from django import forms
from django.contrib import admin
from django.contrib.auth import get_user_model
from django.contrib.auth.admin import UserAdmin
from django.core.urlresolvers import reverse
from django.utils.safestring import mark_safe
from django.utils.translation import ugettext_lazy as _

from orchestra.admin import ExtendedModelAdmin
from orchestra.admin.utils import insertattr, link
from orchestra.apps.accounts.admin import SelectAccountAdminMixin
from orchestra.apps.domains.forms import DomainIterator
from orchestra.apps.users.roles.admin import RoleAdmin

from .forms import MailRoleAdminForm
from .models import Mailbox, Address, Autoresponse


class AutoresponseInline(admin.StackedInline):
    model = Autoresponse
    verbose_name_plural = _("autoresponse")
    
    def formfield_for_dbfield(self, db_field, **kwargs):
        if db_field.name == 'subject':
            kwargs['widget'] = forms.TextInput(attrs={'size':'118'})
        return super(AutoresponseInline, self).formfield_for_dbfield(db_field, **kwargs)


#class AddressAdmin(SelectAccountAdminMixin, ExtendedModelAdmin):
#    list_display = ('email', 'domain_link', 'mailboxes', 'forwards', 'account_link')
#    fields = ('account_link', ('name', 'domain'), 'destination')
#    inlines = [AutoresponseInline]
#    search_fields = ('name', 'domain__name',)
#    readonly_fields = ('account_link', 'domain_link', 'email_link')
#    filter_by_account_fields = ['domain']
#    
#    domain_link = link('domain', order='domain__name')
#    
#    def email_link(self, address):
#        link = self.domain_link(address)
#        return "%s@%s" % (address.name, link)
#    email_link.short_description = _("Email")
#    email_link.allow_tags = True
#    
#    def mailboxes(self, address):
#        boxes = []
#        for mailbox in address.get_mailboxes():
#            user = mailbox.user
#            url = reverse('admin:users_user_mailbox_change', args=(user.pk,))
#            boxes.append('<a href="%s">%s</a>' % (url, user.username))
#        return '<br>'.join(boxes)
#    mailboxes.allow_tags = True
#    
#    def forwards(self, address):
#        values = [ dest for dest in address.destination.split() if '@' in dest ]
#        return '<br>'.join(values)
#    forwards.allow_tags = True
#    
#    def formfield_for_dbfield(self, db_field, **kwargs):
#        if db_field.name == 'destination':
#            kwargs['widget'] = forms.TextInput(attrs={'size':'118'})
#        return super(AddressAdmin, self).formfield_for_dbfield(db_field, **kwargs)
#    
#    def queryset(self, request):
#        """ Select related for performance """
#        qs = super(AddressAdmin, self).queryset(request)
#        # TODO django 1.7 account__user is not needed
#        return qs.select_related('domain', 'account__user')


class AddressAdmin(SelectAccountAdminMixin, ExtendedModelAdmin):
    list_display = (
        'email', 'domain_link', 'display_mailboxes', 'display_forward', 'account_link'
    )
    fields = ('account_link', ('name', 'domain'), 'mailboxes', 'forward')
    inlines = [AutoresponseInline]
    search_fields = ('name', 'domain__name',)
    readonly_fields = ('account_link', 'domain_link', 'email_link')
    filter_by_account_fields = ['domain']
    filter_horizontal = ['mailboxes']
    
    domain_link = link('domain', order='domain__name')
    
    def email_link(self, address):
        link = self.domain_link(address)
        return "%s@%s" % (address.name, link)
    email_link.short_description = _("Email")
    email_link.allow_tags = True
    
    def display_mailboxes(self, address):
        boxes = []
        for mailbox in address.mailboxes():
            user = mailbox.user
            url = reverse('admin:users_user_mailbox_change', args=(user.pk,))
            boxes.append('<a href="%s">%s</a>' % (url, user.username))
        return '<br>'.join(boxes)
    display_mailboxes.short_description = _("Mailboxes")
    display_mailboxes.allow_tags = True
    
    def display_forward(self, address):
        values = [ dest for dest in address.forward.split() ]
        return '<br>'.join(values)
    display_forward.short_description = _("Forward")
    display_forward.allow_tags = True
    
    def formfield_for_dbfield(self, db_field, **kwargs):
        if db_field.name == 'forward':
            kwargs['widget'] = forms.TextInput(attrs={'size':'118'})
        if db_field.name == 'mailboxes':
            mailboxes = db_field.rel.to.objects.select_related('user')
            kwargs['queryset'] = mailboxes.filter(user__account=self.account)
        return super(AddressAdmin, self).formfield_for_dbfield(db_field, **kwargs)
    
    def get_queryset(self, request):
        """ Select related for performance """
        qs = super(AddressAdmin, self).get_queryset(request)
        # TODO django 1.7 account__user is not needed
        return qs.select_related('domain', 'account__user')


class MailRoleAdmin(RoleAdmin):
    model = Mailbox
    name = 'mailbox'
    url_name = 'mailbox'
    form = MailRoleAdminForm


admin.site.register(Address, AddressAdmin)
insertattr(get_user_model(), 'roles', MailRoleAdmin)