import { DEFAULT_SETTINGS } from "@umt/contracts";
import { toast } from "sonner";
import { useClearImageCache, useClearTmdbCache, useImageCache, useTmdbCache } from "~/api/cache.ts";
import { useUpdateSettings } from "~/api/settings.ts";
import { StatusBadge } from "~/components/console/status-badge.tsx";
import { Button } from "~/components/ui/button.tsx";
import { errorMessage } from "~/lib/api.ts";
import { str } from "./resource-section.tsx";
import { type CardSpec, n, SettingsCard, SettingsGate } from "./settings-card.tsx";

// 元数据:TMDB API Key(只写,存 secret)、Base URL、语言回退链

const DEFAULT_LANGUAGES = DEFAULT_SETTINGS.metadata.languages;

/** "zh-CN, zh_sg en" → ["zh-CN","zh-SG","en"];不合法的项丢弃,全空回缺省 */
function parseLanguages(v: string): string[] {
  const out = v
    .split(/[,，、\s]+/)
    .map((x) => x.trim().replace("_", "-"))
    .filter(Boolean)
    .map((x) => {
      const [l, r] = x.split("-");
      return r ? `${l!.toLowerCase()}-${r.toUpperCase()}` : l!.toLowerCase();
    })
    .filter((x) => /^[a-z]{2,3}(-[A-Z]{2})?$/.test(x));
  return out.length ? [...new Set(out)].slice(0, 8) : [...DEFAULT_LANGUAGES];
}

const TMDB_CARD: CardSpec = {
  anchor: "tmdb",
  title: "TMDB",
  description: "留空时用环境变量 TMDB_API_KEY / TMDB_ACCESS_TOKEN / TMDB_BASE_URL。",
  fields: [
    {
      name: "metadata.tmdbApiKey",
      label: "API Key",
      kind: "password",
      hint: "v3 API Key 或 v4 Read Access Token；留空不修改",
      wide: true,
    },
    {
      name: "metadata.tmdbBaseUrl",
      label: "Base URL",
      kind: "url",
      placeholder: "https://api.themoviedb.org",
      hint: "自建反代时填写；留空用官方地址",
      wide: true,
    },
    {
      name: "metadata.languages",
      label: "语言回退链",
      kind: "text",
      placeholder: DEFAULT_LANGUAGES.join(", "),
      hint: "标题、简介和每集信息按顺序取第一个有值的语言；中文名取链中第一个中文值。逗号分隔，如 zh-CN, zh-SG",
      wide: true,
    },
    {
      name: "metadata.includeSpecials",
      label: "包含特别篇（季 0）",
      kind: "switch",
      hint: "全量刷新和元数据回刷时，TMDB 有季 0 就一并拉取每集信息。特别篇不计入正片季的总集数和订阅完成判定",
      wide: true,
    },
  ],
  fromSettings: (s) => ({
    "metadata.tmdbApiKey": "",
    "metadata.tmdbBaseUrl": s.metadata.tmdbBaseUrl ?? "",
    "metadata.languages": (s.metadata.languages ?? DEFAULT_LANGUAGES).join(", "),
    "metadata.includeSpecials": s.metadata.includeSpecials !== false,
  }),
  toPatch: (v) => ({
    metadata: {
      tmdbBaseUrl: str(v["metadata.tmdbBaseUrl"]) || null,
      languages: parseLanguages(str(v["metadata.languages"])),
      includeSpecials: v["metadata.includeSpecials"] === true,
      ...(str(v["metadata.tmdbApiKey"]) ? { tmdbApiKey: str(v["metadata.tmdbApiKey"]) } : {}),
    },
  }),
  extra: (s) => <TmdbKeyStatus saved={!!s.metadata.tmdbApiKeySecretRef} />,
};

function TmdbKeyStatus({ saved }: { saved: boolean }) {
  const update = useUpdateSettings();
  return (
    <div className="mb-2 flex flex-wrap items-center gap-2">
      <StatusBadge tone={saved ? "success" : "neutral"}>{saved ? "API Key 已保存" : "未保存 API Key"}</StatusBadge>
      {saved ? (
        <Button
          type="button"
          variant="ghost"
          size="xs"
          className="hover:text-destructive"
          disabled={update.isPending}
          onClick={async () => {
            try {
              await update.mutateAsync({ metadata: { tmdbApiKey: null } });
              toast.success("TMDB API Key 已清除");
            } catch (err) {
              toast.error(errorMessage(err, "清除失败"));
            }
          }}
        >
          清除
        </Button>
      ) : null}
    </div>
  );
}

// TMDB 缓存(对照 MP:META_CACHE_EXPIRE / CONF.tmdb / EMPTY_RESULT_CACHE_TTL)
const TMDB_CACHE_CARD: CardSpec = {
  anchor: "tmdb-cache",
  title: "TMDB 缓存",
  description:
    "请求响应与识别结果存在数据库里，三个进程共用。超过条数上限时删最久未用的条目；有效期在「自动化 → 存储与保留」里设。",
  fields: [{ name: "cache.tmdbMaxSize", label: "条数上限", kind: "number", hint: "请求缓存和识别缓存各自计数" }],
  fromSettings: (s) => ({
    "cache.tmdbMaxSize": n(s.cache.tmdbMaxSize),
  }),
  toPatch: (v) => ({
    cache: {
      tmdbMaxSize: Number(v["cache.tmdbMaxSize"]),
    },
  }),
  extra: () => <TmdbCacheStatus />,
};

function TmdbCacheStatus() {
  const q = useTmdbCache();
  const clear = useClearTmdbCache();
  const c = q.data?.counts;
  return (
    <div className="mb-2 flex flex-wrap items-center gap-2 text-meta text-muted-foreground">
      <span className="tabular-nums">
        {c ? `识别 ${c.recognize} 条 · 请求 ${c.request} 条 · 上限各 ${q.data?.maxSize} 条` : "读取中…"}
      </span>
      <Button
        type="button"
        variant="ghost"
        size="xs"
        className="hover:text-destructive"
        disabled={clear.isPending}
        onClick={async () => {
          try {
            const r = await clear.mutateAsync();
            toast.success(`已清空 ${r.deleted} 条 TMDB 缓存`);
          } catch (err) {
            toast.error(errorMessage(err, "清空失败"));
          }
        }}
      >
        清空
      </Button>
    </div>
  );
}

// 图片代理与缓存(对照 MP GLOBAL_IMAGE_CACHE / GLOBAL_IMAGE_CACHE_DAYS)
const IMAGES_CARD: CardSpec = {
  anchor: "images",
  title: "图片代理与缓存",
  description: "海报经服务端从 TMDB 取回。开启缓存后保存到数据目录，下次直接读取。",
  fields: [
    { name: "cache.globalImageCache", label: "缓存图片", kind: "switch" },
    { name: "cache.globalImageCacheDays", label: "保留天数", kind: "number", hint: "超过天数的图片每天清理一次" },
  ],
  fromSettings: (s) => ({
    "cache.globalImageCache": s.cache.globalImageCache,
    "cache.globalImageCacheDays": n(s.cache.globalImageCacheDays),
  }),
  toPatch: (v) => ({
    cache: {
      globalImageCache: v["cache.globalImageCache"] === true,
      globalImageCacheDays: Number(v["cache.globalImageCacheDays"]),
    },
  }),
  extra: () => <ImageCacheStatus />,
};

function ImageCacheStatus() {
  const q = useImageCache();
  const clear = useClearImageCache();
  const d = q.data;
  return (
    <div className="mb-2 flex flex-wrap items-center gap-2 text-meta text-muted-foreground">
      <span className="tabular-nums">
        {d ? `${d.files} 张 · ${(d.usedBytes / 1024 / 1024).toFixed(1)} MiB` : "读取中…"}
      </span>
      <Button
        type="button"
        variant="ghost"
        size="xs"
        className="hover:text-destructive"
        disabled={clear.isPending}
        onClick={async () => {
          try {
            const r = await clear.mutateAsync();
            toast.success(`已删除 ${r.deleted} 张缓存图片`);
          } catch (err) {
            toast.error(errorMessage(err, "清空失败"));
          }
        }}
      >
        清空
      </Button>
    </div>
  );
}

// 身份识别(DEC-1 惰性识别,对照 MP:RSS / 列表资源只在匹配订阅或用户搜索时识别)
const IDENTITY_CARD: CardSpec = {
  anchor: "identity",
  title: "资源识别",
  description:
    "缺省只在资源命中订阅或本地作品别名、新作品收录规则前置条件通过、你手动识别或搜索时查 TMDB；其余进待识别池，不进待处理。",
  fields: [
    {
      name: "identity.eagerTmdbLookup",
      label: "每条新资源都查 TMDB",
      kind: "switch",
      hint: "旧行为。每条资源约 1–2 次搜索 + 命中时 1 次详情（识别缓存命中为 0）；每小时 100 条的 RSS 约每天 2400–7200 次请求，站点独有的短剧 / 综艺多半查不到",
      wide: true,
    },
    {
      name: "identity.autoEnrich",
      label: "TMDB 查不到时自动补全元数据",
      kind: "switch",
      hint: "资源命中订阅或新作品收录规则、TMDB 却没有结果时，自动搜索网页出一份补全建议（每条资源一次，不建作品）。每次约 1–2 次网页搜索、最多读 3 个网页、1 次 Agent 上游调用",
      wide: true,
    },
    {
      name: "identity.enrichDailyBudget",
      label: "元数据补全每日上限",
      kind: "number",
      hint: "手动和自动合计；7 天内同一标题直接用上次结果，不计次。0 = 停用",
    },
    {
      name: "identity.enrichDomains",
      label: "补全可读取的网站",
      kind: "textarea",
      hint: "每行一个域名，含子域名；只放平台和百科类网站。已登记站点的域名一律不读",
      wide: true,
    },
  ],
  fromSettings: (s) => ({
    "identity.eagerTmdbLookup": s.identity.eagerTmdbLookup,
    "identity.autoEnrich": s.identity.autoEnrich,
    "identity.enrichDailyBudget": n(s.identity.enrichDailyBudget),
    "identity.enrichDomains": s.identity.enrichDomains.join("\n"),
  }),
  toPatch: (v) => ({
    identity: {
      eagerTmdbLookup: v["identity.eagerTmdbLookup"] === true,
      autoEnrich: v["identity.autoEnrich"] === true,
      enrichDailyBudget: Number(v["identity.enrichDailyBudget"]),
      enrichDomains: String(v["identity.enrichDomains"] ?? "")
        .split(/[\s,，]+/)
        .map((d) => d.trim().toLowerCase())
        .filter(Boolean),
    },
  }),
};

export function MetadataSection() {
  return (
    <SettingsGate>
      {(s) => (
        <>
          <SettingsCard section="metadata" spec={TMDB_CARD} settings={s} />
          <SettingsCard section="metadata" spec={TMDB_CACHE_CARD} settings={s} />
          <SettingsCard section="metadata" spec={IDENTITY_CARD} settings={s} />
          <SettingsCard section="metadata" spec={IMAGES_CARD} settings={s} />
        </>
      )}
    </SettingsGate>
  );
}