"""Alert model - budget warnings, task failures, system events."""
from sqlalchemy import Column, String, Integer, Text, Boolean, ForeignKey
from app.models.base import Base, TimestampMixin, TenantMixin


class Alert(Base, TimestampMixin, TenantMixin):
    """System alerts: budget warnings, task failures, worker offline."""
    __tablename__ = "alerts"

    id = Column(Integer, primary_key=True, autoincrement=True)
    alert_type = Column(String(50), nullable=False)  # budget_warning, budget_exceeded, task_failed, worker_offline
    severity = Column(String(20), nullable=False, default="warning")  # info, warning, critical
    message = Column(Text, nullable=False)
    project_id = Column(Integer, ForeignKey("projects.id"), nullable=True)
    worker_id = Column(Integer, ForeignKey("ai_workers.id"), nullable=True)
    is_read = Column(Boolean, default=False, nullable=False)