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

from __future__ import annotations

import uuid
from datetime import datetime
from decimal import Decimal

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[Decimal] = 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)