## $Id: browser.py 9407 2012-10-24 21:59:21Z henrik $
##
## Copyright (C) 2012 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
##
from datetime import datetime
import httplib
import urllib
from xml.dom.minidom import parseString
import grok
from zope.component import getUtility
from waeup.kofa.browser.layout import KofaPage, UtilityView
from waeup.kofa.accesscodes import create_accesscode
from waeup.kofa.interfaces import RETURNING, IKofaUtils
from waeup.kofa.utils.helpers import to_timezone
from waeup.kofa.students.viewlets import ApprovePaymentActionButton as APABStudent
from waeup.kofa.applicants.viewlets import ApprovePaymentActionButton as APABApplicant
from waeup.uniben.students.interfaces import ICustomStudentOnlinePayment
from waeup.uniben.applicants.interfaces import ICustomApplicantOnlinePayment
from waeup.uniben.interfaces import MessageFactory as _

PRODUCT_ID = '57'
SITE_NAME = 'uniben-kofa.waeup.org'
PROVIDER_ACCT = '1010764827'
PROVIDER_BANK_ID = '117'
PROVIDER_ITEM_NAME = 'BT Education'
INSTITUTION_NAME = 'Uniben'
CURRENCY = '566'
#QUERY_URL = 'https://webpay.interswitchng.com/paydirect/services/TransactionQueryURL.aspx'
#QUERY_URL = 'https://testwebpay.interswitchng.com/test_paydirect/services/TransactionQueryURL.aspx'
POST_ACTION = 'https://webpay.interswitchng.com/paydirect/webpay/pay.aspx'
#POST_ACTION = 'https://testwebpay.interswitchng.com/test_paydirect/webpay/pay.aspx'

HOST = 'webpay.interswitchng.com'
#HOST = 'testwebpay.interswitchng.com'
URL = '/paydirect/services/TransactionQueryWs.asmx'
#URL = '/test_paydirect/services/TransactionQueryWs.asmx'
httplib.HTTPConnection.debuglevel = 0


def SOAP_post(soap_action,xml):
    """Handles making the SOAP request.

    Further reading:
    http://testwebpay.interswitchng.com/test_paydirect/services/TransactionQueryWs.asmx?op=getTransactionData
    """
    h = httplib.HTTPConnection(HOST)
    headers={
        'Host':HOST,
        'Content-Type':'text/xml; charset=utf-8',
        'Content-Length':len(xml),
        'SOAPAction':'"%s"' % soap_action,
    }
    h.request('POST', URL, body=xml,headers=headers)
    r = h.getresponse()
    d = r.read()
    if r.status!=200:
        raise ValueError('Error connecting: %s, %s' % (r.status, r.reason))
    return d

def get_SOAP_response(product_id, transref):
    xml="""\
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <getTransactionData xmlns="http://tempuri.org/">
      <product_id>%s</product_id>
      <trans_ref>%s</trans_ref>
    </getTransactionData>
  </soap:Body>
</soap:Envelope>""" % (product_id, transref)
    result_xml=SOAP_post("http://tempuri.org/getTransactionData",xml)
    doc=parseString(result_xml)
    response=doc.getElementsByTagName('getTransactionDataResult')[0].firstChild.data
    return response

def query_interswitch(payment):
    sr = get_SOAP_response(PRODUCT_ID, payment.p_id)
    wlist = sr.split(':')
    if len(wlist) != 7:
        msg = _('Invalid callback: ${a}', mapping = {'a': sr})
        log = 'invalid callback for payment %s: %s' % (payment.p_id, sr)
        return False, msg, log
    payment.r_code = wlist[0]
    payment.r_desc = wlist[1]
    payment.r_amount_approved = float(wlist[2]) / 100
    payment.r_card_num = wlist[3]
    payment.r_pay_reference = wlist[5]
    payment.r_company = u'interswitch'
    if payment.r_code != '00':
        msg = _('Unsuccessful callback: ${a}', mapping = {'a': sr})
        log = 'unsuccessful callback for payment %s: %s' % (payment.p_id, sr)
        payment.p_state = 'failed'
        return False, msg, log
    if payment.r_amount_approved != payment.amount_auth:
        msg = _('Callback amount does not match.')
        log = 'wrong callback for payment %s: %s' % (payment.p_id, sr)
        payment.p_state = 'failed'
        return False, msg, log
    if wlist[4] != payment.p_id:
        msg = _('Callback transaction id does not match.')
        log = 'wrong callback for payment %s: %s' % (payment.p_id, sr)
        payment.p_state = 'failed'
        return False, msg, log
    payment.p_state = 'paid'
    payment.payment_date = datetime.utcnow()
    msg = _('Successful callback received')
    log = 'valid callback for payment %s: %s' % (payment.p_id, sr)
    return True, msg, log

class InterswitchActionButtonStudent(APABStudent):
    grok.order(1)
    grok.context(ICustomStudentOnlinePayment)
    grok.require('waeup.payStudent')
    icon = 'actionicon_pay.png'
    text = _('CollegePAY')
    target = 'goto_interswitch'

    @property
    def target_url(self):
        if self.context.p_state != 'unpaid':
            return ''
        return self.view.url(self.view.context, self.target)

class InterswitchActionButtonApplicant(APABApplicant):
    grok.order(1)
    grok.context(ICustomApplicantOnlinePayment)
    grok.require('waeup.payApplicant')
    icon = 'actionicon_pay.png'
    text = _('CollegePAY')
    target = 'goto_interswitch'

    @property
    def target_url(self):
        if self.context.p_state != 'unpaid':
            return ''
        return self.view.url(self.view.context, self.target)

# Deprecated
#class InterswitchRequestCallbackActionButtonStudent(RCABStudent):
#    grok.order(3)
#    grok.context(ICustomStudentOnlinePayment)
#    icon = 'actionicon_call.png'
#    text = _('Request CollegePAY callback')

#    def target_url(self):
#        if self.context.p_state == 'paid':
#            return ''
#        site_redirect_url = self.view.url(self.view.context, 'isw_callback')
#        args = {
#            'transRef':self.context.p_id,
#            'prodID':PRODUCT_ID,
#            'redirectURL':site_redirect_url}
#        return QUERY_URL + '?%s' % urllib.urlencode(args)

# Alternative preferred solution
class InterswitchRequestWebserviceActionButtonStudent(APABStudent):
    grok.order(2)
    grok.context(ICustomStudentOnlinePayment)
    grok.require('waeup.payStudent')
    icon = 'actionicon_call.png'
    text = _('Requery CollegePAY')
    target = 'request_webservice'

class InterswitchRequestWebserviceActionButtonApplicant(APABApplicant):
    grok.order(2)
    grok.context(ICustomApplicantOnlinePayment)
    grok.require('waeup.payApplicant')
    icon = 'actionicon_call.png'
    text = _('Requery CollegePAY')
    target = 'request_webservice'


class InterswitchPageStudent(KofaPage):
    """ View which sends a POST request to the Interswitch
    CollegePAY payment gateway.
    """
    grok.context(ICustomStudentOnlinePayment)
    grok.name('goto_interswitch')
    grok.template('student_goto_interswitch')
    grok.require('waeup.payStudent')
    label = _('Submit data to CollegePAY (Interswitch Payment Gateway)')
    submit_button = _('Submit')
    action = POST_ACTION
    site_name = SITE_NAME
    currency = CURRENCY
    product_id = PRODUCT_ID

    def update(self):
        #if self.context.p_state != 'unpaid':
        if self.context.p_state == 'paid':
            self.flash(_("Payment ticket can't be re-send to CollegePAY."))
            self.redirect(self.url(self.context, '@@index'))
            return

        student = self.student = self.context.student
        certificate = getattr(student['studycourse'],'certificate',None)
        self.amount_auth = 100 * self.context.amount_auth
        xmldict = {}
        if certificate is not None:
            xmldict['department'] = certificate.__parent__.__parent__.code
            xmldict['faculty'] = certificate.__parent__.__parent__.__parent__.code
        else:
            xmldict['department'] = None
            xmldict['faculty'] = None
        self.category = getUtility(IKofaUtils).PAYMENT_CATEGORIES[self.context.p_category]
        tz = getUtility(IKofaUtils).tzinfo
        self.local_date_time = to_timezone(
            self.context.creation_date, tz).strftime("%Y-%m-%d %H:%M:%S %Z")
        self.site_redirect_url = self.url(self.context, 'request_webservice')
        # Provider data
        xmldict['detail_ref'] = self.context.p_id
        xmldict['provider_acct'] = PROVIDER_ACCT
        xmldict['provider_bank_id'] = PROVIDER_BANK_ID
        xmldict['provider_item_name'] = PROVIDER_ITEM_NAME
        # Institution data
        xmldict['institution_acct'] = '000000000000'
        xmldict['institution_bank_id'] = '00'
        xmldict['institution_amt'] = '0.0'
        if self.context.p_category == 'schoolfee':
            if student.current_mode.endswith('_ft') \
                and student.state == RETURNING:
                provider_amt = 600
            else:
                provider_amt = 1500
            #studycourse = student['studycourse']
            if student.current_mode.endswith('_ft'):
                self.pay_item_id = '5700'
                #post-grad full-time students of all faculties
                if student.is_postgrad:
                    xmldict['institution_acct'] = '1012842833'
                    xmldict['institution_bank_id'] = '117'
                #all other part-time students depending on faculty
                elif student.faccode in ('SSC','LAW','MED'):
                    xmldict['institution_acct'] = '0005986938'
                    xmldict['institution_bank_id'] = '31'
                elif student.faccode in ('ENG','PSC','PHA'):
                    xmldict['institution_acct'] = '0014413973'
                    xmldict['institution_bank_id'] = '129'
                elif student.faccode in ('LSC','DEN','AGR'):
                    xmldict['institution_acct'] = '1012801319'
                    xmldict['institution_bank_id'] = '117'
                elif student.faccode in ('ART','EDU','MGS','BMS'):
                    xmldict['institution_acct'] = '6220027556'
                    xmldict['institution_bank_id'] = '51'
            elif student.current_mode.endswith('_pt'):
                self.pay_item_id = '5701'
                #post-grad part-time students of all faculties
                if student.is_postgrad:
                    xmldict['institution_acct'] = '0023708207'
                    xmldict['institution_bank_id'] = '72'
                #all other part-time students depending on faculty
                elif student.faccode in ('ENG','LAW','MGS'):
                    xmldict['institution_acct'] = '2019006824'
                    xmldict['institution_bank_id'] = '8'
                elif student.faccode in ('IPA','PHA','SSC','AGR','EDU'):
                    xmldict['institution_acct'] = '0122012109'
                    xmldict['institution_bank_id'] = '16'
        elif self.context.p_category == 'clearance':
            self.pay_item_id = '5702'
            provider_amt = 1500
            xmldict['institution_bank_id'] = '7'
            xmldict['institution_acct'] = '1003475516'

        xmldict['provider_amt'] = 100 * provider_amt
        xmldict['institution_item_name'] = self.category
        xmldict['institution_name'] = INSTITUTION_NAME
        xmldict['institution_amt'] = 100 * (
            self.context.amount_auth - provider_amt - 150)
        # Interswitch amount is not part of the xml data
        xmltext = """<payment_item_detail>
<item_details detail_ref="%(detail_ref)s" college="%(institution_name)s" department="%(department)s" faculty="%(faculty)s">
<item_detail item_id="1" item_name="%(institution_item_name)s" item_amt="%(institution_amt)d" bank_id="%(institution_bank_id)s" acct_num="%(institution_acct)s" />
<item_detail item_id="2" item_name="%(provider_item_name)s" item_amt="%(provider_amt)d" bank_id="%(provider_bank_id)s" acct_num="%(provider_acct)s" />
</item_details>
</payment_item_detail>""" % xmldict
        self.xml_data = """<input type="hidden" name="xml_data" value='%s'  />""" % xmltext
        return

class InterswitchPageApplicant(KofaPage):
    """ View which sends a POST request to the Interswitch
    CollegePAY payment gateway.
    """
    grok.context(ICustomApplicantOnlinePayment)
    grok.require('waeup.payApplicant')
    grok.template('applicant_goto_interswitch')
    grok.name('goto_interswitch')
    label = _('Submit data to CollegePAY (Interswitch Payment Gateway)')
    submit_button = _('Submit')
    action = POST_ACTION
    site_name = SITE_NAME
    currency = CURRENCY
    pay_item_id = '5703'
    product_id = PRODUCT_ID

    def update(self):
        if self.context.p_state != 'unpaid':
            self.flash(_("Payment ticket can't be re-send to CollegePAY."))
            self.redirect(self.url(self.context, '@@index'))
            return
        if self.context.__parent__.__parent__.expired \
            and self.context.__parent__.__parent__.strict_deadline:
            self.flash(_("Payment ticket can't be send to CollegePAY. "
                         "Application period has expired."))
            self.redirect(self.url(self.context, '@@index'))
            return
        self.applicant = self.context.__parent__
        self.amount_auth = 100 * self.context.amount_auth
        xmldict = {}
        self.category = getUtility(IKofaUtils).PAYMENT_CATEGORIES[self.context.p_category]
        tz = getUtility(IKofaUtils).tzinfo
        self.local_date_time = to_timezone(
            self.context.creation_date, tz).strftime("%Y-%m-%d %H:%M:%S %Z")
        self.site_redirect_url = self.url(self.context, 'request_webservice')
        if self.applicant.applicant_id.startswith('pg'):
            provider_amt = 400
            xmldict['institution_acct'] = '0031716030'
            xmldict['institution_bank_id'] = '10'
        else:
            provider_amt = 250
            xmldict['institution_acct'] = '6220032503'
            xmldict['institution_bank_id'] = '51'
        xmldict['detail_ref'] = self.context.p_id
        xmldict['provider_amt'] = 100 * provider_amt
        xmldict['provider_acct'] = PROVIDER_ACCT
        xmldict['provider_bank_id'] = PROVIDER_BANK_ID
        xmldict['provider_item_name'] = PROVIDER_ITEM_NAME
        xmldict['institution_amt'] = 100 * (self.context.amount_auth - provider_amt - 150)
        xmldict['institution_item_name'] = self.context.p_category
        xmldict['institution_name'] = INSTITUTION_NAME
        # Interswitch amount is not part of the xml data
        xmltext = """<payment_item_detail>
<item_details detail_ref="%(detail_ref)s" college="%(institution_name)s">
<item_detail item_id="1" item_name="%(institution_item_name)s" item_amt="%(institution_amt)d" bank_id="%(institution_bank_id)s" acct_num="%(institution_acct)s" />
<item_detail item_id="2" item_name="%(provider_item_name)s" item_amt="%(provider_amt)d" bank_id="%(provider_bank_id)s" acct_num="%(provider_acct)s" />
</item_details>
</payment_item_detail>""" % xmldict
        self.xml_data = """<input type="hidden" name="xml_data" value='%s'  />""" % xmltext
        return

# Deprecated
#class InterswitchPaymentCallbackPageStudent(UtilityView, grok.View):
#    """ Callback view for the CollegePAY gateway
#    """
#    grok.context(ICustomStudentOnlinePayment)
#    grok.name('isw_callback')
#    grok.require('waeup.payStudent')

    # This view is not yet working for offline querying transactions
    # since the query string differs from the query string sent after
    # posting transactions. This Interswitch bug must be removed first.
    # Alternatively, we could use the webservice only and replace
    # the RequestCallbackActionButton by a RequestWebserviceActionButton

#    def update(self):
#        if self.context.p_state == 'paid':
#            self.flash(_('This ticket has already been paid.'))
#            return
#        student = self.context.student
#        query = self.request.form
#        write_log_message(self,'callback received: %s' % query)
#        self.context.r_card_num = query.get('cardNum', None)
#        self.context.r_code = query.get('resp', None)
#        self.context.r_pay_reference  = query.get('payRef', None)
#        self.context.r_amount_approved = float(query.get('apprAmt', '0.0')) / 100
#        self.context.r_desc = query.get('desc', None)
#        if self.context.r_code != '00':
#            self.flash(_('Unsuccessful callback: ${a}',
#                mapping = {'a': query.get('desc', _('Incomplete query string.'))}))
#            write_log_message(self,'unsuccessful callback: %s' % self.context.p_id)
#            self.context.p_state = 'failed'
#            return
#        if self.context.r_amount_approved != payment.amount_auth:
#            self.flash(_('Wrong amount'))
#            write_log_message(
#                self,'successful but wrong amount: %s' % self.context.p_id)
#            self.context.p_state = 'failed'
#            return
#        try:
#            validation_list = get_SOAP_response(
#                PRODUCT_ID, self.context.p_id).split(':')
            # Validation does not make sense yet since the query string
            # formats are conflicting. We are only printing the validation
            # string, nothing else.
#            print 'WARNING: Webservice validation is not yet implemented'
#            print 'validation list: %s' % validation_list
#        except:
#            print 'Connection to webservice failed.'
        # Add webservice validation here
#        write_log_message(self,'valid callback: %s' % self.context.p_id)
#        self.context.p_state = 'paid'
#        self.context.payment_date = datetime.utcnow()
#        actions_after_student_payment(student, self.context, self)
#        return

#    def render(self):
#        self.redirect(self.url(self.context, '@@index'))
#        return

# Alternative solution, replaces InterswitchPaymentCallbackPage
class InterswitchPaymentRequestWebservicePageStudent(UtilityView, grok.View):
    """ Request webservice view for the CollegePAY gateway
    """
    grok.context(ICustomStudentOnlinePayment)
    grok.name('request_webservice')
    grok.require('waeup.payStudent')

    def update(self):
        ob_class = self.__implemented__.__name__
        if self.context.p_state == 'paid':
            self.flash(_('This ticket has already been paid.'))
            return
        student = self.context.student
        success, msg, log = query_interswitch(self.context)
        student.writeLogMessage(self, log)
        if not success:
            self.flash(msg)
            return
        success, msg, log = self.context.doAfterStudentPayment()
        if log is not None:
            student.writeLogMessage(self, log)
        self.flash(msg)
        return

    def render(self):
        self.redirect(self.url(self.context, '@@index'))
        return

class InterswitchPaymentRequestWebservicePageApplicant(UtilityView, grok.View):
    """ Request webservice view for the CollegePAY gateway
    """
    grok.context(ICustomApplicantOnlinePayment)
    grok.name('request_webservice')
    grok.require('waeup.payApplicant')

    def update(self):
        if self.context.p_state == 'paid':
            self.flash(_('This ticket has already been paid.'))
            return
        applicant = self.context.__parent__
        success, msg, log = query_interswitch(self.context)
        applicant.writeLogMessage(self, log)
        if not success:
            self.flash(msg)
            return
        success, msg, log = self.context.doAfterApplicantPayment()
        if log is not None:
            applicant.writeLogMessage(self, log)
        self.flash(msg)
        return

    def render(self):
        self.redirect(self.url(self.context, '@@index'))
        return