## 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 students and related components.
"""
import grok

from hurry.workflow.interfaces import IWorkflowInfo, IWorkflowState
from zope.component import createObject
from waeup.sirp.accesscodes import invalidate_accesscode, get_access_code
from waeup.sirp.accesscodes.workflow import USED
from waeup.sirp.browser import (
    WAeUPPage, WAeUPEditFormPage, WAeUPAddFormPage, WAeUPDisplayFormPage)
from waeup.sirp.browser.breadcrumbs import Breadcrumb
from waeup.sirp.browser.resources import datepicker, datatable, tabs
from waeup.sirp.browser.viewlets import (
    ManageActionButton, PrimaryNavTab, AddActionButton)
from waeup.sirp.interfaces import IWAeUPObject, IUserAccount
from waeup.sirp.widgets.datewidget import (
    FriendlyDateWidget, FriendlyDateDisplayWidget)
from waeup.sirp.students.interfaces import (
    IStudentsContainer, IStudent, IStudentClearance, IStudentPasswordSetting,
    IStudentPersonal, IStudentBase, IStudentStudyCourse, IStudentPayments,
    IStudentAccommodation, IStudentClearanceEdit, IStudentStudyLevel,
    ICourseTicket, ICourseTicketAdd,
    )
from waeup.sirp.students.catalog import search
from waeup.sirp.students.workflow import CLEARANCE
from waeup.sirp.students.studylevel import StudentStudyLevel, CourseTicket
from waeup.sirp.students.vocabularies import StudyLevelSource
from waeup.sirp.browser.resources import toggleall

# Save function used for save methods in manager pages
def msave(view, **data):
    form = view.request.form
    ob_class = view.__implemented__.__name__.replace('waeup.sirp.','')
    changed_fields = view.applyData(view.context, **data)
    # Turn list of lists into single list
    if changed_fields:
        changed_fields = reduce(lambda x,y: x+y, changed_fields.values())
    fields_string = ' + '.join(changed_fields)
    view.context._p_changed = True
    view.flash('Form has been saved.')
    if fields_string:
        view.context.getStudent().loggerInfo(ob_class, 'saved: % s' % fields_string)
    return

class StudentsTab(PrimaryNavTab):
    """Students tab in primary navigation.
    """

    grok.context(IWAeUPObject)
    grok.order(3)
    grok.require('waeup.viewStudent')
    grok.template('primarynavtab')

    pnav = 4
    tab_title = u'Students'

    @property
    def link_target(self):
        return self.view.application_url('students')

class StudentsBreadcrumb(Breadcrumb):
    """A breadcrumb for the students container.
    """
    grok.context(IStudentsContainer)
    title = u'Students'

class StudentBreadcrumb(Breadcrumb):
    """A breadcrumb for the student container.
    """
    grok.context(IStudent)

    def title(self):
        return self.context.fullname

class SudyCourseBreadcrumb(Breadcrumb):
    """A breadcrumb for the student study course.
    """
    grok.context(IStudentStudyCourse)
    title = u'Study Course'

class PaymentsBreadcrumb(Breadcrumb):
    """A breadcrumb for the student payments folder.
    """
    grok.context(IStudentPayments)
    title = u'Payments'

class AccommodationBreadcrumb(Breadcrumb):
    """A breadcrumb for the student accommodation folder.
    """
    grok.context(IStudentAccommodation)
    title = u'Accommodation'

class StudyLevelBreadcrumb(Breadcrumb):
    """A breadcrumb for course lists.
    """
    grok.context(IStudentStudyLevel)

    @property
    def title(self):
        return self.context.level_title

class StudentsContainerPage(WAeUPPage):
    """The standard view for student containers.
    """
    grok.context(IStudentsContainer)
    grok.name('index')
    grok.require('waeup.viewStudent')
    grok.template('containerpage')
    label = 'Student Section'
    title = 'Students'
    pnav = 4

    def update(self, *args, **kw):
        datatable.need()
        form = self.request.form
        self.hitlist = []
        if 'searchterm' in form and form['searchterm']:
            self.searchterm = form['searchterm']
            self.searchtype = form['searchtype']
        elif 'old_searchterm' in form:
            self.searchterm = form['old_searchterm']
            self.searchtype = form['old_searchtype']
        else:
            if 'search' in form:
                self.flash('Empty search string.')
            return
        self.hitlist = search(query=self.searchterm,
            searchtype=self.searchtype, view=self)
        if not self.hitlist:
            self.flash('No student found.')
        return

class SetPasswordPage(WAeUPPage):
    grok.context(IWAeUPObject)
    grok.name('setpassword')
    grok.require('waeup.Public')
    grok.template('setpassword')
    title = ''
    label = 'Set password for first-time login'
    ac_prefix = 'PWD'
    pnav = 0

    def update(self, SUBMIT=None):
        self.reg_number = self.request.form.get('reg_number', None)
        self.ac_series = self.request.form.get('ac_series', None)
        self.ac_number = self.request.form.get('ac_number', None)

        if SUBMIT is None:
            return
        hitlist = search(query=self.reg_number,
            searchtype='reg_number', view=self)
        if not hitlist:
            self.flash('No student found.')
            return
        if len(hitlist) != 1:   # Cannot happen but anyway
            self.flash('More than one student found.')
            return
        student = hitlist[0].context
        self.student_id = student.student_id
        student_pw = student.password
        pin = '%s-%s-%s' % (self.ac_prefix, self.ac_series, self.ac_number)
        code = get_access_code(pin)
        if not code:
            self.flash('Access code is invalid.')
            return
        if student_pw and pin == student.adm_code:
            self.flash('Password has already been set. Your Student Id is %s'
                % self.student_id)
            return
        elif student_pw:
            self.flash('Password has already been set. You are using the wrong Access Code.')
            return
        # Mark pin as used (this also fires a pin related transition)
        # and set student password
        if code.state == USED:
            self.flash('Access code has already been used.')
            return
        else:
            comment = u"AC invalidated for %s" % self.student_id
            # Here we know that the ac is in state initialized so we do not
            # expect an exception
            #import pdb; pdb.set_trace()
            invalidate_accesscode(pin,comment)
            IUserAccount(student).setPassword(self.ac_number)
            student.adm_code = pin
        self.flash('Password has been set. Your Student Id is %s'
            % self.student_id)
        return

class StudentsContainerManageActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudentsContainer)
    grok.view(StudentsContainerPage)
    grok.require('waeup.manageStudents')
    text = 'Manage student section'


class StudentsContainerManagePage(WAeUPPage):
    """The manage page for student containers.
    """
    grok.context(IStudentsContainer)
    grok.name('manage')
    grok.require('waeup.manageStudents')
    grok.template('containermanagepage')
    pnav = 4
    title = 'Manage student section'

    @property
    def label(self):
        return self.title

    def update(self, *args, **kw):
        datatable.need()
        toggleall.need()
        form = self.request.form
        self.hitlist = []
        if 'searchterm' in form and form['searchterm']:
            self.searchterm = form['searchterm']
            self.searchtype = form['searchtype']
        elif 'old_searchterm' in form:
            self.searchterm = form['old_searchterm']
            self.searchtype = form['old_searchtype']
        else:
            if 'search' in form:
                self.flash('Empty search string.')
            return
        if not 'entries' in form:
            self.hitlist = search(query=self.searchterm,
                searchtype=self.searchtype, view=self)
            if not self.hitlist:
                self.flash('No student found.')
            return
        entries = form['entries']
        if isinstance(entries, basestring):
            entries = [entries]
        deleted = []
        for entry in entries:
            if 'remove' in form:
                del self.context[entry]
                deleted.append(entry)
        self.hitlist = search(query=self.searchterm,
            searchtype=self.searchtype, view=self)
        if len(deleted):
            self.flash('Successfully removed: %s' % ', '.join(deleted))
        return

class StudentsContainerAddActionButton(AddActionButton):
    grok.order(1)
    grok.context(IStudentsContainer)
    grok.view(StudentsContainerManagePage)
    grok.require('waeup.manageStudents')
    text = 'Add student'
    target = 'addstudent'

class StudentAddFormPage(WAeUPAddFormPage):
    """Add-form to add a student.
    """
    grok.context(IStudentsContainer)
    grok.require('waeup.manageStudents')
    grok.name('addstudent')
    grok.template('studentaddpage')
    form_fields = grok.AutoFields(IStudent)
    title = 'Students'
    label = 'Add student'
    pnav = 4

    @grok.action('Create student record')
    def addStudent(self, **data):
        student = createObject(u'waeup.Student')
        self.applyData(student, **data)
        self.context.addStudent(student)
        self.flash('Student record created.')
        self.redirect(self.url(self.context[student.student_id], 'index'))
        return

class StudentBaseDisplayFormPage(WAeUPDisplayFormPage):
    """ Page to display student base data
    """
    grok.context(IStudent)
    grok.name('index')
    grok.require('waeup.viewStudent')
    grok.template('basepage')
    form_fields = grok.AutoFields(IStudentBase).omit('password')
    pnav = 4
    title = 'Base Data'

    @property
    def label(self):
        return '%s: Base Data' % self.context.fullname

    @property
    def hasPassword(self):
        if self.context.password:
            return 'set'
        return 'unset'

class StudentBaseManageActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudent)
    grok.view(StudentBaseDisplayFormPage)
    grok.require('waeup.manageStudents')
    text = 'Manage'
    target = 'edit_base'

class StudentBaseManageFormPage(WAeUPEditFormPage):
    """ View to edit student base data
    """
    grok.context(IStudent)
    grok.name('edit_base')
    grok.require('waeup.manageStudents')
    form_fields = grok.AutoFields(IStudentBase).omit('student_id')
    grok.template('basemanagepage')
    label = 'Manage base data'
    title = 'Base Data'
    pnav = 4

    def update(self):
        datepicker.need() # Enable jQuery datepicker in date fields.
        super(StudentBaseManageFormPage, self).update()
        self.wf_info = IWorkflowInfo(self.context)
        return

    def getTransitions(self):
        """Return a list of dicts of allowed transition ids and titles.

        Each list entry provides keys ``name`` and ``title`` for
        internal name and (human readable) title of a single
        transition.
        """
        allowed_transitions = self.wf_info.getManualTransitions()
        return [dict(name='', title='No transition')] +[
            dict(name=x, title=y) for x, y in allowed_transitions]

    @grok.action('Save')
    def save(self, **data):
        form = self.request.form
        ob_class = self.__implemented__.__name__.replace('waeup.sirp.','')
        password = form.get('password', None)
        password_ctl = form.get('control_password', None)
        if password:
            if (password != password_ctl):
                self.flash('Passwords do not match.')
            else:
                # XXX: This is too early. PW should only be saved if there
                #      are no (other) errors left in form.
                IUserAccount(self.context).setPassword(password)
                self.context.loggerInfo(ob_class, 'password changed')

        #self.reg_number = form.get('form.reg_number', None)
        #if self.reg_number:
        #    hitlist = search(query=self.reg_number,searchtype='reg_number', view=self)
        #    if hitlist and hitlist[0].student_id != self.context.student_id:
        #        self.flash('Registration number exists.')
        #        return
        #self.matric_number = form.get('form.matric_number', None)
        #if self.matric_number:
        #    hitlist = search(query=self.matric_number,
        #        searchtype='matric_number', view=self)
        #    if hitlist and hitlist[0].student_id != self.context.student_id:
        #        self.flash('Matriculation number exists.')
        #        return

        # Turn list of lists into single list
        changed_fields = self.applyData(self.context, **data)
        if changed_fields:
            changed_fields = reduce(lambda x,y: x+y, changed_fields.values())
        fields_string = ' + '.join(changed_fields)
        self.context._p_changed = True
        if form.has_key('transition') and form['transition']:
            transition_id = form['transition']
            self.wf_info.fireTransition(transition_id)
        self.flash('Form has been saved.')
        if fields_string:
            self.context.loggerInfo(ob_class, 'saved: % s' % fields_string)
        return

class StudentClearanceDisplayFormPage(WAeUPDisplayFormPage):
    """ Page to display student clearance data
    """
    grok.context(IStudent)
    grok.name('view_clearance')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentClearance).omit('clearance_locked')
    form_fields['date_of_birth'].custom_widget = FriendlyDateDisplayWidget('le')
    title = 'Clearance Data'
    pnav = 4

    @property
    def label(self):
        return '%s: Clearance Data' % self.context.fullname

class StudentClearanceManageActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudent)
    grok.view(StudentClearanceDisplayFormPage)
    grok.require('waeup.manageStudents')
    text = 'Manage'
    target = 'edit_clearance'

class StudentClearanceManageFormPage(WAeUPEditFormPage):
    """ Page to edit student clearance data
    """
    grok.context(IStudent)
    grok.name('edit_clearance')
    grok.require('waeup.manageStudents')
    form_fields = grok.AutoFields(IStudentClearance)
    label = 'Manage clearance data'
    title = 'Clearance Data'
    pnav = 4

    form_fields['date_of_birth'].custom_widget = FriendlyDateWidget('le-year')

    def update(self):
        datepicker.need() # Enable jQuery datepicker in date fields.
        return super(StudentClearanceManageFormPage, self).update()

    @grok.action('Save')
    def save(self, **data):
        msave(self, **data)
        return

class StudentPersonalDisplayFormPage(WAeUPDisplayFormPage):
    """ Page to display student personal data
    """
    grok.context(IStudent)
    grok.name('view_personal')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentPersonal)
    title = 'Personal Data'
    pnav = 4

    @property
    def label(self):
        return '%s: Personal Data' % self.context.fullname

class StudentPersonalManageActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudent)
    grok.view(StudentPersonalDisplayFormPage)
    grok.require('waeup.manageStudents')
    text = 'Manage'
    target = 'edit_personal'

class StudentPersonalManageFormPage(WAeUPEditFormPage):
    """ Page to edit student clearance data
    """
    grok.context(IStudent)
    grok.name('edit_personal')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentPersonal)
    label = 'Manage personal data'
    title = 'Personal Data'
    pnav = 4

    @grok.action('Save')
    def save(self, **data):
        msave(self, **data)
        return

class StudyCourseDisplayFormPage(WAeUPDisplayFormPage):
    """ Page to display the student study course data
    """
    grok.context(IStudentStudyCourse)
    grok.name('index')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentStudyCourse)
    grok.template('studycoursepage')
    title = 'Study Course'
    pnav = 4

    @property
    def label(self):
        return '%s: Study Course' % self.context.__parent__.fullname

class StudyCourseManageActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudentStudyCourse)
    grok.view(StudyCourseDisplayFormPage)
    grok.require('waeup.manageStudents')
    text = 'Manage'
    target = 'manage'

class StudyCourseManageFormPage(WAeUPEditFormPage):
    """ Page to edit the student study course data
    """
    grok.context(IStudentStudyCourse)
    grok.name('manage')
    grok.require('waeup.manageStudents')
    grok.template('studycoursemanagepage')
    form_fields = grok.AutoFields(IStudentStudyCourse)
    title = 'Study Course'
    label = 'Manage study course'
    pnav = 4
    taboneactions = ['Save','Cancel']
    tabtwoactions = ['Remove selected levels','Cancel']
    tabthreeactions = ['Add study level']

    def update(self):
        super(StudyCourseManageFormPage, self).update()
        tabs.need()
        datatable.need()
        return 

    @grok.action('Save')
    def save(self, **data):
        msave(self, **data)
        return

    @property
    def level_dict(self):
        studylevelsource = StudyLevelSource().factory
        for code in studylevelsource.getValues(self.context):
            title = studylevelsource.getTitle(self.context, code)
            yield(dict(code=code, title=title))

    @grok.action('Add study level')
    def addStudyLevel(self, **data):
        level_code = self.request.form.get('addlevel', None)
        studylevel = StudentStudyLevel()
        studylevel.level = int(level_code)
        try:
            self.context.addStudentStudyLevel(
                self.context.certificate,studylevel)
        except KeyError:
            self.flash('This level exists.')
        self.redirect(self.url(self.context, u'@@manage')+'#tab-2')
        return

    @grok.action('Remove selected levels')
    def delStudyLevels(self, **data):
        form = self.request.form
        if form.has_key('val_id'):
            child_id = form['val_id']
        else:
            self.flash('No study level selected.')
            self.redirect(self.url(self.context, '@@manage')+'#tab-2')
            return
        if not isinstance(child_id, list):
            child_id = [child_id]
        deleted = []
        for id in child_id:
            try:
                del self.context[id]
                deleted.append(id)
            except:
                self.flash('Could not delete %s: %s: %s' % (
                        id, sys.exc_info()[0], sys.exc_info()[1]))
        if len(deleted):
            self.flash('Successfully removed: %s' % ', '.join(deleted))
        self.redirect(self.url(self.context, u'@@manage')+'#tab-2')
        return

class StudyLevelDisplayFormPage(WAeUPDisplayFormPage):
    """ Page to display student study levels
    """
    grok.context(IStudentStudyLevel)
    grok.name('index')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentStudyLevel)
    grok.template('studylevelpage')
    pnav = 4

    @property
    def title(self):
        return 'Study Level %s' % self.context.level_title

    @property
    def label(self):
        return '%s: Study Level %s' % (
            self.context.getStudent().fullname,self.context.level_title)

    @property
    def total_credits(self):
        total_credits = 0
        for key, val in self.context.items():
            total_credits += val.credits
        return total_credits

class StudyLevelManageActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudentStudyLevel)
    grok.view(StudyLevelDisplayFormPage)
    grok.require('waeup.manageStudents')
    text = 'Manage'
    target = 'manage'

class StudyLevelManageFormPage(WAeUPEditFormPage):
    """ Page to edit the student study level data
    """
    grok.context(IStudentStudyLevel)
    grok.name('manage')
    grok.require('waeup.manageStudents')
    grok.template('studylevelmanagepage')
    form_fields = grok.AutoFields(IStudentStudyLevel)
    pnav = 4
    taboneactions = ['Save','Cancel']
    tabtwoactions = ['Add course ticket','Remove selected tickets','Cancel']

    def update(self):
        super(StudyLevelManageFormPage, self).update()
        tabs.need()
        datatable.need()
        return

    @property
    def title(self):
        return 'Study Level %s' % self.context.level_title

    @property
    def label(self):
        return 'Manage study level %s' % self.context.level_title

    @grok.action('Save')
    def save(self, **data):
        msave(self, **data)
        return

    @grok.action('Add course ticket')
    def addCourseTicket(self, **data):
        self.redirect(self.url(self.context, '@@add'))

    @grok.action('Remove selected tickets')
    def delCourseTicket(self, **data):
        form = self.request.form
        if form.has_key('val_id'):
            child_id = form['val_id']
        else:
            self.flash('No ticket selected.')
            self.redirect(self.url(self.context, '@@manage')+'#tab-2')
            return
        if not isinstance(child_id, list):
            child_id = [child_id]
        deleted = []
        for id in child_id:
            try:
                del self.context[id]
                deleted.append(id)
            except:
                self.flash('Could not delete %s: %s: %s' % (
                        id, sys.exc_info()[0], sys.exc_info()[1]))
        if len(deleted):
            self.flash('Successfully removed: %s' % ', '.join(deleted))
        self.redirect(self.url(self.context, u'@@manage')+'#tab-2')
        return

class CourseTicketAddFormPage(WAeUPAddFormPage):
    """Add a course ticket.
    """
    grok.context(IStudentStudyLevel)
    grok.name('add')
    grok.require('waeup.manageStudents')
    label = 'Add course ticket'
    form_fields = grok.AutoFields(ICourseTicketAdd).omit(
        'grade', 'score', 'automatic')
    pnav = 4

    @property
    def title(self):
        return 'Study Level %s' % self.context.level_title

    @grok.action('Add course ticket')
    def addCourseTicket(self, **data):
        ticket = CourseTicket()
        course = data['course']
        ticket.core_or_elective = data['core_or_elective']
        ticket.automatic = False
        ticket.code = course.code
        ticket.title = course.title
        ticket.faculty = course.__parent__.__parent__.__parent__.title
        ticket.department = course.__parent__.__parent__.title
        ticket.credits = course.credits
        ticket.passmark = course.passmark
        ticket.semester = course.semester
        try:
            self.context.addCourseTicket(ticket)
        except KeyError:
            self.flash('The ticket exists.')
            return
        self.flash('Successfully added %s.' % ticket.code)
        self.redirect(self.url(self.context, u'@@manage')+'#tab-2')
        return

    @grok.action('Cancel')
    def cancel(self, **data):
        self.redirect(self.url(self.context))

class CourseTicketDisplayFormPage(WAeUPDisplayFormPage):
    """ Page to display course tickets
    """
    grok.context(ICourseTicket)
    grok.name('index')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(ICourseTicket)
    grok.template('courseticketpage')
    pnav = 4

    @property
    def title(self):
        return 'Course Ticket %s' % self.context.code

    @property
    def label(self):
        return '%s: Course Ticket %s' % (
            self.context.getStudent().fullname,self.context.code)

class CourseTicketManageActionButton(ManageActionButton):
    grok.order(1)
    grok.context(ICourseTicket)
    grok.view(CourseTicketDisplayFormPage)
    grok.require('waeup.manageStudents')
    text = 'Manage'
    target = 'manage'

class CourseTicketManageFormPage(WAeUPEditFormPage):
    """ Page to manage course tickets
    """
    grok.context(ICourseTicket)
    grok.name('manage')
    grok.require('waeup.manageStudents')
    form_fields = grok.AutoFields(ICourseTicket)
    grok.template('courseticketmanagepage')
    pnav = 4

    @property
    def title(self):
        return 'Course Ticket %s' % self.context.code

    @property
    def label(self):
        return 'Manage course ticket %s' % self.context.code

    @grok.action('Save')
    def save(self, **data):
        msave(self, **data)
        return

class PaymentsDisplayFormPage(WAeUPDisplayFormPage):
    """ Page to display the student payments
    """
    grok.context(IStudentPayments)
    grok.name('index')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentPayments)
    #grok.template('paymentspage')
    title = 'Payments'
    pnav = 4

    @property
    def label(self):
        return '%s: Payments' % self.context.__parent__.fullname

class AccommodationDisplayFormPage(WAeUPDisplayFormPage):
    """ Page to display the student accommodation data
    """
    grok.context(IStudentAccommodation)
    grok.name('index')
    grok.require('waeup.viewStudent')
    form_fields = grok.AutoFields(IStudentAccommodation)
    #grok.template('accommodationpage')
    title = 'Accommodation'
    pnav = 4

    @property
    def label(self):
        return '%s: Accommodation Data' % self.context.__parent__.fullname

class StudentHistoryPage(WAeUPPage):
    """ Page to display student clearance data
    """
    grok.context(IStudent)
    grok.name('history')
    grok.require('waeup.viewStudent')
    grok.template('studenthistory')
    title = 'History'
    pnav = 4

    @property
    def label(self):
        return '%s: History' % self.context.fullname

# Pages for students only

class StudentBaseEditActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudent)
    grok.view(StudentBaseDisplayFormPage)
    grok.require('waeup.handleStudent')
    text = 'Change password'
    target = 'bedit'

class StudentPasswordSetting(grok.Adapter):
    """Adapt IStudent to data needed for password settings.

    We provide password getters/setters for the attached context (an
    IStudent object) that cooperate seamless with the usual
    formlib/form techniques.
    """
    grok.context(IStudent)
    grok.provides(IStudentPasswordSetting)

    def __init__(self, context):
        self.name = context.fullname
        self.password_repeat = context.password
        self.context = context
        return

    def getPassword(self):
        return self.context.password

    def setPassword(self, password):
        IUserAccount(self.context).setPassword(password)
        return

    password = property(getPassword, setPassword)

class StudentBaseEditFormPage(WAeUPEditFormPage):
    """ View to edit student base data by student
    """
    grok.context(IStudent)
    grok.name('bedit')
    grok.require('waeup.handleStudent')
    #form_fields = grok.AutoFields(IStudentBaseEdit).omit(
    #    'student_id', 'reg_number', 'matric_number')
    form_fields = grok.AutoFields(IStudentPasswordSetting)
    grok.template('baseeditpage')
    label = 'Change password'
    title = 'Base Data'
    pnav = 4

    def update(self):
        super(StudentBaseEditFormPage, self).update()
        self.wf_info = IWorkflowInfo(self.context)
        return

    def onFailure(self, action, data, errors):
        new_status = []
        other_errors = False
        for error in errors:
            msg = getattr(error, 'message', '')
            if isinstance(msg, basestring) and msg != '':
                new_status.append(msg)
            else:
                other_errors = True
        if other_errors:
            if new_status:
                new_status.append('see below for further errors')
            else:
                new_status.append('See below for details.')
        if new_status:
            self.status = u'There were errors: %s' % ', '.join(new_status)
        return

    @grok.action('Save', failure=onFailure)
    def save(self, **data):
        self.applyData(self.context, **data)
        self.flash('Form has been saved.')
        return

class StudentClearanceStartActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudent)
    grok.view(StudentClearanceDisplayFormPage)
    grok.require('waeup.handleStudent')
    icon = 'actionicon_start.png'
    text = 'Start clearance'
    target = 'start_clearance'

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

class StartClearancePage(WAeUPPage):
    grok.context(IStudent)
    grok.name('start_clearance')
    grok.require('waeup.handleStudent')
    grok.template('enterpin')
    title = 'Start clearance'
    label = 'Start clearance'
    ac_prefix = 'CLR'
    notice = ''
    pnav = 4
    buttonname = 'Start clearance now'

    def update(self, SUBMIT=None):
        self.ac_series = self.request.form.get('ac_series', None)
        self.ac_number = self.request.form.get('ac_number', None)

        if SUBMIT is None:
            return
        pin = '%s-%s-%s' % (self.ac_prefix, self.ac_series, self.ac_number)
        code = get_access_code(pin)
        if not code:
            self.flash('Access code is invalid.')
            return
        # Mark pin as used (this also fires a pin related transition)
        # and fire transition start_clearance
        if code.state == USED:
            self.flash('Access code has already been used.')
            return
        else:
            comment = u"AC invalidated for %s" % self.context.student_id
            # Here we know that the ac is in state initialized so we do not
            # expect an exception
            invalidate_accesscode(pin,comment)
            self.context.clr_code = pin
        IWorkflowInfo(self.context).fireTransition('start_clearance')
        self.flash('Clearance process has been started.')
        self.redirect(self.url(self.context,'cedit'))
        return

class StudentClearanceEditActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudent)
    grok.view(StudentClearanceDisplayFormPage)
    grok.require('waeup.handleStudent')
    text = 'Edit'
    target = 'cedit'

    @property
    def target_url(self):
        if self.context.clearance_locked:
            return ''
        return self.view.url(self.view.context, self.target)

class StudentClearanceEditFormPage(StudentClearanceManageFormPage):
    """ View to edit student clearance data by student
    """
    grok.context(IStudent)
    grok.name('cedit')
    grok.require('waeup.handleStudent')
    form_fields = grok.AutoFields(
        IStudentClearanceEdit).omit('clearance_locked')
    label = 'Edit clearance data'
    title = 'Clearance Data'
    pnav = 4
    form_fields['date_of_birth'].custom_widget = FriendlyDateWidget('le-year')

    def emitLockMessage(self):
        self.flash('The requested form is locked (read-only).')
        self.redirect(self.url(self.context))
        return

    def update(self):
        if self.context.clearance_locked:
            self.emitLockMessage()
            return
        datepicker.need()
        return super(StudentClearanceEditFormPage, self).update()

    @grok.action('Save')
    def save(self, **data):
        self.applyData(self.context, **data)
        self.flash('Clearance form has been saved.')
        return

    @grok.action('Save and request clearance')
    def requestclearance(self, **data):
        self.applyData(self.context, **data)
        self.context._p_changed = True
        #if self.dataNotComplete():
        #    self.flash(self.dataNotComplete())
        #    return
        self.flash('Clearance form has been saved.')
        self.redirect(self.url(self.context,'request_clearance'))
        return

class RequestClearancePage(WAeUPPage):
    grok.context(IStudent)
    grok.name('request_clearance')
    grok.require('waeup.handleStudent')
    grok.template('enterpin')
    title = 'Request clearance'
    label = 'Request clearance'
    notice = 'Enter the CLR access code used for starting clearance.'
    ac_prefix = 'CLR'
    pnav = 4
    buttonname = 'Request clearance now'

    def update(self, SUBMIT=None):
        self.ac_series = self.request.form.get('ac_series', None)
        self.ac_number = self.request.form.get('ac_number', None)
        if SUBMIT is None:
            return
        pin = '%s-%s-%s' % (self.ac_prefix, self.ac_series, self.ac_number)
        if self.context.clr_code != pin:
            self.flash("This isn't your CLR access code.")
            return
        state = IWorkflowState(self.context).getState()
        # This shouldn't happen, but the application officer
        # might have forgotten to lock the form after changing the state
        if state != CLEARANCE:
            self.flash('This form cannot be submitted. Wrong state!')
            return
        IWorkflowInfo(self.context).fireTransition('request_clearance')
        self.flash('Clearance has been requested.')
        self.redirect(self.url(self.context))
        return

class AddStudyLevelActionButton(AddActionButton):
    grok.order(1)
    grok.context(IStudentStudyCourse)
    grok.view(StudyCourseDisplayFormPage)
    grok.require('waeup.handleStudent')
    text = 'Add course list'
    target = 'add'

    @property
    def target_url(self):
        student = self.view.context.getStudent()
        condition1 = student.state != 'school fee paid'
        condition2 = str(student['studycourse'].current_level) in \
            self.view.context.keys()
        if condition1 or condition2:
            return ''
        return self.view.url(self.view.context, self.target)

class AddStudyLevelFormPage(WAeUPEditFormPage):
    """ Page for students to add current study levels
    """
    grok.context(IStudentStudyCourse)
    grok.name('add')
    grok.require('waeup.handleStudent')
    grok.template('studyleveladdpage')
    form_fields = grok.AutoFields(IStudentStudyCourse)
    title = 'Study Course'
    pnav = 4

    @property
    def label(self):
        studylevelsource = StudyLevelSource().factory
        code = self.context.current_level
        title = studylevelsource.getTitle(self.context, code)
        return 'Add current level %s' % title

    def emitLockMessage(self):
        self.flash('The requested form is locked (read-only).')
        self.redirect(self.url(self.context))
        return

    def update(self):
        if self.context.getStudent().state != 'school fee paid':
            self.emitLockMessage()
            return
        super(AddStudyLevelFormPage, self).update()
        return

    @grok.action('Create course list now')
    def addStudyLevel(self, **data):
        studylevel = StudentStudyLevel()
        studylevel.level = self.context.current_level
        studylevel.level_session = self.context.current_session
        try:
            self.context.addStudentStudyLevel(
                self.context.certificate,studylevel)
        except KeyError:
            self.flash('This level exists.')
        self.redirect(self.url(self.context))
        return

class StudyLevelEditActionButton(ManageActionButton):
    grok.order(1)
    grok.context(IStudentStudyLevel)
    grok.view(StudyLevelDisplayFormPage)
    grok.require('waeup.handleStudent')
    text = 'Add and remove courses'
    target = 'edit'

    @property
    def target_url(self):
        student = self.view.context.getStudent()
        condition1 = student.state != 'school fee paid'
        condition2 = student[
            'studycourse'].current_level != self.view.context.level
        if condition1 or condition2:
            return ''
        return self.view.url(self.view.context, self.target)

class StudyLevelEditFormPage(WAeUPEditFormPage):
    """ Page to edit the student study level data by students
    """
    grok.context(IStudentStudyLevel)
    grok.name('edit')
    grok.require('waeup.handleStudent')
    grok.template('studyleveleditpage')
    form_fields = grok.AutoFields(IStudentStudyLevel).omit(
        'level_session', 'level_verdict')
    pnav = 4

    def update(self):
        super(StudyLevelEditFormPage, self).update()
    #    tabs.need()
        datatable.need()
        return

    @property
    def title(self):
        return 'Study Level %s' % self.context.level_title

    @property
    def label(self):
        return 'Add and remove course tickets of study level %s' % self.context.level_title

    @property
    def total_credits(self):
        total_credits = 0
        for key, val in self.context.items():
            total_credits += val.credits
        return total_credits

    @grok.action('Add course ticket')
    def addCourseTicket(self, **data):
        self.redirect(self.url(self.context, 'ctadd'))

    @grok.action('Remove selected tickets')
    def delCourseTicket(self, **data):
        form = self.request.form
        if form.has_key('val_id'):
            child_id = form['val_id']
        else:
            self.flash('No ticket selected.')
            self.redirect(self.url(self.context, '@@edit'))
            return
        if not isinstance(child_id, list):
            child_id = [child_id]
        deleted = []
        for id in child_id:
            # Student are not allowed to remove core tickets
            if not self.context[id].core_or_elective:
                try:
                    del self.context[id]
                    deleted.append(id)
                except:
                    self.flash('Could not delete %s: %s: %s' % (
                            id, sys.exc_info()[0], sys.exc_info()[1]))
        if len(deleted):
            self.flash('Successfully removed: %s' % ', '.join(deleted))
        self.redirect(self.url(self.context, u'@@edit'))
        return

    @grok.action('Register course list')
    def register_courses(self, **data):
        state = IWorkflowState(self.context.getStudent()).getState()
        IWorkflowInfo(self.context.getStudent()).fireTransition('register_courses')
        self.flash('Course list has been registered.')
        self.redirect(self.url(self.context))
        return

class CourseTicketAddFormPage2(CourseTicketAddFormPage):
    """Add a course ticket by student.
    """
    grok.name('ctadd')
    grok.require('waeup.handleStudent')
    form_fields = grok.AutoFields(ICourseTicketAdd).omit(
        'grade', 'score', 'core_or_elective', 'automatic')

    @grok.action('Add course ticket')
    def addCourseTicket(self, **data):
        ticket = CourseTicket()
        course = data['course']
        ticket.automatic = False
        ticket.code = course.code
        ticket.title = course.title
        ticket.faculty = course.__parent__.__parent__.__parent__.title
        ticket.department = course.__parent__.__parent__.title
        ticket.credits = course.credits
        ticket.passmark = course.passmark
        ticket.semester = course.semester
        try:
            self.context.addCourseTicket(ticket)
        except KeyError:
            self.flash('The ticket exists.')
            return
        self.flash('Successfully added %s.' % ticket.code)
        self.redirect(self.url(self.context, u'@@edit'))
        return