#!/usr/bin/env python

# encoding: utf-8

# Model for hg app

# Copyright (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>

# 

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; version 2

# of the License or (at your opinion) any later version of the license.

# 

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# 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, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

# MA  02110-1301, USA.

"""

Created on April 9, 2010

Model for hg app

@author: marcink

"""

from beaker.cache import cache_region

from mercurial import ui

from mercurial.hgweb.hgwebdir_mod import findrepos

from pylons.i18n.translation import _

from pylons_app.lib.auth import HasRepoPermissionAny

from pylons_app.model import meta

from pylons_app.model.db import Repository, User

from pylons_app.lib import helpers as h

from vcs.exceptions import RepositoryError, VCSError

import logging

import os

import sys

log = logging.getLogger(__name__)

try:

    from vcs.backends.hg import MercurialRepository

except ImportError:

    sys.stderr.write('You have to import vcs module')

    raise Exception('Unable to import vcs')

def _get_repos_cached_initial(app_globals, initial):

    """return cached dict with repos

    """

    g = app_globals

    return HgModel.repo_scan(g.paths[0][0], g.paths[0][1], g.baseui, initial)

@cache_region('long_term', 'cached_repo_list')

def _get_repos_cached():

    """return cached dict with repos

    """

    log.info('getting all repositories list')

    from pylons import app_globals as g

    return HgModel.repo_scan(g.paths[0][0], g.paths[0][1], g.baseui)

@cache_region('super_short_term', 'cached_repos_switcher_list')

def _get_repos_switcher_cached(cached_repo_list):

    repos_lst = []

        if HasRepoPermissionAny('repository.write', 'repository.read',

                    'repository.admin')(repo.name.lower(), 'main page check'):

@cache_region('long_term', 'full_changelog')

def _full_changelog_cached(repo_name):

    log.info('getting full changelog for %s', repo_name)

    return list(reversed(list(HgModel().get_repo(repo_name))))

class HgModel(object):

    """Mercurial Model

    """

    def __init__(self):

        pass

    @staticmethod

    def repo_scan(repos_prefix, repos_path, baseui, initial=False):

        """

        Listing of repositories in given path. This path should not be a 

        repository itself. Return a dictionary of repository objects

        :param repos_path: path to directory it could take syntax with 

        * or ** for deep recursive displaying repositories

        """

        sa = meta.Session()

        def check_repo_dir(path):

            """Checks the repository

            :param path:

            """

            repos_path = path.split('/')

            if repos_path[-1] in ['*', '**']:

                repos_path = repos_path[:-1]

            if repos_path[0] != '/':

                repos_path[0] = '/'

            if not os.path.isdir(os.path.join(*repos_path)):

                raise RepositoryError('Not a valid repository in %s' % path)        

        if not repos_path.endswith('*'):

            raise VCSError('You need to specify * or ** at the end of path '

                            'for recursive scanning')

        check_repo_dir(repos_path)

        log.info('scanning for repositories in %s', repos_path)

        repos = findrepos([(repos_prefix, repos_path)])

        if not isinstance(baseui, ui.ui):

            baseui = ui.ui()

        repos_list = {}

        for name, path in repos:

            try:

                #name = name.split('/')[-1]

                if repos_list.has_key(name):

                    raise RepositoryError('Duplicate repository name %s found in'

                                    ' %s' % (name, path))

                else:

                    repos_list[name] = MercurialRepository(path, baseui=baseui)

                    repos_list[name].name = name

                    dbrepo = None

                    if not initial:

                        dbrepo = sa.query(Repository)\

                            .filter(Repository.repo_name == name).scalar()

                    if dbrepo:

                        log.info('Adding db instance to cached list')

                        repos_list[name].dbrepo = dbrepo

                        repos_list[name].description = dbrepo.description

                        if dbrepo.user:

                            repos_list[name].contact = dbrepo.user.full_contact

                        else:

                            repos_list[name].contact = sa.query(User)\

                            .filter(User.admin == True).first().full_contact

            except OSError:

                continue

        meta.Session.remove()

        return repos_list

    def get_repos(self):

        for name, repo in _get_repos_cached().items():

            if repo._get_hidden():

                #skip hidden web repository

                continue

            last_change = repo.last_change

            tip = h.get_changeset_safe(repo, 'tip')

            tmp_d = {}

            tmp_d['name'] = repo.name

            tmp_d['name_sort'] = tmp_d['name'].lower()

            tmp_d['description'] = repo.description

            tmp_d['description_sort'] = tmp_d['description']

            tmp_d['last_change'] = last_change

            tmp_d['last_change_sort'] = last_change[1] - last_change[0]

            tmp_d['tip'] = tip.raw_id

            tmp_d['tip_sort'] = tip.revision 

            tmp_d['rev'] = tip.revision

            tmp_d['contact'] = repo.contact

            tmp_d['contact_sort'] = tmp_d['contact']

            tmp_d['repo_archives'] = list(repo._get_archives())

            tmp_d['last_msg'] = tip.message

            tmp_d['repo'] = repo

            yield tmp_d

    def get_repo(self, repo_name):

        return _get_repos_cached()[repo_name]