import logging
import os

import requests
from django.conf import settings
from django.db import transaction
from django.utils import timezone
from yandex_money.models import Payment

from finance.loggers import FinanceLogger
from finance.models import InvoiceRebilling, Invoice
from lms import celery_app

finance_logger = FinanceLogger()


@celery_app.task
def periodic_billing():
        finance_logger.info("start periodic billing task")
        # TODO заюзать Invoice.BILL_STATUSES
        invoices = InvoiceRebilling.objects.filter(method='Y', status='W')
        # TODO тут был exclude('F') то есть все неоплаченные... но это не верно!
        for invoice in invoices.filter(expected_date__lt=timezone.now()):
            # выбираем все необработанные из прошлого
            with transaction.atomic():
                try:
                    _yandex_repeat_card_payment(invoice)
                except Exception as exc:
                    finance_logger.exception('YandexMoney repeatCardPayment Exception', invoice_id=invoice.id)
                    invoice.comment = 'Ошибка при попытке повторного платежа, свяжитесь с клиентской службой'
                invoice.save()


def _yandex_repeat_card_payment(invoice):
    user = invoice.bill.user
    yandex_pay = Payment.objects.create(
        order_amount=invoice.price,
        customer_number=user.id,
        user=user,
        cps_email=user.email,
        shop_id=settings.YANDEX_MONEY_REBILLING_SHOP_ID,
        scid=settings.YANDEX_MONEY_REBILLING_SCID
    )
    invoice.yandex_pay = yandex_pay

    finance_logger.info('YandexMoney repeatCardPayment start', invoice_id=invoice.id)
    resp = requests.post(
        url=settings.YANDEX_MONEY_MWS_URL + 'repeatCardPayment',
        data={
            'clientOrderId': invoice.id,  # уникальное возрастающее целое число
            'invoiceId': invoice.key,
            'amount': invoice.price,
            'orderNumber': invoice.yandex_pay.order_number
        },
        cert=(
            os.path.join(settings.SSL_ROOT, 'skillbox.cer'),
            os.path.join(settings.SSL_ROOT, 'skillbox.key')
        ),
        verify=os.path.join(settings.SSL_ROOT, 'yamoney_chain.cer')
    )
    resp_text = resp.text
    finance_logger.info('YandexMoney repeatCardPayment response',
                        invoice_id=invoice.id, response=resp_text, code=resp.status_code, )
    try:
        _check_yandex_response_status(invoice, resp_text)
    except Exception as exc:
        finance_logger.exception("Can't parse yandex response", invoice_id=invoice.id, response=resp_text)


def _check_yandex_response_status(invoice, resp_text):
    from xml.dom import minidom
    dom = minidom.parseString(resp_text)
    dom.normalize()
    resp_node = dom.getElementsByTagName("repeatCardPaymentResponse")[0]
    status = resp_node.getAttribute('status')
    if status != '0':
        error = resp_node.getAttribute('error')
        processed_dt = resp_node.getAttribute('processedDT')
        tech_message = resp_node.getAttribute('techMessage')
        invoice.status += Invoice.BILL_STATUSES[-1][0]
        invoice.comment += 'Yandex Kassa: ошибка № {}, сообщение {} от {}'.format(error, tech_message, processed_dt)