// ==UserScript==
// @name        CCNA Autofill
// @namespace   Violentmonkey Scripts
// @match       *://assessment.netacad.net/*
// @match       *://www.assessment.netacad.net/*
// @match       *://www.google.com/*
// @match       *://www.google.de/*
// @require     https://git.euph.dev/SZUT-Dominik/CCNA_Autofill_Userscript/raw/branch/main/fetch.user.js
// @grant       GM_setValue
// @grant       GM_getValue
// @grant       GM_xmlhttpRequest
// @grant       GM_log
// @version     0.0.8
// @author      Dominik Säume
// ==/UserScript==
window.hello();


const URL_STORAGE_KEY = "itexamanswers.net URL";
let awnserData;

console.log = console.__proto__.log;

window.addEventListener("keydown", event => {
  switch(event.key){
    case "p":
        const oldAwnsersURL = GM_getValue(URL_STORAGE_KEY);
        let newAwnsersURL = prompt("Please input the answer url (itexamanswers.net)", oldAwnsersURL);
        GM_setValue(URL_STORAGE_KEY, newAwnsersURL);
        awnserData = await window.fetchAwnsers(newAwnsersURL);
        break;

    case "n":
        document.getElementById("next").click();
        break;

    case "a":
        awnserQuestion();
        break;
  }
})

function awnserQuestion(){
    const question = document.querySelector(".question:not(.hidden)");
    if (!question) {
        return;
    }

    const questionTextDom = question.querySelector(".questionText .mattext");
    if (!questionTextDom) return;
    const questionText = questionTextDom.textContent.trim();

    const answersDom = question.querySelector("ul.coreContent");
    if (!answersDom) return;
    const answers = answersDom.children;

    for (let answer of answers) {
        const input = answer.querySelector("input");
        if (!input) continue;
        input.checked = false;
    }

    const correctAnswers = findAnswers(questionText, answers);
    if (correctAnswers.length === 0) {
        GM_log("no awnser")
        return;
    }

    for (const answer of correctAnswers) {
        const input = answer.querySelector("input");
        if (!input) continue;
        input.checked = true;
    }
}

function findAnswers(questionText, answers) {
    if (awnserData === null) {
        alert("No chapter data loaded. Maybe the fetch failed?!");
        return [];
    }

    const correctAnswers = [];
    for (let entry of awnserData) {
        if (matchAwnser(questionText.trim(), entry.question.trim())) {
            for (let availableAnswer of answers) {
                for (let possibleAnswer of entry.answers) {
                    if (matchAwnser(availableAnswer.textContent.trim(), possibleAnswer)) {
                        correctAnswers.push(availableAnswer);
                    }
                }
            }
        }
    }

    return correctAnswers;
}

function matchAwnser(textA, textB) {
    const replaceRegex = /[^\w]/gi;
    textA = textA.replace(replaceRegex, "");
    textB = textB.replace(replaceRegex, "");
    return (textA === textB);
}