import datetime
from django.utils import translation
from django.core.cache import cache
from hvad.models import TranslationManager


class ThemeActiveManager(TranslationManager):
    """
    manager works only with active themes
    models where theme defines activity:
        - exposition
    """
    cache_time = 600
    def all(self):
        lang = translation.get_language()
        qs = super(ThemeActiveManager, self).select_related('exposition_themes').\
            filter(exposition_themes__theme__isnull=False, translations__language_code=lang, )\
            .order_by('translations__name').distinct()
        return qs

    def expo_main_page(self):
        Model = self.model
        return list(self.language().filter(types=Model.types.exposition)[:6])

    def conference_main_page(self):
        Model = self.model
        return list(self.language().filter(types=Model.types.conference)[:6])

    def expo_themes(self):
        lang = translation.get_language()
        key = 'used_expo_themes_%s'%lang
        cached_themes = cache.get(key)
        if cached_themes:
            return cached_themes
        else:
            from exposition.models import Exposition
            themes_id = [item['theme_id'] for item in Exposition.objects.values('theme').distinct()]
            themes = list(self.language().filter(id__in=themes_id))
            cache.set(key, themes, 300)
            return themes
    """
    def expo_themes_with_count(self):
        lang = translation.get_language()
        key = 'used_expo_themes_count_%s'%lang
        cached_themes = cache.get(key)
        if cached_themes:
            return cached_themes
        else:

            from exposition.models import Exposition
            sql = {'expo_count': 'SELECT COUNT(*) FROM exposition_exposition_theme WHERE exposition_exposition_theme.theme_id = theme_theme.id'}
            # id of unique cities
            themes_id = [item['theme'] for item in Exposition.objects.values('theme').distinct()]
            themes = list(self.language().filter(id__in=themes_id).extra(select=sql))
            cache.set(key, themes, 300)
            return themes
    """
    def expo_themes_with_count(self):
        lang = translation.get_language()
        key = 'used_expo_themes_count_%s'%lang
        cached_themes = cache.get(key)
        if cached_themes:
            return cached_themes
        else:

            from exposition.models import Exposition
            now = datetime.datetime.now().date()
            # id of unique cities
            themes_id = [item['theme'] for item in Exposition.objects.filter(is_published=True, data_end__gte=now).values('theme').distinct()]
            #themes = set(list(self.language().filter(id__in=themes_id).extra(select=sql)))
            themes = set(list(self.language().filter(id__in=themes_id)))
            themes = sorted(themes, key=lambda x: x.name)
            cache.set(key, themes, self.cache_time)
            return themes

    def conference_themes_with_count(self):
        lang = translation.get_language()
        key = 'used_conference_themes_count_%s'%lang
        cached_themes = cache.get(key)
        if cached_themes:
            return cached_themes
        else:
            from conference.models import Conference
            now = datetime.datetime.now().date()
            # id of unique cities
            themes_id = [item['theme'] for item in Conference.objects.filter(is_published=True, data_end__gte=now).values('theme').distinct()]
            #themes = set(list(self.language().filter(id__in=themes_id).extra(select=sql)))
            themes = set(list(self.language().filter(id__in=themes_id)))
            themes = sorted(themes, key=lambda x: x.name)
            cache.set(key, themes, self.cache_time)
            return themes


class TagActiveManager(TranslationManager):
    """
    manager works only with active themes
    models where theme defines activity:
        - exposition
    """
    cache_time = 600
    def all(self):
        lang = translation.get_language()
        qs = super(TagActiveManager, self).select_related('exposition_tags').\
            filter(exposition_tags__tag__isnull=False, translations__language_code=lang, )\
            .order_by('translations__name').distinct()
        return qs

    def expo_tag(self):
        lang = translation.get_language()
        key = 'used_expo_tags_%s'%lang
        cached_tags = cache.get(key)
        if cached_tags:
            return cached_tags
        else:
            from exposition.models import Exposition
            tag_id = [item['tag'] for item in Exposition.enable.upcoming().values('tag').distinct()]
            tags = list(self.language().filter(id__in=tag_id))
            cache.set(key, tags, 300)
            return tags


    def conference_tags(self):
        lang = translation.get_language()
        key = 'used_conference_tags_count_%s'%lang
        cached_tags = cache.get(key)
        if cached_tags:
            return cached_tags
        else:
            from conference.models import Conference
            now = datetime.datetime.now().date()
            # id of unique cities
            tag_id = [item['tag'] for item in Conference.objects.filter(is_published=True, data_end__gte=now).values('tag').distinct()]
            #themes = set(list(self.language().filter(id__in=themes_id).extra(select=sql)))
            tags = set(list(self.language().filter(id__in=tag_id)))
            tags = sorted(tags, key=lambda x: x.name)
            cache.set(key, tags, self.cache_time)
            return tags