import Link from "next/link";
import { CheckCircle2, CircleHelp, Coins } from "lucide-react";
import type { AcceptedAnswer } from "@/lib/api";
import Avatar from "@/components/Avatar";
import MarkdownBody from "@/components/MarkdownBody";

/** 正文下方已采纳答案：对齐类型帖 typed-card；已采纳后不可重新打开 */
export default async function AcceptedAnswerCard({
  answer,
  variant = "question",
  solvedAt,
}: {
  answer: AcceptedAnswer;
  /** 问答用「最佳答案」，悬赏用「已采纳」 */
  variant?: "question" | "bounty";
  /** 解决/采纳时刻；缺省用答案创建时间 */
  solvedAt?: string;
}) {
  const author = answer.user;
  const name = author ? author.nickname || author.username || "用户" : "";
  const isQuestion = variant === "question";
  const title = isQuestion ? "问答" : "悬赏";
  const statusLabel = isQuestion ? "已解决" : "已采纳";
  const answerLabel = isQuestion ? "最佳答案" : "采纳答案";
  const endTime = solvedAt || answer.created_at;
  const endLabel = formatEndsAt(endTime);

  return (
    <section
      className={`j13-interact-card j13-typed-card j13-accepted-answer${isQuestion ? " is-question" : " is-bounty"}`}
      aria-label={`${title} · ${statusLabel}`}
    >
      <div className="j13-typed-head">
        <div className="j13-typed-head-main">
          <h2 className={`j13-typed-title ${isQuestion ? "is-question" : "is-bounty"}`}>
            {isQuestion ? (
              <CircleHelp size={16} strokeWidth={2.25} aria-hidden />
            ) : (
              <Coins size={16} strokeWidth={2.25} aria-hidden />
            )}
            {title}
          </h2>
          <span className="badge-status badge-status-solved shrink-0">{statusLabel}</span>
        </div>
      </div>

      <div className="j13-accepted-answer__author">
        <span className="j13-accepted-answer__chip">
          <CheckCircle2 size={12} strokeWidth={2.25} aria-hidden />
          {answerLabel}
        </span>
        {author ? (
          <>
            <Link href={`/u/${author.id}`} className="shrink-0" aria-label={name}>
              <Avatar name={name} src={author.avatar || undefined} size={32} />
            </Link>
            <div className="min-w-0 flex flex-col gap-0.5">
              <Link
                href={`/u/${author.id}`}
                className="truncate text-[13.5px] font-semibold hover:text-[var(--accent)] transition-colors"
                style={{ color: "var(--ink)" }}
              >
                {name}
              </Link>
              <p className="meta text-[12px] flex items-center gap-1.5 flex-wrap !mb-0">
                <time dateTime={answer.created_at}>
                  {new Date(answer.created_at).toLocaleString("zh-CN")}
                </time>
                {answer.floor > 0 && (
                  <>
                    <span aria-hidden>·</span>
                    <a
                      href={`#comment-${answer.id}`}
                      className="hover:underline"
                      style={{ color: "var(--accent)" }}
                    >
                      #{answer.floor}
                    </a>
                  </>
                )}
              </p>
            </div>
          </>
        ) : (
          <div className="min-w-0 flex flex-col gap-0.5">
            <p className="meta text-[12px] flex items-center gap-1.5 flex-wrap !mb-0">
              <time dateTime={answer.created_at}>
                {new Date(answer.created_at).toLocaleString("zh-CN")}
              </time>
              {answer.floor > 0 && (
                <>
                  <span aria-hidden>·</span>
                  <a
                    href={`#comment-${answer.id}`}
                    className="hover:underline"
                    style={{ color: "var(--accent)" }}
                  >
                    #{answer.floor}
                  </a>
                </>
              )}
            </p>
          </div>
        )}
      </div>

      <div className="j13-accepted-answer__body">
        {answer.deleted ? (
          <>
            <p className="meta text-[14px]" style={{ color: "var(--ink-3)" }}>
              该答案已被删除
            </p>
            {answer.content ? (
              <div className="mt-2">
                <MarkdownBody content={answer.content} className="prose-content prose-comment" />
              </div>
            ) : null}
          </>
        ) : (
          <MarkdownBody content={answer.content} className="prose-content prose-comment" />
        )}
      </div>

      <div className="j13-typed-foot">
        <span className="j13-typed-foot-status">
          <CheckCircle2 size={14} strokeWidth={2.25} aria-hidden />
          {isQuestion ? "已采纳答案" : "悬赏已发放"}
        </span>
        {endLabel ? (
          <span className="j13-typed-foot-time">结束时间: {endLabel}</span>
        ) : null}
      </div>
    </section>
  );
}

function formatEndsAt(iso?: string) {
  if (!iso) return "";
  try {
    return new Date(iso).toLocaleString("zh-CN");
  } catch {
    return iso;
  }
}