# -*- coding: UTF-8 -*-
#
# Copyright 2010-2017 The pygit2 contributors
#
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# it under the terms of the GNU General Public License, version 2,
# as published by the Free Software Foundation.
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# the authors give you unlimited permission to link the compiled
# version of this file into combinations with other programs,
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# restrictions do apply in other respects; for example, they cover
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# a combined executable.)
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# This file is distributed in the hope that it will be useful, but
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
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# along with this program; see the file COPYING.  If not, write to
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"""Tests for revision walk."""

from __future__ import absolute_import
from __future__ import unicode_literals
import unittest

from pygit2 import GIT_SORT_NONE, GIT_SORT_TIME, GIT_SORT_REVERSE
from . import utils


# In the order given by git log
log = [
    '2be5719152d4f82c7302b1c0932d8e5f0a4a0e98',
    '5ebeeebb320790caf276b9fc8b24546d63316533',
    '4ec4389a8068641da2d6578db0419484972284c8',
    '6aaa262e655dd54252e5813c8e5acd7780ed097d',
    'acecd5ea2924a4b900e7e149496e1f4b57976e51']

REVLOGS = [
    ('Nico von Geyso', 'checkout: moving from i18n to master'),
    ('Nico von Geyso', 'commit: added bye.txt and new'),
    ('Nico von Geyso', 'checkout: moving from master to i18n'),
    ('J. David Ibañez', 'merge i18n: Merge made by recursive.'),
    ('J. David Ibañez', 'commit: Add .gitignore file'),
    ('J. David Ibañez', 'checkout: moving from i18n to master'),
    ('J. David Ibañez', 'commit: Say hello in French'),
    ('J. David Ibañez', 'commit: Say hello in Spanish'),
    ('J. David Ibañez', 'checkout: moving from master to i18n'),
    ('J. David Ibañez', 'commit (initial): First commit')
]


class RevlogTestTest(utils.RepoTestCase):
    def test_log(self):
        ref = self.repo.lookup_reference('HEAD')
        for i, entry in enumerate(ref.log()):
            self.assertEqual(entry.committer.name, REVLOGS[i][0])
            self.assertEqual(entry.message, REVLOGS[i][1])


class WalkerTest(utils.RepoTestCase):

    def test_walk(self):
        walker = self.repo.walk(log[0], GIT_SORT_TIME)
        self.assertEqual([x.hex for x in walker], log)

    def test_reverse(self):
        walker = self.repo.walk(log[0], GIT_SORT_TIME | GIT_SORT_REVERSE)
        self.assertEqual([x.hex for x in walker], list(reversed(log)))

    def test_hide(self):
        walker = self.repo.walk(log[0], GIT_SORT_TIME)
        walker.hide('4ec4389a8068641da2d6578db0419484972284c8')
        self.assertEqual(len(list(walker)), 2)

    def test_hide_prefix(self):
        walker = self.repo.walk(log[0], GIT_SORT_TIME)
        walker.hide('4ec4389a')
        self.assertEqual(len(list(walker)), 2)

    def test_reset(self):
        walker = self.repo.walk(log[0], GIT_SORT_TIME)
        walker.reset()
        self.assertEqual([x.hex for x in walker], [])

    def test_push(self):
        walker = self.repo.walk(log[-1], GIT_SORT_TIME)
        self.assertEqual([x.hex for x in walker], log[-1:])
        walker.reset()
        walker.push(log[0])
        self.assertEqual([x.hex for x in walker], log)

    def test_sort(self):
        walker = self.repo.walk(log[0], GIT_SORT_TIME)
        walker.sort(GIT_SORT_TIME | GIT_SORT_REVERSE)
        self.assertEqual([x.hex for x in walker], list(reversed(log)))

    def test_simplify_first_parent(self):
        walker = self.repo.walk(log[0], GIT_SORT_TIME)
        walker.simplify_first_parent()
        self.assertEqual(len(list(walker)), 3)

    def test_default_sorting(self):
        walker = self.repo.walk(log[0], GIT_SORT_NONE)
        list1 = list([x.id for x in walker])
        walker = self.repo.walk(log[0])
        list2 = list([x.id for x in walker])

        self.assertEqual(list1, list2)

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