##
## browser.py
## Login : <uli@pu.smp.net>
## Started on  Sun Jun 27 11:03:10 2010 Uli Fouquet
## $Id$
##
## Copyright (C) 2010 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 sys
import grok

from zope.component import getUtility
from zope.formlib.widget import CustomWidgetFactory
from zope.interface import Invalid
from zope.securitypolicy.interfaces import IPrincipalRoleManager

from waeup.sirp.browser import (
    WAeUPPage, WAeUPEditFormPage, WAeUPAddFormPage,
    WAeUPDisplayFormPage, NullValidator)
from waeup.sirp.browser.breadcrumbs import Breadcrumb
from waeup.sirp.browser.layout import NullValidator
from waeup.sirp.browser.resources import datepicker, tabs, datatable
from waeup.sirp.browser.viewlets import ManageActionButton, PrimaryNavTab
from waeup.sirp.image.browser.widget import (
    ThumbnailWidget, EncodingImageFileWidget,
    )
from waeup.sirp.interfaces import IWAeUPObject
from waeup.sirp.widgets.datewidget import (
    FriendlyDateWidget, FriendlyDateDisplayWidget)
from waeup.sirp.widgets.restwidget import ReSTDisplayWidget
from waeup.sirp.widgets.objectwidget import (
    WAeUPObjectWidget, WAeUPObjectDisplayWidget)
from waeup.sirp.widgets.multilistwidget import (
    MultiListWidget, MultiListDisplayWidget)

from waeup.sirp.applicants import ResultEntry, Applicant
from waeup.sirp.applicants.interfaces import (
    IApplicant, IApplicantPrincipal, IApplicantPDEEditData,
    IApplicantsRoot, IApplicantsContainer, IApplicantsContainerProvider,
    IApplicantsContainerAdd, application_types_vocab
    )

results_widget = CustomWidgetFactory(
    WAeUPObjectWidget, ResultEntry)

results_display_widget = CustomWidgetFactory(
    WAeUPObjectDisplayWidget, ResultEntry)

list_results_widget = CustomWidgetFactory(
    MultiListWidget, subwidget=results_widget)

list_results_display_widget = CustomWidgetFactory(
    MultiListDisplayWidget, subwidget=results_display_widget)

class ApplicantsRootPage(WAeUPPage):
    grok.context(IApplicantsRoot)
    grok.name('index')
    title = 'Applicants'
    label = 'Application Section'
    pnav = 3

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

class ManageApplicantsRootActionButton(ManageActionButton):
    grok.context(IApplicantsRoot)
    grok.view(ApplicantsRootPage)
    grok.require('waeup.manageUniversity')
    text = 'Manage application section'

class ApplicantsRootManageFormPage(WAeUPEditFormPage):
    grok.context(IApplicantsRoot)
    grok.name('manage')
    grok.template('applicantsrootmanagepage')
    title = 'Applicants'
    label = 'Manage application section'
    pnav = 3
    grok.require('waeup.manageUniversity')
    taboneactions = ['Add applicants container', 'Remove selected','Cancel']
    subunits = 'Applicants Containers'

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

    # ToDo: Show warning message before deletion
    @grok.action('Remove selected')
    def delApplicantsContainers(self, **data):
        form = self.request.form
        child_id = form['val_id']
        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, '@@manage')+'#tab-1')
        return

    @grok.action('Add applicants container', validator=NullValidator)
    def addApplicantsContainer(self, **data):
        self.redirect(self.url(self.context, '@@add'))
        return

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

class ApplicantsContainerAddFormPage(WAeUPAddFormPage):
    grok.context(IApplicantsRoot)
    grok.require('waeup.manageUniversity')
    grok.name('add')
    grok.template('applicantscontaineraddpage')
    title = 'Applicants'
    label = 'Add applicants container'
    pnav = 3

    form_fields = grok.AutoFields(
        IApplicantsContainerAdd).omit('code').omit('title')
    form_fields['startdate'].custom_widget = FriendlyDateWidget('le')
    form_fields['enddate'].custom_widget = FriendlyDateWidget('le')

    def update(self):
        datepicker.need() # Enable jQuery datepicker in date fields.
        #from waeup.sirp.browser.resources import jqueryui
        #jqueryui.need()
        return super(ApplicantsContainerAddFormPage, self).update()

    @grok.action('Add applicants container')
    def addApplicantsContainer(self, **data):
        year = data['year']
        code = u'%s%s' % (data['prefix'], year)
        prefix = application_types_vocab.getTerm(data['prefix'])
        title = u'%s %s/%s' % (prefix.title, year, year + 1)
        if code in self.context.keys():
            self.flash(
                'An applicants container for the same application '
                'type and entrance year exists already in the database.')
            return
        # Add new applicants container...
        provider = data['provider'][1]
        container = provider.factory()
        self.applyData(container, **data)
        container.code = code
        container.title = title
        self.context[code] = container
        self.flash('Added: "%s".' % code)
        self.redirect(self.url(self.context, u'@@manage')+'#tab-1')
        return

    @grok.action('Cancel', validator=NullValidator)
    def cancel(self, **data):
        self.redirect(self.url(self.context, '@@manage') + '#tab-1')

class ApplicantsRootBreadcrumb(Breadcrumb):
    """A breadcrumb for applicantsroot.
    """
    grok.context(IApplicantsRoot)
    title = u'Applicants'

class ApplicantsContainerBreadcrumb(Breadcrumb):
    """A breadcrumb for applicantscontainers.
    """
    grok.context(IApplicantsContainer)

class ApplicantsTab(PrimaryNavTab):
    """Faculties-tab in primary navigation.
    """

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

    pnav = 3
    tab_title = u'Applicants'

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

class ApplicantsContainerPage(WAeUPDisplayFormPage):
    """The standard view for regular applicant containers.
    """
    grok.context(IApplicantsContainer)
    grok.name('index')
    grok.template('applicantscontainerpage')
    pnav = 3

    form_fields = grok.AutoFields(IApplicantsContainer).omit('title')
    form_fields['startdate'].custom_widget = FriendlyDateDisplayWidget('le')
    form_fields['enddate'].custom_widget = FriendlyDateDisplayWidget('le')
    form_fields['description'].custom_widget = ReSTDisplayWidget

    @property
    def title(self):
        return "Applicants Container: %s" % self.context.title

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

class ApplicantsContainerManageActionButton(ManageActionButton):
    grok.context(IApplicantsContainer)
    grok.view(ApplicantsContainerPage)
    text = 'Manage applicants container'


class ApplicantsContainerManageFormPage(WAeUPEditFormPage):
    grok.context(IApplicantsContainer)
    grok.name('manage')
    grok.template('applicantscontainermanagepage')
    form_fields = grok.AutoFields(IApplicantsContainer).omit('title')
    taboneactions = ['Save','Cancel']
    tabtwoactions = ['Add applicant', 'Remove selected','Cancel']
    # Use friendlier date widget...
    form_fields['startdate'].custom_widget = FriendlyDateWidget('le')
    form_fields['enddate'].custom_widget = FriendlyDateWidget('le')

    @property
    def title(self):
        return "Applicants Container: %s" % self.context.title

    @property
    def label(self):
        return 'Manage applicants container'

    pnav = 3

    def update(self):
        datepicker.need() # Enable jQuery datepicker in date fields.
        tabs.need()
        datatable.need()  # Enable jQurey datatables for contents listing
        return super(ApplicantsContainerManageFormPage, self).update()

    @grok.action('Save')
    def apply(self, **data):
        self.applyData(self.context, **data)
        self.flash('Data saved.')
        return

    # ToDo: Show warning message before deletion
    @grok.action('Remove selected')
    def delApplicant(self, **data):
        return self.flash('Removal of applicants is not yet implemented!')

    @grok.action('Add applicant', validator=NullValidator)
    def addApplicant(self, **data):
        return self.flash('Manual addition of applicants not yet implemented!')

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


class LoginApplicant(WAeUPPage):
    grok.context(IApplicantsContainer)
    grok.name('login')
    grok.require('zope.Public')

    @property
    def title(self):
        return u"Applicant Login: %s" % self.context.title

    @property
    def label(self):
        return u'Login for applicants only'

    pnav = 3
    
    @property
    def ac_prefix(self):
        return self.context.ac_prefix

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

        if self.request.principal.id == 'zope.anybody':
            self.flash('Entered credentials are invalid.')
            return

        if not IApplicantPrincipal.providedBy(self.request.principal):
            # Don't care if user is already authenticated as non-applicant
            return

        pin = self.request.principal.access_code
        if pin not in self.context.keys():
            # Create applicant record
            applicant = Applicant()
            applicant.access_code = pin
            self.context[pin] = applicant

        # Assign current principal the owner role on created applicant
        # record
        role_manager = IPrincipalRoleManager(self.context)
        role_manager.assignRoleToPrincipal(
            'waeup.local.ApplicationOwner', self.request.principal.id)
        self.redirect(self.url(self.context[pin], 'edit'))
        return

class DisplayApplicant(WAeUPDisplayFormPage):
    grok.context(IApplicant)
    grok.name('index')
    grok.require('waeup.viewApplication')
    form_fields = grok.AutoFields(IApplicant).omit('locked')
    form_fields['fst_sit_results'].custom_widget = list_results_display_widget
    form_fields['passport'].custom_widget = ThumbnailWidget
    form_fields['date_of_birth'].custom_widget = FriendlyDateDisplayWidget('le')
    label = 'Applicant'
    title = 'Applicant'
    pnav = 3

class EditApplicantStudent(WAeUPEditFormPage):
    """An applicant-centered edit view for applicant data.
    """
    grok.context(IApplicant)
    grok.name('edit')
    grok.require('waeup.editApplication')
    form_fields = grok.AutoFields(IApplicantPDEEditData).omit('locked')
    form_fields['passport'].custom_widget = EncodingImageFileWidget
    form_fields['date_of_birth'].custom_widget = FriendlyDateWidget('le-year')
    grok.template('form_edit_pde')

    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.locked:
            self.emitLockMessage()
            return
        datepicker.need() # Enable jQuery datepicker in date fields.
        super(EditApplicantStudent, self).update()
        return

    def filteredWidgets(self):
        for widget in self.widgets:
            if widget.name == 'form.confirm_passport':
                continue
            yield widget

    @property
    def label(self):
        # XXX: Use current/upcoming session
        return 'Apply for Post UDE Screening Test (2009/2010)'
    title = 'Edit Application'
    pnav = 3

    @grok.action('Save')
    def save(self, **data):
        if self.context.locked:
            self.emitLockMessage()
            return
        self.applyData(self.context, **data)
        self.context._p_changed = True
        return

    @grok.action('Final Submit')
    def finalsubmit(self, **data):
        if self.context.locked:
            self.emitLockMessage()
            return
        self.applyData(self.context, **data)
        self.context._p_changed = True
        if not self.dataComplete():
            self.flash('Data yet not complete.')
            return
        self.context.locked = True
        return

    def dataComplete(self):
        if self.context.confirm_passport is not True:
            return False
        if len(self.errors) > 0:
            return False
        return True

class EditApplicantFull(WAeUPEditFormPage):
    """A full edit view for applicant data.

    This one is meant to be used by officers only.
    """
    grok.context(IApplicant)
    grok.name('edit_full')
    grok.require('waeup.editFullApplication')
    form_fields = grok.AutoFields(IApplicantPDEEditData).omit('locked')
    form_fields['passport'].custom_widget = EncodingImageFileWidget
    form_fields['date_of_birth'].custom_widget = FriendlyDateWidget('le-year')
    grok.template('form_edit_full')

    def update(self):
        if self.context.locked:
            self.emitLockMessage()
            return
        datepicker.need() # Enable jQuery datepicker in date fields.
        super(EditApplicantFull, self).update()
        return

    def filteredWidgets(self):
        for widget in self.widgets:
            if widget.name == 'form.confirm_passport':
                continue
            yield widget

    @property
    def label(self):
        return 'Application for %s' % self.context.access_code
    title = 'Edit Application'
    pnav = 3

    @grok.action('Save')
    def save(self, **data):
        self.applyData(self.context, **data)
        self.context._p_changed = True
        return