# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.

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

#

# This file is part of CubicWeb.

#

# CubicWeb is free software: you can redistribute it and/or modify it under the

# terms of the GNU Lesser General Public License as published by the Free

# Software Foundation, either version 2.1 of the License, or (at your option)

# any later version.

#

# CubicWeb 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 Lesser General Public License for more

# details.

#

# You should have received a copy of the GNU Lesser General Public License along

# with CubicWeb.  If not, see <http://www.gnu.org/licenses/>.

"""Set of HTML generic base views:

* noresult, final

* primary, sidebox

* oneline, incontext, outofcontext, text

* list

"""

__docformat__ = "restructuredtext en"

_ = unicode

from datetime import timedelta

from warnings import warn

from rql import nodes

from logilab.mtconverter import TransformError, xml_escape, xml_escape

from cubicweb import NoSelectableObject

from cubicweb.selectors import yes, empty_rset, one_etype_rset

from cubicweb.schema import display_name

from cubicweb.view import EntityView, AnyRsetView, View

from cubicweb.uilib import cut, printable_value

class NullView(AnyRsetView):

    """default view when no result has been found"""

    __regid__ = 'null'

    __select__ = yes()

    def call(self, **kwargs):

        pass

    cell_call = call

class NoResultView(View):

    """default view when no result has been found"""

    __select__ = empty_rset()

    __regid__ = 'noresult'

    def call(self, **kwargs):

        self.w(u'<div class="searchMessage"><strong>%s</strong></div>\n'

               % self._cw._('No result matching query'))

class FinalView(AnyRsetView):

    """display values without any transformation (i.e. get a number for

    entities)

    """

    __regid__ = 'final'

    # record generated i18n catalog messages

    _('%d years')

    _('%d months')

    _('%d weeks')

    _('%d days')

    _('%d hours')

    _('%d minutes')

    _('%d seconds')

    _('%d years')

    _('%d months')

    _('%d weeks')

    _('%d days')

    _('%d hours')

    _('%d minutes')

    _('%d seconds')

    def cell_call(self, row, col, props=None, format='text/html'):

        etype = self.cw_rset.description[row][col]

        value = self.cw_rset.rows[row][col]

        if value is None:

            self.w(u'')

            return

        if etype == 'String':

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

            if entity is not None:

                # yes !

                self.w(entity.printable_value(rtype, value, format=format))

                return

        elif etype in ('Time', 'Interval'):

            if etype == 'Interval' and isinstance(value, (int, long)):

                # `date - date`, unlike `datetime - datetime` gives an int

                # (number of days), not a timedelta

                # XXX should rql be fixed to return Int instead of Interval in

                #     that case? that would be probably the proper fix but we

                #     loose information on the way...

                value = timedelta(days=value)

            # value is DateTimeDelta but we have no idea about what is the

            # reference date here, so we can only approximate years and months

            if format == 'text/html':

                space = ' '

            else:

                space = ' '

            if value.days > 730: # 2 years

                self.w(self._cw.__('%%d%syears' % space) % (value.days // 365))

            elif value.days > 60: # 2 months

                self.w(self._cw.__('%%d%smonths' % space) % (value.days // 30))

            elif value.days > 14: # 2 weeks

                self.w(self._cw.__('%%d%sweeks' % space) % (value.days // 7))

            elif value.days > 2:

                self.w(self._cw.__('%%d%sdays' % space) % int(value.days))

            elif value.seconds > 3600:

                self.w(self._cw.__('%%d%shours' % space) % int(value.seconds // 3600))

            elif value.seconds >= 120:

                self.w(self._cw.__('%%d%sminutes' % space) % int(value.seconds // 60))

            else:

                self.w(self._cw.__('%%d%sseconds' % space) % int(value.seconds))

            return

        self.wdata(printable_value(self._cw, etype, value, props))

# XXX deprecated

class SecondaryView(EntityView):

    __regid__ = 'secondary'

    title = _('secondary')

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

        """the secondary view for an entity

        secondary = icon + view(oneline)

        """

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

        self.w(u' ')

        self.wview('oneline', self.cw_rset, row=row, col=col)

class OneLineView(EntityView):

    __regid__ = 'oneline'

    title = _('oneline')

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

        """the one line view for an entity: linked text view

        """

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

        self.w(u'<a href="%s">' % xml_escape(entity.absolute_url()))

        self.w(xml_escape(self._cw.view('text', self.cw_rset, row=row, col=col)))

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

class TextView(EntityView):

    """the simplest text view for an entity"""

    __regid__ = 'text'

    title = _('text')

    content_type = 'text/plain'

    def call(self, **kwargs):

        """the view is called for an entire result set, by default loop

        other rows of the result set and call the same view on the

        particular row

        Views applicable on None result sets have to override this method

        """

        rset = self.cw_rset

        if rset is None:

            raise NotImplementedError, self

        for i in xrange(len(rset)):

            self.wview(self.__regid__, rset, row=i, **kwargs)

            if len(rset) > 1:

                self.w(u"\n")

    def cell_call(self, row, col=0, **kwargs):

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

        self.w(cut(entity.dc_title(),

                   self._cw.property_value('navigation.short-line-size')))

class MetaDataView(EntityView):

    """paragraph view of some metadata"""

    __regid__ = 'metadata'

    show_eid = True

    def cell_call(self, row, col):

        _ = self._cw._

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

        self.w(u'<div class="metadata">')

        if self.show_eid:

            self.w(u'%s #%s - ' % (entity.dc_type(), entity.eid))

        if entity.modification_date != entity.creation_date:

            self.w(u'<span>%s</span> ' % _('latest update on'))

            self.w(u'<span class="value">%s</span>, '

                   % self._cw.format_date(entity.modification_date))

        # entities from external source may not have a creation date (eg ldap)

        if entity.creation_date:

            self.w(u'<span>%s</span> ' % _('created on'))

            self.w(u'<span class="value">%s</span>'

                   % self._cw.format_date(entity.creation_date))

        if entity.creator:

            self.w(u' <span>%s</span> ' % _('by'))

            self.w(u'<span class="value">%s</span>' % entity.creator.name())

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

class InContextTextView(TextView):

    __regid__ = 'textincontext'

    title = None # not listed as a possible view

    def cell_call(self, row, col):

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

        self.w(entity.dc_title())

class OutOfContextTextView(InContextTextView):

    __regid__ = 'textoutofcontext'

    def cell_call(self, row, col):

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

        self.w(entity.dc_long_title())

class InContextView(EntityView):

    __regid__ = 'incontext'

    def cell_call(self, row, col):

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

        desc = cut(entity.dc_description(), 50)

        self.w(u'<a href="%s" title="%s">' % (

            xml_escape(entity.absolute_url()), xml_escape(desc)))

        self.w(xml_escape(self._cw.view('textincontext', self.cw_rset,

                                        row=row, col=col)))

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

class OutOfContextView(EntityView):

    __regid__ = 'outofcontext'

    def cell_call(self, row, col):

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

        desc = cut(entity.dc_description(), 50)

        self.w(u'<a href="%s" title="%s">' % (

            xml_escape(entity.absolute_url()), xml_escape(desc)))

        self.w(xml_escape(self._cw.view('textoutofcontext', self.cw_rset,

                                        row=row, col=col)))

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

# list views ##################################################################

class ListView(EntityView):

    __regid__ = 'list'

    title = _('list')

    item_vid = 'listitem'

    def call(self, klass=None, title=None, subvid=None, listid=None, **kwargs):

        """display a list of entities by calling their <item_vid> view

        :param listid: the DOM id to use for the root element

        """

        # XXX much of the behaviour here should probably be outside this view

        if subvid is None and 'subvid' in self._cw.form:

            subvid = self._cw.form.pop('subvid') # consume it

        if listid:

            listid = u' id="%s"' % listid

        else:

            listid = u''

        if title:

            self.w(u'<div%s class="%s"><h4>%s</h4>\n' % (listid, klass or 'section', title))

            self.w(u'<ul>\n')

        else:

            self.w(u'<ul%s class="%s">\n' % (listid, klass or 'section'))

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

            self.cell_call(row=i, col=0, vid=subvid, **kwargs)

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

        if title:

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

    def cell_call(self, row, col=0, vid=None, **kwargs):

        self.w(u'<li>')

        self.wview(self.item_vid, self.cw_rset, row=row, col=col, vid=vid, **kwargs)

        self.w(u'</li>\n')

class ListItemView(EntityView):

    __regid__ = 'listitem'

    @property

    def redirect_vid(self):

        if self._cw.search_state[0] == 'normal':

            return 'outofcontext'

        return 'outofcontext-search'

    def cell_call(self, row, col, vid=None, **kwargs):

        if not vid:

            vid = self.redirect_vid

        try:

            self.wview(vid, self.cw_rset, row=row, col=col, **kwargs)

        except NoSelectableObject:

            if vid == self.redirect_vid:

                raise

            self.wview(self.redirect_vid, self.cw_rset, row=row, col=col, **kwargs)

class SimpleListView(ListItemView):

    """list without bullets"""

    __regid__ = 'simplelist'

    redirect_vid = 'incontext'

    def call(self, subvid=None, **kwargs):

        """display a list of entities by calling their <item_vid> view

        :param listid: the DOM id to use for the root element

        """

        if subvid is None and 'vid' in kwargs:

            warn("should give a 'subvid' argument instead of 'vid'",

                 DeprecationWarning, stacklevel=2)

        else:

            kwargs['vid'] = subvid

        return super(SimpleListView, self).call(**kwargs)

class SameETypeListView(EntityView):

    """list of entities of the same type, when asked explicitly for same etype list

    view (for instance, display gallery if only images)

    """

    __regid__ = 'sameetypelist'

    __select__ = EntityView.__select__ & one_etype_rset()

    item_vid = 'sameetypelistitem'

    @property

    def title(self):

        etype = iter(self.cw_rset.column_types(0)).next()

        return display_name(self._cw, etype, form='plural')

    def call(self, **kwargs):

        """display a list of entities by calling their <item_vid> view"""

        showtitle = kwargs.pop('showtitle', not 'vtitle' in self._cw.form)

        if showtitle:

            self.w(u'<h1>%s</h1>' % self.title)

        super(SameETypeListView, self).call(**kwargs)

    def cell_call(self, row, col=0, **kwargs):

        self.wview(self.item_vid, self.cw_rset, row=row, col=col, **kwargs)

class SameETypeListItemView(EntityView):

    __regid__ = 'sameetypelistitem'

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

        self.wview('listitem', self.cw_rset, row=row, col=col, **kwargs)

class CSVView(SimpleListView):

    __regid__ = 'csv'

    redirect_vid = 'incontext'

    def call(self, subvid=None, **kwargs):

        if subvid is None and 'vid' in kwargs:

            warn("should give a 'subvid' argument instead of 'vid'",

                 DeprecationWarning, stacklevel=2)

        else: