"""Tax rate model — ERP tax configuration."""

from __future__ import annotations

import uuid
from datetime import datetime

from sqlalchemy import Boolean, DateTime, Index, Numeric, String
from sqlalchemy.dialects.postgresql import UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin


class TaxRate(Base, TenantMixin):
    """Tax rate entity — e.g. 'Mehrwertsteuer 19%'."""

    __tablename__ = "tax_rates"
    __table_args__ = (
        Index("ix_tax_rates_tenant_name", "tenant_id", "name"),
        Index("ix_tax_rates_tenant_default", "tenant_id", "is_default"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    name: Mapped[str] = mapped_column(String(100), nullable=False)
    rate: Mapped[float] = mapped_column(Numeric(5, 2), nullable=False)
    is_default: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
    country: Mapped[str | None] = mapped_column(String(2), nullable=True)
    deleted_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)