from Acquisition import aq_inner, aq_parent

from Products.Five.browser import BrowserView
from Products.Five.browser.pagetemplatefile import ViewPageTemplateFile

from Products.CMFCore.utils import getToolByName

from Products.CMFPlone import PloneMessageFactory as _

from Products.statusmessages.interfaces import IStatusMessage

class View(BrowserView):
    """Moderation View
    """

    template = ViewPageTemplateFile('moderation.pt')
    try:
        template.id = '@@moderate-comments'
    except AttributeError:
        # id is not writeable in Zope 2.12
        pass

    def __call__(self):
        # Hide the editable-object border
        self.request.set('disable_border', True)

        context = aq_inner(self.context)

        if self.request.has_key('form.button.Filter'):
            self.filter = self.request.get('form.button.Filter')
            if self.filter == 'pending':
                self.comments = self.comments_pending()
            elif self.filter == "published":
                self.comments = self.comments_published()
            else:
                raise ValueError('Value %s for filter is not know.' % self.filter)
        else:
            self.comments = self.comments_all()
        return self.template()

    def cook(self, text):
        return text

    def moderation_enabled(self):
        """Returns true if comment moderation workflow is
           enabled on 'Discussion Item' content type.
        """
        context = aq_inner(self.context)
        wf_tool = getToolByName(context, 'portal_workflow')
        if wf_tool.getChainForPortalType('Discussion Item') \
            == ('comment_review_workflow',):
            return True
        else:
            return False

    def comments_all(self, start=0, size=None):
        """Returns all comments.
        """
        self.state = self.request.get('review_state', 'pending')
        self.transition = self.request.get('publish_transition', 'publish')
        self.limit = self.request.get('limit', 100)

        context = aq_inner(self.context)
        catalog = getToolByName(context, 'portal_catalog')

        return catalog(
                portal_type='Discussion Item',
                sort_on='created',
                sort_order='reverse',
            )

    def comments_pending(self, start=0, size=None):
        """Returns all comments with 'pending' review state.
        """
        self.state = self.request.get('review_state', 'pending')
        self.transition = self.request.get('publish_transition', 'publish')
        self.limit = self.request.get('limit', 100)

        context = aq_inner(self.context)
        catalog = getToolByName(context, 'portal_catalog')

        return catalog(
                portal_type='Discussion Item',
                review_state=self.state,
                sort_on='created',
                sort_order='reverse',
            )

    def comments_published(self, start=0, size=None):
        """Returns all comments with 'published' review state.
        """
        self.state = self.request.get('review_state', 'pending')
        self.transition = self.request.get('publish_transition', 'pending')
        self.limit = self.request.get('limit', 100)

        context = aq_inner(self.context)
        catalog = getToolByName(context, 'portal_catalog')

        return catalog(
                portal_type='Discussion Item',
                review_state='published',
                sort_on='created',
                sort_order='reverse',
            )

    def comments_spam(self, start=0, size=None):
        """Returns all comments that are marked as spam.

           Not implemented yet.
        """
        return None


class DeleteComment(BrowserView):
    """Delete a comment from a conversation
    """

    def __call__(self):

        context = aq_inner(self.context)
        comment_id = self.context.id

        conversation = aq_parent(context)

        del conversation[comment_id]

        IStatusMessage(self.context.REQUEST).addStatusMessage(
            _("Comment deleted."),
            type="info")

        return self.context.REQUEST.RESPONSE.redirect(self.context.REQUEST.HTTP_REFERER)

class PublishComment(BrowserView):
    """Publish a comment
    """

    def __call__(self):

        comment = aq_inner(self.context)
        comment_id = self.context.id

        workflow_action = self.request.form['workflow_action']
        portal_workflow = getToolByName(comment, 'portal_workflow')
        portal_workflow.doActionFor(comment, workflow_action)

        catalog = getToolByName(comment, 'portal_catalog')
        catalog.reindexObject(comment)

        IStatusMessage(self.context.REQUEST).addStatusMessage(
            _("Comment published."),
            type="info")

        return self.context.REQUEST.RESPONSE.redirect(self.context.REQUEST.HTTP_REFERER)

class BulkActionsView(BrowserView):
    """Bulk actions (unapprove, approve, delete, mark as spam).
    """

    def __call__(self):

        context = aq_inner(self.context)

        if self.request.has_key('form.select.BulkAction'):

            bulkaction = self.request.get('form.select.BulkAction')

            self.paths = self.request.get('paths')
            if self.paths:
                if bulkaction == '-1':
                    # no bulk action was selected
                    pass
                elif bulkaction == 'retract':
                    self.retract()
                elif bulkaction == 'publish':
                    self.publish()
                elif bulkaction == 'mark_as_spam':
                    self.mark_as_spam()
                elif bulkaction == 'delete':
                    self.delete()
                else:
                    raise KeyError

    def retract(self):
        raise NotImplementedError

    def publish(self):
        context = aq_inner(self.context)
        for path in self.paths:
            comment = context.restrictedTraverse(path)
            portal_workflow = getToolByName(comment, 'portal_workflow')
            current_state = portal_workflow.getInfoFor(comment, 'review_state')
            if current_state != 'published':
                portal_workflow.doActionFor(comment, 'publish')
            catalog = getToolByName(comment, 'portal_catalog')
            catalog.reindexObject(comment)

    def mark_as_spam(self):
        raise NotImplementedError

    def delete(self):
        context = aq_inner(self.context)
        for path in self.paths:
            comment = context.restrictedTraverse(path)
            conversation = aq_parent(comment)
            del conversation[comment.id]