from django.core.urlresolvers import reverse
from django.views.generic.list_detail import *
from django.views.generic.create_update import *
from django.conf.urls.defaults import *

'''
    Model based generic views
    Keep all view in View.listView

    Example: get url for Create Connection form in template: {{ view.listView.CreateConnection.getUrl }}
'''

def getPatterns(model):
    list = ('List','Update','Create','Delete')
    urlpatterns = []
    for action in list:
        view = globals()[action+"View"](model, action)
        urlpatterns += patterns('', url(view.urlpattern, view.requestView, name=view.name))
    return urlpatterns

def getUrlByName(name):
    return View.listView[name].getUrl()

def getListUrl(model):
    return getUrlByName('List'+model.__name__)

class View(object):
    listView={}
    def __init__(self, model, action):
        self.model = model
        self.name=action+model.__name__
        self.urlpattern = r'^%s/$' % action.lower()
        self.title="%s %s" % (action, model.__name__)
        self.listView[self.name] = self

    def do(self, *args, **kwargs):
        return None   # Override

    def requestView(self, request, **kwargs):
        return self.do(request, extra_context={'view': self}, **kwargs)

    def getUrl(self):
        if not hasattr(self,'url'):
            self.url=reverse(self.name)
        return self.url

class ListView(View):
    def __init__(self, model, name):
        View.__init__(self, model, name)
        self.queryset= model.objects.all()
        self.title = "%ss list" % model.__name__

    def do(self, request, **kwargs):
        return object_list(request, self.queryset, **kwargs)

class CreateView(View):
    def do(self, request, **kwargs):
        redirect=getListUrl(self.model)
        return create_object(request, model=self.model, post_save_redirect=redirect, **kwargs)

class ObjectView(View):
    def __init__(self, model, name):
        View.__init__(self, model, name)
        self.urlpattern = r'^%s/(?P<object_id>\d+)/$' % name

    def getUrl(self):
        return "Not supported (use object instead)"

class UpdateView(ObjectView):
    def do(self, request, **kwargs):
        return update_object(request, model=self.model, post_save_redirect=getListUrl(self.model), **kwargs)

class DeleteView(ObjectView):
    def do(self, request, **kwargs):
        return delete_object(request, model=self.model, post_delete_redirect=getListUrl(self.model), **kwargs)