# copyright 2003-2011 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/>.

"""Specific views for entities implementing IGeocodable"""

__docformat__ = "restructuredtext en"

from cubicweb.interfaces import IGeocodable

from cubicweb.view import EntityView, EntityAdapter, implements_adapter_compat

from cubicweb.selectors import implements, adaptable

from cubicweb.utils import json_dumps

class IGeocodableAdapter(EntityAdapter):

    """interface required by geocoding views such as gmap-view"""

    __needs_bw_compat__ = True

    __regid__ = 'IGeocodable'

    __select__ = implements(IGeocodable, warn=False) # XXX for bw compat, should be abstract

    @property

    @implements_adapter_compat('IGeocodable')

    def latitude(self):

        """returns the latitude of the entity in degree (-90 < float < +90)"""

        raise NotImplementedError

    @property

    @implements_adapter_compat('IGeocodable')

    def longitude(self):

        """returns the longitude of the entity in degree (-180 < float < +180)"""

        raise NotImplementedError

    @implements_adapter_compat('IGeocodable')

    def marker_icon(self):

        """returns the icon that should be used as the marker.

        an icon is defined by a 4-uple:

          (icon._url, icon.size,  icon.iconAnchor, icon.shadow)

        """

        return (self._cw.uiprops['GMARKER_ICON'], (20, 34), (4, 34), None)

class GeocodingJsonView(EntityView):

    __regid__ = 'geocoding-json'

    __select__ = adaptable('IGeocodable')

    binary = True

    templatable = False

    content_type = 'application/json'

    def call(self):

        zoomlevel = self._cw.form.pop('zoomlevel', 8)

        extraparams = self._cw.form.copy()

        extraparams.pop('vid', None)

        extraparams.pop('rql', None)

        markers = []

        for entity in self.cw_rset.entities():

            igeocodable = entity.cw_adapt_to('IGeocodable')

            # remove entities that don't define latitude and longitude

            if not (igeocodable.latitude and igeocodable.longitude):

                continue

            markers.append(self.build_marker_data(entity, igeocodable,

                                                  extraparams))

        center = {

            'latitude': sum(marker['latitude'] for marker in markers) / len(markers),

            'longitude': sum(marker['longitude'] for marker in markers) / len(markers),

            }

        geodata = {

            'zoomlevel': int(zoomlevel),

            'center': center,

            'markers': markers,

            }

        self.w(json_dumps(geodata))

    def build_marker_data(self, entity, igeocodable, extraparams):

        return {'latitude': igeocodable.latitude,

                'longitude': igeocodable.longitude,

                'icon': igeocodable.marker_icon(),

                'title': entity.dc_long_title(),

                'bubbleUrl': entity.absolute_url(

                    vid='gmap-bubble', __notemplate=1, **extraparams),

                }

class GoogleMapBubbleView(EntityView):

    __regid__ = 'gmap-bubble'

    __select__ = adaptable('IGeocodable')

    def cell_call(self, row, col):

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

        self.w(u'<div>%s</div>' % entity.view('oneline'))

        # FIXME: we should call something like address-view if available

class GoogleMapsView(EntityView):

    __regid__ = 'gmap-view'

    __select__ = adaptable('IGeocodable')

    paginable = False

    def call(self, gmap_key, width=400, height=400, uselabel=True, urlparams=None):

        self._cw.demote_to_html()

        self._cw.add_js('http://maps.google.com/maps?sensor=false&file=api&v=2&key=%s'

                        % gmap_key, localfile=False)

        self._cw.add_js( ('cubicweb.widgets.js', 'cubicweb.gmap.js', 'gmap.utility.labeledmarker.js') )

        rql = self.cw_rset.printable_rql()

        if urlparams is None:

            loadurl = self._cw.build_url(rql=rql, vid='geocoding-json')

        else:

            loadurl = self._cw.build_url(rql=rql, vid='geocoding-json', **urlparams)

        self.w(u'<div style="width: %spx; height: %spx;" class="widget gmap" '

               u'cubicweb:wdgtype="GMapWidget" cubicweb:loadtype="auto" '

               u'cubicweb:loadurl="%s" cubicweb:uselabel="%s"> </div>'

               % (width, height, loadurl, uselabel))

class GoogeMapsLegend(EntityView):

    __regid__ = 'gmap-legend'

    def call(self):

        self.w(u'<ol>')

        for rowidx in xrange(len(self.cw_rset)):

            self.w(u'<li>')

            self.wview('listitem', self.cw_rset, row=rowidx, col=0)

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

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