#!/usr/bin/env node
// readability.mjs — Parse HTML with Mozilla Readability.
//
// Input: HTML on stdin
// Args: --url <url> (required, used by Readability for relative URL resolution)
// Output: JSON on stdout with title, author, content, excerpt, siteName, length
//
// Exit code 0 = success, 1 = parse failure or error.

import { Readability } from "@mozilla/readability";
import { JSDOM } from "jsdom";
import { readFileSync } from "node:fs";

const args = process.argv.slice(2);
const urlIdx = args.indexOf("--url");
const url = urlIdx !== -1 ? args[urlIdx + 1] : "https://example.com";

const html = readFileSync("/dev/stdin", "utf-8");

try {
  const dom = new JSDOM(html, { url });
  const reader = new Readability(dom.window.document);
  const article = reader.parse();

  if (!article) {
    process.stdout.write(JSON.stringify({ error: "readability_failed" }));
    process.exit(1);
  }

  process.stdout.write(
    JSON.stringify({
      title: article.title || null,
      author: article.byline || null,
      content: article.textContent || "",
      excerpt: article.excerpt || null,
      siteName: article.siteName || null,
      length: article.length || 0,
    })
  );
} catch (e) {
  process.stdout.write(JSON.stringify({ error: e.message }));
  process.exit(1);
}