import ulid
from sqlalchemy import Column, String, Integer, DateTime, JSON, Index
from sqlalchemy.sql import func
from app.core.database.db_session import Base

class OutboxEvent(Base):
    __tablename__ = "outbox_events"

    event_id = Column(String(26), primary_key=True, default=lambda: str(ulid.new()))
    aggregate_type = Column(String(50), nullable=False, index=True) # PRODUCT, ORDER, INVENTORY, INVOICE
    aggregate_id = Column(String(26), nullable=False, index=True)
    aggregate_version = Column(Integer, nullable=False)
    payload_json = Column(JSON, nullable=False)
    status = Column(String(20), default="PENDING", index=True) # PENDING, PROCESSED, FAILED
    created_at = Column(DateTime, server_default=func.now(), index=True)

    __table_args__ = (
        Index('idx_outbox_status_created', 'status', 'created_at'),
        Index('idx_outbox_aggregate_ver', 'aggregate_type', 'aggregate_id', 'aggregate_version'),
    )