"""CheckoutActivity ORM model — append-only audit trail."""
from datetime import datetime
from typing import Optional, TYPE_CHECKING

from sqlalchemy import Integer, String, Text, DateTime, ForeignKey, JSON
from sqlalchemy.orm import Mapped, mapped_column, relationship
from sqlalchemy.sql import func

from src.apps.base.models.base import Base

if TYPE_CHECKING:
    from src.apps.checkouts.models.checkout import Checkout


class CheckoutActivity(Base):
    __tablename__ = "checkout_activities"

    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
    checkout_id: Mapped[int] = mapped_column(Integer, ForeignKey("checkouts.id"), nullable=False, index=True)
    merchant_id: Mapped[int] = mapped_column(Integer, ForeignKey("merchants.id"), nullable=False, index=True)
    actor_user_id: Mapped[Optional[int]] = mapped_column(Integer, ForeignKey("users.id"), nullable=True)
    actor_customer_id: Mapped[Optional[int]] = mapped_column(Integer, ForeignKey("customers.id"), nullable=True)
    event_type: Mapped[str] = mapped_column(String(100), nullable=False, index=True)
    description: Mapped[str] = mapped_column(Text, nullable=False)
    metadata_: Mapped[Optional[dict]] = mapped_column("metadata", JSON, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now(), nullable=False)

    checkout: Mapped["Checkout"] = relationship("Checkout", back_populates="activities")