import uuid
from datetime import datetime
from typing import Any

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

from app.db import Base


class ProcessEvent(Base):
    __tablename__ = "process_events"

    id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), primary_key=True, server_default=text("gen_random_uuid()")
    )
    process_id: Mapped[uuid.UUID] = mapped_column(
        UUID(as_uuid=True), ForeignKey("processes.id", ondelete="CASCADE"), nullable=False
    )
    event_type: Mapped[str] = mapped_column(String, nullable=False)
    payload: Mapped[dict[str, Any] | None] = mapped_column(JSONB)
    occurred_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=text("now()")
    )