"""Datos fiscales del emisor — ``fin.issuer_settings``.

Es la identidad fiscal con la que la empresa emite CFDI: razón social, RFC, régimen
fiscal y código postal del lugar de expedición. Hay **una sola configuración vigente
por empresa**, garantizada con un índice único parcial.
"""

from sqlalchemy import ForeignKey, Index, Integer, String, text
from sqlalchemy.orm import Mapped, mapped_column, relationship

from api.v1.common.base_models import TenantScopedMixin, TimestampMixin
from core.database import Base

from ..catalogs.models import TaxRegime  # noqa: F401  (resuelve la relación)

_ALIVE = text("deleted_at IS NULL")


class IssuerSettings(Base, TenantScopedMixin, TimestampMixin):
    """Configuración fiscal del emisor de la empresa."""

    __tablename__ = "issuer_settings"
    __table_args__ = (
        Index(
            "uq_fin_issuer_settings_company",
            "tenant_id", "company_id",
            unique=True, postgresql_where=_ALIVE, sqlite_where=_ALIVE,
        ),
        {"schema": "fin"},
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
    legal_name: Mapped[str] = mapped_column(String(255), nullable=False)  # razón social
    rfc: Mapped[str] = mapped_column(String(13), nullable=False)
    tax_regime_id: Mapped[int] = mapped_column(
        Integer, ForeignKey("sat.tax_regimes.id"), nullable=False, index=True
    )
    # CP del lugar de expedición del comprobante
    zip_code: Mapped[str | None] = mapped_column(String(5), nullable=True)
    updated_by: Mapped[str | None] = mapped_column(String(64), nullable=True)

    tax_regime: Mapped["TaxRegime"] = relationship("TaxRegime", lazy="selectin")