// 本章注入透明（B0/F1）纯逻辑：入选理由 / 实体类型 → 中文徽标。
// 纯函数，便于 node 环境单测；渲染层只管样式。

import type { components } from "@/lib/api/schema";

export type InjectionResponse = components["schemas"]["InjectionResponse"];
export type InjectionEntity = components["schemas"]["InjectionEntity"];

// SelectionReason → 作者可读徽标（对齐 ARCH §3.4 的四来源）。
export const REASON_LABELS: Record<string, string> = {
  explicit_beat: "本章点名",
  main_character: "主角常驻",
  recent_digest: "近章出现",
  foreshadow_window: "伏笔窗口",
};

// EntityKind → 中文。
export const KIND_LABELS: Record<string, string> = {
  character: "角色",
  world_entity: "设定",
};

// 未知 code 时回退原值（不吞，便于发现新理由）。
export function reasonLabel(reason: string): string {
  return REASON_LABELS[reason] ?? reason;
}

export function kindLabel(kind: string): string {
  return KIND_LABELS[kind] ?? kind;
}