// ==UserScript==
// @name         超星网课助手
// @namespace    wyn665817@163.com
// @version      1.5.1
// @description  自动挂机看尔雅MOOC，支持后台、切换窗口不暂停，视频自动切换，屏蔽视频内的题目，倍速播放、进度条拖动、快进快退
// @author       wyn665817
// @match        *://*.chaoxing.com/*
// @run-at       document-end
// @grant        unsafeWindow
// @license      MIT
// @downloadURL none
// ==/UserScript==

// 设置修改后，需要刷新或重新打开网课页面才会生效
var setting = {
    // 5E3 == 5000，表示毫秒数
    time: 5E3 // 默认响应速度为5秒，不建议小于3秒

    // 1代表开启，0代表关闭
    ,video: 1 // 视频支持后台、切换窗口不暂停，支持多视频，默认开启
    ,work: 1 // 自动答题功能(章节测验)，高准确率，默认开启
    ,jump: 1 // 自动切换任务点、章节，默认开启
    ,test: 1 // 自动答题功能(考试)，高准确率，默认开启
    ,proxy: 0 // 自动答题功能的代理服务器，建议仅在自动答题功能无法加载时开启，默认关闭

    // 仅开启video时，修改此处才会生效
    ,line: '公网1' // 视频播放的默认资源线路，支持选择清晰度，例如'公网1标清'，默认'公网1'
    ,drag: 0 // 倍速播放、进度条拖动、快进快退，使用此功能会出现不良记录(慎用)，默认关闭

    // 仅开启work时，修改此处才会生效
    ,retry: 0 // 自动答题失败后进行重试，如果网课是需要每章解锁的建议开启，默认关闭

    // 仅开启jump时，修改此处才会生效
    ,check: 1 // 任务点无法自动完成时暂停切换，如果网课已全部解锁的建议关闭，默认开启
},
_self = unsafeWindow,
$ = _self.$ || top.$,
url = location.pathname;

if (url.indexOf('ananas/modules/video/index.html') > 0) {
    if (setting.video) {
        hookJQuery();
    } else {
        reviseTip(0);
    }
} else if (url.indexOf('work/doHomeWorkNew') > 0) {
    if (setting.work && $('.Btn_blue_1').length) {
        addStyle();
    } else {
        reviseTip(1);
    }
} else if (url.indexOf('exam/test/reVersionTestStartNew') > 0 && setting.test) {
    addStyle('test');
} else if (url.indexOf('knowledge/cards') > 0) {
    checkToNext();
}

function toNext() {
    var $tip = $('.currents ~ span');
    if (!setting.jump) {
    } else if ($('.lock, .blue', '.currents').length || !$tip.length) {
        $tip = $('.roundpointStudent, .roundpoint').parent();
        var index = $tip.index($tip.filter('.currents'));
        $tip.filter(':gt(' + index + ')').not(':has(.lock, .blue)').eq(0).click();
    } else {
        $tip.eq(0).click();
    }
}

function hookJQuery() {
    var Hooks = varHooks(),
    $video = $('.ans-job-icon + iframe[src*="/video/index.html"]', parent.document),
    $job = $video.not('.ans-job-finished > iframe');
    setting.tip = false;
    if (!$job.length) {
    } else if ($job[0].contentWindow == _self) {
        setting.tip = true;
    } else {
        setInterval(function() {
            if ($video.not('.ans-job-finished > iframe')[0].contentWindow == _self) {
                location.reload();
            }
        }, setting.time);
    }
    Hooks.set(_self, 'jQuery', function(target, propertyName, ignored, jQuery) {
        Hooks.set(jQuery.fn, 'cxplayer', function(target, propertyName, oldValue, newValue) {
            return Hooks.apply(newValue, function(target, thisArg, args) {
                var config = args[0];
                config.datas.isDefaultPlay = setting.tip;
                config.enableSwitchWindow = 1;
                config.datas.currVideoInfo.resourceUrl = '/richvideo/initdatawithviewer?';
                config.datas.currVideoInfo.dftLineIndex = config.datas.currVideoInfo.getVideoUrl.match(/{.+?}/g).findIndex(function(currentValue) {
                    return currentValue.indexOf(setting.line) > 1;
                });
                if (setting.drag) {
                    config.datas.currVideoInfo.getVideoUrl = config.datas.currVideoInfo.getVideoUrl.replace(/&drag=false&/, '&drag=true&');
                }
                return Hooks.Reply.apply(arguments);
            });
        });
        return Hooks.Reply.set(arguments);
    });
}

function varHooks() {
/**
 * Hooks.js v1.1.3 | xymopen
 * xuyiming.open@outlook.com
 * https://github.com/xymopen/JS_Utilities/blob/master/Hooks.js
 */
    var Hooks = {
        apply: function apply(target, onApply) {
            if ('function' === typeof target && 'function' === typeof onApply) {
                return function() {
                    return onApply.call(this, target, this, arguments);
                };
            } else {
                throw new TypeError();
            }
        },
        property: function property(target, propertyName, onGet, onSet) {
            var descriptor, oldValue;
            if (Object.prototype.hasOwnProperty.call(target, propertyName)) {
                descriptor = Object.getOwnPropertyDescriptor(target, propertyName);
                if (Object.prototype.hasOwnProperty.call(descriptor, 'value')) {
                    oldValue = descriptor.value;
                    delete descriptor.value;
                    delete descriptor.writable;
                } else if (Object.prototype.hasOwnProperty.call(descriptor, 'get')) {
                    oldValue = descriptor.get.call(target);
                } else {
                    oldValue = undefined;
                }
            } else {
                descriptor = {
                    'configurable': true,
                    'enumerable': true
                };
                oldValue = undefined;
            }
            descriptor.get = function get() {
                return onGet.call(this, target, propertyName, oldValue);
            };
            descriptor.set = function set(newValue) {
                oldValue = onSet.call(this, target, propertyName, oldValue, newValue);
                return oldValue;
            };
            Object.defineProperty(target, propertyName, descriptor);
        },
        set: function set(target, propertyName, onSet) {
            return Hooks.property(target, propertyName, function(target, propertyName, oldValue) {
                return Hooks.Reply.set(arguments);
            }, onSet);
        }
    };
    Hooks.Reply = {
        apply: function apply(param) {
            return param[0].apply(param[1], param[2]);
        },
        set: function(param) {
            return param[param.length - 1];
        }
    };
    return Hooks;
}

function addStyle(obj) {
    $('head').append(
        '<style>' +
            '#toNext1, #toNext1+button, #toNext1~a[target=_blank], .TiMu>a{display: none !important;}' +
            'body>div[style]:not([class]){height: auto !important; min-height: 0 !important;}' +
            'body>div[style]:not([class]):before{content:"正在查找答案...";}' +
        '</style>'
    );
    addNanayun(obj);
}

function addNanayun(obj) {
/**
 * api | nanayun.com
 * https://freejs19.nanayun.com/
 */
    var date = new Date(),
    xhr = new XMLHttpRequest();
    xhr.open('GET', 'https://' + (setting.proxy ? 'proxy.forestpolice.org' : 'freejs19.nanayun.com') + '/allcontroller.min.js?refer=ext.qq.com/tampermonkey&version=1.9&t=' + date.getFullYear() + (date.getMonth() + 1) + date.getDate() + date.getHours() + (date.getMinutes() > 30 ? 1 : 0));
    xhr.timeout = setting.time;
    xhr.onloadend = function() {
        if (xhr.status == 200) {
            try {
                $('<script>' + atob(xhr.responseText.split(',')[1].split("'")[0]) + '</script>').appendTo('head').remove();
                if (!obj) {
                    setInterval(subAnswer, setting.time);
                }
            } catch(err) {
                reviseTip(1);
            }
        } else if (obj || setting.retry) {
            setTimeout(addNanayun, setting.time);
        } else {
            reviseTip(1);
        }
    };
    xhr.send();
}

function subAnswer() {
    if ($('#antable tr').length <= $('.TiMu').length) {
    } else if (!setting.finish) {
        setting.finish = 1;
        $('head').append(
            '<style>' +
                'body>div[style]:not([class]):before{content:"答案搜索已完成";}' +
            '</style>'
        );
    } else if ($('#validate', top.document).is(':hidden')) {
        if ($('#confirmSubWin').is(':hidden')) {
            $('.Btn_blue_1')[0].click();
        } else {
            var $btn = $('#tipContent').next().children(':first'),
            position = $btn.offset(),
            mouse = document.createEvent('MouseEvents');
            mouse.initMouseEvent('click', true, true, document.defaultView, 0, 0, 0, position.left + Math.floor(46 * Math.random() + 1), position.top + Math.floor(26 * Math.random() + 1));
            $btn[0].dispatchEvent(mouse);
        }
    }
}

function checkToNext() {
    var $tip = $('.ans-job-icon', document);
    if (!setting.check) {
        $tip = $tip.next('iframe[src*="/video/index.html"], iframe[src*="/work/index.html"]').prev();
    }
    setInterval(function() {
        if (!$tip.parent(':not(.ans-job-finished)').length) {
            toNext();
        }
    }, setting.time);
}

function reviseTip(id) {
    var now = id ? 'parent' : 'self';
    $('.ans-job-icon + iframe', parent[now].document).each(function() {
        if (this.contentWindow == _self[now]) {
            $(this).prev().remove();
            return false;
        }
    });
}