import "./disqus";
import "./app.scss";

window.addEventListener("keydown", (ev) => {
  if (ev.key === "s") {
    const s = window.getSelection().toString();
    if (s) {
      speak(s);
    }
  }
});

window.onload = () => {
  for (const a of Array.from(document.getElementsByTagName("a"))) {
    const href = a.href;
    console.log(href);
    const m = /^slide:github:([^/]+)\/([^/]+)\/(.+)$/.exec(href);
    if (m) {
      const url = new URL("https://reveal-md.herokuapp.com/");
      url.searchParams.append("q", `https://raw.githubusercontent.com/${m[1]}/${m[2]}/master/src/resources/${m[3]}`);
      a.href = url.href;
    }
  }
}

function speak(s: string) {
  const allVoices = speechSynthesis.getVoices();
  let vs = allVoices.filter((v) => /zh[-_]cn/i.test(v.lang));
  if (vs.length === 0) {
    vs = allVoices.filter((v) => /zh/i.test(v.lang));
  }

  if (vs.length > 0) {
    const u = new SpeechSynthesisUtterance(s);
    u.lang = vs[0].lang;
    u.rate = 0.8;
    speechSynthesis.speak(u);
  }
}