from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, func

from app.core.database import Base


class Ticket(Base):
    __tablename__ = "tickets"

    id = Column(Integer, primary_key=True, autoincrement=True)
    ticket_no = Column(String(20), unique=True, nullable=True, comment="工单编号，格式: 20260522160543841")
    title = Column(String(200), nullable=False)
    db_type = Column(String(20), nullable=False)
    instance_id = Column(Integer, ForeignKey("instances.id"), nullable=False)
    target_database = Column(String(100), nullable=False)
    sql_content = Column(Text, nullable=False)
    rollback_sql = Column(Text, nullable=True)
    status = Column(String(20), default="pending")  # pending / reviewing / approved / rejected / executing / success / failed
    priority = Column(String(10), default="medium")  # high / medium / low
    risk_level = Column(String(20), default="low", comment="自动风险等级: low/medium/high/critical")
    workflow_id = Column(Integer, ForeignKey("workflow_definitions.id"), nullable=True, comment="关联审批流")
    exec_strategy = Column(String(20), default="stop_on_error", comment="执行策略: stop_on_error/continue/transaction")
    applicant_id = Column(Integer, ForeignKey("users.id"), nullable=False)
    approver_id = Column(Integer, ForeignKey("users.id"), nullable=True)
    reason = Column(Text, nullable=True)
    audit_result = Column(Text, nullable=True)
    execute_result = Column(Text, nullable=True)
    create_time = Column(DateTime, server_default=func.now())
    review_time = Column(DateTime, nullable=True)
    execute_time = Column(DateTime, nullable=True)
    scheduled_at = Column(DateTime, nullable=True, comment="定时执行时间，NULL=立即执行")
    updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now())