from datetime import datetime, timedelta

from django.core.cache import cache
from django.shortcuts import render


def stats(request):
    stats = cache.get('stats')
    status = 503
    current_age = None
    current_age_text = None

    if stats:
        status = 200
        if 'last_updated' in stats:
            current_age = datetime.now() - stats['last_updated']
            if current_age < timedelta(minutes=1):
                current_age_text = 'Stats were updated less than a minute ago.'
            elif current_age < timedelta(minutes=2):
                current_age_text = 'Stats were updated one minute ago.'
            elif current_age < timedelta(minutes=60):
                minutes = current_age.seconds / 60
                current_age_text = 'Stats were updated {:.0f} minutes ago.'.format(minutes)
            else:
                current_age_text = 'Stats were updated more than an hour ago'

    data = {'stats': stats, 'current_age': current_age, 'current_age_text': current_age_text}
    return render(request, 'stats/stats.html', data, status=status)