"""Some views used to help to the edition process

:organization: Logilab

:copyright: 2001-2009 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

from simplejson import dumps

from logilab.common.decorators import cached

from logilab.mtconverter import xml_escape

from cubicweb import typed_eid

from cubicweb.view import EntityView

from cubicweb.selectors import (one_line_rset, non_final_entity,

                                match_search_state, match_form_params)

from cubicweb.common.uilib import cut

from cubicweb.web.views import linksearch_select_url

from cubicweb.web.views.editforms import relation_id

from cubicweb.web.views.baseviews import FinalView

class SearchForAssociationView(EntityView):

    """view called by the edition view when the user asks to search for

    something to link to the edited eid

    """

    id = 'search-associate'

    __select__ = (one_line_rset() & match_search_state('linksearch')

                  & non_final_entity())

    title = _('search for association')

    def cell_call(self, row, col):

        rset, vid, divid, paginate = self.filter_box_context_info()

        self.rset = rset

        self.w(u'<div id="%s">' % divid)

        self.paginate()

        self.wview(vid, rset, 'noresult')

        self.w(u'</div>')

    @cached

    def filter_box_context_info(self):

        entity = self.entity(0, 0)

        role, eid, rtype, etype = self.req.search_state[1]

        assert entity.eid == typed_eid(eid)

        # the default behaviour is to fetch all unrelated entities and display

        # them. Use fetch_order and not fetch_unrelated_order as sort method

        # since the latter is mainly there to select relevant items in the combo

        # box, it doesn't give interesting result in this context

        rql = entity.unrelated_rql(rtype, etype, role,

                                   ordermethod='fetch_order',

                                   vocabconstraints=False)

        rset = self.req.execute(rql, {'x' : entity.eid}, 'x')

        return rset, 'list', "search-associate-content", True

class OutOfContextSearch(EntityView):

    id = 'outofcontext-search'

    def cell_call(self, row, col):

        entity = self.entity(row, col)

        erset = entity.as_rset()

        if self.req.match_search_state(erset):

            self.w(u'<a href="%s" title="%s">%s</a>&nbsp;<a href="%s" title="%s">[...]</a>' % (

                xml_escape(linksearch_select_url(self.req, erset)),

                self.req._('select this entity'),

                xml_escape(entity.view('textoutofcontext')),

                xml_escape(entity.absolute_url(vid='primary')),

                self.req._('view detail for this entity')))

        else:

            entity.view('outofcontext', w=self.w)

class UnrelatedDivs(EntityView):

    id = 'unrelateddivs'

    __select__ = match_form_params('relation')

    def cell_call(self, row, col):

        entity = self.entity(row, col)

        relname, target = self.req.form.get('relation').rsplit('_', 1)

        rschema = self.schema.rschema(relname)

        hidden = 'hidden' in self.req.form

        is_cell = 'is_cell' in self.req.form

        self.w(self.build_unrelated_select_div(entity, rschema, target,

                                               is_cell=is_cell, hidden=hidden))

    def build_unrelated_select_div(self, entity, rschema, target,

                                   is_cell=False, hidden=True):

        options = []

        divid = 'div%s_%s_%s' % (rschema.type, target, entity.eid)

        selectid = 'select%s_%s_%s' % (rschema.type, target, entity.eid)

        if rschema.symetric or target == 'subject':

            targettypes = rschema.objects(entity.e_schema)

            etypes = '/'.join(sorted(etype.display_name(self.req) for etype in targettypes))

        else:

            targettypes = rschema.subjects(entity.e_schema)

            etypes = '/'.join(sorted(etype.display_name(self.req) for etype in targettypes))

        etypes = cut(etypes, self.req.property_value('navigation.short-line-size'))

        options.append('<option>%s %s</option>' % (self.req._('select a'), etypes))

        options += self._get_select_options(entity, rschema, target)

        options += self._get_search_options(entity, rschema, target, targettypes)

        if 'Basket' in self.schema: # XXX

            options += self._get_basket_options(entity, rschema, target, targettypes)

        relname, target = self.req.form.get('relation').rsplit('_', 1)

        return u"""\

<div class="%s" id="%s">

  <select id="%s" onchange="javascript: addPendingInsert(this.options[this.selectedIndex], %s, %s, '%s');">

    %s

  </select>

</div>

""" % (hidden and 'hidden' or '', divid, selectid,

       xml_escape(dumps(entity.eid)), is_cell and 'true' or 'null', relname,

       '\n'.join(options))

    def _get_select_options(self, entity, rschema, target):

        """add options to search among all entities of each possible type"""

        options = []

        eid = entity.eid

        pending_inserts = self.req.get_pending_inserts(eid)

        rtype = rschema.type

        field = form.field_by_name(rschema, target, entity.e_schema)

        limit = self.req.property_value('navigation.combobox-limit')

        for eview, reid in form.form_field_vocabulary(field, limit):

            if reid is None:

                options.append('<option class="separator">-- %s --</option>'

                               % xml_escape(eview))

            else:

                optionid = relation_id(eid, rtype, target, reid)

                if optionid not in pending_inserts:

                    # prefix option's id with letters to make valid XHTML wise

                    options.append('<option id="id%s" value="%s">%s</option>' %

                                   (optionid, reid, xml_escape(eview)))

        return options

    def _get_search_options(self, entity, rschema, target, targettypes):

        """add options to search among all entities of each possible type"""

        options = []

        _ = self.req._

        for eschema in targettypes:

            mode = '%s:%s:%s:%s' % (target, entity.eid, rschema.type, eschema)

            url = self.build_url(entity.rest_path(), vid='search-associate',

                                 __mode=mode)

            options.append((eschema.display_name(self.req),

                            '<option value="%s">%s %s</option>' % (

                xml_escape(url), _('Search for'), eschema.display_name(self.req))))

        return [o for l, o in sorted(options)]

    def _get_basket_options(self, entity, rschema, target, targettypes):

        options = []

        rtype = rschema.type

        _ = self.req._

        for basketeid, basketname in self._get_basket_links(self.req.user.eid,

                                                            target, targettypes):

            optionid = relation_id(entity.eid, rtype, target, basketeid)

            options.append('<option id="%s" value="%s">%s %s</option>' % (

                optionid, basketeid, _('link to each item in'), xml_escape(basketname)))

        return options

    def _get_basket_links(self, ueid, target, targettypes):

        targettypes = set(targettypes)

        for basketeid, basketname, elements in self._get_basket_info(ueid):

            baskettypes = elements.column_types(0)

            # if every elements in the basket can be attached to the

            # edited entity

            if baskettypes & targettypes:

                yield basketeid, basketname

    def _get_basket_info(self, ueid):

        basketref = []

        basketrql = 'Any B,N WHERE B is Basket, B owned_by U, U eid %(x)s, B name N'

        basketresultset = self.req.execute(basketrql, {'x': ueid}, 'x')

        for result in basketresultset:

            basketitemsrql = 'Any X WHERE X in_basket B, B eid %(x)s'

            rset = self.req.execute(basketitemsrql, {'x': result[0]}, 'x')

            basketref.append((result[0], result[1], rset))

        return basketref

class ComboboxView(EntityView):

    """the view used in combobox (unrelated entities)

    THIS IS A TEXT VIEW. DO NOT HTML_ESCAPE

    """

    id = 'combobox'

    title = None

    def cell_call(self, row, col):

        """the combo-box view for an entity: same as text out of context view

        by default

        """

        self.wview('textoutofcontext', self.rset, row=row, col=col)

class EditableFinalView(FinalView):

    """same as FinalView but enables inplace-edition when possible"""

    id = 'editable-final'

    def cell_call(self, row, col, props=None, displaytime=False):

        entity, rtype = self.rset.related_entity(row, col)

        if entity is not None:

            self.w(entity.view('reledit', rtype=rtype))

        else:

            super(EditableFinalView, self).cell_call(row, col, props, displaytime)