from import_export.admin import ImportExportModelAdmin
from django.contrib import admin
from django.core.cache import cache
from django.core.paginator import Paginator
from . import models
from . import resources
from dati_geo_app.admin import RicercaOrdinataMixin, AjaxAutocompleteListFilterModelAdmin

# Modified version of a GIST I found in a SO thread
# cfr. http://masnun.rocks/2017/03/20/django-admin-expensive-count-all-queries/
class CachingPaginator(Paginator):
    def _get_count(self):
        if not hasattr(self, "_count"):
            self._count = None
        if self._count is None:
            try:
                key = "adm:{0}:count".format(hash(self.object_list.query.__str__()))
                self._count = cache.get(key, -1)
                if self._count == -1:
                    self._count = super().count
                    cache.set(key, self._count, 60)
            except:
                self._count = len(self.object_list)
        return self._count
    count = property(_get_count)

# # Main reusable Admin class for only viewing
# class ViewAdminMixin(admin.ModelAdmin):
#     def has_add_permission(self, request):
#         return False
#
#     def has_change_permission(self, request, obj=None):
#         return False
#
#     def has_delete_permission(self, request, obj=None):
#         return False

# --------------- FINE PREFISSO TEMPLATE ---------------


@admin.register(models.PersonaContattoAzienda)
class PersonaContattoAziendaAdmin(ImportExportModelAdmin):
    # resource = resources.PersonaContattoAziendaResource
    # list_per_page = 15
    # paginator = CachingPaginator
    # show_full_result_count = False
    pass


@admin.register(models.Telefono)
class TelefonoAdmin(ImportExportModelAdmin):
    # resource = resources.TelefonoResource
    # list_per_page = 15
    # paginator = CachingPaginator
    # show_full_result_count = False
    pass


@admin.register(models.Email)
class EmailAdmin(ImportExportModelAdmin):
    # resource = resources.EmailResource
    # list_per_page = 15
    # paginator = CachingPaginator
    # show_full_result_count = False
    pass


@admin.register(models.PersonaFisica)
class PersonaFisicaAdmin(ImportExportModelAdmin):
    # resource = resources.PersonaFisicaResource
    # list_per_page = 15
    # paginator = CachingPaginator
    # show_full_result_count = False
    pass


@admin.register(models.PersonaGiuridica)
class PersonaGiuridicaAdmin(ImportExportModelAdmin):
    # resource = resources.PersonaGiuridicaResource
    # list_per_page = 15
    # paginator = CachingPaginator
    # show_full_result_count = False
    pass


@admin.register(models.Sede)
class SedeAdmin(ImportExportModelAdmin):
    # resource = resources.SedeResource
    # list_per_page = 15
    # paginator = CachingPaginator
    # show_full_result_count = False
    pass


@admin.register(models.Fax)
class FaxAdmin(ImportExportModelAdmin):
    # resource = resources.FaxResource
    # list_per_page = 15
    # paginator = CachingPaginator
    # show_full_result_count = False
    pass


@admin.register(models.Pec)
class PecAdmin(ImportExportModelAdmin):
    # resource = resources.PecResource
    # list_per_page = 15
    # paginator = CachingPaginator
    # show_full_result_count = False
    pass


@admin.register(models.Indirizzo)
class IndirizzoAdmin(RicercaOrdinataMixin, AjaxAutocompleteListFilterModelAdmin):
    list_per_page = 15
    paginator = CachingPaginator
    show_full_result_count = False
    fields=('dug','duf','civico','cap','comune','altro',)
    search_fields = ('indirizzo','cap_id__exact',)
    autocomplete_fields = ('dug','cap','comune',)
    list_display = ('indirizzo', 'cap','comune','provincia','regione',)
    ordering = ('comune_id','duf','civico',)
    autocomplete_list_filter = ('comune',)
    list_filter = ('comune__provincia__regione_id',)

    def get_queryset(self, request):
        queryset = super().get_queryset(request).select_related('comune__provincia__regione').annotate(indirizzo=Concat('dug_id',Value(' '),'duf',Value(' '),'civico'))
        return queryset

    def provincia(self, obj):
        return obj.comune.provincia
    provincia.short_description = 'Provincia'
    provincia.admin_order_field = 'comune__provincia_id'

    def regione(self, obj):
        return obj.comune.provincia.regione_id
    regione.short_description = 'Regione'
    regione.admin_order_field = 'comune__provincia__regione_id'

    def indirizzo(self, obj):
        return obj.indirizzo
    indirizzo.short_description = 'Indirizzo'
    indirizzo.admin_order_field = ('comune_id','duf','civico',)