# -*- coding: utf-8 -*-

from datetime import datetime, timedelta

class Feed(object):
    @staticmethod
    def get_unread(database):
        query = """ 
            FOR feed_entry_doc IN feed_entry
                FOR feed_doc IN feed
                    FILTER feed_entry_doc.read == false
                    AND feed_entry_doc.feed == feed_doc._key
                    RETURN DISTINCT feed_doc"""
        results = database.AQLQuery(query)
        return [Feed(doc) for doc in results]

    @staticmethod
    def all_pending_update(database):
        query = """
        FOR feed_doc IN feed
            FILTER DATE_ISO8601(DATE_NOW()) > feed_doc.next_update
            RETURN feed_doc
        """
        results = database.AQLQuery(query)
        return [Feed(doc) for doc in results]

    def __init__(self, document):
        super(Feed, self).__init__()
        self.document = document

    def __getattr__(self, attribute):
        return self.document[attribute]

    def increment_next_update_date(self):
        updateInterval = self._updateIntervalInSeconds()
        delta = timedelta(seconds=updateInterval)
        next_update = datetime.now() + delta
        self.document['next_update'] = next_update.strftime('%Y-%m-%dT%H:%M:%S.000')
        self.document.patch()

    def _updateIntervalInSeconds(self):
        return self.update_interval * 60