// ==UserScript==
// @name         升学 E 网通 (EWT360) 试卷自动完成 (选择题)
// @namespace    http://tampermonkey.net/
// @version      0.3
// @description  一键完成 E 网通试卷选择题 | Auto Complete EWT
// @author       yzxoi
// @match        https://web.ewt360.com/mystudy*
// @match        http://web.ewt360.com/mystudy*
// @grant        none
// @downloadURL https://update.greasyfork.icu/scripts/428775/%E5%8D%87%E5%AD%A6%20E%20%E7%BD%91%E9%80%9A%20%28EWT360%29%20%E8%AF%95%E5%8D%B7%E8%87%AA%E5%8A%A8%E5%AE%8C%E6%88%90%20%28%E9%80%89%E6%8B%A9%E9%A2%98%29.user.js
// @updateURL https://update.greasyfork.icu/scripts/428775/%E5%8D%87%E5%AD%A6%20E%20%E7%BD%91%E9%80%9A%20%28EWT360%29%20%E8%AF%95%E5%8D%B7%E8%87%AA%E5%8A%A8%E5%AE%8C%E6%88%90%20%28%E9%80%89%E6%8B%A9%E9%A2%98%29.meta.js
// ==/UserScript==

(function() {
    'use strict';
    var reportId;
    function getQueryVariable(variable){
        var query = window.location.href;
        query = query.substring(query.indexOf("?") + 1);
        var vars = query.split("&");
        for (var i=0;i<vars.length;i++) {
            var pair = vars[i].split("=");
            if(pair[0] == variable){return pair[1];}
        }
        return(false);
    }
    function error(){
        alert("错误了");
    }
    if (window.location.href.indexOf("exam/answer") != -1){
        $("html").append("<button id='ewt_auto' style='position: fixed;right: 10px;bottom: 10px;font-size: 20px;padding: 10px 20px;border: none;outline: none;background: #5e72e4;color: #fff;border-radius: 5px;box-shadow: 0 2px 5px rgba(0, 0, 0, .2);'>自动做选择题</button>");
    }
    $("#ewt_auto").on("click", function(){
        $("#ewt_auto").css("pointer-events", "none");
        $("#ewt_auto").css("background", "#666");
        getPaperInfo();
    });
    function getPaperInfo(){
        $("#ewt_auto").text("1.获取题目信息中...");
        $.ajax({
            url : "https://web.ewt360.com/customerApi/api/studyprod/web/answer/paper?paperId=" + getQueryVariable("paperId") + "&platform=" + getQueryVariable("platform") + "&bizCode=" + getQueryVariable("bizCode") + "&reportId=0&isRepeat=0",
            type : "GET",
            dataType : "json",
            success : function(result){
                $("#ewt_auto").text("3.自动做题目中...");
                autoCompleteProblems(result.data.questions);
            },
            error : function(xhr){
                error();
            }
        });
    }
    function autoCompleteProblems(probs){
        if (probs == null || probs == undefined){
            return;
        }
        for (let prob of probs){
            autoCompleteProblems(prob.childQuestions);
            if (prob.rightAnswer == null){
                continue;
            }
            let div = $("#ewt-question-" + prob.id);
            $(".option-item", div).each(function(index, item) {//清空所有选项
                if ($(item).hasClass("selected")){
                    $(item).click();
                }
            });
            for (let right of prob.rightAnswer){//选择正确选项
                $(".option-item[data-reactid$='$" + right + "']", div).click();
            }
        }
        $("#ewt_auto").text("完成！");
    }
})();