import type { ReactNode } from "react";
import type { Components } from "react-markdown";
import { renderMarkdownToReact } from "@/components/markdown/renderMarkdown";
import { splitContentSegments } from "@/lib/directiveBlocks";
import { expandDyEmojiShortcodes } from "@/lib/dyEmoji";
import type { HideKind } from "@/lib/hideBlocks";
import MdHideBlock from "@/components/markdown/MdHideBlock";
import MdTimeline from "@/components/markdown/MdTimeline";
import MdEntries from "@/components/markdown/MdEntries";
import MdDetails from "@/components/markdown/MdDetails";
import MdVideo from "@/components/markdown/MdVideo";

type MarkdownBodyProps = {
  content: string;
  className?: string;
  components?: Components;
  /** 详情页解锁门禁需要 */
  postId?: number;
  /** 登录跳转（公告等无 postId 时） */
  loginHref?: string;
  loggedIn?: boolean;
  /** 书级「全章节条目卡模式」：章节内容免写 [entries] 壳 */
  entriesAuto?: boolean;
  /** 按分段索引的条目标题锚点 id（与章内目录共享；阅读页传入，其他场景缺省） */
  entriesTitleIds?: (string[] | undefined)[];
};

/**
 * 站点统一 Markdown 渲染（服务端）：GFM + Shiki；支持 [hide] / [timeline] / [entries]。
 */
export default async function MarkdownBody({
  content,
  className = "prose-content",
  components,
  postId,
  loginHref,
  loggedIn = false,
  entriesAuto = false,
  entriesTitleIds,
}: MarkdownBodyProps) {
  const segs = splitContentSegments(expandDyEmojiShortcodes(content || ""), {
    entriesAuto,
  });
  const nodes = [];
  for (let i = 0; i < segs.length; i++) {
    const seg = segs[i];
    if (seg.type === "md") {
      if (!seg.text.trim()) continue;
      nodes.push(
        <div key={`md-${i}`}>{await renderMarkdownToReact(seg.text, components)}</div>
      );
      continue;
    }
    if (seg.type === "timeline") {
      const bodies: ReactNode[] = [];
      for (let j = 0; j < seg.items.length; j++) {
        const it = seg.items[j];
        if (!it.body.trim()) {
          bodies.push(null);
          continue;
        }
        // 条目正文不挂目录 id，避免与块外 headingRenderer 错位
        bodies.push(await renderMarkdownToReact(expandDyEmojiShortcodes(it.body)));
      }
      nodes.push(
        <MdTimeline
          key={`tl-${i}`}
          items={seg.items}
          renderBody={(_it, idx) => bodies[idx]}
        />
      );
      continue;
    }
    if (seg.type === "entries") {
      nodes.push(
        <MdEntries key={`entries-${i}`} items={seg.items} titleIds={entriesTitleIds?.[i]} />
      );
      continue;
    }
    if (seg.type === "details") {
      const inner = seg.body.trim()
        ? await renderMarkdownToReact(expandDyEmojiShortcodes(seg.body))
        : null;
      nodes.push(
        <MdDetails key={`details-${i}`} title={seg.title}>
          {inner}
        </MdDetails>
      );
      continue;
    }
    if (seg.type === "video") {
      nodes.push(<MdVideo key={`video-${i}`} provider={seg.provider} id={seg.id} />);
      continue;
    }
    const kind = seg.kind as HideKind;
    if (seg.locked) {
      nodes.push(
        <MdHideBlock
          key={`hide-${i}`}
          kind={kind}
          points={seg.points}
          locked
          postId={postId}
          loginHref={loginHref}
          loggedIn={loggedIn}
        />
      );
      continue;
    }
    const inner = seg.body.trim()
      ? await renderMarkdownToReact(expandDyEmojiShortcodes(seg.body))
      : null;
    nodes.push(
      <MdHideBlock key={`hide-${i}`} kind={kind} points={seg.points}>
        {inner}
      </MdHideBlock>
    );
  }

  return <div className={className}>{nodes}</div>;
}