import Link from "next/link";
import type { Artist } from "@/types/artist";
import ArtistPortrait from "@/components/cards/ArtistPortrait";
import { cn } from "@/lib/cn";

interface Top3PodiumProps {
  top3: Artist[];
}

function formatVotes(v: number): string {
  if (v >= 10_000) return `${(v / 10_000).toFixed(1)}w`;
  return v.toLocaleString();
}

export default function Top3Podium({ top3 }: Top3PodiumProps) {
  const [first, second, third] = top3;

  // 0 票时按编号兜底排出来的"伪冠军"不算 —— 这些位置当作缺位处理
  const champ = first && first.votes > 0 ? first : undefined;
  const runnerUp = second && second.votes > 0 ? second : undefined;
  const thirdPlace = third && third.votes > 0 ? third : undefined;

  // 视觉顺序：第二 / 第一(中央) / 第三 · 缺位 = 虚位以待
  const order: Array<{ artist: Artist | undefined; rank: 1 | 2 | 3 }> = [
    { artist: runnerUp, rank: 2 },
    { artist: champ, rank: 1 },
    { artist: thirdPlace, rank: 3 },
  ];

  const lead = champ && runnerUp ? champ.votes - runnerUp.votes : null;

  return (
    // 冠军卡片更宽更高（1.3fr），亚季军等宽（1fr），三张底部对齐；
    // 整个组合最大宽度受限并横向居中，避免在 1500 版心下占满铺张。
    <div className="grid grid-cols-[1fr_1.3fr_1fr] items-end gap-8 sm:gap-12 pt-12 sm:pt-14 max-w-[860px] mx-auto">
      {order.map(({ artist, rank }) => {
        if (!artist) {
          return <EmptySlot key={`empty-${rank}`} rank={rank} />;
        }
        const isFirst = rank === 1;

        return (
          <Link
            key={artist.id}
            href={`/artist/${artist.id}`}
            className="group relative block"
          >
            {/* 顶部奖牌 SVG · 悬浮在卡片顶边上方 */}
            {/* eslint-disable-next-line @next/next/no-img-element */}
            <img
              src={`/rank-${rank}.svg`}
              alt={`第 ${rank} 名`}
              className={cn(
                "absolute left-1/2 -translate-x-1/2 z-20 select-none pointer-events-none drop-shadow-[0_4px_12px_rgba(0,0,0,0.5)]",
                isFirst
                  ? "w-16 sm:w-20 -top-9 sm:-top-11"
                  : "w-14 sm:w-16 -top-7 sm:-top-9",
              )}
              draggable={false}
            />

            {/* 卡片容器（3:4 比例） · #1 金色渐变描边 + 金色辉光；#2 #3 紫色描边 */}
            <div
              className={cn(
                "relative aspect-[3/4] rounded-xl overflow-hidden transition-all",
                isFirst
                  ? "p-[2px] shadow-[0_8px_36px_rgba(0,0,0,0.55),0_0_36px_rgba(255,200,120,0.20)]"
                  : "border border-purple-500/40 shadow-[0_8px_32px_rgba(0,0,0,0.55),0_0_24px_rgba(139,92,246,0.18)] hover:border-purple-400/60",
              )}
              style={
                isFirst
                  ? {
                      background:
                        "linear-gradient(180deg, #FFDAA8 0%, #A88351 100%)",
                    }
                  : undefined
              }
            >
              {/* 内层 · #1 用 2px 内填让金色渐变作为描边露出 */}
              <div
                className={cn(
                  "relative w-full h-full overflow-hidden bg-deepest",
                  isFirst ? "rounded-[10px]" : "rounded-[11px]",
                )}
              >
                {/* 立绘填满卡片 */}
                <ArtistPortrait
                  artist={artist}
                  rounded="rounded-none"
                  className="absolute inset-0"
                />

                {/* 底部渐隐 + 信息层 */}
                <div className="absolute inset-x-0 bottom-0 px-3 pb-3 pt-10 bg-gradient-to-t from-black/90 via-black/65 to-transparent text-center">
                  <div
                    className="text-sm sm:text-base font-semibold truncate"
                    style={{ color: "#ffffff" }}
                  >
                    {artist.name}
                  </div>
                  <div className="mt-0.5 font-display tabular-nums text-base sm:text-lg text-pink-400">
                    {formatVotes(artist.votes)}{" "}
                    <span className="text-xs text-pink-300/80">票</span>
                  </div>
                  {isFirst && lead != null && lead > 0 && (
                    <div className="mt-1 text-[11px] text-white/60 tabular-nums">
                      领先 +{lead.toLocaleString()}
                    </div>
                  )}
                </div>
              </div>
            </div>
          </Link>
        );
      })}
    </div>
  );
}

/** 虚位以待 · 任意 rank 缺位时的占位卡片，与正式卡片同 3:4 比例对齐底边 */
function EmptySlot({ rank }: { rank: 1 | 2 | 3 }) {
  const isFirst = rank === 1;
  return (
    <div className="relative">
      {/* eslint-disable-next-line @next/next/no-img-element */}
      <img
        src={`/rank-${rank}.svg`}
        alt={`第 ${rank} 名`}
        className={cn(
          "absolute left-1/2 -translate-x-1/2 z-20 select-none pointer-events-none opacity-40 drop-shadow-[0_4px_12px_rgba(0,0,0,0.5)]",
          isFirst
            ? "w-16 sm:w-20 -top-9 sm:-top-11"
            : "w-14 sm:w-16 -top-7 sm:-top-9",
        )}
        draggable={false}
      />
      <div className="relative aspect-[3/4] rounded-xl border border-dashed border-white/12 bg-white/[0.02] flex items-center justify-center">
        <div className="text-center px-3">
          <p className="font-label text-[10px] tracking-widest uppercase text-white/35">
            Vacant
          </p>
          <p className="mt-1 text-xs text-white/55">虚位以待</p>
        </div>
      </div>
    </div>
  );
}