# encoding: utf8
"""
Tests so called "in memory changesets" commit API of vcs.
"""

import time
import datetime

import pytest

from kallithea.lib import vcs
from kallithea.lib.vcs.exceptions import EmptyRepositoryError
from kallithea.lib.vcs.exceptions import NodeAlreadyAddedError
from kallithea.lib.vcs.exceptions import NodeAlreadyExistsError
from kallithea.lib.vcs.exceptions import NodeAlreadyRemovedError
from kallithea.lib.vcs.exceptions import NodeAlreadyChangedError
from kallithea.lib.vcs.exceptions import NodeDoesNotExistError
from kallithea.lib.vcs.exceptions import NodeNotChangedError
from kallithea.lib.vcs.nodes import DirNode
from kallithea.lib.vcs.nodes import FileNode
from kallithea.lib.vcs.utils import safe_unicode

from kallithea.tests.vcs.conf import get_new_dir


class InMemoryChangesetTestMixin(object):
    """
    This is a backend independent test case class which should be created
    with ``type`` method.

    It is required to set following attributes at subclass:

    - ``backend_alias``: alias of used backend (see ``vcs.BACKENDS``)
    - ``repo_path``: path to the repository which would be created for set of
      tests
    """

    def get_backend(self):
        return vcs.get_backend(self.backend_alias)

    def setup_method(self):
        Backend = self.get_backend()
        self.repo_path = get_new_dir(str(time.time()))
        self.repo = Backend(self.repo_path, create=True)
        self.imc = self.repo.in_memory_changeset
        self.nodes = [
            FileNode('foobar', content='Foo & bar'),
            FileNode('foobar2', content='Foo & bar, doubled!'),
            FileNode('foo bar with spaces', content=''),
            FileNode('foo/bar/baz', content='Inside'),
            FileNode('foo/bar/file.bin', content='\xd0\xcf\x11\xe0\xa1\xb1\x1a\xe1\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00;\x00\x03\x00\xfe\xff\t\x00\x06\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x1a\x00\x00\x00\x00\x00\x00\x00\x00\x10\x00\x00\x18\x00\x00\x00\x01\x00\x00\x00\xfe\xff\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff'),
        ]

    def test_add(self):
        rev_count = len(self.repo.revisions)
        to_add = [FileNode(node.path, content=node.content)
            for node in self.nodes]
        for node in to_add:
            self.imc.add(node)
        message = u'Added: %s' % ', '.join((node.path for node in self.nodes))
        author = unicode(self.__class__)
        changeset = self.imc.commit(message=message, author=author)

        newtip = self.repo.get_changeset()
        assert changeset == newtip
        assert rev_count + 1 == len(self.repo.revisions)
        assert newtip.message == message
        assert newtip.author == author
        assert not any((
            self.imc.added,
            self.imc.changed,
            self.imc.removed
        ))
        for node in to_add:
            assert newtip.get_node(node.path).content == node.content

    def test_add_in_bulk(self):
        rev_count = len(self.repo.revisions)
        to_add = [FileNode(node.path, content=node.content)
            for node in self.nodes]
        self.imc.add(*to_add)
        message = u'Added: %s' % ', '.join((node.path for node in self.nodes))
        author = unicode(self.__class__)
        changeset = self.imc.commit(message=message, author=author)

        newtip = self.repo.get_changeset()
        assert changeset == newtip
        assert rev_count + 1 == len(self.repo.revisions)
        assert newtip.message == message
        assert newtip.author == author
        assert not any((
            self.imc.added,
            self.imc.changed,
            self.imc.removed
        ))
        for node in to_add:
            assert newtip.get_node(node.path).content == node.content

    def test_add_actually_adds_all_nodes_at_second_commit_too(self):
        self.imc.add(FileNode('foo/bar/image.png', content='\0'))
        self.imc.add(FileNode('foo/README.txt', content='readme!'))
        changeset = self.imc.commit(u'Initial', u'joe.doe@example.com')
        assert isinstance(changeset.get_node('foo'), DirNode)
        assert isinstance(changeset.get_node('foo/bar'), DirNode)
        assert changeset.get_node('foo/bar/image.png').content == '\0'
        assert changeset.get_node('foo/README.txt').content == 'readme!'

        # commit some more files again
        to_add = [
            FileNode('foo/bar/foobaz/bar', content='foo'),
            FileNode('foo/bar/another/bar', content='foo'),
            FileNode('foo/baz.txt', content='foo'),
            FileNode('foobar/foobaz/file', content='foo'),
            FileNode('foobar/barbaz', content='foo'),
        ]
        self.imc.add(*to_add)
        changeset = self.imc.commit(u'Another', u'joe.doe@example.com')
        changeset.get_node('foo/bar/foobaz/bar').content == 'foo'
        changeset.get_node('foo/bar/another/bar').content == 'foo'
        changeset.get_node('foo/baz.txt').content == 'foo'
        changeset.get_node('foobar/foobaz/file').content == 'foo'
        changeset.get_node('foobar/barbaz').content == 'foo'

    def test_add_non_ascii_files(self):
        rev_count = len(self.repo.revisions)
        to_add = [
            FileNode('żółwik/zwierzątko', content='ćććć'),
            FileNode(u'żółwik/zwierzątko_uni', content=u'ćććć'),
        ]
        for node in to_add:
            self.imc.add(node)
        message = u'Added: %s' % ', '.join((node.path for node in self.nodes))
        author = unicode(self.__class__)
        changeset = self.imc.commit(message=message, author=author)

        newtip = self.repo.get_changeset()
        assert changeset == newtip
        assert rev_count + 1 == len(self.repo.revisions)
        assert newtip.message == message
        assert newtip.author == author
        assert not any((
            self.imc.added,
            self.imc.changed,
            self.imc.removed
        ))
        for node in to_add:
            assert newtip.get_node(node.path).content == node.content

    def test_add_raise_already_added(self):
        node = FileNode('foobar', content='baz')
        self.imc.add(node)
        with pytest.raises(NodeAlreadyAddedError):
            self.imc.add(node)

    def test_check_integrity_raise_already_exist(self):
        node = FileNode('foobar', content='baz')
        self.imc.add(node)
        self.imc.commit(message=u'Added foobar', author=unicode(self))
        self.imc.add(node)
        with pytest.raises(NodeAlreadyExistsError):
            self.imc.commit(message='new message',
                            author=str(self))

    def test_change(self):
        self.imc.add(FileNode('foo/bar/baz', content='foo'))
        self.imc.add(FileNode('foo/fbar', content='foobar'))
        tip = self.imc.commit(u'Initial', u'joe.doe@example.com')

        # Change node's content
        node = FileNode('foo/bar/baz', content='My **changed** content')
        self.imc.change(node)
        self.imc.commit(u'Changed %s' % node.path, u'joe.doe@example.com')

        newtip = self.repo.get_changeset()
        assert tip != newtip
        assert tip.id != newtip.id
        assert newtip.get_node('foo/bar/baz').content == 'My **changed** content'

    def test_change_non_ascii(self):
        to_add = [
            FileNode('żółwik/zwierzątko', content='ćććć'),
            FileNode(u'żółwik/zwierzątko_uni', content=u'ćććć'),
        ]
        for node in to_add:
            self.imc.add(node)

        tip = self.imc.commit(u'Initial', u'joe.doe@example.com')

        # Change node's content
        node = FileNode('żółwik/zwierzątko', content='My **changed** content')
        self.imc.change(node)
        self.imc.commit(u'Changed %s' % safe_unicode(node.path),
                        u'joe.doe@example.com')

        node = FileNode(u'żółwik/zwierzątko_uni', content=u'My **changed** content')
        self.imc.change(node)
        self.imc.commit(u'Changed %s' % safe_unicode(node.path),
                        u'joe.doe@example.com')

        newtip = self.repo.get_changeset()
        assert tip != newtip
        assert tip.id != newtip.id

        assert newtip.get_node('żółwik/zwierzątko').content == 'My **changed** content'
        assert newtip.get_node('żółwik/zwierzątko_uni').content == 'My **changed** content'

    def test_change_raise_empty_repository(self):
        node = FileNode('foobar')
        with pytest.raises(EmptyRepositoryError):
            self.imc.change(node)

    def test_check_integrity_change_raise_node_does_not_exist(self):
        node = FileNode('foobar', content='baz')
        self.imc.add(node)
        self.imc.commit(message=u'Added foobar', author=unicode(self))
        node = FileNode('not-foobar', content='')
        self.imc.change(node)
        with pytest.raises(NodeDoesNotExistError):
            self.imc.commit(message='Changed not existing node', author=str(self))

    def test_change_raise_node_already_changed(self):
        node = FileNode('foobar', content='baz')
        self.imc.add(node)
        self.imc.commit(message=u'Added foobar', author=unicode(self))
        node = FileNode('foobar', content='more baz')
        self.imc.change(node)
        with pytest.raises(NodeAlreadyChangedError):
            self.imc.change(node)

    def test_check_integrity_change_raise_node_not_changed(self):
        self.test_add()  # Performs first commit

        node = FileNode(self.nodes[0].path, content=self.nodes[0].content)
        self.imc.change(node)
        with pytest.raises(NodeNotChangedError):
            self.imc.commit(
                message=u'Trying to mark node as changed without touching it',
                author=unicode(self)
            )

    def test_change_raise_node_already_removed(self):
        node = FileNode('foobar', content='baz')
        self.imc.add(node)
        self.imc.commit(message=u'Added foobar', author=unicode(self))
        self.imc.remove(FileNode('foobar'))
        with pytest.raises(NodeAlreadyRemovedError):
            self.imc.change(node)

    def test_remove(self):
        self.test_add()  # Performs first commit

        tip = self.repo.get_changeset()
        node = self.nodes[0]
        assert node.content == tip.get_node(node.path).content
        self.imc.remove(node)
        self.imc.commit(message=u'Removed %s' % node.path, author=unicode(self))

        newtip = self.repo.get_changeset()
        assert tip != newtip
        assert tip.id != newtip.id
        with pytest.raises(NodeDoesNotExistError):
            newtip.get_node(node.path)

    def test_remove_last_file_from_directory(self):
        node = FileNode('omg/qwe/foo/bar', content='foobar')
        self.imc.add(node)
        self.imc.commit(u'added', u'joe doe')

        self.imc.remove(node)
        tip = self.imc.commit(u'removed', u'joe doe')
        with pytest.raises(NodeDoesNotExistError):
            tip.get_node('omg/qwe/foo/bar')

    def test_remove_raise_node_does_not_exist(self):
        self.imc.remove(self.nodes[0])
        with pytest.raises(NodeDoesNotExistError):
            self.imc.commit(
                message='Trying to remove node at empty repository',
                author=str(self)
            )

    def test_check_integrity_remove_raise_node_does_not_exist(self):
        self.test_add()  # Performs first commit

        node = FileNode('no-such-file')
        self.imc.remove(node)
        with pytest.raises(NodeDoesNotExistError):
            self.imc.commit(
                message=u'Trying to remove not existing node',
                author=unicode(self)
            )

    def test_remove_raise_node_already_removed(self):
        self.test_add() # Performs first commit

        node = FileNode(self.nodes[0].path)
        self.imc.remove(node)
        with pytest.raises(NodeAlreadyRemovedError):
            self.imc.remove(node)

    def test_remove_raise_node_already_changed(self):
        self.test_add()  # Performs first commit

        node = FileNode(self.nodes[0].path, content='Bending time')
        self.imc.change(node)
        with pytest.raises(NodeAlreadyChangedError):
            self.imc.remove(node)

    def test_reset(self):
        self.imc.add(FileNode('foo', content='bar'))
        #self.imc.change(FileNode('baz', content='new'))
        #self.imc.remove(FileNode('qwe'))
        self.imc.reset()
        assert not any((
            self.imc.added,
            self.imc.changed,
            self.imc.removed
        ))

    def test_multiple_commits(self):
        N = 3  # number of commits to perform
        last = None
        for x in xrange(N):
            fname = 'file%s' % str(x).rjust(5, '0')
            content = 'foobar\n' * x
            node = FileNode(fname, content=content)
            self.imc.add(node)
            commit = self.imc.commit(u"Commit no. %s" % (x + 1), author=u'vcs')
            assert last != commit
            last = commit

        # Check commit number for same repo
        assert len(self.repo.revisions) == N

        # Check commit number for recreated repo
        backend = self.get_backend()
        repo = backend(self.repo_path)
        assert len(repo.revisions) == N

    def test_date_attr(self):
        node = FileNode('foobar.txt', content='Foobared!')
        self.imc.add(node)
        date = datetime.datetime(1985, 1, 30, 1, 45)
        commit = self.imc.commit(u"Committed at time when I was born ;-)",
            author=u'lb <lb@example.com>', date=date)

        assert commit.date == date


class BackendBaseTestCase(object):
    """
    Base test class for tests which requires repository.
    """
    backend_alias = 'hg'
    commits = [
        {
            'message': 'Initial commit',
            'author': 'Joe Doe <joe.doe@example.com>',
            'date': datetime.datetime(2010, 1, 1, 20),
            'added': [
                FileNode('foobar', content='Foobar'),
                FileNode('foobar2', content='Foobar II'),
                FileNode('foo/bar/baz', content='baz here!'),
            ],
        },
    ]

    def get_backend(self):
        return vcs.get_backend(self.backend_alias)

    def get_commits(self):
        """
        Returns list of commits which builds repository for each tests.
        """
        if hasattr(self, 'commits'):
            return self.commits

    def get_new_repo_path(self):
        """
        Returns newly created repository's directory.
        """
        key = '%s-%s' % (self.backend_alias, str(time.time()))
        repo_path = get_new_dir(key)
        return repo_path

    def setup_method(self):
        Backend = self.get_backend()
        self.backend_class = Backend
        self.repo_path = self.get_new_repo_path()
        self.repo = Backend(self.repo_path, create=True)
        self.imc = self.repo.in_memory_changeset

        for commit in self.get_commits():
            for node in commit.get('added', []):
                self.imc.add(FileNode(node.path, content=node.content))
            for node in commit.get('changed', []):
                self.imc.change(FileNode(node.path, content=node.content))
            for node in commit.get('removed', []):
                self.imc.remove(FileNode(node.path))
            self.imc.commit(message=unicode(commit['message']),
                            author=unicode(commit['author']),
                date=commit['date'])

        self.tip = self.repo.get_changeset()


class TestGitInMemoryChangeset(InMemoryChangesetTestMixin):
    backend_alias = 'git'


class TestHgInMemoryChangeset(InMemoryChangesetTestMixin):
    backend_alias = 'hg'