import os
import datetime
import docutils.core
from docutils.writers import s5_html

import zope.component
from zope.traversing.browser import absoluteURL
from zope.publisher.browser import BrowserPage
from zope.formlib.form import Fields, applyChanges
from zope.i18nmessageid import MessageFactory
_ = MessageFactory('sfive')

try:
    from Products.Five.formlib.formbase import AddForm, EditForm
except ImportError:
    from zope.formlib.form import AddForm, EditForm

from sfive.interfaces import IPresentation

class ViewPresentation(BrowserPage):

    def __call__(self):
        # Zope 3 assumes text/plain as content type
        response = getattr(self.request, 'RESPONSE', self.request.response)
        response.setHeader('Content-Type', 'text/html')

        return docutils.core.publish_string(
            self.context.text,
            writer = s5_html.Writer(),
            settings_overrides = {
                'input_encoding': 'unicode',
                'output_encoding': 'unicode',
                'theme': None,
                'theme_url': (absoluteURL(self.context, self.request) +
                              '/++resource++s5ui') # this is lame
                }
            )

    def todaysDate(self):
        today = datetime.date.today()
        #XXX should use locale formatter here
        return today.strftime("%d %b %Y")

class AddPresentation(AddForm):
    form_fields = Fields(IPresentation)
    label = _(u'Add Presentation')

    def create(self, data):
        presentation = zope.component.createObject(u'sfive.Presentation')
        applyChanges(presentation, self.form_fields, data)
        return presentation

class EditPresentation(EditForm):
    form_fields = Fields(IPresentation)
    label = _(u'Edit Presentation')