// ==UserScript==
// @name         UOOC Answer Tester
// @name:en      UOOC Answer Tester
// @namespace    http://tampermonkey.net/
// @version      0.1.0
// @description  【使用前先看介绍/有问题可反馈】【欢迎一键三连(好评+打赏+收藏)，你的支持是作者维护下去的最大动力！】UOOC Answer Tester（UOOC 答案测试器）：测试 UOOC 单选题答案.
// @description:en  【使用前先看介绍/有问题可反馈】【欢迎一键三连(好评+打赏+收藏)，你的支持是作者维护下去的最大动力！】UOOC Answer Tester（UOOC 答案测试器）：测试 UOOC 单选题答案.
// @author       cc
// @match        http://www.uooc.net.cn/*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';
    window.AnswerTester = {};
    function setOption(option) {
        let questions = frames[0].document.querySelector('.queItems');
        if (typeof option === 'string') {
            for (let i = 1; i < questions.children.length; i++) {
                let options = questions.children[i].querySelectorAll('input');
                options[option.charCodeAt() - 'A'.charCodeAt()].click();
            }
        } else {
            for (let i = 1; i < questions.children.length; i++) {
                let options = questions.children[i].querySelectorAll('input');
                options[option[i - 1].charCodeAt() - 'A'.charCodeAt()].click();
            }
        }
    };
    function getOption() {
        let questions = frames[0].document.querySelector('.queItems');
        let right = [];
        for (let i = 1; i < questions.children.length; i++) {
            let score = questions.children[i].querySelector('.scores span').innerHTML;
            let pattern = /\d+\.?\d*/g;
            score = parseFloat(pattern.exec(score)[0]);
            right.push(Boolean(score > 0));
        }
        return right;
    };
    function findOption(rights) {
        let questionCount = rights[0].length;
        let optionCount = rights.length;
        let answer = [];
        for (let i = 0; i < questionCount; i++) {
            for (let j = 0; j < optionCount; j++) {
                if (rights[j][i]) {
                    answer[i] = String.fromCharCode('A'.charCodeAt() + j);
                    break;
                }
            }
        }
        return answer;
    };
    function main() {
        // copy and execute the following code
        AnswerTester.setOption('A');
        // when you have submitted your answers, please copy and execute the following code
        let r1 = AnswerTester.getOption();
        // copy and execute the following code
        AnswerTester.setOption('B');
        // when you have submitted your answers, please copy and execute the following code
        let r2 = AnswerTester.getOption();
        // copy and execute the following code
        AnswerTester.setOption('C');
        // when you have submitted your answers, please copy and execute the following code
        let r3 = AnswerTester.getOption();
        // copy and execute the following code
        AnswerTester.setOption('D');
        // when you have submitted your answers, please copy and execute the following code
        let r4 = AnswerTester.getOption();
        // please copy and execute the following code
        let r = [r1, r2, r3, r4];
        let answer = AnswerTester.findOption(r);
        AnswerTester.setOption(answer);
        // now you can submit your answers
    };
    window.AnswerTester = {
        setOption: setOption,
        getOption: getOption,
        findOption: findOption,
        main: main,
    };
})();