import uuid
from datetime import datetime

from sqlalchemy import DateTime, ForeignKey, String, func
from sqlalchemy.dialects.postgresql import UUID
from sqlalchemy.orm import Mapped, mapped_column

from api.models.base import Base


class MemoNotificationReceipt(Base):
    """Durable receipt for one informed-decision delivery id.

    The delivery id is the sender's stable idempotency key. The body is only
    memo id, question, class, and submitter. Rows are retained, not expired.
    """

    __tablename__ = "memo_notification_receipts"

    delivery_id: Mapped[str] = mapped_column(String(128), primary_key=True)
    body_digest: Mapped[str] = mapped_column(String(64), nullable=False)
    memo_id: Mapped[str] = mapped_column(String(63), nullable=False)
    question: Mapped[str] = mapped_column(String(400), nullable=False)
    memo_class: Mapped[str] = mapped_column(String(63), nullable=False)
    submitter: Mapped[str] = mapped_column(String(63), nullable=False)
    message_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True),
        ForeignKey("agent_messages.id", ondelete="RESTRICT"),
        nullable=False,
        index=True,
    )
    authoritative_review: Mapped[str] = mapped_column(
        String(40), nullable=False, default="signed-in-overview"
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )