from __future__ import annotations

from datetime import datetime

from sqlalchemy import BigInteger, DateTime, ForeignKey, Index, Integer, String, Text, UniqueConstraint, func
from sqlalchemy.orm import Mapped, mapped_column

from app.models.base import Base


class MessageFeedback(Base):
    __tablename__ = "sys_message_feedback"
    __table_args__ = (
        UniqueConstraint("user_id", "message_id", name="uq_message_feedback_user_message"),
        Index("ix_message_feedback_read_created", "is_read", "created_at"),
    )

    id: Mapped[int] = mapped_column(BigInteger().with_variant(Integer, "sqlite"), primary_key=True, autoincrement=True)
    user_id: Mapped[int] = mapped_column(ForeignKey("sys_user.id"), nullable=False, index=True)
    session_id: Mapped[int] = mapped_column(ForeignKey("sys_chat_session.id"), nullable=False, index=True)
    message_id: Mapped[int] = mapped_column(ForeignKey("sys_chat_message.id"), nullable=False, index=True)
    content: Mapped[str] = mapped_column(String(200), nullable=False)
    is_read: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
    read_by: Mapped[int | None] = mapped_column(ForeignKey("sys_admin.id"), nullable=True)
    read_at: Mapped[datetime | None] = mapped_column(DateTime, nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, server_default=func.now(), nullable=False)