        m.config = {'log_to_console': False}
        self.assertRaises(Exception, m.push, self.repodir, self.wc, push_new_branches=False)

    def test_mercurial_relative_dir(self):
        m = get_mercurial_vcs_obj()
        repo = os.path.basename(self.repodir)
        wc = os.path.basename(self.wc)
        m.vcs_config = {
            'repo': repo,
            'dest': wc,
            'revision': self.revisions[-1],
            'vcs_share_base': os.path.join(self.tmpdir, 'share'),
        }
        m.chdir(os.path.dirname(self.repodir))
        try:
            rev = m.ensure_repo_and_revision()
            self.assertEquals(rev, self.revisions[-1])
            m.info("Creating test.txt")
            open(os.path.join(self.wc, 'test.txt'), 'w').write("hello!")

            m = get_mercurial_vcs_obj()
            m.vcs_config = {
                'repo': repo,
                'dest': wc,
                'revision': self.revisions[0],
                'vcs_share_base': os.path.join(self.tmpdir, 'share'),
            }
            rev = m.ensure_repo_and_revision()
            self.assertEquals(rev, self.revisions[0])
            # Make sure our local file didn't go away
            self.failUnless(os.path.exists(os.path.join(self.wc, 'test.txt')))
        finally:
            m.chdir(self.pwd)

    def test_mercurial_update_tip(self):
        m = get_mercurial_vcs_obj()
        m.vcs_config = {
            'repo': self.repodir,
            'dest': self.wc,
            'revision': self.revisions[-1],
            'vcs_share_base': os.path.join(self.tmpdir, 'share'),
        }
        rev = m.ensure_repo_and_revision()
        self.assertEquals(rev, self.revisions[-1])
        open(os.path.join(self.wc, 'test.txt'), 'w').write("hello!")

        m = get_mercurial_vcs_obj()
        m.vcs_config = {
            'repo': self.repodir,
            'dest': self.wc,
            'vcs_share_base': os.path.join(self.tmpdir, 'share'),
        }
        rev = m.ensure_repo_and_revision()
        self.assertEquals(rev, self.revisions[0])
        # Make sure our local file didn't go away
        self.failUnless(os.path.exists(os.path.join(self.wc, 'test.txt')))

    def test_mercurial_update_rev(self):
        m = get_mercurial_vcs_obj()
        m.vcs_config = {
            'repo': self.repodir,
            'dest': self.wc,
            'revision': self.revisions[-1],
            'vcs_share_base': os.path.join(self.tmpdir, 'share'),
        }
        rev = m.ensure_repo_and_revision()
        self.assertEquals(rev, self.revisions[-1])
        open(os.path.join(self.wc, 'test.txt'), 'w').write("hello!")

        m = get_mercurial_vcs_obj()
        m.vcs_config = {
            'repo': self.repodir,
            'dest': self.wc,
            'revision': self.revisions[0],
            'vcs_share_base': os.path.join(self.tmpdir, 'share'),
        }
        rev = m.ensure_repo_and_revision()
        self.assertEquals(rev, self.revisions[0])
        # Make sure our local file didn't go away
        self.failUnless(os.path.exists(os.path.join(self.wc, 'test.txt')))

    def test_make_hg_url(self):
        #construct an hg url specific to revision, branch and filename and try to pull it down
        file_url = mercurial.make_hg_url(
            "hg.mozilla.org",
            '//build/tools/',
            revision='FIREFOX_3_6_12_RELEASE',
            filename="/lib/python/util/hg.py",
            protocol='https',
        )
        expected_url = "https://hg.mozilla.org/build/tools/raw-file/FIREFOX_3_6_12_RELEASE/lib/python/util/hg.py"
        self.assertEquals(file_url, expected_url)

    def test_make_hg_url_no_filename(self):
        file_url = mercurial.make_hg_url(
            "hg.mozilla.org",
            "/build/tools",
            revision="default",
            protocol='https',
        )
        expected_url = "https://hg.mozilla.org/build/tools/rev/default"
        self.assertEquals(file_url, expected_url)

    def test_make_hg_url_no_revision_no_filename(self):
        repo_url = mercurial.make_hg_url(
            "hg.mozilla.org",
            "/build/tools",
            protocol='https',
        )
        expected_url = "https://hg.mozilla.org/build/tools"
        self.assertEquals(repo_url, expected_url)

    def test_make_hg_url_different_protocol(self):
        repo_url = mercurial.make_hg_url(
            "hg.mozilla.org",
            "/build/tools",
            protocol='ssh',
        )
        expected_url = "ssh://hg.mozilla.org/build/tools"
        self.assertEquals(repo_url, expected_url)

if __name__ == '__main__':
    unittest.main()
