"""Finance daily summary snapshot model.

Stores pre-computed daily reconciliation results in a single JSON column.
This keeps the schema stable: adding new summary fields requires no migration.
"""
from datetime import date, datetime, timezone
from typing import Optional

from sqlalchemy import Boolean, Date, DateTime, Integer, Text, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column

from app.database import Base


def _utcnow() -> datetime:
    return datetime.now(timezone.utc)


class FinanceDailySummary(Base):
    __tablename__ = "finance_daily_summaries"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
    stat_date: Mapped[date] = mapped_column(Date, unique=True, nullable=False, index=True)
    summary_json: Mapped[str] = mapped_column(Text, nullable=False)
    success: Mapped[bool] = mapped_column(Boolean, default=False, index=True)
    computed_at: Mapped[datetime] = mapped_column(DateTime, default=_utcnow)

    __table_args__ = (
        UniqueConstraint("stat_date", name="uq_finance_summary_date"),
    )