"""Модель сообщений чата."""

import uuid
from datetime import datetime, timezone

from sqlalchemy import Column, DateTime, ForeignKey, Text, func
from sqlalchemy.dialects.postgresql import UUID as PG_UUID
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.core.database import Base


class Message(Base):
    __tablename__ = "messages"

    id: Mapped[uuid.UUID] = mapped_column(PG_UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
    work_session_id: Mapped[uuid.UUID] = mapped_column(PG_UUID(as_uuid=True), ForeignKey("work_sessions.id"), nullable=False)
    sender_id: Mapped[uuid.UUID] = mapped_column(PG_UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
    content: Mapped[str] = mapped_column(Text, nullable=False)
    attachments: Mapped[list | None] = mapped_column("attachments", postgresql.JSONB, default=list)
    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())