from kallithea.lib.celerylib.tasks import get_commits_stats

from kallithea.lib.markup_renderer import MarkupRenderer

from kallithea.lib.page import Page

from kallithea.lib.utils2 import safe_int, safe_unicode

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

from kallithea.lib.vcs.exceptions import ChangesetError, EmptyRepositoryError, NodeDoesNotExistError

from kallithea.lib.vcs.nodes import FileNode

from kallithea.model.db import Statistics

log = logging.getLogger(__name__)

README_FILES = [''.join([x[0][0], x[1][0]]) for x in

                    sorted(list(itertools.product(ALL_READMES, ALL_EXTS)),

                           key=lambda y:y[0][1] + y[1][1])]

class SummaryController(BaseRepoController):

    def __get_readme_data(self, db_repo):

        repo_name = db_repo.repo_name

        log.debug('Looking for README file')

        @cache_region('long_term', '_get_readme_from_cache')

        def _get_readme_from_cache(*_cache_keys):  # parameters are not really used - only as caching key

            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(safe_unicode(readme.content),

                                                      filename=f)

                        break

                    except NodeDoesNotExistError:

                        continue

            except ChangesetError:

                log.error(traceback.format_exc())

                pass

            except EmptyRepositoryError:

                pass

            return readme_data, readme_file

        kind = 'README'

        return _get_readme_from_cache(repo_name, kind, c.db_repo.changeset_cache.get('raw_id'))

    @LoginRequired(allow_default_user=True)

    @HasRepoPermissionLevelDecorator('read')

    def index(self, repo_name):

        p = safe_int(request.GET.get('page'), 1)

        size = safe_int(request.GET.get('size'), 10)

        try:

            collection = c.db_repo_scm_instance.get_changesets(reverse=True)

        except EmptyRepositoryError as e:

            h.flash(e, category='warning')

            collection = []

        c.cs_pagination = Page(collection, page=p, items_per_page=size)

        page_revisions = [x.raw_id for x in list(c.cs_pagination)]

        c.cs_comments = c.db_repo.get_comments(page_revisions)

        c.cs_statuses = c.db_repo.statuses(page_revisions)

        c.ssh_repo_url = None

        if request.authuser.is_default_user:

            username = None

        else:

            username = request.authuser.username

            if c.ssh_enabled:

                c.ssh_repo_url = c.db_repo.clone_url(clone_uri_tmpl=c.clone_ssh_tmpl)

        c.clone_repo_url = c.db_repo.clone_url(clone_uri_tmpl=c.clone_uri_tmpl, with_id=False, username=username)

        c.clone_repo_url_id = c.db_repo.clone_url(clone_uri_tmpl=c.clone_uri_tmpl, with_id=True, username=username)

        if c.db_repo.enable_statistics:

            c.show_stats = True

        else:

            c.show_stats = False

        stats = Statistics.query() \

            .filter(Statistics.repository == c.db_repo) \

            .scalar()

        c.stats_percentage = 0

        if stats and stats.languages:

            lang_stats_d = ext_json.loads(stats.languages)

            lang_stats = [(x, {"count": y,

                               "desc": LANGUAGES_EXTENSIONS_MAP.get(x, '?')})

                          for x, y in lang_stats_d.items()]

            lang_stats.sort(key=lambda k: (-k[1]['count'], k[0]))

            c.trending_languages = lang_stats[:10]

        else:

            c.trending_languages = []

        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()

    @HasRepoPermissionLevelDecorator('read')

    @jsonify

    def repo_size(self, repo_name):

        if request.is_xhr:

            return c.db_repo._repo_size()

        else:

            raise HTTPBadRequest()

    @LoginRequired(allow_default_user=True)

    @HasRepoPermissionLevelDecorator('read')

    def statistics(self, repo_name):

        if c.db_repo.enable_statistics:

            c.show_stats = True

            c.no_data_msg = _('No data ready 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 = Statistics.query() \

            .filter(Statistics.repository == c.db_repo) \

            .scalar()

        c.stats_percentage = 0

        if stats and stats.languages:

            c.commit_data = ext_json.loads(stats.commit_activity)

            c.overview_data = ext_json.loads(stats.commit_activity_combined)

            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 = {}

            c.overview_data = ([[ts_min_y, 0], [ts_max_y, 10]])

            c.trending_languages = []

        recurse_limit = 500  # don't recurse more than 500 times when parsing

        get_commits_stats(c.db_repo.repo_name, ts_min_y, ts_max_y, recurse_limit)

        return render('summary/statistics.html')