import urlparse

from django.db import models
from django.utils.http import urlencode
from django.contrib.auth.models import AnonymousUser
        
from dynamic_search.conf.settings import RECENT_COUNT


class RecentSearchManager(models.Manager):
    def add_query_for_user(self, user, query, hits):
        parsed_query = urlparse.parse_qs(urlencode(dict(query.items())))
        
        for key, value in parsed_query.items():
            parsed_query[key] = ' '.join(value)

        if 'q=' in query:
            # Is a simple query
            if not parsed_query.get('q'):
                # Don't store empty simple searches
                return
            else:
                # Cleanup query string and only store the q parameter
                parsed_query = {'q': parsed_query['q']}

        if parsed_query and not isinstance(user, AnonymousUser):
            # If the URL query has at least one variable with a value
            new_recent, created = self.model.objects.get_or_create(user=user, query=urlencode(parsed_query), defaults={'hits': hits})
            if not created:
                new_recent.hits = hits
                new_recent.save()

            for recent_to_delete in self.model.objects.filter(user=user)[RECENT_COUNT:]:
                recent_to_delete.delete()