from kallithea.lib.utils import make_ui, setup_cache_regions

from kallithea.lib.utils2 import safe_str, safe_unicode, _extract_extras

from kallithea.model.db import Repository, User, Ui

def _get_scm_size(alias, root_path):

    if not alias.startswith('.'):

        alias += '.'

    size_scm, size_root = 0, 0

    for path, dirs, files in os.walk(safe_str(root_path)):

        if path.find(alias) != -1:

            for f in files:

                try:

                    size_scm += os.path.getsize(os.path.join(path, f))

                except OSError:

                    pass

        else:

            for f in files:

                try:

                    size_root += os.path.getsize(os.path.join(path, f))

                except OSError:

                    pass

    size_scm_f = h.format_byte_size(size_scm)

    size_root_f = h.format_byte_size(size_root)

    size_total_f = h.format_byte_size(size_root + size_scm)

    return size_scm_f, size_root_f, size_total_f

def repo_size(ui, repo, hooktype=None, **kwargs):

    """Presents size of repository after push"""

    size_hg_f, size_root_f, size_total_f = _get_scm_size('.hg', repo.root)

    last_cs = repo[len(repo) - 1]

    msg = ('Repository size .hg: %s Checkout: %s Total: %s\n'

           'Last revision is now r%s:%s\n') % (

        size_hg_f, size_root_f, size_total_f, last_cs.rev(), last_cs.hex()[:12]

    )

    ui.status(msg)

def log_pull_action(ui, repo, **kwargs):

    """Logs user last pull action

    Called as Mercurial hook outgoing.pull_logger or from Kallithea before invoking Git.

    """

    ex = _extract_extras()

    user = User.get_by_username(ex.username)

    action = 'pull'

    action_logger(user, action, ex.repository, ex.ip, commit=True)

    # extension hook call

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'PULL_HOOK', None)

    if callable(callback):

        kw = {}

        kw.update(ex)

        callback(**kw)

    return 0

    """

    """

    ex = _extract_extras()

    action_logger(ex.username, action, ex.repository, ex.ip, commit=True)

    from kallithea.model.scm import ScmModel

    ScmModel().mark_for_invalidation(ex.repository)

    # extension hook call

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'PUSH_HOOK', None)

    if callable(callback):

        kw = {'pushed_revs': revs}

        kw.update(ex)

        callback(**kw)

def log_create_repository(repository_dict, created_by, **kwargs):

    """

    Post create repository Hook.

    :param repository: dict dump of repository object

    :param created_by: username who created repository

    available keys of repository_dict:

     'repo_type',

     'description',

     'private',

     'created_on',

     'enable_downloads',

     'repo_id',

     'owner_id',

     'enable_statistics',

     'clone_uri',

     'fork_id',

     'group_id',

     'repo_name'

    """

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'CREATE_REPO_HOOK', None)

    if callable(callback):

        kw = {}

        kw.update(repository_dict)

        kw.update({'created_by': created_by})

        kw.update(kwargs)

        return callback(**kw)

    return 0

def check_allowed_create_user(user_dict, created_by, **kwargs):

    # pre create hooks

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'PRE_CREATE_USER_HOOK', None)

    if callable(callback):

        allowed, reason = callback(created_by=created_by, **user_dict)

        if not allowed:

            raise UserCreationError(reason)

def log_create_user(user_dict, created_by, **kwargs):

    """

    callback = getattr(EXTENSIONS, 'DELETE_USER_HOOK', None)

    if callable(callback):

        return callback(deleted_by=deleted_by, **user_dict)

    return 0

def _hook_environment(repo_path):

    """

    Create a light-weight environment for stand-alone scripts and return an UI and the

    db repository.

    Git hooks are executed as subprocess of Git while Kallithea is waiting, and

    they thus need enough info to be able to create an app environment and

    connect to the database.

    """

    from paste.deploy import appconfig

    from sqlalchemy import engine_from_config

    from kallithea.config.environment import load_environment

    from kallithea.model.base import init_model

    extras = _extract_extras()

    ini_file_path = extras['config']

    #logging.config.fileConfig(ini_file_path) # Note: we are in a different process - don't use configured logging

    app_conf = appconfig('config:%s' % ini_file_path)

    conf = load_environment(app_conf.global_conf, app_conf.local_conf)

    setup_cache_regions(conf)

    engine = engine_from_config(conf, 'sqlalchemy.')

    init_model(engine)

    repo_path = safe_unicode(repo_path)

    # fix if it's not a bare repo

    if repo_path.endswith(os.sep + '.git'):

        repo_path = repo_path[:-5]

    repo = Repository.get_by_full_path(repo_path)

    if not repo:

        raise OSError('Repository %s not found in database'

                      % (safe_str(repo_path)))

    baseui = make_ui()

    return baseui, repo

def handle_git_pre_receive(repo_path, git_stdin_lines):

    """Called from Git pre-receive hook"""

    return 0

def handle_git_post_receive(repo_path, git_stdin_lines):

    """Called from Git post-receive hook"""

    baseui, repo = _hook_environment(repo_path)

    # the post push hook should never use the cached instance

    scm_repo = repo.scm_instance_no_cache()

    rev_data = []

    for l in git_stdin_lines:

        old_rev, new_rev, ref = l.strip().split(' ')

        _ref_data = ref.split('/')

        if _ref_data[1] in ['tags', 'heads']:

            rev_data.append({'old_rev': old_rev,

                             'new_rev': new_rev,

                             'ref': ref,

                             'type': _ref_data[1],

                             'name': '/'.join(_ref_data[2:])})

    git_revs = []

    for push_ref in rev_data:

        _type = push_ref['type']

        if _type == 'heads':

            if push_ref['old_rev'] == EmptyChangeset().raw_id:

                # update the symbolic ref if we push new repo

                if scm_repo.is_empty():

                    scm_repo._repo.refs.set_symbolic_ref('HEAD',

                                        'refs/heads/%s' % push_ref['name'])

                # build exclude list without the ref

                cmd = ['for-each-ref', '--format=%(refname)', 'refs/heads/*']

                stdout, stderr = scm_repo.run_git_command(cmd)

                ref = push_ref['ref']

                heads = [head for head in stdout.splitlines() if head != ref]

                # now list the git revs while excluding from the list

                cmd = ['log', push_ref['new_rev'], '--reverse', '--pretty=format:%H']

                cmd.append('--not')

                cmd.extend(heads) # empty list is ok

                stdout, stderr = scm_repo.run_git_command(cmd)

                git_revs += stdout.splitlines()

            elif push_ref['new_rev'] == EmptyChangeset().raw_id:

                # delete branch case

                git_revs += ['delete_branch=>%s' % push_ref['name']]

            else:

                cmd = ['log', '%(old_rev)s..%(new_rev)s' % push_ref,

                       '--reverse', '--pretty=format:%H']

                stdout, stderr = scm_repo.run_git_command(cmd)

                git_revs += stdout.splitlines()

        elif _type == 'tags':

            git_revs += ['tag=>%s' % push_ref['name']]

    return 0

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""

kallithea.model.scm

~~~~~~~~~~~~~~~~~~~

Scm model for Kallithea

This file was forked by the Kallithea project in July 2014.

Original author and date, and relevant copyright and licensing information is below:

:created_on: Apr 9, 2010

:author: marcink

:copyright: (c) 2013 RhodeCode GmbH, and others.

:license: GPLv3, see LICENSE.md for more details.

"""

import os

import sys

import posixpath

import re

import time

import traceback

import logging

import cStringIO

import pkg_resources

from sqlalchemy import func

from tg.i18n import ugettext as _

import kallithea

from kallithea.lib.vcs import get_backend

from kallithea.lib.vcs.exceptions import RepositoryError

from kallithea.lib.vcs.utils.lazy import LazyProperty

from kallithea.lib.vcs.nodes import FileNode

from kallithea.lib.vcs.backends.base import EmptyChangeset

from kallithea import BACKENDS

from kallithea.lib import helpers as h

from kallithea.lib.utils2 import safe_str, safe_unicode, get_server_url, \

    _set_extras

from kallithea.lib.auth import HasRepoPermissionLevel, HasRepoGroupPermissionLevel, \

    HasUserGroupPermissionLevel, HasPermissionAny, HasPermissionAny

from kallithea.lib.utils import get_filesystem_repos, make_ui, \

    action_logger

from kallithea.model.db import Repository, Session, Ui, CacheInvalidation, \

    UserFollowing, UserLog, User, RepoGroup, PullRequest

from kallithea.lib.exceptions import NonRelativePathError, IMCCommitError

log = logging.getLogger(__name__)

class UserTemp(object):

    def __init__(self, user_id):

        self.user_id = user_id

    def __repr__(self):

        return "<%s('id:%s')>" % (self.__class__.__name__, self.user_id)

class RepoTemp(object):

    def __init__(self, repo_id):

        self.repo_id = repo_id

    def __repr__(self):

        return "<%s('id:%s')>" % (self.__class__.__name__, self.repo_id)

class _PermCheckIterator(object):

    def __init__(self, obj_list, obj_attr, perm_set, perm_checker, extra_kwargs=None):

        """

        Creates iterator from given list of objects, additionally

        checking permission for them from perm_set var

        :param obj_list: list of db objects

        :param obj_attr: attribute of object to pass into perm_checker

        :param perm_set: list of permissions to check

        :param perm_checker: callable to check permissions against

        """

        self.obj_list = obj_list

        self.obj_attr = obj_attr

        self.perm_set = perm_set

        self.perm_checker = perm_checker

        self.extra_kwargs = extra_kwargs or {}

    def __len__(self):

        return len(self.obj_list)

    def __repr__(self):

        return '<%s (%s)>' % (self.__class__.__name__, self.__len__())

    def __iter__(self):

        for db_obj in self.obj_list:

            # check permission at this level

            name = getattr(db_obj, self.obj_attr, None)

    def get_forks(self, repo):

        repo = Repository.guess_instance(repo)

        return Repository.query() \

                .filter(Repository.fork == repo).count()

    def get_pull_requests(self, repo):

        repo = Repository.guess_instance(repo)

        return PullRequest.query() \

                .filter(PullRequest.other_repo == repo) \

                .filter(PullRequest.status != PullRequest.STATUS_CLOSED).count()

    def mark_as_fork(self, repo, fork, user):

        repo = self.__get_repo(repo)

        fork = self.__get_repo(fork)

        if fork and repo.repo_id == fork.repo_id:

            raise Exception("Cannot set repository as fork of itself")

        if fork and repo.repo_type != fork.repo_type:

            raise RepositoryError("Cannot set repository as fork of repository with other type")

        repo.fork = fork

        return repo

    def _handle_rc_scm_extras(self, username, repo_name, repo_alias,

                              action=None):

        from kallithea import CONFIG

        from kallithea.lib.base import _get_ip_addr

        try:

            from tg import request

            environ = request.environ

        except TypeError:

            # we might use this outside of request context, let's fake the

            # environ data

            from webob import Request

            environ = Request.blank('').environ

        extras = {

            'ip': _get_ip_addr(environ),

            'username': username,

            'action': action or 'push_local',

            'repository': repo_name,

            'scm': repo_alias,

            'config': CONFIG['__file__'],

            'server_url': get_server_url(environ),

        }

        _set_extras(extras)

    def _handle_push(self, repo, username, action, repo_name, revisions):

        """

        :param username: username who pushes

        :param action: push/push_local/push_remote

        :param repo_name: name of repo

        :param revisions: list of revisions that we pushed

        """

        self._handle_rc_scm_extras(username, repo_name, repo_alias=repo.alias, action=action)

    def _get_IMC_module(self, scm_type):

        """

        Returns InMemoryCommit class based on scm_type

        :param scm_type:

        """

        if scm_type == 'hg':

            from kallithea.lib.vcs.backends.hg import MercurialInMemoryChangeset

            return MercurialInMemoryChangeset

        if scm_type == 'git':

            from kallithea.lib.vcs.backends.git import GitInMemoryChangeset

            return GitInMemoryChangeset

        raise Exception('Invalid scm_type, must be one of hg,git got %s'

                        % (scm_type,))

    def pull_changes(self, repo, username, clone_uri=None):

        """

        Pull from "clone URL" or fork origin.

        """

        dbrepo = self.__get_repo(repo)

        if clone_uri is None:

            clone_uri = dbrepo.clone_uri or dbrepo.fork and dbrepo.fork.repo_full_path

        if not clone_uri:

            raise Exception("This repository doesn't have a clone uri")

        repo = dbrepo.scm_instance

        repo_name = dbrepo.repo_name

        try:

            if repo.alias == 'git':

                repo.fetch(clone_uri)

                # git doesn't really have something like post-fetch action

                self._handle_push(repo,

                                  username=username,

                                  action='push_remote',

                                  repo_name=repo_name,

                                  revisions=[])

            else:

                self._handle_rc_scm_extras(username, dbrepo.repo_name,

                                           repo.alias, action='push_remote')

                repo.pull(clone_uri)

            self.mark_for_invalidation(repo_name)

        except Exception:

            log.error(traceback.format_exc())

            raise

    def commit_change(self, repo, repo_name, cs, user, author, message,

                      content, f_path):

        """

        Commit a change to a single file

        :param repo: a db_repo.scm_instance

        """

        user = User.guess_instance(user)

        IMC = self._get_IMC_module(repo.alias)

        # decoding here will force that we have proper encoded values

        # in any other case this will throw exceptions and deny commit

        content = safe_str(content)

        path = safe_str(f_path)

        # message and author needs to be unicode

        # proper backend should then translate that into required type

        message = safe_unicode(message)

        author = safe_unicode(author)

        imc = IMC(repo)

        imc.change(FileNode(path, content, mode=cs.get_file_mode(f_path)))

        try:

            tip = imc.commit(message=message, author=author,

                             parents=[cs], branch=cs.branch)

        except Exception as e:

            log.error(traceback.format_exc())

            raise IMCCommitError(str(e))

        finally:

            # always clear caches, if commit fails we want fresh object also

            self.mark_for_invalidation(repo_name)

        self._handle_push(repo,

                          username=user.username,

                          action='push_local',

                          repo_name=repo_name,