from django.shortcuts import render
from django.utils.translation import ugettext as _
from django.views.generic.edit import FormView
from django.core.urlresolvers import reverse
from django import forms
from django.core.exceptions import PermissionDenied

from ajax_select.fields import AutoCompleteSelectField

from core.models import User
from subscription.models import Subscriber
from counter.models import Customer

def merge_users(u1, u2):
    u1.nick_name = u1.nick_name or u2.nick_name
    u1.date_of_birth = u1.date_of_birth or u2.date_of_birth
    u1.home = u1.home or u2.home
    u1.sex = u1.sex or u2.sex
    u1.tshirt_size = u1.tshirt_size or u2.tshirt_size
    u1.role = u1.role or u2.role
    u1.department = u1.department or u2.department
    u1.dpt_option = u1.dpt_option or u2.dpt_option
    u1.semester = u1.semester or u2.semester
    u1.quote = u1.quote or u2.quote
    u1.school = u1.school or u2.school
    u1.promo = u1.promo or u2.promo
    u1.forum_signature = u1.forum_signature or u2.forum_signature
    u1.second_email = u1.second_email or u2.second_email
    u1.phone = u1.phone or u2.phone
    u1.parent_phone = u1.parent_phone or u2.parent_phone
    u1.address = u1.address or u2.address
    u1.parent_address = u1.parent_address or u2.parent_address
    u1.save()
    for u in u2.godfathers.all():
        u1.godfathers.add(u)
    u1.save()
    for i in u2.invoices.all():
        for f in i._meta.local_fields: # I have sadly not found anything better :/
            if f.name == "date":
                f.auto_now = False
        u1.invoices.add(i)
    u1.save()
    s1 = Subscriber.objects.filter(id=u1.id).first()
    s2 = Subscriber.objects.filter(id=u2.id).first()
    for s in s2.subscriptions.all():
        s1.subscriptions.add(s)
    s1.save()
    c1 = Customer.objects.filter(user__id=u1.id).first()
    c2 = Customer.objects.filter(user__id=u2.id).first()
    if c1 and c2:
        for r in c2.refillings.all():
            c1.refillings.add(r)
        c1.save()
        for s in c2.buyings.all():
            c1.buyings.add(s)
        c1.save()
    elif c2 and not c1:
        c2.user = u1
        c1 = c2
        c1.save()
    c1.recompute_amount()
    u2.delete()
    return u1

class MergeForm(forms.Form):
    user1 = AutoCompleteSelectField('users', label=_("User that will be kept"), help_text=None, required=True)
    user2 = AutoCompleteSelectField('users', label=_("User that will be deleted"), help_text=None, required=True)

class MergeUsersView(FormView):
    template_name = "rootplace/merge.jinja"
    form_class = MergeForm

    def dispatch(self, request, *arg, **kwargs):
        res = super(MergeUsersView, self).dispatch(request, *arg, **kwargs)
        if request.user.is_root:
            return res
        raise PermissionDenied

    def form_valid(self, form):
        self.final_user = merge_users(form.cleaned_data['user1'], form.cleaned_data['user2'])
        return super(MergeUsersView, self).form_valid(form)

    def get_success_url(self):
        return reverse('core:user_profile', kwargs={'user_id': self.final_user.id})