#!/usr/bin/env python
# -*- coding: utf-8 -*-
# Copyright (C) 2010 Pierre Clarenc <pierre.crc_AT_gmailDOTcom>,
#                    Samuel Renard <renard.samuel_AT_gmailDOTcom>,
#                    Étienne Loks <etienne.loks_AT_peacefrogsDOTnet>

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.

# This program 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 General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# See the file COPYING for details.

from django.contrib.syndication.feeds import Feed
from django.contrib.syndication.feeds import FeedDoesNotExist
from chimere.main.models import Category, SubCategory, Marker, Area
from django.core.exceptions import ObjectDoesNotExist
from django.contrib.gis.geos import *

from chimere import settings


class LatestPOIsByCategory(Feed):
    '''
    Last Points of interests by category in Feeds
    '''
    
    title_template = "rss_title.html"
    description_template = "rss_descr.html"
    # Get extra url, after rss/category/ -> bits[0]=id of category
    def get_object(self, bits):
        if len(bits) != 1:
            raise ObjectDoesNotExist
        return Category.objects.get(id__exact=bits[0])
    # Define the title of the feed, here The name of the category
    def title(self, obj):
        return "Chimere - %s" % obj.name
    # Define the link of the feed. Feeds agregators update at this link
    def link(self, obj):
        if not obj:
            raise FeedDoesNotExist
        return settings.BASE_URL + 'rss/category/' + str(obj.id)
    # Description of the feed
    def description(self, obj):
        return obj.description
    # Link of the item/POI. Here the link is the permalink of the marker/POI
    def item_link(self, item):
        # Return the permalink of the POI :
        # Get thirst the attribute point of the marker
        # Then we had to transform this to the good system metric. From srid=4326 to srid=900913
        coord = item.point
        coord.transform(settings.EPSG_PROJECTION)
        return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'            
    # Date of the Marker when it has been available
    def item_pubdate(self,item):
            return item.avail_date
    # Requests to marker where its category match the category is requested AND its status is available
    # This returns a list of the 15 last markers/POIs ordering by date 
    def items(self, obj):
        return Marker.objects.filter(subcategory__category__id__exact=obj.id, status__exact='A').order_by('-avail_date')[:15]

class LatestPOIsBySubCategory(Feed):
    '''
    Last Points of interests by SubCategory in Feeds
    '''
    title_template = "rss_title.html"
        description_template = "rss_descr.html"
        
    def get_object(self, bits):
        if len(bits) != 1:
            raise ObjectDoesNotExist
        return SubCategory.objects.get(id__exact=bits[0])

    def title(self, obj):
        return obj.category.name + "Chimere - %s" % obj.name

    def link(self, obj):
        if not obj:
            raise FeedDoesNotExist
        return settings.BASE_URL + 'rss/subcategory/' + str(obj.id)

    def description(self, obj):
        return ""

    def item_link(self, item):
        # Renvoyer le permalink du POI :
        coord = item.point
        coord.transform(settings.EPSG_PROJECTION)
        return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'

    def item_pubdate(self,item):
            return item.avail_date

    def items(self, obj):
        return Marker.objects.filter(subcategory__id__exact=obj.id, status__exact='A').order_by('-avail_date')[:15]

class LatestPOIs(Feed):
    '''
    Last Points of interests
    '''
    title_template = "rss_title.html"
        description_template = "rss_descr.html"

    def title(self):
        return "Chimere - Last POIs"

    def link(self):
        return settings.BASE_URL + 'rss/categories/'

    def description(self):
        return "Latest POIs from Chimere"

    def item_link(self, item):
        # Renvoyer le permalink du POI :
        coord = item.point
        coord.transform(settings.EPSG_PROJECTION)
        return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'

    def item_pubdate(self,item):
            return item.avail_date

    def items(self):
        return Marker.objects.filter(status__exact='A').order_by('-avail_date')[:15]


class LatestPOIsByZone(Feed):
    '''
    Last Points of interests by zone by coordinates
    '''
    title_template = "rss_title.html"
    description_template = "rss_descr.html"
    # Attributes which store coordinates of the requested zone 
    upper_left_lat = 0
    upper_left_lon = 0
    lower_right_lat = 0
    lower_right_lon = 0

    def get_object(self, bits):
        if len(bits) != 1:
            raise ObjectDoesNotExist
        # Get the extra url. Parameters are the coordinates of the zone (the upper left and lower right points)
        # Then define the upper right and lower left points
        coordinates = str(bits[0]).split(',')
        upper_left_lat = float(coordinates[0])
        upper_left_lon = float(coordinates[1])
        lower_right_lat = float(coordinates[2])
        lower_right_lon = float(coordinates[3])
        
        upper_right_lat = upper_left_lat
        upper_right_lon = lower_right_lon
        lower_left_lat = lower_right_lat
        lower_left_lon = upper_left_lon
        # Define a Polygon with the 4 points of the zone.
        # Cordinates are define with a srid=900913, use by google, yahoo but no OpenStreeMap
        areaBox = Polygon(((upper_left_lon, upper_left_lat), 
                            (upper_right_lon, upper_right_lat), 
                            (lower_right_lon, lower_right_lat),
                            (lower_left_lon, lower_left_lat),
                            (upper_left_lon, upper_left_lat)),
                            srid=settings.EPSG_PROJECTION)
        # OSM uses the standard srid=4326, wich uses the real pairs latitude/longitude in degrees.
        areaBox.transform(settings.EPSG_DISPLAY_PROJECTION)

        return areaBox
    
    def title(self, obj):
        return "Chimere - Last POIs by area"
    # Define the link of the feed. It's the same url as we get in the method get_object
    def link(self, obj):
        if not obj:
            raise FeedDoesNotExist
        return settings.BASE_URL + 'rss/area/' + str(self.upper_left_lat) + ',' + str(self.upper_left_lon) + ',' + str(self.lower_right_lat) + ',' + str(self.lower_right_lon)

    def description(self, obj):
        return ""
    
    # Link of the item/POI. Here the link is the permalink of the marker/POI
    def item_link(self, item):
        # Return the permalink of the POI :
        # Get thirst the attribute point of the marker
        # Then we had to transform this to the good system metric. From srid=4326 to srid=900913
        coord = item.point
        coord.transform(settings.EPSG_PROJECTION)
        return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'
    # Return the date of the Marker
    def item_pubdate(self,item):
        return item.avail_date
    # Request to return Markers WHERE there points are containes in the zone which is requested.
    # This returns a list of the 15 last markers/POIs ordering by date 
    def items(self, obj):
            return Marker.objects.filter(point__contained=obj, status__exact='A').order_by('-avail_date')[:15]

class LatestPOIsByZoneID(Feed):
    '''
    Last Points of interests by zone by id
    '''
    title_template = "rss_title.html"
    description_template = "rss_descr.html"
        
    def get_object(self, bits):
        if len(bits) != 1:
            raise ObjectDoesNotExist
        
        return Area.objects.get(id__exact=bits[0])

    def title(self, obj):
        return "Chimere - Last POIs of %s" % obj.name

    def link(self, obj):
        if not obj:
            raise FeedDoesNotExist
        return settings.BASE_URL + 'rss/areaid/' + str(obj.id)

    def description(self, obj):
        return ""

    def item_link(self, item):
            coord = item.point
            coord.transform(settings.EPSG_PROJECTION)
        return settings.BASE_URL + '?zoom=16&lat=' + str(coord.y) + '&lon=' + str(coord.x) + '&layers=BTT&checked_categories=1&display_submited=false'

    def item_pubdate(self,item):
        return item.avail_date

    def items(self, obj):
            upper_left_lat = float(obj.upper_left_corner.x)
        upper_left_lon = float(obj.upper_left_corner.y)
        lower_right_lat = float(obj.lower_right_corner.x)
        lower_right_lon = float(obj.lower_right_corner.y)
            
        upper_right_lat = upper_left_lat
        upper_right_lon = lower_right_lon
        lower_left_lat = lower_right_lat
        lower_left_lon = upper_left_lon
        
            areaBox = Polygon(((upper_left_lon, upper_left_lat), 
                            (upper_right_lon, upper_right_lat), 
                            (lower_right_lon, lower_right_lat),
                            (lower_left_lon, lower_left_lat),
                            (upper_left_lon, upper_left_lat)),
                            srid=settings.EPSG_PROJECTION)
                            
            areaBox.transform(settings.EPSG_DISPLAY_PROJECTION)

            return Marker.objects.filter(point__contained=areaBox)