"""Specific views for entities implementing IGeocodable

: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"

import simplejson

from cubicweb.interfaces import IGeocodable

from cubicweb.view import EntityView

from cubicweb.selectors import implements

class GeocodingJsonView(EntityView):

    id = 'geocoding-json'

    binary = True

    templatable = False

    content_type = 'application/json'

    __select__ = implements(IGeocodable)

    def call(self):

        # remove entities that don't define latitude and longitude

        self.rset = self.rset.filtered_rset(lambda e: e.latitude and e.longitude)

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

        extraparams = self.req.form.copy()

        extraparams.pop('vid', None)

        extraparams.pop('rql', None)

        markers = [self.build_marker_data(rowidx, extraparams)

                   for rowidx in xrange(len(self.rset))]

        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(simplejson.dumps(geodata))

    def build_marker_data(self, row, extraparams):

        entity = self.entity(row, 0)

        icon = None

        if hasattr(entity, 'marker_icon'):

            icon = entity.marker_icon()

        else:

            icon = (self.req.external_resource('GMARKER_ICON'), (20, 34), (4, 34), None)

        return {'latitude': entity.latitude, 'longitude': entity.longitude,

                'title': entity.dc_long_title(),

                #icon defines : (icon._url, icon.size,  icon.iconAncho', icon.shadow)

                'icon': icon,

                'bubbleUrl': entity.absolute_url(vid='gmap-bubble', __notemplate=1, **extraparams),

                }

class GoogleMapBubbleView(EntityView):

    id = 'gmap-bubble'

    __select__ = implements(IGeocodable)

    def cell_call(self, row, col):

        entity = self.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):

    id = 'gmap-view'

    __select__ = implements(IGeocodable)

    need_navigation = False

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

        self.req.demote_to_html()

        # remove entities that don't define latitude and longitude

        self.rset = self.rset.filtered_rset(lambda e: e.latitude and e.longitude)

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

                        localfile=False)

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

        rql = self.rset.printable_rql()

        if urlparams is None:

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

        else:

            loadurl = self.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):

    id = 'gmap-legend'

    def call(self):

        self.w(u'<ol>')

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

            self.w(u'<li>')

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

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

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