# passingkeys.py

import cgi
import os
from google.appengine.ext import db
from google.appengine.ext import webapp
from google.appengine.ext.webapp import template
from google.appengine.ext.webapp.util import run_wsgi_app

class List(db.Model):
  name = db.StringProperty(multiline=True)

class Item(db.Model):
  list_key = db.ReferenceProperty(List)
  name = db.StringProperty(multiline=True)

def render (template_values):

  lists = db.GqlQuery("SELECT * FROM List")

  new_lists = []
  for list in lists:
     items = db.GqlQuery("SELECT * FROM Item Where list_key = :1",list.key())

     new_list = {
        'name': list.name,
        'key': str(list.key()),
        'items': items
     }
     new_lists.append(new_list)
  
  template_values['lists'] = new_lists

  path = os.path.join(os.path.dirname(__file__), 'index.html')
  return(template.render(path, template_values))

class HomePage(webapp.RequestHandler):
  def get(self):
     template_values = {
        'list_form': 0,
        'item_form': 0
     }
     self.response.out.write(render(template_values))

class CreateList(webapp.RequestHandler):
  def get(self):
     template_values = {
        'list_form': 1
     }
     self.response.out.write(render(template_values))

  def post(self):
    list = List()

    list.name = self.request.get('name')
    list.put()

    self.redirect("/")

class CreateItem(webapp.RequestHandler):
  def get(self, list_key):
     template_values = {
        'item_form': 1,
        'list_key': list_key
     }
     self.response.out.write(render(template_values))

  def post(self):
    item = Item()

    list_key = self.request.get('list_key')
    item.list_key =  List.get(list_key)
    item.name = self.request.get('name')
    item.put()

    self.redirect("/")

application = webapp.WSGIApplication(
                                     [('/', HomePage),
                                        ('/list_form/', CreateList),
                                        ('/create_list/', CreateList),
                                        ('/item_form/(.*)/', CreateItem),
                                        ('/create_item/', CreateItem)],
                                     debug=True)

def main():
  run_wsgi_app(application)

if __name__ == "__main__":
  main()