"""
Charge les barèmes 2026 et un jeu de données d'exemple (multi-activité).
Usage : python manage.py seed_demo
"""
from decimal import Decimal
from datetime import date

from django.core.management.base import BaseCommand

from compta.models import (
    Bareme, Entreprise, Client, Facture, LigneFacture, Depense, Activite,
    StatutFacture,
)

# Barèmes officiels 2026 (voir docs/regles-fiscales-2026.md)
BAREMES_2026 = [
    # activite, taux_urssaf, abattement, taux_vl, seuil_ca, tva_base, tva_majore
    (Activite.VENTE,       Decimal("12.30"), Decimal("71"), Decimal("1.0"),
     Decimal("203100"), Decimal("85000"), Decimal("93500")),
    (Activite.SERVICE_BIC, Decimal("21.20"), Decimal("50"), Decimal("1.7"),
     Decimal("83600"), Decimal("37500"), Decimal("41250")),
    (Activite.SERVICE_BNC, Decimal("25.60"), Decimal("34"), Decimal("2.2"),
     Decimal("83600"), Decimal("37500"), Decimal("41250")),
]


class Command(BaseCommand):
    help = "Charge les barèmes 2026 et des données d'exemple."

    def handle(self, *args, **options):
        for act, urssaf, ab, vl, sca, tb, tm in BAREMES_2026:
            Bareme.objects.update_or_create(
                activite=act, annee=2026,
                defaults=dict(taux_urssaf=urssaf, abattement_fiscal=ab,
                              taux_vl=vl, seuil_ca=sca,
                              seuil_tva_base=tb, seuil_tva_majore=tm),
            )
        self.stdout.write(self.style.SUCCESS("Barèmes 2026 chargés."))

        # Entreprise multi-activité : impression 3D (Vente BIC) + aide info (Presta BIC)
        ent, _ = Entreprise.objects.get_or_create(
            nom="JB Conseil",
            defaults=dict(activite=Activite.SERVICE_BIC, franchise_tva=False,
                          taux_tva_defaut=Decimal("20.00"),
                          versement_liberatoire=True, email="jb@example.fr"),
        )

        clients = {}
        for nom, mail in [("Acme SARL", "contact@acme.fr"),
                          ("Studio Lumiere", "hello@studiolumiere.fr"),
                          ("Mairie de Ville", "compta@ville.fr")]:
            c, _ = Client.objects.get_or_create(entreprise=ent, nom=nom,
                                                defaults=dict(email=mail))
            clients[nom] = c

        V, S = Activite.VENTE, Activite.SERVICE_BIC
        factures = [
            # numero, client, activite, emission, encaissement, statut, lignes
            ("2026-001", "Acme SARL",      S, date(2026, 1, 10), date(2026, 1, 25),
             StatutFacture.ENCAISSEE, [("Dépannage informatique", 2, 600)]),
            ("2026-002", "Studio Lumiere", V, date(2026, 1, 18), date(2026, 2, 5),
             StatutFacture.ENCAISSEE, [("Impression 3D - lot pièces", 1, 800)]),
            ("2026-003", "Mairie de Ville", S, date(2026, 2, 2), date(2026, 2, 20),
             StatutFacture.ENCAISSEE, [("Maintenance parc", 1, 2500)]),
            ("2026-004", "Acme SARL",      V, date(2026, 3, 1), date(2026, 3, 15),
             StatutFacture.ENCAISSEE, [("Impression 3D - prototype", 1, 1500)]),
            ("2026-005", "Studio Lumiere", S, date(2026, 3, 20), None,
             StatutFacture.ENVOYEE, [("Audit poste de travail", 1, 950)]),
        ]
        for numero, client_nom, activite, emis, enc, statut, lignes in factures:
            f, created = Facture.objects.get_or_create(
                entreprise=ent, numero=numero,
                defaults=dict(client=clients[client_nom], activite=activite,
                              date_emission=emis, date_encaissement=enc,
                              statut=statut),
            )
            if created:
                for des, qte, pu in lignes:
                    LigneFacture.objects.create(
                        facture=f, designation=des, quantite=Decimal(qte),
                        prix_unitaire_ht=Decimal(pu), taux_tva=Decimal("20"))
                f.recompute_totaux()

        Depense.objects.get_or_create(
            entreprise=ent, libelle="Bobines PLA/PETG", date=date(2026, 1, 15),
            defaults=dict(categorie="Matiere", activite=Activite.VENTE,
                          montant_ttc=Decimal("96.00"), montant_tva=Decimal("16.00")))
        Depense.objects.get_or_create(
            entreprise=ent, libelle="Abonnement outils", date=date(2026, 2, 10),
            defaults=dict(categorie="Logiciel", activite=Activite.SERVICE_BIC,
                          montant_ttc=Decimal("34.80"), montant_tva=Decimal("5.80")))

        self.stdout.write(self.style.SUCCESS("Données d'exemple chargées."))