from __future__ import annotations

from dataclasses import dataclass, replace


@dataclass(frozen=True)
class KnowledgeEvidence:
    chunk_id: str
    content: str
    score: float
    retriever: str
    object_uid: str
    object_type: str
    object_version: int
    business_domain_uid: str | None
    point_keys: tuple[str, ...]
    point_revisions: tuple[int, ...]
    generation: int
    source_updated_at: str | None
    freshness_status: str = "fresh"
    section_path: str | None = None

    def with_score_and_retriever(
        self, score: float, retriever: str
    ) -> KnowledgeEvidence:
        return replace(self, score=score, retriever=retriever)


@dataclass(frozen=True)
class SearchResult:
    evidence: tuple[KnowledgeEvidence, ...]
    mode: str
    degraded_components: tuple[str, ...] = ()