"""
告警规则模型
"""
from sqlalchemy import Column, String, Text, Integer, Boolean, DateTime, ForeignKey, JSON, func
from sqlalchemy.dialects.mysql import CHAR
from sqlalchemy.orm import relationship
from app.core.database import Base
import uuid


class AlertRule(Base):
    """告警规则表"""
    __tablename__ = "alert_rules"

    id = Column(CHAR(36), primary_key=True, default=lambda: str(uuid.uuid4()), comment="告警规则ID")
    name = Column(String(100), nullable=False, comment="规则名称")
    description = Column(Text, comment="规则描述")
    
    # 告警类型：execution_failed（执行失败）、execution_timeout（执行超时）、error_rate（错误率）、resource_usage（资源使用）
    alert_type = Column(String(50), nullable=False, comment="告警类型")
    
    # 监控目标：workflow（工作流）、agent（智能体）、system（系统）
    target_type = Column(String(50), nullable=False, comment="监控目标类型")
    target_id = Column(CHAR(36), nullable=True, comment="监控目标ID（为空则监控所有）")
    
    # 告警条件（JSON格式）
    # 例如：{"threshold": 5, "time_window": 3600, "comparison": "gt"} 表示1小时内失败次数大于5
    conditions = Column(JSON, nullable=False, comment="告警条件")
    
    # 通知方式：email（邮件）、webhook（Webhook）、internal（站内通知）
    notification_type = Column(String(50), nullable=False, comment="通知方式")
    notification_config = Column(JSON, nullable=True, comment="通知配置（如邮箱地址、Webhook URL等）")
    
    # 状态
    enabled = Column(Boolean, default=True, comment="是否启用")
    
    # 统计信息
    trigger_count = Column(Integer, default=0, comment="触发次数")
    last_triggered_at = Column(DateTime, comment="最后触发时间")
    
    # 用户关联
    user_id = Column(CHAR(36), ForeignKey("users.id"), nullable=False, comment="创建者ID")
    
    # 时间戳
    created_at = Column(DateTime, default=func.now(), comment="创建时间")
    updated_at = Column(DateTime, default=func.now(), onupdate=func.now(), comment="更新时间")

    # 关系
    user = relationship("User", backref="alert_rules")

    def __repr__(self):
        return f"<AlertRule(id={self.id}, name={self.name}, alert_type={self.alert_type})>"


class AlertLog(Base):
    """告警日志表"""
    __tablename__ = "alert_logs"

    id = Column(CHAR(36), primary_key=True, default=lambda: str(uuid.uuid4()), comment="告警日志ID")
    rule_id = Column(CHAR(36), ForeignKey("alert_rules.id"), nullable=False, comment="告警规则ID")
    
    # 告警信息
    alert_type = Column(String(50), nullable=False, comment="告警类型")
    severity = Column(String(20), default="warning", comment="严重程度：info/warning/error/critical")
    message = Column(Text, nullable=False, comment="告警消息")
    details = Column(JSON, comment="详细信息")
    
    # 状态
    status = Column(String(20), default="pending", comment="状态：pending/sent/failed/acknowledged")
    
    # 通知信息
    notification_type = Column(String(50), comment="通知方式")
    notification_result = Column(Text, comment="通知结果")
    
    # 时间戳
    triggered_at = Column(DateTime, default=func.now(), comment="触发时间")
    acknowledged_at = Column(DateTime, comment="确认时间")
    acknowledged_by = Column(CHAR(36), ForeignKey("users.id"), nullable=True, comment="确认人ID")

    # 关系
    rule = relationship("AlertRule", backref="logs")
    acknowledged_user = relationship("User", foreign_keys=[acknowledged_by])

    def __repr__(self):
        return f"<AlertLog(id={self.id}, rule_id={self.rule_id}, severity={self.severity})>"