from django.db import models
from django.utils.encoding import force_text
from django.utils.text import Truncator

from cms.models import Page

from .utils import strip_tags


LANGUAGE = 'ru'


class PageProxy(Page):
    """Proxy model for Page.
        Add a prefix `proxy_` to method names to avoid base class override.
    """
    class Meta:
        proxy = True

    def proxy_get_content(self):
        if getattr(self, '_cache_content', None) is None:
            content = [
                plugin.render_plugin().strip()
                    for placeholder in self.placeholders.all()
                        for plugin in placeholder.get_plugins()
                            if plugin.plugin_type == u'TextPlugin'
            ]
            self._cache_content = strip_tags(' '.join(content).strip())
        return self._cache_content

    def proxy_get_teaser(self):
        if getattr(self, '_cache_teaser', None) is None:
            self._cache_teaser = Truncator(self.proxy_get_content()).chars(500)
        return self._cache_teaser

    def proxy_get_title(self):
        return super(PageProxy, self).get_title(language=LANGUAGE)

    def proxy_get_path(self):
        return super(PageProxy, self).get_path(language=LANGUAGE)