import type { Decision } from "@umt/contracts";
import { useDecisions } from "~/api/decisions.ts";
import { humanizeReason } from "~/lib/reasons.ts";
import { EpisodeDecision } from "./decision.tsx";

// 集数待确认的原因(2026-10-06 去掉待处理中心后):不再作为逐条要处理的条目,
// 同一作品的问题聚合在作品页「集数映射」与订阅详情里显示原因;智能体建议 / 建议规则可在这里采用(写进作品识别词)。
// 数据来自内部事项 episode_mapping(只给关注中的作品开,见 server sources-identity/service/watched.ts)。

const OPEN = ["open", "investigating", "awaiting_user"];

function entityOf(d: Decision): string | null {
  const m = d.evidence.mediaEntityId;
  return typeof m === "string" ? m : d.subjectType === "media_entity" ? d.subjectId : null;
}

/** 某作品(可选按来源季)未关闭的集数待确认事项 */
export function useEpisodeIssues(entityId: string | null | undefined, season?: number | null) {
  const q = useDecisions({ kind: "episode_mapping" }, !!entityId);
  const items = (q.data?.pages.flatMap((p) => p.items) ?? []).filter(
    (d) =>
      OPEN.includes(d.status) &&
      entityOf(d) === entityId &&
      (season == null || (d.evidence as { season?: unknown }).season === season),
  );
  return { ...q, items };
}

/** 作品页集数映射分区:逐组写原因,建议规则 / 智能体建议可确认 */
export function EpisodeIssuesList({ entityId, onEdit }: { entityId: string; onEdit?: (line: string) => void }) {
  const { items } = useEpisodeIssues(entityId);
  if (!items.length) return null;
  return (
    <div className="space-y-3">
      <p className="text-caption font-medium text-foreground">换算不了的资源（{items.length} 组）</p>
      <ul className="space-y-3">
        {items.map((d) => (
          <li key={d.id} className="rounded-lg border border-border/80 p-3">
            <EpisodeDecision d={d} open {...(onEdit ? { onEdit } : {})} />
          </li>
        ))}
      </ul>
    </div>
  );
}

/** 订阅详情:缺集原因一句一组(只读,处理去作品页) */
export function EpisodeIssueReasons({ entityId, season }: { entityId: string; season: number | null }) {
  const { items } = useEpisodeIssues(entityId, season);
  if (!items.length) return null;
  return (
    <ul className="mt-2 space-y-1 text-meta text-muted-foreground">
      {items.map((d) => (
        <li key={d.id} className="break-words">
          {d.summary ? humanizeReason(d.summary) : d.title}
        </li>
      ))}
    </ul>
  );
}