"""工单 SQL 逐条执行记录 — 支持执行进度透明展示。

每条 SQL 单独记录执行状态、耗时、影响行数、错误信息。
"""

from sqlalchemy import Column, Integer, String, Text, DateTime, ForeignKey, func
from sqlalchemy.orm import relationship

from app.core.database import Base


class TicketSqlItem(Base):
    __tablename__ = "ticket_sql_items"

    id = Column(Integer, primary_key=True, autoincrement=True)
    ticket_id = Column(Integer, ForeignKey("tickets.id"), nullable=False, index=True)
    seq = Column(Integer, nullable=False, comment="SQL 顺序号，从 1 开始")
    sql_text = Column(Text, nullable=False, comment="单条 SQL 文本")
    sql_type = Column(String(20), nullable=True, comment="SQL 类型: DDL/DML/DQL/SET 等")
    status = Column(String(20), default="pending", comment="pending/running/success/failed/skipped")
    affected_rows = Column(Integer, default=0)
    duration_ms = Column(Integer, default=0, comment="执行耗时（毫秒）")
    error_message = Column(Text, nullable=True)
    started_at = Column(DateTime, nullable=True)
    finished_at = Column(DateTime, nullable=True)
    created_at = Column(DateTime, server_default=func.now())

    ticket = relationship("Ticket", backref="sql_items")