## $Id: browser.py 15884 2019-12-12 06:17:45Z henrik $
##
## 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
##
"""UI components for basic applicants and related components.
"""
import grok
import os
from zope.component import getUtility
from zope.formlib.textwidgets import BytesDisplayWidget
from waeup.kofa.interfaces import (
    IExtFileStore, IFileStoreNameChooser)
from waeup.kofa.utils.helpers import string_from_bytes, file_size, now
from waeup.kofa.applicants.browser import (
    ApplicantRegistrationPage, ApplicantsContainerPage)
from waeup.kofa.applicants.interfaces import (
    ISpecialApplicant, IApplicantsContainer)
from kofacustom.nigeria.applicants.browser import (
    NigeriaApplicantDisplayFormPage,
    NigeriaApplicantManageFormPage,
    NigeriaApplicantEditFormPage,
    NigeriaPDFApplicationSlip)
from waeup.kofa.widgets.datewidget import (
    FriendlyDateDisplayWidget,
    FriendlyDatetimeDisplayWidget)
from kofacustom.nigeria.applicants.interfaces import (
    OMIT_DISPLAY_FIELDS,
    #UG_OMIT_DISPLAY_FIELDS,
    #UG_OMIT_PDF_FIELDS,
    #UG_OMIT_MANAGE_FIELDS,
    #UG_OMIT_EDIT_FIELDS,
    PG_OMIT_DISPLAY_FIELDS,
    PG_OMIT_PDF_FIELDS,
    PG_OMIT_MANAGE_FIELDS,
    PG_OMIT_EDIT_FIELDS,
    )
from kofacustom.iuokada.applicants.interfaces import (
    ICustomPGApplicant, ICustomUGApplicant, ICustomApplicant,
    ICustomPGApplicantEdit, ICustomUGApplicantEdit,
    ICustomApplicantOnlinePayment
    )
from kofacustom.iuokada.interfaces import MessageFactory as _

MAX_FILE_UPLOAD_SIZE = 1024 * 500

# UG students are all undergraduate students.
UG_OMIT_DISPLAY_FIELDS = OMIT_DISPLAY_FIELDS + (
    #'jamb_subjects_list',
    'programme_type',)
UG_OMIT_PDF_FIELDS = UG_OMIT_DISPLAY_FIELDS + ('phone',)
UG_OMIT_MANAGE_FIELDS = (
    'special_application',
    #'jamb_subjects_list',
    'programme_type')
UG_OMIT_EDIT_FIELDS = UG_OMIT_MANAGE_FIELDS + OMIT_DISPLAY_FIELDS + (
    'student_id',
    'notice',
    'screening_score',
    'screening_venue',
    'screening_date',
    #'jamb_age',
    #'jamb_subjects',
    #'jamb_score',
    #'jamb_reg_number',
    'aggregate')

def handle_file_upload(upload, context, view, attr=None):
    """Handle upload of applicant files.

    Returns `True` in case of success or `False`.

    Please note that file pointer passed in (`upload`) most probably
    points to end of file when leaving this function.
    """
    size = file_size(upload)
    if size > MAX_FILE_UPLOAD_SIZE:
        view.flash(_('Uploaded file is too big!'))
        return False
    dummy, ext = os.path.splitext(upload.filename)
    ext.lower()
    if ext != '.pdf':
        view.flash(_('pdf file extension expected.'))
        return False
    upload.seek(0) # file pointer moved when determining size
    store = getUtility(IExtFileStore)
    file_id = IFileStoreNameChooser(context).chooseName(attr=attr)
    store.createFile(file_id, upload)
    return True

class CustomApplicantsContainerPage(ApplicantsContainerPage):
    """The standard view for regular applicant containers.
    """

    @property
    def form_fields(self):
        form_fields = grok.AutoFields(IApplicantsContainer).omit(
            'title', 'description')
        if self.request.principal.id == 'zope.anybody':
            form_fields = form_fields.omit(
                'code', 'prefix', 'year', 'mode', 'hidden',
                'strict_deadline', 'application_category',
                'application_slip_notice',
                'application_fee', 'with_picture',
                'startdate', 'enddate')
        return form_fields

class CustomApplicantDisplayFormPage(NigeriaApplicantDisplayFormPage):
    """A display view for applicant data.
    """

    @property
    def file_links(self):
        html = ''
        pdf = getUtility(IExtFileStore).getFileByContext(
            self.context, attr='stateresult.pdf')
        if pdf:
            html += '<a href="%s">Statement of Result</a>' % self.url(
                self.context, 'stateresult.pdf')
        return html

    @property
    def form_fields(self):
        if self.target is not None and self.target.startswith('pg'):
            form_fields = grok.AutoFields(ICustomPGApplicant)
            for field in PG_OMIT_DISPLAY_FIELDS:
                form_fields = form_fields.omit(field)
        else:
            form_fields = grok.AutoFields(ICustomUGApplicant)
            for field in UG_OMIT_DISPLAY_FIELDS:
                form_fields = form_fields.omit(field)
        #form_fields['perm_address'].custom_widget = BytesDisplayWidget
        form_fields['notice'].custom_widget = BytesDisplayWidget
        if not getattr(self.context, 'student_id'):
            form_fields = form_fields.omit('student_id')
        if not getattr(self.context, 'screening_score'):
            form_fields = form_fields.omit('screening_score')
        if not getattr(self.context, 'screening_venue') or self._not_paid():
            form_fields = form_fields.omit('screening_venue')
        if not getattr(self.context, 'screening_date') or self._not_paid():
            form_fields = form_fields.omit('screening_date')
        return form_fields

class CustomApplicantManageFormPage(NigeriaApplicantManageFormPage):
    """A full edit view for applicant data.
    """

    @property
    def form_fields(self):
        if self.target is not None and self.target.startswith('pg'):
            form_fields = grok.AutoFields(ICustomPGApplicant)
            for field in PG_OMIT_MANAGE_FIELDS:
                form_fields = form_fields.omit(field)
        else:
            form_fields = grok.AutoFields(ICustomUGApplicant)
            for field in UG_OMIT_MANAGE_FIELDS:
                form_fields = form_fields.omit(field)
        form_fields['student_id'].for_display = True
        form_fields['applicant_id'].for_display = True
        return form_fields

    def update(self):
        super(CustomApplicantManageFormPage, self).update()
        upload_stateresult = self.request.form.get('form.stateresult', None)
        if upload_stateresult:
            # We got a fresh stateresult upload
            success = handle_file_upload(
                upload_stateresult, self.context, self, attr='stateresult.pdf')
            if success:
                self.context.writeLogMessage(self, 'saved: stateresult')
            else:
                self.upload_success = False
        self.max_file_upload_size = string_from_bytes(MAX_FILE_UPLOAD_SIZE)
        return

class CustomApplicantEditFormPage(NigeriaApplicantEditFormPage):
    """An applicant-centered edit view for applicant data.
    """

    def dataNotComplete(self, data):
        store = getUtility(IExtFileStore)
        if self.context.__parent__.with_picture:
            store = getUtility(IExtFileStore)
            if not store.getFileByContext(self.context, attr=u'passport.jpg'):
                return _('No passport picture uploaded.')
            if not self.request.form.get('confirm_passport', False):
                return _('Passport picture confirmation box not ticked.')
        if self.context.subtype == 'transfer' and \
            not store.getFileByContext(self.context, attr=u'stateresult.pdf'):
            return _('No statement of result pdf file uploaded.')
        return False

    @property
    def form_fields(self):
        if self.target is not None and self.target.startswith('pg'):
            form_fields = grok.AutoFields(ICustomPGApplicantEdit)
            for field in PG_OMIT_EDIT_FIELDS:
                form_fields = form_fields.omit(field)
        else:
            form_fields = grok.AutoFields(ICustomUGApplicantEdit)
            for field in UG_OMIT_EDIT_FIELDS:
                form_fields = form_fields.omit(field)
        form_fields['applicant_id'].for_display = True
        form_fields['reg_number'].for_display = True
        return form_fields

    def update(self):
        if self.context.locked or (
            self.context.__parent__.expired and
            self.context.__parent__.strict_deadline):
            self.emit_lock_message()
            return
        super(CustomApplicantEditFormPage, self).update()
        upload_stateresult = self.request.form.get('form.stateresult', None)
        if upload_stateresult:
            # We got a fresh stateresult upload
            success = handle_file_upload(
                upload_stateresult, self.context, self, attr='stateresult.pdf')
            if not success:
                self.upload_success = False
        self.max_file_upload_size = string_from_bytes(MAX_FILE_UPLOAD_SIZE)
        return

class CustomPDFApplicationSlip(NigeriaPDFApplicationSlip):

    @property
    def form_fields(self):
        if self.target is not None and self.target.startswith('pg'):
            form_fields = grok.AutoFields(ICustomPGApplicant)
            for field in PG_OMIT_PDF_FIELDS:
                form_fields = form_fields.omit(field)
        else:
            form_fields = grok.AutoFields(ICustomUGApplicant)
            for field in UG_OMIT_PDF_FIELDS:
                form_fields = form_fields.omit(field)
        if not getattr(self.context, 'student_id'):
            form_fields = form_fields.omit('student_id')
        if not getattr(self.context, 'screening_score'):
            form_fields = form_fields.omit('screening_score')
        if not getattr(self.context, 'screening_venue'):
            form_fields = form_fields.omit('screening_venue')
        if not getattr(self.context, 'screening_date'):
            form_fields = form_fields.omit('screening_date')
        return form_fields

class StateResult(grok.View):
    """Renders the pdf form extension for applicants.
    """
    grok.name('stateresult.pdf')
    grok.context(ICustomApplicant)
    grok.require('waeup.viewApplication')

    def render(self):
        pdf = getUtility(IExtFileStore).getFileByContext(
            self.context, attr='stateresult.pdf')
        self.response.setHeader('Content-Type', 'application/pdf')
        return pdf