# -*- coding: utf-8 -*-
# vi:si:et:sw=4:sts=4:ts=4
import os
from datetime import datetime

from django.contrib.auth.models import User
from django.db import models
from django.db.models import Max
from django.conf import settings

from ox.utils import json
from ox.django.fields import DictField

from app.models import site_config
from itemlist.models import List, Position


class UserProfile(models.Model):
    reset_token = models.TextField(blank=True, null=True, unique=True)
    user = models.ForeignKey(User, unique=True)

    files_updated = models.DateTimeField(default=datetime.now)
    newsletter = models.BooleanField(default=True)
    ui = DictField(default={})
    preferences = DictField(default={})

    def get_preferences(self):
        prefs = self.preferences
        prefs['email'] = self.user.email
        return prefs

    def get_ui(self):
        ui = {}
        config = site_config()
        ui.update(config['user']['ui'])
        def updateUI(ui, new):
            '''
                only update set keys in dicts
            '''
            for key in new:
                if isinstance(new[key], dict) and key in ui:
                    ui[key] = updateUI(ui[key], new[key])
                else:
                    ui[key] = new[key]
            return ui
        ui = updateUI(ui, self.ui)
        if not 'lists' in ui:
            ui['lists'] = {}
            ui['lists'][''] = config['uiDefaults']['list']

        def add(lists, section):
            ids = []
            for l in lists:
                qs = Position.objects.filter(section=section)
                if section == 'featured':
                    try:
                        pos = Position.objects.get(list=l, section=section)
                        created = False
                    except Position.DoesNotExist:
                        pos = Position(list=l, section=section, user=self.user)
                        pos.save()
                        created = True 
                else:
                    pos, created = Position.objects.get_or_create(list=l, user=self.user, section=section)
                    qs = qs.filter(user=self.user)
                if created:
                    pos.position = qs.aggregate(Max('position'))['position__max'] + 1
                    pos.save()
                id = l.get_id()
                '''
                if id not in ui['lists']:
                    ui['lists'][id] = {}
                    ui['lists'][id].update(ui['lists'][''])
                '''
                ids.append(id)
            return ids

        ids = ['']
        ids += add(self.user.lists.exclude(status="featured"), 'personal')
        ids += add(self.user.subscribed_lists.filter(status='public'), 'public')
        ids += add(List.objects.filter(status='featured'), 'featured')
        for i in ui['lists'].keys():
            if i not in ids:
                del ui['lists'][i]
        return ui

def user_post_save(sender, instance, **kwargs):
    profile, new = UserProfile.objects.get_or_create(user=instance)

models.signals.post_save.connect(user_post_save, sender=User)


def get_user_json(user):
    profile = user.get_profile()
    result = {}
    for key in ('username', ):
        result[key] = getattr(user, key)
    result['admin'] = user.is_staff
    result['groups'] = [g.name for g in user.groups.all()]
    result['preferences'] = profile.get_preferences()
    result['ui'] = profile.get_ui()
    return result