from sqlalchemy import String, Text
from sqlalchemy.dialects.sqlite import JSON
from sqlalchemy.orm import Mapped, mapped_column

from core_db import AuditMixin, Base, TenantMixin, VersionMixin
from core_shared import JSONValue


class KnowledgeBase(TenantMixin, AuditMixin, VersionMixin, Base):
    __tablename__ = "knowledge_base"

    code: Mapped[str] = mapped_column(String(64), index=True)
    name: Mapped[str] = mapped_column(String(128))
    description: Mapped[str | None] = mapped_column(Text, nullable=True)
    status: Mapped[str] = mapped_column(String(32), default="active", index=True)
    metadata_json: Mapped[dict[str, JSONValue] | None] = mapped_column(JSON, nullable=True)