"""Set of HTML automatic forms to create, delete, copy or edit a single entity

or a list of entities of the same type

:organization: Logilab

:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

"""

__docformat__ = "restructuredtext en"

from copy import copy

from simplejson import dumps

from logilab.mtconverter import html_escape

from logilab.common.decorators import cached

from cubicweb.selectors import (specified_etype_implements, implements,

                                match_kwargs, match_form_params, one_line_rset,

                                non_final_entity, accepts_etype_compat)

from cubicweb.utils import make_uid

from cubicweb.view import View, EntityView

from cubicweb.common import tags

from cubicweb.common.uilib import cut

from cubicweb.web import INTERNAL_FIELD_VALUE, stdmsgs, eid_param

from cubicweb.web.controller import NAV_FORM_PARAMETERS

from cubicweb.web.form import MultipleFieldsForm, EntityFieldsForm, FormMixIn, FormRenderer

from cubicweb.web.formfields import StringField,  RichTextField, guess_field

from cubicweb.web.formwidgets import HiddenInput

_ = unicode

class DeleteConfForm(EntityView):

    id = 'deleteconf'

    title = _('delete')

    domid = 'deleteconf'

    onsubmit = None

    # don't use navigation, all entities asked to be deleted should be displayed

    # else we will only delete the displayed page

    need_navigation = False

    def call(self):

        """ask for confirmation before real deletion"""

        req, w = self.req, self.w

        _ = req._

        w(u'<script type="text/javascript">updateMessage(\'%s\');</script>\n'

          % _('this action is not reversible!'))

        # XXX above message should have style of a warning

        w(u'<h4>%s</h4>\n' % _('Do you want to delete the following element(s) ?'))

        form = MultipleFieldsForm(req, domid='deleteconf', action=self.build_url('edit'),

                                  onsubmit=self.onsubmit, copy_nav_params=True)

        form.buttons.append(form.button_delete(label=stdmsgs.YES))

        form.buttons.append(form.button_cancel(label=stdmsgs.NO))

        done = set()

        w(u'<ul>\n')

        for i in xrange(self.rset.rowcount):

            if self.rset[i][0] in done:

                continue

            done.add(self.rset[i][0])

            entity = self.rset.get_entity(i, 0)

            subform = EntityFieldsForm(req, set_error_url=False,

                                       entity=entity)

            form.form_add_subform(subform)

            # don't use outofcontext view or any other that may contain inline edition form

            w(u'<li>%s</li>' % tags.a(entity.view('textoutofcontext'),

                                      href=entity.absolute_url()))

        w(u'</ul>\n')

        w(form.form_render())

class ClickAndEditForm(FormMixIn, EntityView):

    id = 'reledit'

    __select__ = non_final_entity() & match_kwargs('rtype')

    # FIXME editableField class could be toggleable from userprefs

    def cell_call(self, row, col, rtype=None, role='subject', reload=False):

        entity = self.entity(row, col)

        if getattr(entity, rtype) is None:

            value = self.req._('not specified')

        else:

            value = entity.printable_value(rtype)

        if not entity.has_perm('update'):

            self.w(value)

            return

        self.req.add_js( ('cubicweb.ajax.js',) )

        eid = entity.eid

        edit_key = make_uid('%s-%s' % (rtype, eid))

        divid = 'd%s' % edit_key

        reload = dumps(reload)

        buttons = [tags.input(klass="validateButton", type="submit", name="__action_apply",

                              value=self.req._(stdmsgs.BUTTON_OK), tabindex=self.req.next_tabindex()),

                   tags.input(klass="validateButton", type="button",

                              value=self.req._(stdmsgs.BUTTON_CANCEL),

                              onclick="cancelInlineEdit(%s,\'%s\',\'%s\')" % (eid, rtype, divid),

                              tabindex=self.req.next_tabindex())]

        form = self.vreg.select_object('forms', 'edition', self.req, self.rset, row=row, col=col,

                                       entity=entity, domid='%s-form' % divid, action='#',

                                       cssstyle='display: none', buttons=buttons,

                                       onsubmit="return inlineValidateForm('%(divid)s-form', '%(rtype)s', '%(eid)s', '%(divid)s', %(reload)s);" % locals())

        renderer = FormRenderer(display_label=False, display_help=False,

                                display_fields=(rtype,), button_bar_class='buttonbar')

        self.w(tags.div(value, klass='editableField', id=divid,

                        ondblclick="showInlineEditionForm(%(eid)s, '%(rtype)s', '%(divid)s')" % locals()))

        self.w(form.render(renderer=renderer))

class AutomaticEntityForm(EntityFieldsForm):

    id = 'edition'

    needs_js = EntityFieldsForm.needs_js + ('cubicweb.ajax.js',)

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

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

        self.entity.complete()

        for rschema, target in self.editable_attributes(entity):

            field = guess_field(entity.__class__, entity.e_schema, rschema, target)

            self.fields.append(field)

    def form_buttons(self):

        return [self.button_ok(tabindex=self.req.next_tabindex()),

                self.button_apply(tabindex=self.req.next_tabindex()),

                self.button_cancel(tabindex=self.req.next_tabindex())]

    def editable_attributes(self, entity):

        # XXX both (add, delete) required for non final relations

        return [(rschema, x) for rschema, _, x in entity.relations_by_category(('primary', 'secondary'), 'add')

                if rschema != 'eid']

class _EditionForm(EntityView):

    """primary entity edition form

    When generating a new attribute_input, the editor will look for a method

    named 'default_ATTRNAME' on the entity instance, where ATTRNAME is the

    name of the attribute being edited. You may use this feature to compute

    dynamic default values such as the 'tomorrow' date or the user's login

    being connected

    """    

    id = 'edition'

    __select__ = one_line_rset() & non_final_entity()

    title = _('edition')

    controller = 'edit'

    skip_relations = FormMixIn.skip_relations.copy()

    def cell_call(self, row, col, **kwargs):

        self.req.add_js( ('cubicweb.ajax.js',) )

        self.initialize_varmaker()

        entity = self.complete_entity(row, col)

    def initialize_varmaker(self):

        varmaker = self.req.get_page_data('rql_varmaker')

        if varmaker is None:

            varmaker = self.req.varmaker

            self.req.set_page_data('rql_varmaker', varmaker)

        self.varmaker = varmaker

    def edit_form(self, entity, kwargs):

        form = EntityFieldsForm(self.req, entity=entity)

        for rschema, target in self.editable_attributes(entity):

            field = guess_field(entity.__class__, entity.e_schema, rschema, target)

            form.fields.append(field)

        form.buttons.append(form.button_ok())

        form.buttons.append(form.button_apply())

        form.buttons.append(form.button_cancel())

        self.w(form.form_render())

    def editable_attributes(self, entity):

        # XXX both (add, delete)

        return [(rschema, x) for rschema, _, x in entity.relations_by_category(('primary', 'secondary'), 'add')

                if rschema != 'eid']