# -*- coding: utf-8 -*-
# test_commit.py
# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php
from __future__ import print_function

from git.test.lib import (
    TestBase,
    assert_equal,
    assert_not_equal,
    with_rw_repo,
    fixture_path,
    StringProcessAdapter
)
from git import (
    Commit,
    Actor,
)
from gitdb import IStream
from gitdb.test.lib import with_rw_directory
from git.compat import (
    string_types,
    text_type
)
from git import Repo
from git.repo.fun import touch

from io import BytesIO
import time
import sys
import re
import os
from datetime import datetime
from git.objects.util import tzoffset, utc


def assert_commit_serialization(rwrepo, commit_id, print_performance_info=False):
    """traverse all commits in the history of commit identified by commit_id and check
    if the serialization works.
    :param print_performance_info: if True, we will show how fast we are"""
    ns = 0      # num serializations
    nds = 0     # num deserializations

    st = time.time()
    for cm in rwrepo.commit(commit_id).traverse():
        nds += 1

        # assert that we deserialize commits correctly, hence we get the same
        # sha on serialization
        stream = BytesIO()
        cm._serialize(stream)
        ns += 1
        streamlen = stream.tell()
        stream.seek(0)

        istream = rwrepo.odb.store(IStream(Commit.type, streamlen, stream))
        assert istream.hexsha == cm.hexsha.encode('ascii')

        nc = Commit(rwrepo, Commit.NULL_BIN_SHA, cm.tree,
                    cm.author, cm.authored_date, cm.author_tz_offset,
                    cm.committer, cm.committed_date, cm.committer_tz_offset,
                    cm.message, cm.parents, cm.encoding)

        assert nc.parents == cm.parents
        stream = BytesIO()
        nc._serialize(stream)
        ns += 1
        streamlen = stream.tell()
        stream.seek(0)

        # reuse istream
        istream.size = streamlen
        istream.stream = stream
        istream.binsha = None
        nc.binsha = rwrepo.odb.store(istream).binsha

        # if it worked, we have exactly the same contents !
        assert nc.hexsha == cm.hexsha
    # END check commits
    elapsed = time.time() - st

    if print_performance_info:
        print("Serialized %i and deserialized %i commits in %f s ( (%f, %f) commits / s"
              % (ns, nds, elapsed, ns / elapsed, nds / elapsed), file=sys.stderr)
    # END handle performance info


class TestCommit(TestBase):

    def test_bake(self):

        commit = self.rorepo.commit('2454ae89983a4496a445ce347d7a41c0bb0ea7ae')
        # commits have no dict
        self.failUnlessRaises(AttributeError, setattr, commit, 'someattr', 1)
        commit.author  # bake

        assert_equal("Sebastian Thiel", commit.author.name)
        assert_equal("byronimo@gmail.com", commit.author.email)
        assert commit.author == commit.committer
        assert isinstance(commit.authored_date, int) and isinstance(commit.committed_date, int)
        assert isinstance(commit.author_tz_offset, int) and isinstance(commit.committer_tz_offset, int)
        assert commit.message == "Added missing information to docstrings of commit and stats module\n"

    def test_stats(self):
        commit = self.rorepo.commit('33ebe7acec14b25c5f84f35a664803fcab2f7781')
        stats = commit.stats

        def check_entries(d):
            assert isinstance(d, dict)
            for key in ("insertions", "deletions", "lines"):
                assert key in d
        # END assertion helper
        assert stats.files
        assert stats.total

        check_entries(stats.total)
        assert "files" in stats.total

        for filepath, d in stats.files.items():
            check_entries(d)
        # END for each stated file

        # assure data is parsed properly
        michael = Actor._from_string("Michael Trier <mtrier@gmail.com>")
        assert commit.author == michael
        assert commit.committer == michael
        assert commit.authored_date == 1210193388
        assert commit.committed_date == 1210193388
        assert commit.author_tz_offset == 14400, commit.author_tz_offset
        assert commit.committer_tz_offset == 14400, commit.committer_tz_offset
        assert commit.message == "initial project\n"

    def test_unicode_actor(self):
        # assure we can parse unicode actors correctly
        name = u"Üäöß ÄußÉ"
        assert len(name) == 9
        special = Actor._from_string(u"%s <something@this.com>" % name)
        assert special.name == name
        assert isinstance(special.name, text_type)

    def test_traversal(self):
        start = self.rorepo.commit("a4d06724202afccd2b5c54f81bcf2bf26dea7fff")
        first = self.rorepo.commit("33ebe7acec14b25c5f84f35a664803fcab2f7781")
        p0 = start.parents[0]
        p1 = start.parents[1]
        p00 = p0.parents[0]
        p10 = p1.parents[0]

        # basic branch first, depth first
        dfirst = start.traverse(branch_first=False)
        bfirst = start.traverse(branch_first=True)
        assert next(dfirst) == p0
        assert next(dfirst) == p00

        assert next(bfirst) == p0
        assert next(bfirst) == p1
        assert next(bfirst) == p00
        assert next(bfirst) == p10

        # at some point, both iterations should stop
        assert list(bfirst)[-1] == first
        stoptraverse = self.rorepo.commit("254d04aa3180eb8b8daf7b7ff25f010cd69b4e7d").traverse(as_edge=True)
        l = list(stoptraverse)
        assert len(l[0]) == 2

        # ignore self
        assert next(start.traverse(ignore_self=False)) == start

        # depth
        assert len(list(start.traverse(ignore_self=False, depth=0))) == 1

        # prune
        assert next(start.traverse(branch_first=1, prune=lambda i, d: i == p0)) == p1

        # predicate
        assert next(start.traverse(branch_first=1, predicate=lambda i, d: i == p1)) == p1

        # traversal should stop when the beginning is reached
        self.failUnlessRaises(StopIteration, next, first.traverse())

        # parents of the first commit should be empty ( as the only parent has a null
        # sha )
        assert len(first.parents) == 0

    def test_iteration(self):
        # we can iterate commits
        all_commits = Commit.list_items(self.rorepo, self.rorepo.head)
        assert all_commits
        assert all_commits == list(self.rorepo.iter_commits())

        # this includes merge commits
        mcomit = self.rorepo.commit('d884adc80c80300b4cc05321494713904ef1df2d')
        assert mcomit in all_commits

        # we can limit the result to paths
        ltd_commits = list(self.rorepo.iter_commits(paths='CHANGES'))
        assert ltd_commits and len(ltd_commits) < len(all_commits)

        # show commits of multiple paths, resulting in a union of commits
        less_ltd_commits = list(Commit.iter_items(self.rorepo, 'master', paths=('CHANGES', 'AUTHORS')))
        assert len(ltd_commits) < len(less_ltd_commits)

    def test_iter_items(self):
        # pretty not allowed
        self.failUnlessRaises(ValueError, Commit.iter_items, self.rorepo, 'master', pretty="raw")

    def test_rev_list_bisect_all(self):
        """
        'git rev-list --bisect-all' returns additional information
        in the commit header.  This test ensures that we properly parse it.
        """
        revs = self.rorepo.git.rev_list('933d23bf95a5bd1624fbcdf328d904e1fa173474',
                                        first_parent=True,
                                        bisect_all=True)

        commits = Commit._iter_from_process_or_stream(self.rorepo, StringProcessAdapter(revs.encode('ascii')))
        expected_ids = (
            '7156cece3c49544abb6bf7a0c218eb36646fad6d',
            '1f66cfbbce58b4b552b041707a12d437cc5f400a',
            '33ebe7acec14b25c5f84f35a664803fcab2f7781',
            '933d23bf95a5bd1624fbcdf328d904e1fa173474'
        )
        for sha1, commit in zip(expected_ids, commits):
            assert_equal(sha1, commit.hexsha)

    @with_rw_directory
    def test_ambiguous_arg_iteration(self, rw_dir):
        rw_repo = Repo.init(os.path.join(rw_dir, 'test_ambiguous_arg'))
        path = os.path.join(rw_repo.working_tree_dir, 'master')
        touch(path)
        rw_repo.index.add([path])
        rw_repo.index.commit('initial commit')
        list(rw_repo.iter_commits(rw_repo.head.ref))  # should fail unless bug is fixed

    def test_count(self):
        assert self.rorepo.tag('refs/tags/0.1.5').commit.count() == 143

    def test_list(self):
        # This doesn't work anymore, as we will either attempt getattr with bytes, or compare 20 byte string
        # with actual 20 byte bytes. This usage makes no sense anyway
        assert isinstance(Commit.list_items(self.rorepo, '0.1.5', max_count=5)[
                          '5117c9c8a4d3af19a9958677e45cda9269de1541'], Commit)

    def test_str(self):
        commit = Commit(self.rorepo, Commit.NULL_BIN_SHA)
        assert_equal(Commit.NULL_HEX_SHA, str(commit))

    def test_repr(self):
        commit = Commit(self.rorepo, Commit.NULL_BIN_SHA)
        assert_equal('<git.Commit "%s">' % Commit.NULL_HEX_SHA, repr(commit))

    def test_equality(self):
        commit1 = Commit(self.rorepo, Commit.NULL_BIN_SHA)
        commit2 = Commit(self.rorepo, Commit.NULL_BIN_SHA)
        commit3 = Commit(self.rorepo, "\1" * 20)
        assert_equal(commit1, commit2)
        assert_not_equal(commit2, commit3)

    def test_iter_parents(self):
        # should return all but ourselves, even if skip is defined
        c = self.rorepo.commit('0.1.5')
        for skip in (0, 1):
            piter = c.iter_parents(skip=skip)
            first_parent = next(piter)
            assert first_parent != c
            assert first_parent == c.parents[0]
        # END for each

    def test_name_rev(self):
        name_rev = self.rorepo.head.commit.name_rev
        assert isinstance(name_rev, string_types)

    @with_rw_repo('HEAD', bare=True)
    def test_serialization(self, rwrepo):
        # create all commits of our repo
        assert_commit_serialization(rwrepo, '0.1.6')

    def test_serialization_unicode_support(self):
        assert Commit.default_encoding.lower() == 'utf-8'

        # create a commit with unicode in the message, and the author's name
        # Verify its serialization and deserialization
        cmt = self.rorepo.commit('0.1.6')
        assert isinstance(cmt.message, text_type)     # it automatically decodes it as such
        assert isinstance(cmt.author.name, text_type)  # same here

        cmt.message = u"üäêèß"
        assert len(cmt.message) == 5

        cmt.author.name = u"äüß"
        assert len(cmt.author.name) == 3

        cstream = BytesIO()
        cmt._serialize(cstream)
        cstream.seek(0)
        assert len(cstream.getvalue())

        ncmt = Commit(self.rorepo, cmt.binsha)
        ncmt._deserialize(cstream)

        assert cmt.author.name == ncmt.author.name
        assert cmt.message == ncmt.message
        # actually, it can't be printed in a shell as repr wants to have ascii only
        # it appears
        cmt.author.__repr__()

    def test_gpgsig(self):
        cmt = self.rorepo.commit()
        cmt._deserialize(open(fixture_path('commit_with_gpgsig'), 'rb'))

        fixture_sig = """-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.11 (GNU/Linux)
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=przd
-----END PGP SIGNATURE-----"""
        assert cmt.gpgsig == fixture_sig

        cmt.gpgsig = "<test\ndummy\nsig>"
        assert cmt.gpgsig != fixture_sig

        cstream = BytesIO()
        cmt._serialize(cstream)
        assert re.search(r"^gpgsig <test\n dummy\n sig>$", cstream.getvalue().decode('ascii'), re.MULTILINE)

        cstream.seek(0)
        cmt.gpgsig = None
        cmt._deserialize(cstream)
        assert cmt.gpgsig == "<test\ndummy\nsig>"

        cmt.gpgsig = None
        cstream = BytesIO()
        cmt._serialize(cstream)
        assert not re.search(r"^gpgsig ", cstream.getvalue().decode('ascii'), re.MULTILINE)

    def test_datetimes(self):
        commit = self.rorepo.commit('4251bd5')
        assert commit.authored_date == 1255018625
        assert commit.committed_date == 1255026171
        assert commit.authored_datetime == datetime(2009, 10, 8, 18, 17, 5, tzinfo=tzoffset(-7200)), commit.authored_datetime  # noqa
        assert commit.authored_datetime == datetime(2009, 10, 8, 16, 17, 5, tzinfo=utc), commit.authored_datetime
        assert commit.committed_datetime == datetime(2009, 10, 8, 20, 22, 51, tzinfo=tzoffset(-7200))
        assert commit.committed_datetime == datetime(2009, 10, 8, 18, 22, 51, tzinfo=utc), commit.committed_datetime
