## $Id: payment.py 12461 2015-01-13 09:09:24Z uli $
##
## Copyright (C) 2011 Uli Fouquet & Henrik Bettermann
## This program is free software; you can redistribute it and/or modify
## it under the terms of the GNU General Public License as published by
## the Free Software Foundation; either version 2 of the License, or
## (at your option) any later version.
##
## This program is distributed in the hope that it will be useful,
## but WITHOUT ANY WARRANTY; without even the implied warranty of
## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
## GNU General Public License for more details.
##
## You should have received a copy of the GNU General Public License
## along with this program; if not, write to the Free Software
## Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
##
"""
These are the payment tickets.
"""
import decimal
import grok
import uuid
from datetime import datetime
from zope.component import getUtilitiesFor
from zope.event import notify
from waeup.ikoba.utils.helpers import attrs_to_fields
from waeup.ikoba.payments.interfaces import (
    IPayment, STATE_UNPAID, STATE_FAILED, STATE_PAID,
    IPaymentGatewayService, IPayer, IPaymentItem,
    )
from waeup.ikoba.utils.logger import Logger


def get_payment_providers():
    """Get all services of payment gateways registered.
    """
    return dict(
        getUtilitiesFor(IPaymentGatewayService)
        )


class PaymentProviderServiceBase(grok.GlobalUtility):

    grok.baseclass()
    grok.implements(IPaymentGatewayService)

    title = u'Sample Credit Card Service'


class Payment(grok.Model, Logger):
    """This is a payment.
    """
    grok.implements(IPayment)
    grok.provides(IPayment)

    logger_name = 'waeup.ikoba.${sitename}.payments'
    logger_filename = 'payments.log'
    logger_format_str = '"%(asctime)s","%(user)s",%(message)s'

    def __init__(self):
        super(Payment, self).__init__()
        self.creation_date = datetime.utcnow()
        self.payment_date = None
        self.payment_id = u'PAY_' + unicode(uuid.uuid4().hex)
        self.gateway_service = None
        self.amount = decimal.Decimal("0.00")
        self.payed_item_id = None
        self.payer_id = None
        self.state = STATE_UNPAID
        return

    def approve(self, payment_date=None):
        """A payment was approved.

        Successful ending; the payment is marked as payed.

        If `payment_date` is given, it must be a datetime object
        giving a datetime in UTC timezone.

        Raises ObjectModifiedEvent.
        """
        if payment_date is None:
            payment_date = datetime.utcnow()
        self.payment_date = payment_date
        self.state = STATE_PAID
        notify(grok.ObjectModifiedEvent(self))

    def mark_failed(self, reason=None):
        """Mark payment as failed.

        Raises ObjectModifiedEvent.
        """
        self.state = STATE_FAILED
        notify(grok.ObjectModifiedEvent(self))


@attrs_to_fields
class PaymentItem(grok.Model):

    grok.implements(IPaymentItem)