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

class Alert(Base):
    __tablename__ = "alerts"
    id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    user_id = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
    type = Column(String(50), nullable=False)
    severity = Column(String(10), nullable=False)  # green, yellow, red
    message = Column(Text, nullable=False)
    ai_analysis = Column(Text)
    is_read = Column(Boolean, default=False)
    created_at = Column(DateTime, default=datetime.utcnow)
    
    user = relationship("User", back_populates="alerts")