import fs from "fs";
import path from "path";
import { fileURLToPath } from "url";

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const contentDir = path.join(__dirname, "..", "content", "resources");

const files = fs.readdirSync(contentDir).filter((f) => f.endsWith(".mdx"));

let totalFixed = 0;

for (const file of files) {
  const filePath = path.join(contentDir, file);
  const raw = fs.readFileSync(filePath, "utf-8");

  // Split frontmatter from content
  const fmMatch = raw.match(/^---\n([\s\S]*?)\n---\n([\s\S]*)$/);
  if (!fmMatch) continue;

  const frontmatter = fmMatch[1];
  const content = fmMatch[2];

  const lines = content.split("\n");
  let insideFencedBlock = false;
  let changed = false;
  const result = [];

  for (let line of lines) {
    // Toggle fenced code block state
    if (/^```/.test(line.trimStart())) {
      insideFencedBlock = !insideFencedBlock;
      result.push(line);
      continue;
    }

    if (insideFencedBlock) {
      // Inside fenced code block: unescape HTML entities
      const newLine = line.replace(/&lt;/g, "<").replace(/&gt;/g, ">");
      if (newLine !== line) changed = true;
      result.push(newLine);
    } else {
      // Outside fenced block: fix inline code spans
      const newLine = line.replace(/`[^`]+`/g, (match) => {
        return match.replace(/&lt;/g, "<").replace(/&gt;/g, ">");
      });
      if (newLine !== line) changed = true;
      result.push(newLine);
    }
  }

  if (changed) {
    const output = `---\n${frontmatter}\n---\n${result.join("\n")}`;
    fs.writeFileSync(filePath, output, "utf-8");
    totalFixed++;
    console.log(`Fixed: ${file}`);
  }
}

console.log(`\nDone. Fixed ${totalFixed} files.`);