from datetime import timedelta
from custommail.shortcuts import send_mass_custom_mail

from django.contrib import admin
from django.db.models import Sum, Count
from django.template.defaultfilters import pluralize
from django.utils import timezone
from django import forms

from dal.autocomplete import ModelSelect2

from bda.models import Spectacle, Salle, Participant, ChoixSpectacle,\
    Attribution, Tirage, Quote, CategorieSpectacle, SpectacleRevente


class ReadOnlyMixin(object):
    readonly_fields_update = ()

    def get_readonly_fields(self, request, obj=None):
        readonly_fields = super().get_readonly_fields(request, obj)
        if obj is None:
            return readonly_fields
        else:
            return readonly_fields + self.readonly_fields_update


class ChoixSpectacleAdminForm(forms.ModelForm):
    class Meta:
        widgets = {
            'participant': ModelSelect2(url='bda-participant-autocomplete'),
            'spectacle': ModelSelect2(url='bda-spectacle-autocomplete'),
        }


class ChoixSpectacleInline(admin.TabularInline):
    model = ChoixSpectacle
    form = ChoixSpectacleAdminForm
    sortable_field_name = "priority"


class AttributionTabularAdminForm(forms.ModelForm):
    listing = None

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        spectacles = Spectacle.objects.select_related('location')
        if self.listing is not None:
            spectacles = spectacles.filter(listing=self.listing)
        self.fields['spectacle'].queryset = spectacles


class WithoutListingAttributionTabularAdminForm(AttributionTabularAdminForm):
    listing = False


class WithListingAttributionTabularAdminForm(AttributionTabularAdminForm):
    listing = True


class AttributionInline(admin.TabularInline):
    model = Attribution
    extra = 0
    listing = None

    def get_queryset(self, request):
        qs = super().get_queryset(request)
        if self.listing is not None:
            qs = qs.filter(spectacle__listing=self.listing)
        return qs


class WithListingAttributionInline(AttributionInline):
    exclude = ('given', )
    form = WithListingAttributionTabularAdminForm
    listing = True


class WithoutListingAttributionInline(AttributionInline):
    form = WithoutListingAttributionTabularAdminForm
    listing = False


class ParticipantAdminForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['choicesrevente'].queryset = (
            Spectacle.objects
            .select_related('location')
        )


class ParticipantAdmin(ReadOnlyMixin, admin.ModelAdmin):
    inlines = [WithListingAttributionInline, WithoutListingAttributionInline]

    def get_queryset(self, request):
        return Participant.objects.annotate(nb_places=Count('attributions'),
                                            total=Sum('attributions__price'))

    def nb_places(self, obj):
        return obj.nb_places
    nb_places.admin_order_field = "nb_places"
    nb_places.short_description = "Nombre de places"

    def total(self, obj):
        tot = obj.total
        if tot:
            return "%.02f €" % tot
        else:
            return "0 €"
    total.admin_order_field = "total"
    total.short_description = "Total à payer"
    list_display = ("user", "nb_places", "total", "paid", "paymenttype",
                    "tirage")
    list_filter = ("paid", "tirage")
    search_fields = ('user__username', 'user__first_name', 'user__last_name')
    actions = ['send_attribs', ]
    actions_on_bottom = True
    list_per_page = 400
    readonly_fields = ("total",)
    readonly_fields_update = ('user', 'tirage')
    form = ParticipantAdminForm

    def send_attribs(self, request, queryset):
        datatuple = []
        for member in queryset.all():
            attribs = member.attributions.all()
            context = {'member': member.user}
            shortname = ""
            if len(attribs) == 0:
                shortname = "bda-attributions-decus"
            else:
                shortname = "bda-attributions"
                context['places'] = attribs
            print(context)
            datatuple.append((shortname, context, "bda@ens.fr",
                             [member.user.email]))
        send_mass_custom_mail(datatuple)
        count = len(queryset.all())
        if count == 1:
            message_bit = "1 membre a"
            plural = ""
        else:
            message_bit = "%d membres ont" % count
            plural = "s"
        self.message_user(request, "%s été informé%s avec succès."
                          % (message_bit, plural))
    send_attribs.short_description = "Envoyer les résultats par mail"


class AttributionAdminForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        if 'spectacle' in self.fields:
            self.fields['spectacle'].queryset = (
                Spectacle.objects
                .select_related('location')
            )
        if 'participant' in self.fields:
            self.fields['participant'].queryset = (
                Participant.objects
                .select_related('user', 'tirage')
            )

    def clean(self):
        cleaned_data = super().clean()
        participant = cleaned_data.get("participant")
        spectacle = cleaned_data.get("spectacle")
        if participant and spectacle:
            if participant.tirage != spectacle.tirage:
                raise forms.ValidationError(
                    "Erreur : le participant et le spectacle n'appartiennent"
                    "pas au même tirage")
        return cleaned_data


class AttributionAdmin(ReadOnlyMixin, admin.ModelAdmin):
    def paid(self, obj):
        return obj.participant.paid
    paid.short_description = 'A payé'
    paid.boolean = True
    list_display = ("id", "spectacle", "participant", "given", "paid")
    search_fields = ('spectacle__title', 'participant__user__username',
                     'participant__user__first_name',
                     'participant__user__last_name')
    form = AttributionAdminForm
    readonly_fields_update = ('spectacle', 'participant')


class ChoixSpectacleAdmin(admin.ModelAdmin):
    form = ChoixSpectacleAdminForm

    def tirage(self, obj):
        return obj.participant.tirage
    list_display = ("participant", "tirage", "spectacle", "priority",
                    "double_choice")
    list_filter = ("double_choice", "participant__tirage")
    search_fields = ('participant__user__username',
                     'participant__user__first_name',
                     'participant__user__last_name',
                     'spectacle__title')


class QuoteInline(admin.TabularInline):
    model = Quote


class SpectacleAdmin(admin.ModelAdmin):
    inlines = [QuoteInline]
    model = Spectacle
    list_display = ("title", "date", "tirage", "location", "slots", "price",
                    "listing")
    list_filter = ("location", "tirage",)
    search_fields = ("title", "location__name")
    readonly_fields = ("rappel_sent", )


class TirageAdmin(admin.ModelAdmin):
    model = Tirage
    list_display = ("title", "ouverture", "fermeture", "active",
                    "enable_do_tirage")
    readonly_fields = ("tokens", )
    list_filter = ("active", )
    search_fields = ("title", )


class SalleAdmin(admin.ModelAdmin):
    model = Salle
    search_fields = ('name', 'address')


class SpectacleReventeAdminForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['confirmed_entry'].queryset = (
            Participant.objects
            .select_related('user', 'tirage')
        )
        self.fields['seller'].queryset = (
            Participant.objects
            .select_related('user', 'tirage')
        )
        self.fields['soldTo'].queryset = (
            Participant.objects
            .select_related('user', 'tirage')
        )


class SpectacleReventeAdmin(admin.ModelAdmin):
    """
    Administration des reventes de spectacles
    """
    model = SpectacleRevente

    def spectacle(self, obj):
        """
        Raccourci vers le spectacle associé à la revente.
        """
        return obj.attribution.spectacle

    list_display = ("spectacle", "seller", "date", "soldTo")
    raw_id_fields = ("attribution",)
    readonly_fields = ("date_tirage",)
    search_fields = ['attribution__spectacle__title',
                     'seller__user__username',
                     'seller__user__first_name',
                     'seller__user__last_name']

    actions = ['transfer', 'reinit']
    actions_on_bottom = True
    form = SpectacleReventeAdminForm

    def transfer(self, request, queryset):
        """
        Effectue le transfert des reventes pour lesquels on connaît l'acheteur.
        """
        reventes = queryset.exclude(soldTo__isnull=True).all()
        count = reventes.count()
        for revente in reventes:
            attrib = revente.attribution
            attrib.participant = revente.soldTo
            attrib.save()
        self.message_user(
            request,
            "%d attribution%s %s été transférée%s avec succès." % (
                count, pluralize(count),
                pluralize(count, "a,ont"), pluralize(count))
            )
    transfer.short_description = "Transférer les reventes sélectionnées"

    def reinit(self, request, queryset):
        """
        Réinitialise les reventes.
        """
        count = queryset.count()
        for revente in queryset.filter(
                attribution__spectacle__date__gte=timezone.now()):
            revente.reset(new_date=timezone.now() - timedelta(hours=1))
        self.message_user(
            request,
            "%d attribution%s %s été réinitialisée%s avec succès." % (
                count, pluralize(count),
                pluralize(count, "a,ont"), pluralize(count))
            )
    reinit.short_description = "Réinitialiser les reventes sélectionnées"


admin.site.register(CategorieSpectacle)
admin.site.register(Spectacle, SpectacleAdmin)
admin.site.register(Salle, SalleAdmin)
admin.site.register(Participant, ParticipantAdmin)
admin.site.register(Attribution, AttributionAdmin)
admin.site.register(ChoixSpectacle, ChoixSpectacleAdmin)
admin.site.register(Tirage, TirageAdmin)
admin.site.register(SpectacleRevente, SpectacleReventeAdmin)