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import datetime
import itertools
import operator

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

from model.queues import Queue
from model import queuestatus


class ActiveBots(webapp.RequestHandler):
    def get(self):
        # 2000 is the GAE record fetch limit.
        recent_statuses = queuestatus.QueueStatus.all().order("-date").fetch(500)
        queue_name_to_last_status = {}
        for status in recent_statuses:
            last_status = queue_name_to_last_status.get(status.bot_id)
            if not last_status or status.date > last_status.date:
                queue_name_to_last_status[status.bot_id] = status

        sorted_by_bot_id = sorted(queue_name_to_last_status.values(), key=operator.attrgetter('bot_id'))
        # Sorted is stable, so this will be sorted by bot_id, groupped by sorted queue_name.
        sorted_by_queue_name = sorted(sorted_by_bot_id, key=operator.attrgetter('queue_name'))
        template_values = {
            "last_statuses": sorted_by_queue_name,
        }
        self.response.out.write(template.render("templates/activebots.html", template_values))