import { RELATED_DISPLAY_COUNT } from "@/components/drama-detail/data";
import { pickVideoCardTags } from "@/components/common/card-tags";
import { formatHeat } from "@/components/ranking/data";
import type { ShortDramaItem } from "@/components/short-drama/data";
import { mapVideoListItem } from "@/components/video/data";
import type {
  QueryVideoInfoResp,
  VideoData,
  VideoDetailInfo,
  VideoRecommendListResp,
} from "@/lib/api/types";
import { resolvePlayURL } from "@/lib/media/playback";

/** 详情页：直接使用接口 videoInfo 字段 */
export type VideoDetail = VideoDetailInfo;

/** H5 / 侧栏热门推荐条数 */
export const VIDEO_RECOMMEND_DISPLAY_COUNT = 10;

export type VideoPlayView = {
  detail: VideoDetail;
  src: string;
  related: ShortDramaItem[];
};

function mapHotVideoItem(item: VideoData): ShortDramaItem {
  return {
    kind: "drama",
    id: String(item.id),
    slug: item.slug?.trim() || undefined,
    title: (item.title || "").trim() || "未命名",
    subtitle: "",
    tags: pickVideoCardTags(item),
    heat: formatHeat(item.watchNum),
    episodes: "",
    cover: (item.coverImg || "").trim(),
    date: item.addedTime || undefined,
  };
}

/** 热门推荐：保留广告位；排除当前视频 */
export function mapVideoRecommendList(
  data: VideoRecommendListResp | null | undefined,
  options?: { excludeId?: number | string | null; limit?: number },
): ShortDramaItem[] {
  const excludeId = options?.excludeId != null ? Number(options.excludeId) : NaN;
  const limit = options?.limit ?? VIDEO_RECOMMEND_DISPLAY_COUNT;
  return (data?.list ?? [])
    .filter((item) => {
      if (item.type === 2) return true;
      if (!item.id) return false;
      if (Number.isFinite(excludeId) && Number(item.id) === excludeId) return false;
      return true;
    })
    .map(mapVideoListItem)
    .filter((item): item is ShortDramaItem => Boolean(item))
    .slice(0, limit);
}

/** 透传接口字段，仅拼播放地址 / 根级点赞收藏态 */
export function mapVideoInfo(data: QueryVideoInfoResp | null | undefined): VideoPlayView | null {
  const info = data?.videoInfo;
  if (!info?.id) return null;

  const media = info.video;
  const enableH265 = Boolean(data?.config?.enableH265);
  const path = (enableH265 && media?.h265Url?.trim() ? media.h265Url : media?.url) || media?.h265Url || "";
  const src = resolvePlayURL(path);

  return {
    detail: {
      ...info,
      isLike: Boolean(data?.isLike ?? info.isLike),
      isFavorite: Boolean(data?.isFavorite ?? info.isFavorite),
    },
    src,
    related: (data?.hotVideoList ?? [])
      .filter((item) => Boolean(item.id))
      .slice(0, RELATED_DISPLAY_COUNT)
      .map(mapHotVideoItem),
  };
}

export function formatWatchNum(count?: number | null) {
  const value = Number(count) || 0;
  if (value >= 10000) {
    const wan = value / 10000;
    const text = wan >= 100 ? String(Math.round(wan)) : wan.toFixed(1).replace(/\.0$/, "");
    return `${text}万次播放`;
  }
  return `${value}次播放`;
}

export function formatCount(count?: number | null) {
  const value = Number(count) || 0;
  if (value >= 10000) {
    const wan = value / 10000;
    const text = wan >= 100 ? String(Math.round(wan)) : wan.toFixed(1).replace(/\.0$/, "");
    return `${text}万`;
  }
  if (value >= 1000) {
    const k = value / 1000;
    return `${k.toFixed(1).replace(/\.0$/, "")}k`;
  }
  return String(value);
}