from django.contrib import admin
from django.utils import timezone

from .models import (
    Bareme, Entreprise, Client, Facture, LigneFacture, Depense, Paiement,
)


@admin.register(Bareme)
class BaremeAdmin(admin.ModelAdmin):
    list_display = ("annee", "activite", "taux_urssaf", "abattement_fiscal",
                    "taux_vl", "seuil_ca", "seuil_tva_base")
    list_filter = ("annee", "activite")


@admin.register(Entreprise)
class EntrepriseAdmin(admin.ModelAdmin):
    list_display = ("nom", "activite", "franchise_tva",
                    "versement_liberatoire", "num_tva_intracom", "email")
    list_filter = ("activite", "franchise_tva", "versement_liberatoire")
    search_fields = ("nom", "siret", "num_tva_intracom")


@admin.register(Client)
class ClientAdmin(admin.ModelAdmin):
    list_display = ("nom", "entreprise", "email", "siret")
    list_filter = ("entreprise",)
    search_fields = ("nom", "email", "siret")


class LigneFactureInline(admin.TabularInline):
    model = LigneFacture
    extra = 1


@admin.action(description="Marquer comme encaissée (aujourd'hui)")
def marquer_encaissee(modeladmin, request, queryset):
    queryset.update(statut="encaissee", date_encaissement=timezone.now().date())


@admin.register(Facture)
class FactureAdmin(admin.ModelAdmin):
    list_display = ("numero", "entreprise", "client", "date_emission",
                    "date_encaissement", "statut", "montant_ht",
                    "montant_tva", "montant_ttc")
    list_filter = ("entreprise", "statut", "activite", "date_emission")
    search_fields = ("numero", "client__nom")
    date_hierarchy = "date_emission"
    inlines = [LigneFactureInline]
    actions = [marquer_encaissee]
    readonly_fields = ("montant_ht", "montant_tva", "montant_ttc")

    def save_related(self, request, form, formsets, change):
        super().save_related(request, form, formsets, change)
        form.instance.recompute_totaux()


class DepenseInline(admin.TabularInline):
    model = Depense
    extra = 0
    fields = ("date", "libelle", "activite", "regime_tva", "taux_tva",
              "montant_ttc", "montant_tva")


@admin.register(Paiement)
class PaiementAdmin(admin.ModelAdmin):
    list_display = ("date", "entreprise", "libelle", "sens", "montant_total",
                    "reparti", "reste", "equilibre")
    list_filter = ("entreprise", "sens", "date")
    search_fields = ("libelle",)
    date_hierarchy = "date"
    inlines = [DepenseInline]

    @admin.display(description="Réparti")
    def reparti(self, obj):
        return obj.reparti

    @admin.display(description="Reste")
    def reste(self, obj):
        return obj.reste

    @admin.display(boolean=True, description="Équilibré")
    def equilibre(self, obj):
        return obj.equilibre


@admin.register(Depense)
class DepenseAdmin(admin.ModelAdmin):
    list_display = ("date", "entreprise", "libelle", "activite", "regime_tva",
                    "montant_ttc", "montant_tva", "tva_autoliq", "paiement")
    list_filter = ("entreprise", "regime_tva", "activite", "categorie", "date")
    search_fields = ("libelle", "categorie")
    date_hierarchy = "date"

    @admin.display(description="TVA auto-liquidée")
    def tva_autoliq(self, obj):
        return obj.tva_autoliquidee