// ==UserScript==
// @name         Duolingo Search
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  A tiny tool making for duolingo exercises better.
// @author       Lepturus
// @match        *://*.duolingo.com/l*
// @match        *://*.duolingo.cn/l*
// @match        *://*.duolingo.com/skill*
// @match        *://*.duolingo.cn/skill*
// @license MIT
// @icon         https://d35aaqx5ub95lt.cloudfront.net/images/duolingo-touch-icon2.png
// @grant        none
// @downloadURL none
// ==/UserScript==

(function () {
    'use strict';

    function copy(e, isHTML = true) {
        let obj = document.createElement('input');
        document.body.appendChild(obj);
        obj.value = isHTML ? e.innerText : e;
        obj.select();
        document.execCommand('copy', false);
        obj.remove();
    }

    function Duolingo() {
        let kws = document.querySelector('div[dir="ltr"]');let txt="";

        if (kws) {
            let cont = kws.parentNode;
            let goGoogle = document.createElement("span");
            if (kws.querySelector('ruby')){
                kws.querySelectorAll('ruby rb div').forEach(function(tp){
                    txt += tp.innerText;
                })
            }
            else{
            txt = kws.innerText
            }
            let goUrl = `https://www.google.com/search?q=${txt}%20site%3Aduolingo.com&ie=utf-8`
            let goTranslate = `https://translate.google.com/?hl=en&sl=auto&tl=en&text=${txt}`
            goGoogle.innerHTML =
                `<a href="${goUrl}" target="_blank">Google</a> <a href="${goTranslate}" target="_blank">Translation</a>  <button id ="copyText" style="background: none!important;border: none;padding: 0!important;">Copy it</button>`;
            if (!cont.textContent.match("Google")) {
                cont.appendChild(goGoogle);
            }
            let cpy = document.getElementById("copyText");
            cpy.onclick = function () {
                copy(txt,false);
                cpy.innerText = "Copied";
                window.setTimeout(function () {
                    cpy.innerText = "Copy it"
                }, 1500);
            }
        }
    }
    if (/duolingo/.test(document.URL)) {
        setInterval(Duolingo, 1500);
    }
})();