#!/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.

"""
Views of the project
"""

from django.shortcuts import render_to_response
from django.http import HttpResponseRedirect

from chimere import settings
from chimere.main.views import get_base_response
from chimere.main.actions import actions
from chimere.main.models import SubCategory,Area
from chimere.main.forms import AreaForm
from chimere.main.widgets import AreaWidget

def rss(request, area_name=''):
    '''
    Redirect to RSS subscription page
    '''
    response_dct = get_base_response()
    response_dct.update({'actions':actions, 'action_selected':('rss',),
                         'category_rss_feed':'',})
    # If the form has been submited
    if request.method == "POST":
        # User has defined the kind of POI he is interested in : POI in a area
        # (GET method is used for the link with RSS icon in the browser)
        if 'rss_category' in request.POST:
            #User wants to follow all the new POI
            if request.POST['rss_category'] == 'global':
                feeds_link = '/' + settings.EXTRA_URL + 'rss/global/'
                return HttpResponseRedirect(feeds_link)
            # User wants to follow all the new POI by category or subcategory
            elif request.POST['rss_category'] == 'poi':
                response_dct['category_rss_feed'] = 'category'
                response_dct['sub_categories'] = SubCategory.getAvailable(['M',
                                                                           'B'])
                return render_to_response('rss.html', response_dct)
            # User wants to follow all the new POI situated in a defined area
            elif request.POST['rss_category'] == 'area':
                # An unbound form
                form = AreaForm()
                area_widget = AreaWidget().render('area', None)
                response_dct.update({'map_layer':settings.MAP_LAYER,
                                     'extra_head':form.media,
                                     'form':form,
                                     'category_rss_feed':'area',
                                     'area_id':Area.getAvailable(),
                                     'area_widget':area_widget
                })
                return render_to_response('rss.html', response_dct)
            # Error when submitting the form
            else:
                error = _("Incorrect choice in the list")
                response_dct.update({'error_message':error,
                    'category_rss_feed':'category',
                    'sub_categories':SubCategory.getAvailable(['M', 'B'])})
                return render_to_response('rss.html', response_dct)

        # User has specified the category or subcategory he wants to follow =>
        # we redirect him towards the related rss feed
        if 'subcategory' in request.POST and request.POST['subcategory'] != '':
            idCat =  request.POST['subcategory']
            if idCat.find("cat_") != -1 :
                list_Cat = idCat.split('_')
                feeds_link = '/' + settings.EXTRA_URL + 'rss/category/'
                feeds_link += list_Cat[1]
                return HttpResponseRedirect(feeds_link)

            else:
                feeds_link = '/' + settings.EXTRA_URL + 'rss/subcategory/' + \
                                                                           idCat
                return HttpResponseRedirect(feeds_link)

        # User has specified the ID of the area he wants to follow
        if 'id_area' in request.POST and request.POST['id_area'] != '':
            feeds_link = '/' + settings.EXTRA_URL + 'rss/areaid/' \
                         + request.POST['id_area']
            return HttpResponseRedirect(feeds_link)

        # User has specified the area  he wants to follow => we redirect him
        # towards the related rss feed (using upper left and lower right
        # coordinates)
        elif 'upper_left_lat' in request.POST and \
             request.POST['upper_left_lat'] != '' and \
             'upper_left_lon' in request.POST and \
             request.POST['upper_left_lon'] != '' and \
             'lower_right_lon' in request.POST and \
             request.POST['lower_right_lon'] != '' and \
             'lower_right_lat' in request.POST and \
             request.POST['lower_right_lat'] != '' :
            feeds_link = '/' + settings.EXTRA_URL + 'rss/area/' + \
request.POST['upper_left_lat'] + '_' + request.POST['upper_left_lon'] + '_' + \
request.POST['lower_right_lat'] + '_' + request.POST['lower_right_lon']
            return HttpResponseRedirect(feeds_link)


    # GET method is used for linking with the RSS icon in the browser when user
    # wants to choose a category to follow
    elif request.method == "GET" and 'rss_category' in request.GET:
        if request.GET['rss_category'] == 'global':
            feeds_link = '/' + settings.EXTRA_URL + 'rss/global/'
            return HttpResponseRedirect(feeds_link)
        if request.GET['rss_category'] == 'poi':
            response_dct['category_rss_feed'] = 'category'
            response_dct['sub_categories'] = SubCategory.getAvailable(['M','B'])
            return render_to_response('rss.html', response_dct)
        if request.GET['rss_category'] == 'area':
            # An unbound form
            form = AreaForm()
            response_dct.update({'map_layer':settings.MAP_LAYER,
                            'extra_head':form.media,
                            'form':form,
                            'category_rss_feed':'area',
                            'area_id':Area.getAvailable(),
                            'area_widget':AreaWidget().render('area', None)})
            return render_to_response('rss.html', response_dct)

    # User access to the RSS tab
    else:
        return render_to_response('rss.html', response_dct)