from typing import Optional
from decimal import Decimal
from sqlalchemy import (
    Integer,
    String,
    DECIMAL,
    PrimaryKeyConstraint,
    DateTime,
    ForeignKeyConstraint,
    UniqueConstraint,
    ForeignKey,
)
from sqlalchemy.orm import Mapped, mapped_column
from core.database import Base


class ExchangeRate(Base):
    __tablename__ = "exchange_rate"
    __table_args__ = (
        PrimaryKeyConstraint("id", name="exchange_rate_pkey"),
        ForeignKeyConstraint(
            ["tenant_id"], ["a76.tenants.id"], name="fk_exchange_rate_tenant"
        ),
        ForeignKeyConstraint(
            ["company_id"], ["a76.company.id"], name="fk_exchange_rate_company"
        ),
        UniqueConstraint(
            "tenant_id", "company_id", "date", name="uq_exchange_rate_date_tenant"
        ),
        {"schema": "a76"},
    )

    id: Mapped[int] = mapped_column(Integer, primary_key=True)
    tenant_id: Mapped[int] = mapped_column(Integer, nullable=False, index=True)
    company_id: Mapped[int] = mapped_column(Integer, nullable=False, index=True)

    date: Mapped[int] = mapped_column(DateTime)
    value: Mapped[Optional[Decimal]] = mapped_column(DECIMAL(13, 6))
    local_currency: Mapped[Optional[str]] = mapped_column(String(7))
    foreign_currency: Mapped[Optional[str]] = mapped_column(String(7))