"""转人工工单。"""
from datetime import datetime
from sqlalchemy import String, Text, DateTime, ForeignKey
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.models.base import Base


class Ticket(Base):
    __tablename__ = "tickets"

    id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
    session_id: Mapped[int] = mapped_column(ForeignKey("chat_sessions.id", ondelete="CASCADE"), nullable=False, index=True)
    reason: Mapped[str | None] = mapped_column(Text, nullable=True)
    status: Mapped[str] = mapped_column(String(32), default="open")  # open / handling / closed
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=datetime.utcnow)
    updated_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=datetime.utcnow, onupdate=datetime.utcnow)