from datetime import datetime

from flask import Blueprint, jsonify, request

from app.dao.fact_notification_status_dao import fetch_notification_status_totals_for_all_services
from app.errors import register_errors
from app.platform_stats.platform_stats_schema import platform_stats_request
from app.service.statistics import format_admin_stats
from app.schema_validation import validate

platform_stats_blueprint = Blueprint('platform_stats', __name__)

register_errors(platform_stats_blueprint)


@platform_stats_blueprint.route('')
def get_platform_stats():
    if request.args:
        validate(request.args, platform_stats_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()
    data = fetch_notification_status_totals_for_all_services(start_date=start_date, end_date=end_date)
    stats = format_admin_stats(data)

    return jsonify(stats)