"""Audit log model — general activity trail (v2.7)."""
import uuid

from sqlalchemy import Column, DateTime, String, Text, func
from sqlalchemy.dialects.postgresql import JSONB, UUID

from app.db.base import Base


class AuditLog(Base):
    __tablename__ = "audit_log"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    occurred_at = Column(DateTime(timezone=True), nullable=False, server_default=func.now())
    actor = Column(Text, nullable=True)  # display name of the authenticated user
    action = Column(String(64), nullable=False)  # e.g. "user.role_changed"
    entity = Column(String(64), nullable=False)  # e.g. "user", "inventory_tx"
    entity_id = Column(Text, nullable=True)
    details = Column(JSONB, nullable=False, server_default="{}")