def get_performance_dashboard():
    # All statistics are as of last night this matches the existing performance platform
    # and avoids the need to query notifications.
    if request.args:
        # Is it ok to reuse this? - should probably create a new one
        validate(request.args, performance_dashboard_request)

    # If start and end date are not set, we are expecting today's stats.
    today = str(datetime.utcnow().date())

    start_date = datetime.strptime(request.args.get('start_date', today), '%Y-%m-%d').date()
    end_date = datetime.strptime(request.args.get('end_date', today), '%Y-%m-%d').date()
    total_for_all_time = get_total_notifications_for_date_range(start_date=None, end_date=None)
    total_notifications, emails, sms, letters = transform_results_into_totals(total_for_all_time)
    totals_for_date_range = get_total_notifications_for_date_range(start_date=start_date, end_date=end_date)
    processing_time_results = get_processing_time_percentage_for_date_range(start_date=start_date, end_date=end_date)
    services = get_live_services_with_organisation()
    stats = {
        "total_notifications": total_notifications,
        "email_notifications": emails,
        "sms_notifications": sms,
        "letter_notifications": letters,
        "notifications_by_type": transform_into_notification_by_type_json(totals_for_date_range),
        "processing_time": transform_processing_time_results_to_json(processing_time_results),
        "live_service_count": len(services),
        "services_using_notify": transform_services_to_json(services)

    }

    return jsonify(stats)