from sqlalchemy import Column, String, Boolean, DateTime, Text, ForeignKey
from sqlalchemy.dialects.postgresql import UUID, JSONB
from datetime import datetime
from app.database import Base
import uuid


class Notification(Base):
    __tablename__ = "notifications"

    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id = Column(UUID(as_uuid=True), nullable=False, index=True)
    title = Column(String(255), nullable=False)
    content = Column(Text, nullable=False)
    notification_type = Column(String(50), default="system")
    reference_type = Column(String(50))
    reference_id = Column(String(255))
    is_read = Column(Boolean, default=False)
    notify_metadata = Column("metadata", JSONB, default={})
    created_at = Column(DateTime, default=datetime.utcnow)