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

"""

__docformat__ = "restructuredtext en"

_ = unicode

from logilab.common.decorators import cached

from logilab.mtconverter import xml_escape

from cubicweb import typed_eid

from cubicweb.view import EntityView, StartupView

from cubicweb.selectors import (one_line_rset, non_final_entity,

                                match_search_state)

from cubicweb.web import httpcache

from cubicweb.web.views import baseviews, linksearch_select_url

class SearchForAssociationView(EntityView):

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

    something to link to the edited eid

    """

    __regid__ = '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.cw_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.cw_rset.get_entity(0, 0)

        role, eid, rtype, etype = self._cw.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, args = entity.unrelated_rql(rtype, etype, role,

                                         ordermethod='fetch_order',

                                         vocabconstraints=False)

        rset = self._cw.execute(rql, args, tuple(args))

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

class OutOfContextSearch(EntityView):

    __regid__ = 'outofcontext-search'

    def cell_call(self, row, col):

        entity = self.cw_rset.get_entity(row, col)

        erset = entity.as_rset()

        if self._cw.match_search_state(erset):

            self.w(u'<a href="%s" title="%s">%s</a>&#160;<a href="%s" title="%s">[...]</a>' % (

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

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

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

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

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

        else:

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

class ComboboxView(EntityView):

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

    THIS IS A TEXT VIEW. DO NOT HTML_ESCAPE

    """

    __regid__ = '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.cw_rset, row=row, col=col)

class EditableFinalView(baseviews.FinalView):

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

    __regid__ = 'editable-final'

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

        entity, rtype = self.cw_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)

try:

    from cubicweb.web import captcha

except ImportError:

    # PIL not installed

    pass

else:

    class CaptchaView(StartupView):

        __regid__ = 'captcha'

        http_cache_manager = httpcache.NoHTTPCacheManager

        binary = True

        templatable = False

        content_type = 'image/jpg'

        def call(self):

            text, data = captcha.captcha(self._cw.vreg.config['captcha-font-file'],

                                         self._cw.vreg.config['captcha-font-size'])

            key = self._cw.form.get('captchakey', 'captcha')

            self._cw.set_session_data(key, text)

            self.w(data.read())