"""知识库表的 ORM 映射。

按 docs/00 基线与 docs/02 建表设计逐列对齐现库；milvus_collection 是基线自带字段，
不需要新增迁移。本模块只做映射，读写由 Repository/Service 负责。
"""

from datetime import date, datetime
from typing import Any

from sqlalchemy import JSON, BigInteger, Date, DateTime, String, Text
from sqlalchemy.orm import Mapped, mapped_column

from app.model.base import Base


class KnowledgeMeta(Base):
    __tablename__ = "fin_knowledge_meta"

    id: Mapped[int] = mapped_column(BigInteger, primary_key=True)
    knowledge_type: Mapped[str] = mapped_column(String(32), nullable=False)
    title: Mapped[str] = mapped_column(String(256), nullable=False)
    source_file: Mapped[str | None] = mapped_column(String(256))
    minio_path: Mapped[str | None] = mapped_column(String(512))
    milvus_collection: Mapped[str] = mapped_column(String(64), nullable=False)
    version: Mapped[str | None] = mapped_column(String(16))
    effective_date: Mapped[date | None] = mapped_column(Date)
    expire_date: Mapped[date | None] = mapped_column(Date)
    content_text: Mapped[str] = mapped_column(Text, nullable=False)
    tags: Mapped[dict[str, Any] | None] = mapped_column(JSON)
    reviewer_id: Mapped[int | None] = mapped_column(BigInteger)
    review_status: Mapped[str] = mapped_column(
        String(16), nullable=False, default="pending")
    status: Mapped[str] = mapped_column(String(16), nullable=False)
    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)


class FaqSynonym(Base):
    __tablename__ = "agent_faq_synonym"

    id: Mapped[int] = mapped_column(BigInteger, primary_key=True)
    knowledge_id: Mapped[int] = mapped_column(BigInteger, nullable=False)
    phrase: Mapped[str] = mapped_column(String(500), nullable=False)
    normalized_phrase: Mapped[str] = mapped_column(String(500), nullable=False)
    phrase_hash: Mapped[str] = mapped_column(String(64), nullable=False)
    language_code: Mapped[str] = mapped_column(
        String(16), nullable=False, default="zh-CN")
    source_type: Mapped[str] = mapped_column(
        String(24), nullable=False, default="manual")
    hit_count: Mapped[int] = mapped_column(BigInteger, nullable=False, default=0)
    status: Mapped[str] = mapped_column(String(16), nullable=False, default="pending")
    created_by: Mapped[int] = mapped_column(BigInteger, nullable=False)
    reviewer_id: Mapped[int | None] = mapped_column(BigInteger)
    reviewed_at: Mapped[datetime | None] = mapped_column(DateTime)
    created_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)
    updated_at: Mapped[datetime] = mapped_column(DateTime, nullable=False)


# 知识生命周期代码沿用该名称；保留别名避免重复声明同一张表。
FinKnowledgeMeta = KnowledgeMeta