## $Id: interfaces.py 8033 2012-04-03 20:40:17Z 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
##
"""Interfaces of the university application package.
"""
from grokcore.content.interfaces import IContainer
from zc.sourcefactory.basic import BasicSourceFactory
from zc.sourcefactory.contextual import BasicContextualSourceFactory
from zope import schema
from zope.component import getUtilitiesFor, queryUtility, getUtility
from zope.catalog.interfaces import ICatalog
from zope.interface import Interface, Attribute, implements, directlyProvides
from zope.schema.interfaces import (
    ValidationError, ISource, IContextSourceBinder)
from waeup.kofa.schema import TextLineChoice
from waeup.kofa.interfaces import (
    IKofaObject, year_range, validate_email, academic_sessions_vocab,
    SimpleKofaVocabulary)
from waeup.kofa.interfaces import MessageFactory as _
from waeup.kofa.payments.interfaces import IOnlinePayment
from waeup.kofa.schoolgrades import ResultEntryField
from waeup.kofa.students.vocabularies import (
    lgas_vocab, GenderSource)
from waeup.kofa.university.vocabularies import (
    course_levels, AppCatSource, CertificateSource)

#: Maximum upload size for applicant passport photographs (in bytes)
MAX_UPLOAD_SIZE = 1024 * 20

class RegNumInSource(ValidationError):
    """Registration number exists already
    """
    # The docstring of ValidationErrors is used as error description
    # by zope.formlib.
    pass

class RegNumberSource(object):
    implements(ISource)
    cat_name = 'applicants_catalog'
    field_name = 'reg_number'
    validation_error = RegNumInSource
    def __init__(self, context):
        self.context = context
        return

    def __contains__(self, value):
        cat = queryUtility(ICatalog, self.cat_name)
        if cat is None:
            return True
        kw = {self.field_name: (value, value)}
        results = cat.searchResults(**kw)
        for entry in results:
            if entry.applicant_id != self.context.applicant_id:
                # XXX: sources should simply return False.
                #      But then we get some stupid error message in forms
                #      when validation fails.
                raise self.validation_error(value)
                #return False
        return True

def contextual_reg_num_source(context):
    source = RegNumberSource(context)
    return source
directlyProvides(contextual_reg_num_source, IContextSourceBinder)


class AppCatCertificateSource(CertificateSource):
    """An application certificate source delivers all courses which belong to
    a certain application_category.
    """
    def getValues(self, context):
        # appliction category not available when certificate was deleted.
        # shouldn't that info be part of applicant info instead?
        # when we cannot determine the appcat, we will display all courses.
        appcat = getattr(getattr(context, '__parent__', None),
                         'application_category', None)
        catalog = getUtility(ICatalog, name='certificates_catalog')
        result = catalog.searchResults(
            application_category=(appcat,appcat))
        result = sorted(result, key=lambda value: value.code)
        curr_course = context.course1
        if curr_course is not None and curr_course not in result:
            # display also current course even if it is not catalogued
            # (any more)
            result = [curr_course,] + result
        return result

class ApplicationTypeSource(BasicContextualSourceFactory):
    """An application type source delivers screening types defined in the
    portal.
    """
    def getValues(self, context):
        appcats_dict = getUtility(
            IApplicantsUtils).APP_TYPES_DICT
        return sorted(appcats_dict.keys())

    def getToken(self, context, value):
        return value

    def getTitle(self, context, value):
        appcats_dict = getUtility(
            IApplicantsUtils).APP_TYPES_DICT
        return appcats_dict[value][0]

# Maybe Uniben still needs this ...
#class ApplicationPinSource(BasicContextualSourceFactory):
#    """An application pin source delivers PIN prefixes for application
#    defined in the portal.
#    """
#    def getValues(self, context):
#        apppins_dict = getUtility(
#            IApplicantsUtils).APP_TYPES_DICT
#        return sorted(appcats_dict.keys())
#
#    def getToken(self, context, value):
#        return value
#
#    def getTitle(self, context, value):
#        apppins_dict = getUtility(
#            IApplicantsUtils).APP_TYPES_DICT
#        return u"%s (%s)" % (
#            apppins_dict[value][1],self.apppins_dict[value][0])

application_modes_vocab = SimpleKofaVocabulary(
    (_('Create Application Records'), 'create'),
    (_('Update Application Records'), 'update'),
    )

class IApplicantsUtils(Interface):
    """A collection of methods which are subject to customization.
    """

    APP_TYPES_DICT = Attribute(' dict of application types')

class IApplicantsRoot(IKofaObject, IContainer):
    """A container for university applicants containers.
    """
    pass

class IApplicantsContainer(IKofaObject):
    """An applicants container contains university applicants.

    """

    code = schema.TextLine(
        title = _(u'Code'),
        required = True,
        readonly = True,
        )

    title = schema.TextLine(
        title = _(u'Title'),
        required = True,
        readonly = True,
        )

    prefix = schema.Choice(
        title = _(u'Application Target'),
        required = True,
        source = ApplicationTypeSource(),
        readonly = True,
        )

    year = schema.Choice(
        title = _(u'Year of Entrance'),
        required = True,
        values = year_range(),
        readonly = True,
        )

    mode = schema.Choice(
        title = _(u'Application Mode'),
        vocabulary = application_modes_vocab,
        required = True,
        )

    entry_level = schema.Choice(
        title = _(u'Entry Level'),
        vocabulary = course_levels,
        required = True,
        )

    # Maybe Uniben still needs this ...
    #ac_prefix = schema.Choice(
    #    title = u'Activation code prefix',
    #    required = True,
    #    default = None,
    #    source = ApplicationPinSource(),
    #    )

    application_category = schema.Choice(
        title = _(u'Category for the grouping of certificates'),
        required = True,
        source = AppCatSource(),
        )

    description = schema.Text(
        title = _(u'Human readable description in reST format'),
        required = False,
        default = u'''This text can been seen by anonymous users.
Here we put multi-lingual information about the study courses provided, the application procedure and deadlines.
>>de<<
Dieser Text kann von anonymen Benutzern gelesen werden.
Hier koennen mehrsprachige Informationen fuer Antragsteller hinterlegt werden.'''
        )

    description_dict = Attribute(
        """Content as language dictionary with values in HTML format.""")

    startdate = schema.Date(
        title = _(u'Application Start Date'),
        required = False,
        )

    enddate = schema.Date(
        title = _(u'Application Closing Date'),
        required = False,
        )

    strict_deadline = schema.Bool(
        title = _(u'Forbid additions after deadline (enddate)'),
        required = False,
        default = True,
        )

    def archive(id=None):
        """Create on-dist archive of applicants stored in this term.

        If id is `None`, all applicants are archived.

        If id contains a single id string, only the respective
        applicants are archived.

        If id contains a list of id strings all of the respective
        applicants types are saved to disk.
        """

    def clear(id=None, archive=True):
        """Remove applicants of type given by 'id'.

        Optionally archive the applicants.

        If id is `None`, all applicants are archived.

        If id contains a single id string, only the respective
        applicants are archived.

        If id contains a list of id strings all of the respective
        applicant types are saved to disk.

        If `archive` is ``False`` none of the archive-handling is done
        and respective applicants are simply removed from the
        database.
        """

class IApplicantsContainerAdd(IApplicantsContainer):
    """An applicants container contains university applicants.
    """
    prefix = schema.Choice(
        title = _(u'Application Target'),
        required = True,
        source = ApplicationTypeSource(),
        readonly = False,
        )

    year = schema.Choice(
        title = _(u'Year of Entrance'),
        required = True,
        values = year_range(),
        readonly = False,
        )

IApplicantsContainerAdd[
    'prefix'].order =  IApplicantsContainer['prefix'].order
IApplicantsContainerAdd[
    'year'].order =  IApplicantsContainer['year'].order

class IApplicantBaseData(IKofaObject):
    """The data for an applicant.

    This is a base interface with no field
    required. For use with processors, forms, etc., please use one of
    the derived interfaces below, which set more fields to required
    state, depending on use-case.

    This base interface is also implemented by the
    :class:`waeup.kofa.students.StudentApplication` class in the
    students package. Thus, these are the data which are saved after
    admission.
    """
    applicant_id = schema.TextLine(
        title = _(u'Applicant Id'),
        required = False,
        readonly = False,
        )
    reg_number = TextLineChoice(
        title = _(u'Registration Number'),
        readonly = False,
        required = True,
        source = contextual_reg_num_source,
        )
    #access_code = schema.TextLine(
    #    title = u'Activation Code',
    #    required = False,
    #    readonly = True,
    #    )
    firstname = schema.TextLine(
        title = _(u'First Name'),
        required = True,
        )
    middlename = schema.TextLine(
        title = _(u'Middle Name'),
        required = False,
        )
    lastname = schema.TextLine(
        title = _(u'Last Name (Surname)'),
        required = True,
        )
    date_of_birth = schema.Date(
        title = _(u'Date of Birth'),
        required = True,
        )
    lga = schema.Choice(
        source = lgas_vocab,
        title = _(u'State/LGA'),
        default = 'foreigner',
        required = False,
        )
    sex = schema.Choice(
        title = _(u'Sex'),
        source = GenderSource(),
        required = True,
        )
    email = schema.ASCIILine(
        title = _(u'Email Address'),
        required = False,
        constraint=validate_email,
        )
    phone = schema.TextLine(
        title = _(u'Phone'),
        description = u'',
        required = False,
        )
    course1 = schema.Choice(
        title = _(u'1st Choice Course of Study'),
        source = CertificateSource(),
        required = True,
        )
    course2 = schema.Choice(
        title = _(u'2nd Choice Course of Study'),
        source = CertificateSource(),
        required = False,
        )
    school_grades = schema.List(
        title = _(u'School Grades'),
        value_type = ResultEntryField(),
        required = False,
        default = [],
        )

    #
    # Data to be imported after screening
    #
    screening_score = schema.Int(
        title = _(u'Screening Score'),
        required = False,
        )
    screening_venue = schema.TextLine(
        title = _(u'Screening Venue'),
        required = False,
        )
    course_admitted = schema.Choice(
        title = _(u'Admitted Course of Study'),
        source = CertificateSource(),
        required = False,
        )
    notice = schema.Text(
        title = _(u'Notice'),
        required = False,
        )

class IApplicantProcessData(IApplicantBaseData):
    """An applicant.

    Here we add process attributes and methods to the base data.
    """

    history = Attribute('Object history, a list of messages')
    state = Attribute('The application state of an applicant')
    display_fullname = Attribute('The fullname of an applicant')
    application_date = Attribute('Date of submission, used for export only')
    password = Attribute('Encrypted password of a applicant')
    application_number = Attribute('The key under which the record is stored')

    def loggerInfo(ob_class, comment):
        """Adds an INFO message to the log file
        """

    student_id = schema.TextLine(
        title = _(u'Student Id'),
        required = False,
        readonly = False,
        )
    locked = schema.Bool(
        title = _(u'Form locked'),
        default = False,
        )

class IApplicant(IApplicantProcessData):
    """An applicant.

    This is basically the applicant base data. Here we repeat the
    fields from base data if we have to set the `required` attribute
    to True (which is the default).
    """

    def createStudent():
        """Create a student object from applicatnt data
        and copy applicant object.
        """

class IApplicantEdit(IApplicant):
    """An applicant interface for editing.

    Here we can repeat the fields from base data and set the
    `required` and `readonly` attributes to True to further restrict
    the data access. Or we can allow only certain certificates to be
    selected by choosing the appropriate source.

    We cannot omit fields here. This has to be done in the
    respective form page.
    """

    course1 = schema.Choice(
        title = _(u'1st Choice Course of Study'),
        source = AppCatCertificateSource(),
        required = True,
        )
    course2 = schema.Choice(
        title = _(u'2nd Choice Course of Study'),
        source = AppCatCertificateSource(),
        required = False,
        )
    screening_score = schema.Int(
        title = _(u'Screening Score'),
        required = False,
        readonly = True,
        )
    screening_venue = schema.TextLine(
        title = _(u'Screening Venue'),
        required = False,
        readonly = True,
        )
    course_admitted = schema.Choice(
        title = _(u'Admitted Course of Study'),
        source = CertificateSource(),
        required = False,
        readonly = True,
        )
    notice = schema.Text(
        title = _(u'Notice'),
        required = False,
        readonly = True,
        )

class IApplicantUpdateByRegNo(IApplicant):
    """Representation of an applicant.

    Skip regular reg_number validation if reg_number is used for finding
    the applicant object.
    """
    reg_number = schema.TextLine(
        title = u'Registration Number',
        required = False,
        )

class IApplicantOnlinePayment(IOnlinePayment):
    """An applicant payment via payment gateways.

    """
    p_year = schema.Choice(
        title = _(u'Payment Session'),
        source = academic_sessions_vocab,
        required = False,
        )

IApplicantOnlinePayment['p_year'].order = IApplicantOnlinePayment[
    'p_year'].order