import datetime

from django.db import models
from django.utils.translation import gettext_lazy as _

from .enum import BankType, PaymentStatus

from order.models import OrderModel

class BankQuerySet(models.QuerySet):
    def __init__(self, *args, **kwargs):
        super(BankQuerySet, self).__init__(*args, **kwargs)

    def active(self):
        return self.filter()


class BankManager(models.Manager):
    def get_queryset(self):
        return BankQuerySet(self.model, using=self._db)

    def active(self):
        return self.get_queryset().active()

    def update_expire_records(self):
        count = (
            self.active()
            .filter(
                status=PaymentStatus.RETURN_FROM_BANK,
                update_at__lte=datetime.datetime.now() - datetime.timedelta(minutes=15),
            )
            .update(status=PaymentStatus.EXPIRE_VERIFY_PAYMENT)
        )

        count = count + self.active().filter(
            status=PaymentStatus.REDIRECT_TO_BANK,
            update_at__lt=datetime.datetime.now() - datetime.timedelta(minutes=15),
        ).update(status=PaymentStatus.EXPIRE_GATEWAY_TOKEN)
        return count

    def filter_return_from_bank(self):
        return self.active().filter(status=PaymentStatus.RETURN_FROM_BANK)


class Bank(models.Model):
    status = models.CharField(
        max_length=50,
        null=False,
        blank=False,
        choices=PaymentStatus.choices,
        verbose_name=_("Status"),
    )
    bank_type = models.CharField(
        max_length=50,
        choices=BankType.choices,
        verbose_name=_("Bank"),
    )
    # It's local and generate locally
    tracking_code = models.CharField(max_length=255, null=False, blank=False, verbose_name=_("Tracking code"))
    amount = models.CharField(max_length=10, null=False, blank=False, verbose_name=_("Amount"))
    # Reference number return from bank
    reference_number = models.CharField(
        unique=True,
        max_length=255,
        null=False,
        blank=False,
        verbose_name=_("Reference number"),
    )
    response_result = models.TextField(null=True, blank=True, verbose_name=_("Bank result"))
    callback_url = models.TextField(null=False, blank=False, verbose_name=_("Callback url"))
    extra_information = models.TextField(null=True, blank=True, verbose_name=_("Extra information"))
    bank_choose_identifier = models.CharField(
        max_length=255, blank=True, null=True, verbose_name=_("Bank choose identifier")
    )

    order = models.ForeignKey(OrderModel, on_delete=models.SET_NULL, null=True, blank=True ,related_name='bank_records', verbose_name='سفارش')

    created_at = models.DateTimeField(auto_now_add=True, editable=False, verbose_name=_("Created at"))
    update_at = models.DateTimeField(auto_now=True, editable=False, verbose_name=_("Updated at"))
    
    objects = BankManager()

    class Meta:
        verbose_name = _("Bank gateway")
        verbose_name_plural = _("Bank gateways")

    def __str__(self):
        return "{}-{}".format(self.pk, self.tracking_code)

    @property
    def is_success(self):
        return self.status == PaymentStatus.COMPLETE