# -*- coding: utf-8 -*-
# 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, either version 3 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
"""
kallithea.controllers.summary
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Summary controller for Rhodecode

:created_on: Apr 18, 2010
:author: marcink
:copyright: (c) 2013 RhodeCode GmbH.
:license: GPLv3, see LICENSE.md for more details.
"""

import traceback
import calendar
import logging
import urllib
from time import mktime
from datetime import timedelta, date
from urlparse import urlparse

from pylons import tmpl_context as c, request, url, config
from pylons.i18n.translation import _
from webob.exc import HTTPBadRequest

from beaker.cache import cache_region, region_invalidate

from kallithea.lib.compat import product
from kallithea.lib.vcs.exceptions import ChangesetError, EmptyRepositoryError, \
    NodeDoesNotExistError
from kallithea.config.conf import ALL_READMES, ALL_EXTS, LANGUAGES_EXTENSIONS_MAP
from kallithea.model.db import Statistics, CacheInvalidation, User
from kallithea.lib.utils import jsonify
from kallithea.lib.utils2 import safe_unicode, safe_str
from kallithea.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator,\
    NotAnonymous
from kallithea.lib.base import BaseRepoController, render
from kallithea.lib.vcs.backends.base import EmptyChangeset
from kallithea.lib.markup_renderer import MarkupRenderer
from kallithea.lib.celerylib import run_task
from kallithea.lib.celerylib.tasks import get_commits_stats
from kallithea.lib.compat import json
from kallithea.lib.vcs.nodes import FileNode
from kallithea.controllers.changelog import _load_changelog_summary

log = logging.getLogger(__name__)

README_FILES = [''.join([x[0][0], x[1][0]]) for x in
                    sorted(list(product(ALL_READMES, ALL_EXTS)),
                           key=lambda y:y[0][1] + y[1][1])]


class SummaryController(BaseRepoController):

    def __before__(self):
        super(SummaryController, self).__before__()

    def _get_download_links(self, repo):

        download_l = []

        branches_group = ([], _("Branches"))
        tags_group = ([], _("Tags"))

        for name, chs in c.db_repo_scm_instance.branches.items():
            #chs = chs.split(':')[-1]
            branches_group[0].append((chs, name),)
        download_l.append(branches_group)

        for name, chs in c.db_repo_scm_instance.tags.items():
            #chs = chs.split(':')[-1]
            tags_group[0].append((chs, name),)
        download_l.append(tags_group)

        return download_l

    def __get_readme_data(self, db_repo):
        repo_name = db_repo.repo_name
        log.debug('Looking for README file')

        @cache_region('long_term')
        def _get_readme_from_cache(key, kind):
            readme_data = None
            readme_file = None
            try:
                # gets the landing revision! or tip if fails
                cs = db_repo.get_landing_changeset()
                if isinstance(cs, EmptyChangeset):
                    raise EmptyRepositoryError()
                renderer = MarkupRenderer()
                for f in README_FILES:
                    try:
                        readme = cs.get_node(f)
                        if not isinstance(readme, FileNode):
                            continue
                        readme_file = f
                        log.debug('Found README file `%s` rendering...' %
                                  readme_file)
                        readme_data = renderer.render(readme.content,
                                                      filename=f)
                        break
                    except NodeDoesNotExistError:
                        continue
            except ChangesetError:
                log.error(traceback.format_exc())
                pass
            except EmptyRepositoryError:
                pass
            except Exception:
                log.error(traceback.format_exc())

            return readme_data, readme_file

        kind = 'README'
        valid = CacheInvalidation.test_and_set_valid(repo_name, kind)
        if not valid:
            region_invalidate(_get_readme_from_cache, None, repo_name, kind)
        return _get_readme_from_cache(repo_name, kind)

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                   'repository.admin')
    def index(self, repo_name):
        _load_changelog_summary()

        username = ''
        if self.authuser.username != User.DEFAULT_USER:
            username = safe_str(self.authuser.username)

        _def_clone_uri = _def_clone_uri_by_id = c.clone_uri_tmpl
        if '{repo}' in _def_clone_uri:
            _def_clone_uri_by_id = _def_clone_uri.replace('{repo}', '_{repoid}')
        elif '{repoid}' in _def_clone_uri:
            _def_clone_uri_by_id = _def_clone_uri.replace('_{repoid}', '{repo}')

        c.clone_repo_url = c.db_repo.clone_url(user=username,
                                                uri_tmpl=_def_clone_uri)
        c.clone_repo_url_id = c.db_repo.clone_url(user=username,
                                                uri_tmpl=_def_clone_uri_by_id)

        if c.db_repo.enable_statistics:
            c.show_stats = True
        else:
            c.show_stats = False

        stats = self.sa.query(Statistics)\
            .filter(Statistics.repository == c.db_repo)\
            .scalar()

        c.stats_percentage = 0

        if stats and stats.languages:
            c.no_data = False is c.db_repo.enable_statistics
            lang_stats_d = json.loads(stats.languages)

            lang_stats = ((x, {"count": y,
                               "desc": LANGUAGES_EXTENSIONS_MAP.get(x)})
                          for x, y in lang_stats_d.items())

            c.trending_languages = json.dumps(
                sorted(lang_stats, reverse=True, key=lambda k: k[1])[:10]
            )
        else:
            c.no_data = True
            c.trending_languages = json.dumps({})

        c.enable_downloads = c.db_repo.enable_downloads
        c.readme_data, c.readme_file = \
            self.__get_readme_data(c.db_repo)
        return render('summary/summary.html')

    @LoginRequired()
    @NotAnonymous()
    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                   'repository.admin')
    @jsonify
    def repo_size(self, repo_name):
        if request.is_xhr:
            return c.db_repo._repo_size()
        else:
            raise HTTPBadRequest()

    @LoginRequired()
    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                   'repository.admin')
    def statistics(self, repo_name):
        if c.db_repo.enable_statistics:
            c.show_stats = True
            c.no_data_msg = _('No data loaded yet')
        else:
            c.show_stats = False
            c.no_data_msg = _('Statistics are disabled for this repository')

        td = date.today() + timedelta(days=1)
        td_1m = td - timedelta(days=calendar.mdays[td.month])
        td_1y = td - timedelta(days=365)

        ts_min_m = mktime(td_1m.timetuple())
        ts_min_y = mktime(td_1y.timetuple())
        ts_max_y = mktime(td.timetuple())
        c.ts_min = ts_min_m
        c.ts_max = ts_max_y

        stats = self.sa.query(Statistics)\
            .filter(Statistics.repository == c.db_repo)\
            .scalar()
        if stats and stats.languages:
            c.no_data = False is c.db_repo.enable_statistics
            lang_stats_d = json.loads(stats.languages)
            c.commit_data = stats.commit_activity
            c.overview_data = stats.commit_activity_combined

            lang_stats = ((x, {"count": y,
                               "desc": LANGUAGES_EXTENSIONS_MAP.get(x)})
                          for x, y in lang_stats_d.items())

            c.trending_languages = json.dumps(
                sorted(lang_stats, reverse=True, key=lambda k: k[1])[:10]
            )
            last_rev = stats.stat_on_revision + 1
            c.repo_last_rev = c.db_repo_scm_instance.count()\
                if c.db_repo_scm_instance.revisions else 0
            if last_rev == 0 or c.repo_last_rev == 0:
                pass
            else:
                c.stats_percentage = '%.2f' % ((float((last_rev)) /
                                                c.repo_last_rev) * 100)
        else:
            c.commit_data = json.dumps({})
            c.overview_data = json.dumps([[ts_min_y, 0], [ts_max_y, 10]])
            c.trending_languages = json.dumps({})
            c.no_data = True

        recurse_limit = 500  # don't recurse more than 500 times when parsing
        run_task(get_commits_stats, c.db_repo.repo_name, ts_min_y,
                 ts_max_y, recurse_limit)
        return render('summary/statistics.html')