"""Mass mailing form views

:organization: Logilab

:copyright: 2007-2010 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.

:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr

:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses

"""

__docformat__ = "restructuredtext en"

_ = unicode

import operator

from cubicweb.interfaces import IEmailable

from cubicweb.view import EntityView

from cubicweb.web import stdmsgs, action, form, formfields as ff

from cubicweb.web.formwidgets import CheckBox, TextInput, AjaxWidget, ImgButton

from cubicweb.web.views import forms, formrenderers

class SendEmailAction(action.Action):

    __regid__ = 'sendemail'

    # XXX should check email is set as well

    __select__ = (action.Action.__select__ & implements(IEmailable)

    title = _('send email')

    category = 'mainactions'

    def url(self):

        params = {'vid': 'massmailing', '__force_display': 1}

        if self._cw.form.has_key('rql'):

            params['rql'] = self._cw.form['rql']

        return self._cw.build_url(self._cw.relative_path(includeparams=False),

                                  **params)

def recipient_vocabulary(form, field):

    vocab = [(entity.get_email(), entity.eid) for entity in form.cw_rset.entities()]

    return [(label, value) for label, value in vocab if label]

class MassMailingForm(forms.FieldsForm):

    __regid__ = 'massmailing'

    sender = ff.StringField(widget=TextInput({'disabled': 'disabled'}),

                            label=_('From:'),

                            value=lambda f: '%s <%s>' % (f._cw.user.dc_title(), f._cw.user.get_email()))

    recipient = ff.StringField(widget=CheckBox(), label=_('Recipients:'),

                               choices=recipient_vocabulary,

                               value= lambda f: [entity.eid for entity in f.cw_rset.entities() if entity.get_email()])

    subject = ff.StringField(label=_('Subject:'), max_length=256)

    mailbody = ff.StringField(widget=AjaxWidget(wdgtype='TemplateTextField',

                                                inputid='mailbody'))

    form_buttons = [ImgButton('sendbutton', "javascript: $('#sendmail').submit()",

                              _('send email'), 'SEND_EMAIL_ICON'),

                    ImgButton('cancelbutton', "javascript: history.back()",

                              stdmsgs.BUTTON_CANCEL, 'CANCEL_EMAIL_ICON')]

    form_renderer_id = __regid__

    def __init__(self, *args, **kwargs):

        super(MassMailingForm, self).__init__(*args, **kwargs)

        field = self.field_by_name('mailbody')

        field.widget.attrs['cubicweb:variables'] = ','.join(self.get_allowed_substitutions())

    def get_allowed_substitutions(self):

        attrs = []

        for coltype in self.cw_rset.column_types(0):

            eclass = self._cw.vreg['etypes'].etype_class(coltype)

            attrs.append(eclass.allowed_massmail_keys())

        return sorted(reduce(operator.and_, attrs))

    def build_substitutions_help(self):

        insertLink = u'<a href="javascript: insertText(\'%%(%s)s\', \'emailarea\');">%%(%s)s</a>'

        substs = (u'<div class="substitution">%s</div>' % (insertLink % (subst, subst))

                  for subst in self.get_allowed_substitutions())

        helpmsg = self._cw._('You can use any of the following substitutions in your text')

        return u'<div id="substitutions"><span>%s</span>%s</div>' % (

            helpmsg, u'\n'.join(substs))

class MassMailingFormRenderer(formrenderers.FormRenderer):

    __regid__ = 'massmailing'

    def _render_fields(self, fields, w, form):

        w(u'<table class="headersform">')

        for field in fields:

            if field.name == 'mailbody':

                w(u'</table>')

                self._render_toolbar(w, form)

                w(u'<table>')

                w(u'<tr><td><div>')

            else:

                w(u'<tr>')

                w(u'<td class="hlabel">%s</td>' % self.render_label(form, field))

                w(u'<td class="hvalue">')

            w(field.render(form, self))

            if field.name == 'mailbody':

                w(u'</div></td>')

                w(u'<td>%s</td>' % form.build_substitutions_help())

                w(u'</tr>')

            else:

                w(u'</td></tr>')

        w(u'</table>')

    def _render_toolbar(self, w, form):

        w(u'<div id="toolbar">')

        w(u'<ul>')

        for button in form.form_buttons:

            w(u'<li>%s</li>' % button.render(form))

        w(u'</ul>')

        w(u'</div>')

    def render_buttons(self, w, form):

        pass

class MassMailingFormView(form.FormViewMixIn, EntityView):

    __regid__ = 'massmailing'

    def call(self):

        self.w(form.render())