from datetime import datetime, date
from decimal import Decimal
from sqlalchemy import String, DateTime, Date, ForeignKey, Numeric, JSON
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db.base import Base


class ExtractedField(Base):
    __tablename__ = "extracted_fields"

    id: Mapped[int] = mapped_column(primary_key=True, index=True)
    document_id: Mapped[int] = mapped_column(
        ForeignKey("documents.id"), nullable=False, index=True
    )

    merchant_raw: Mapped[str | None] = mapped_column(String(255), nullable=True)
    merchant_normalized: Mapped[str | None] = mapped_column(String(255), nullable=True)

    transaction_date: Mapped[date | None] = mapped_column(Date, nullable=True)

    subtotal: Mapped[Decimal | None] = mapped_column(Numeric(12, 2), nullable=True)
    tax: Mapped[Decimal | None] = mapped_column(Numeric(12, 2), nullable=True)
    total: Mapped[Decimal | None] = mapped_column(Numeric(12, 2), nullable=True)

    currency: Mapped[str | None] = mapped_column(String(10), nullable=True)
    payment_method: Mapped[str | None] = mapped_column(String(100), nullable=True)
    receipt_number: Mapped[str | None] = mapped_column(String(255), nullable=True)
    location: Mapped[str | None] = mapped_column(String(255), nullable=True)
    counterparty: Mapped[str | None] = mapped_column(String(255), nullable=True)

    extra_json: Mapped[dict | None] = mapped_column(JSON, nullable=True)

    created_at: Mapped[datetime] = mapped_column(
        DateTime, default=datetime.utcnow, nullable=False
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False
    )

    document: Mapped["Document"] = relationship(back_populates="extracted_fields")