from datetime import datetime

from sqlalchemy import BigInteger, DateTime, Integer, String, text
from sqlalchemy.orm import Mapped, mapped_column

from app.model.base import Base


class ConversationSession(Base):
    __tablename__ = "svc_conversation_session"
    id: Mapped[int] = mapped_column(BigInteger, primary_key=True, autoincrement=True)
    session_id: Mapped[str] = mapped_column(String(64), unique=True)
    user_id: Mapped[int] = mapped_column(BigInteger)
    portal: Mapped[str] = mapped_column(String(32))
    agent_type: Mapped[str | None] = mapped_column(String(32))
    status: Mapped[str] = mapped_column(String(16), default="active")
    clarification_round: Mapped[int] = mapped_column(Integer, default=0)
    message_count: Mapped[int] = mapped_column(Integer, default=0)
    last_intent: Mapped[str | None] = mapped_column(String(32))
    config_version: Mapped[str | None] = mapped_column(String(64))
    started_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=text("CURRENT_TIMESTAMP(6)")
    )
    last_active_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=text("CURRENT_TIMESTAMP(6)")
    )
    ended_at: Mapped[datetime | None] = mapped_column(DateTime)
    created_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=text("CURRENT_TIMESTAMP(6)")
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, server_default=text("CURRENT_TIMESTAMP(6)")
    )