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from google.appengine.ext import webapp, db
from google.appengine.ext.webapp import template

from handlers.updatebase import UpdateBase
from model.queues import Queue
from model.workitems import WorkItems

from datetime import datetime


class UpdateWorkItems(UpdateBase):
    def get(self):
        self.response.out.write(template.render("templates/updateworkitems.html", None))

    def _parse_work_items_string(self, items_string):
        # Our parsing could be much more robust.
        item_strings = items_string.split(" ") if items_string else []
        return map(int, item_strings)

    def _work_items_from_request(self):
        queue_name = self.request.get("queue_name")
        queue = Queue.queue_with_name(queue_name)
        if not queue:
            self.response.out.write("\"%s\" is not in queues %s" % (queue_name, Queue.all()))
            return None

        items_string = self.request.get("work_items")
        work_items = queue.work_items()
        work_items.item_ids = self._parse_work_items_string(items_string)
        work_items.date = datetime.now()
        return work_items

    def post(self):
        work_items = self._work_items_from_request()
        if not work_items:
            self.response.set_status(500)
            return
        work_items.put()