import yaml from "js-yaml";

export interface DocEntry {
  tag: string;
  icon: string;
  title: string;
  description: string;
  syntax: string;
  props: { name: string; type: string; default?: string; desc: string }[];
  /** Markdown body (everything after frontmatter ---) */
  body: string;
}

/** Splits frontmatter and markdown body from a raw .md string. */
function parseFrontmatter(raw: string): Record<string, unknown> | null {
  // Handle CRLF line endings by normalizing to LF first
  const normalized = raw.replace(/\r\n/g, "\n");
  const match = normalized.match(/^---\n([\s\S]*?)\n---\n?([\s\S]*)$/);
  if (!match) return null;
  try {
    return yaml.load(match[1]) as Record<string, unknown>;
  } catch {
    return null;
  }
}

function getBody(raw: string): string {
  const normalized = raw.replace(/\r\n/g, "\n");
  const match = normalized.match(/^---\n[\s\S]*?\n---\n?([\s\S]*)$/);
  return match ? match[1] : raw;
}

function parseEntry(raw: string): DocEntry | null {
  const fm = parseFrontmatter(raw);
  if (!fm) return null;
  return {
    tag: fm.tag as string,
    icon: fm.icon as string,
    title: fm.title as string,
    description: fm.description as string,
    syntax: fm.syntax as string,
    props: (fm.props as DocEntry["props"]) ?? [],
    body: getBody(raw),
  };
}

// Static imports – each .md file is asset/source so imports are strings.
// Add a new import here when creating a new doc entry.
import mdDiceRaw from "../doc-entries/md-dice.md";
import mdTableRaw from "../doc-entries/md-table.md";
import mdLinkRaw from "../doc-entries/md-link.md";
import mdPinsRaw from "../doc-entries/md-pins.md";
import mdFontRaw from "../doc-entries/md-font.md";
import mdBgRaw from "../doc-entries/md-bg.md";
import mdBorderRaw from "../doc-entries/md-border.md";
import mdEmbedRaw from "../doc-entries/md-embed.md";
import mdDeckRaw from "../doc-entries/md-deck.md";
import mdYarnRaw from "../doc-entries/md-yarn-spinner.md";
import mdTokenRaw from "../doc-entries/md-token.md";
import mdTokenViewerRaw from "../doc-entries/md-token-viewer.md";
import mdCommanderRaw from "../doc-entries/md-commander.md";

const rawDocuments: string[] = [
  mdDiceRaw,
  mdTableRaw,
  mdLinkRaw,
  mdPinsRaw,
  mdFontRaw,
  mdBgRaw,
  mdBorderRaw,
  mdEmbedRaw,
  mdDeckRaw,
  mdYarnRaw,
  mdTokenRaw,
  mdTokenViewerRaw,
  mdCommanderRaw,
];

let _entries: DocEntry[] | null = null;

function loadDocEntries(): DocEntry[] {
  if (_entries) return _entries;
  _entries = rawDocuments.map(parseEntry).filter(Boolean) as DocEntry[];
  _entries.sort((a, b) => a.tag.localeCompare(b.tag));
  return _entries;
}

export const docEntries = loadDocEntries();