import type {
  LocalMediaHit,
  MediaKind,
  SearchInventoryState,
  SearchRelease,
  SearchReleaseParsed,
  SearchRuleVerdict,
  SearchSiteStatus,
} from "@umt/contracts";
import { Compass, type LucideIcon, Zap } from "lucide-react";
import type { StatusTone } from "~/components/console/status-badge.tsx";
import { MEDIA_KIND } from "~/components/library/labels.ts";

// 搜索结果的展示口径

export const mediaKindLabel = (k: MediaKind) => MEDIA_KIND[k] ?? k;

/** 本地作品的一行摘要:订阅 / 版本 / 下载中 / 缺口 */
export function slotSummary(h: LocalMediaHit): string {
  const c = h.slotCounts;
  const parts: string[] = [];
  if (h.subscribed) parts.push("已订阅");
  if (h.versionCount) parts.push(`${h.versionCount} 个版本`);
  if (h.downloadingCount) parts.push(`${h.downloadingCount} 个下载中`);
  const gaps = c.empty + c.attention + c.upgrade_pending;
  if (gaps) parts.push(`${gaps} 个收录版本未满足`);
  return parts.join(" · ") || "未订阅";
}

export const actionIcon = (kind: "page" | "action"): LucideIcon => (kind === "page" ? Compass : Zap);

export const INVENTORY_STATE: Record<SearchInventoryState, { label: string; tone: StatusTone }> = {
  downloading: { label: "下载中", tone: "warning" },
  gap: { label: "有缺口", tone: "warning" },
  owned: { label: "已有版本", tone: "success" },
  subscribed: { label: "已订阅", tone: "neutral" },
  none: { label: "本地无版本", tone: "neutral" },
};

export const SITE_STATUS: Record<SearchSiteStatus, string> = {
  ok: "正常",
  failed: "失败",
  timeout: "超时",
  skipped: "跳过",
};

export const SORT_OPTIONS = [
  { value: "default", label: "默认" },
  { value: "seeders", label: "做种数" },
  { value: "size", label: "大小" },
  { value: "uploadedAt", label: "发布时间" },
  { value: "site", label: "站点" },
] as const;

const PROMO: Record<string, string> = {
  free: "免费",
  "2xfree": "2x 免费",
  "50%": "50%",
  "2x50%": "2x 50%",
  "30%": "30%",
  "2x": "2x 上传",
};
/** 促销文案;none/unknown 返回 null */
export function promoLabel(type: string): string | null {
  if (!type || type === "none" || type === "unknown") return null;
  return PROMO[type] ?? type;
}

const GB = 1024 ** 3;
export const gbToBytes = (s: string): number | undefined => {
  const n = Number(s);
  return s.trim() && Number.isFinite(n) && n >= 0 ? Math.round(n * GB) : undefined;
};

// ── 资源行(SEARCH-5:学 MP 的规格标签、促销角标、按作品分组;加上本工具的规则判定)──

export type SpecDim = "episode" | "resolution" | "source" | "codec" | "hdr" | "audio" | "lang" | "group";
export interface ReleaseSpecTag {
  key: string;
  dim: SpecDim;
  label: string;
  /** 悬停提示:「分辨率：1080p」 */
  title: string;
}

export const SPEC_DIM_LABEL: Record<SpecDim, string> = {
  episode: "季集",
  resolution: "分辨率",
  source: "来源",
  codec: "编码",
  hdr: "HDR",
  audio: "音频",
  lang: "语言",
  group: "制作组",
};

const SUB_LABEL: Record<string, string> = {
  zh: "中字",
  "zh-Hans": "简中",
  "zh-Hant": "繁中",
  en: "英字",
  ja: "日字",
  ko: "韩字",
};
const DUB_LABEL: Record<string, string> = { cmn: "国语", yue: "粤语", en: "英语配音" };

const pad2 = (n: number) => String(n).padStart(2, "0");

/**
 * 规格标签,固定顺序:季集 → 分辨率 → 来源 → 编码 → HDR → 音频 → 配音 / 字幕语言 → 制作组。
 * 都来自标题解析;同名去重,不猜。
 */
export function releaseSpecTags(p: SearchReleaseParsed): ReleaseSpecTag[] {
  const out: ReleaseSpecTag[] = [];
  const seen = new Set<string>();
  const add = (dim: SpecDim, label: string | null | undefined) => {
    const l = label?.trim();
    if (!l || seen.has(`${dim}:${l.toLowerCase()}`)) return;
    seen.add(`${dim}:${l.toLowerCase()}`);
    out.push({ key: `${dim}:${l}`, dim, label: l, title: `${SPEC_DIM_LABEL[dim]}：${l}` });
  };
  if (p.season !== null || p.episodes) {
    const s =
      p.season !== null
        ? `S${pad2(p.season)}${p.seasonEnd && p.seasonEnd !== p.season ? `-S${pad2(p.seasonEnd)}` : ""}`
        : "";
    const e = p.episodes
      ? `E${pad2(p.episodes.start)}${p.episodes.end !== p.episodes.start ? `-E${pad2(p.episodes.end)}` : ""}`
      : "";
    add("episode", `${s}${e}`);
  }
  add("resolution", p.resolution);
  add("source", p.source);
  add("codec", p.videoCodec);
  for (const h of p.hdr) add("hdr", h);
  for (const a of p.audio ?? []) add("audio", a);
  for (const l of p.audioLangs ?? []) add("lang", DUB_LABEL[l] ?? l);
  for (const l of p.subtitles ?? []) add("lang", SUB_LABEL[l] ?? l);
  add("group", p.releaseGroup);
  return out;
}

/** 促销标签:免费(含 2x 免费)属状态,用 success;其余折扣中性 */
export function promoBadge(
  r: Pick<SearchRelease, "promotion" | "free">,
): { label: string; tone: "success" | "neutral" } | null {
  const label = promoLabel(r.promotion.type);
  if (!label) return null;
  return { label, tone: r.free ? "success" : "neutral" };
}

/** H&R:明确有 → warning;未知 → 中性「H&R 未知」;明确没有 → 不显示 */
export function hrBadge(r: Pick<SearchRelease, "hr">): { label: string; tone: "warning" | "neutral" } | null {
  if (r.hr === true) return { label: "H&R", tone: "warning" };
  if (r.hr === "unknown") return { label: "H&R 未知", tone: "neutral" };
  return null;
}

export interface VerdictView {
  label: string;
  tone: "success" | "neutral";
  /** 悬停提示:档位名、不满足的逐条说明 */
  title: string;
}

/** 规则判定 → 文案:「命中第 1 档」「满足收录条件」「不满足：分辨率、来源」「无法判断：分辨率」;多个收录版本时带名字 */
export function verdictView(v: SearchRuleVerdict): VerdictView {
  const dims = (xs: string[]) => (xs.length > 3 ? `${xs.slice(0, 3).join("、")} 等 ${xs.length} 项` : xs.join("、"));
  const text =
    v.outcome === "hit"
      ? v.tier !== null
        ? `命中第 ${v.tier} 档`
        : "满足收录条件"
      : v.outcome === "miss"
        ? `不满足：${dims(v.failed) || "收录条件"}`
        : `无法判断：${dims(v.failed) || "缺少字段"}`;
  const label = v.slotCount > 1 ? `「${v.slotName}」${text}` : text;
  const title = [v.slotCount > 1 ? `收录版本「${v.slotName}」` : null, v.tierName, ...v.details]
    .filter(Boolean)
    .join("\n");
  return { label, tone: v.outcome === "hit" ? "success" : "neutral", title };
}

/** 与库里版本比较:「比库里版本高 1 档」「比库里版本好」「与库里版本同档」「不如库里版本」 */
export function vsLibraryLabel(v: SearchRuleVerdict): string | null {
  const c = v.vsLibrary;
  if (!c) return null;
  if (c.cmp === "higher") return c.steps ? `比库里版本高 ${c.steps} 档` : "比库里版本好";
  if (c.cmp === "same") return "与库里版本同档";
  return "不如库里版本";
}

export interface WorkGroup {
  /** 作品 ID;未关联作品的一组为 null */
  key: string | null;
  entity: SearchRelease["entity"];
  entityMatch: SearchRelease["entityMatch"];
  inventory: SearchRelease["inventory"];
  items: SearchRelease[];
}

/**
 * 按作品分组(保持结果顺序,组按首次出现排;未关联作品的放最后)。
 * 只涉及一部作品(或全都未关联)时 grouped = false:作品名只在列表上方出现一次,行里不重复。
 */
export function groupByWork(rows: readonly SearchRelease[]): { grouped: boolean; groups: WorkGroup[] } {
  const map = new Map<string, WorkGroup>();
  let loose: WorkGroup | null = null;
  for (const r of rows) {
    if (!r.entity) {
      loose ??= { key: null, entity: null, entityMatch: null, inventory: null, items: [] };
      loose.items.push(r);
      continue;
    }
    let g = map.get(r.entity.id);
    if (!g) {
      g = { key: r.entity.id, entity: r.entity, entityMatch: r.entityMatch, inventory: r.inventory, items: [] };
      map.set(r.entity.id, g);
    }
    // 同一作品里有已识别的,组头就不标「未确认」
    if (r.entityMatch === "resolved") g.entityMatch = "resolved";
    g.inventory ??= r.inventory;
    g.items.push(r);
  }
  const groups = [...map.values(), ...(loose ? [loose] : [])];
  return { grouped: groups.length > 1, groups };
}