## $Id: pdf.py 8091 2012-04-10 10:43:50Z uli $
##
## 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
##
"""
Generate PDF docs for applicants.
"""
import grok
from reportlab.lib.styles import getSampleStyleSheet
from reportlab.lib.units import cm
from reportlab.platypus import Paragraph, Image, Table, Spacer
from zope.component import getUtility
from zope.formlib.form import setUpEditWidgets
from zope.i18n import translate
from zope.publisher.browser import TestRequest
from waeup.kofa.applicants.interfaces import IApplicant, IApplicantsUtils
from waeup.kofa.browser import DEFAULT_PASSPORT_IMAGE_PATH
from waeup.kofa.browser.interfaces import IPDFCreator
from waeup.kofa.interfaces import IExtFileStore, IPDF, IKofaUtils
from waeup.kofa.interfaces import MessageFactory as _
from waeup.kofa.widgets.datewidget import FriendlyDateDisplayWidget

class PDFApplicationSlip(grok.Adapter):
    """Create a PDF application slip for applicants.
    """
    # XXX: Many things in here are reusable. We might want to split
    # things. Possibly move parts to IPDFCreator?
    grok.context(IApplicant)
    grok.implements(IPDF)
    grok.name('application_slip')

    form_fields =  grok.AutoFields(IApplicant).omit(
        'locked', 'course_admitted')
    form_fields['date_of_birth'].custom_widget = FriendlyDateDisplayWidget('le')

    @property
    def title(self):
        container_title = self.context.__parent__.title
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        ar_translation = translate(_('Application Record'),
            'waeup.kofa', target_language=portal_language)
        return '%s - %s %s' % (container_title,
            ar_translation, self.context.application_number)

    def _getCourseAdmittedLink(self, view):
        """Return link, title and code in html format to the certificate
           admitted.
        """
        course_admitted = self.context.course_admitted
        if view is not None and getattr(course_admitted, '__parent__',None):
            url = view.url(course_admitted)
            title = course_admitted.title
            code = course_admitted.code
            return '<a href="%s">%s - %s</a>' %(url,code,title)
        return ''

    def _getDeptAndFaculty(self):
        """Return long titles of department and faculty.

        Returns a list [department_title, faculty_title]

        If the context applicant has no course admitted or dept. and
        faculty cannot be determined, ``None`` is returned.
        """
        course_admitted = self.context.course_admitted
        dept = getattr(
                getattr(course_admitted, '__parent__', None),
                '__parent__', None)
        faculty = getattr(dept, '__parent__', None)
        return [x is not None and x.longtitle() or x for x in dept, faculty]

    def _addComments(self, data):
        style = getSampleStyleSheet()
        if self.context.state == 'created':
            comment1 = _(
                '<font size=10>Proceed to the login page of the portal' +
                ' and enter your new credentials:' +
                ' user name= ${a}, password = ${b}.</font>', mapping = {
                    'a':self.context.student_id,
                    'b':self.context.application_number}
                )
            comment2 = _(
                '<font size=10>Change your password when you have ' +
                ' logged in.</font>'
                )
            comment1 = Paragraph(comment1, style["Normal"])
            comment2 = Paragraph(comment2, style["Normal"])
            data.extend([Spacer(1, 18), comment1, comment2])
        return data

    def __call__(self, view=None):
        """Return a PDF representation of the context applicant.

        If no `view` is given, the course admitted field will be an
        empty string and author will be set as ``'unknown'``.

        If a `view` is given, author will be set as the calling
        principal.
        """
        doc_title = '\n'.join([x.strip() for x in self.title.split('-')])
        style = getSampleStyleSheet()
        data = []
        portal_language = getUtility(IKofaUtils).PORTAL_LANGUAGE
        separators = getUtility(IApplicantsUtils).SEPARATORS_DICT
        creator = getUtility(IPDFCreator)

        # append history
        data.extend(creator.fromStringList(self.context.history.messages))

        # append photograph
        img_path = getattr(
            getUtility(IExtFileStore).getFileByContext(self.context),
            'name', DEFAULT_PASSPORT_IMAGE_PATH)
        data.append(creator.getImage(img_path))
        data.append(Spacer(1, 12))

        # append widgets
        dept, faculty = self._getDeptAndFaculty()
        data.append(creator.getWidgetsTable(
            self.form_fields, self.context, view, lang=portal_language,
            domain='waeup.kofa', separators=separators,
            course_label='Admitted Course of Study:',
            course_link=self._getCourseAdmittedLink(view),
            dept=dept, faculty=faculty))

        # append comments
        data = self._addComments(data)
        return creator.create_pdf(data, None, doc_title)