// ==UserScript==
// @name         得到PC版工具箱 - 黑夜模式
// @namespace    http://playeruu.com
// @version      0.3
// @description  用于实现得到PC版的黑夜模式
// @author       arronkler
// @match        https://www.biji.com/*
// @grant        none
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // Your code here...

    var doc = document;
    var qa = document.querySelectorAll.bind(doc);
    var q = document.querySelector.bind(doc);

    var bgMain = '#333';
    var colorMain = '#fff';
    var body = doc.body;
    body.style.background = bgMain;
    body.style.color = colorMain;

    function setStyle(queries, callback) {
        queries.forEach(function (elem) {
            callback(elem);
        });
    }

    function injectStyle() {
        var styleFragment = document.createElement('style');
        var content = '';

        // 设置字体颜色
        setStyle(
            ['.iget-common-c1',
             '.iget-search-control button',
             '.introduce-tab',
             '.tab-active',
             '.content-tab',
             '.intro-content',
             'dd.message-user-post'
            ], function (item) {
                content += (item + ' {color: ' + colorMain +' !important;}');
            });

        // 设置背景色
        setStyle([
            '.iget-course-header',
            '.iget-common-b9',
            '.pc-main',
            '.iget-common-b7',
            '.course-recommend',
            '.tab-head',
            '.filter',
            '.course-nav',
            '.message-v2',
            '.course-module li',
            '.chapter-mod',
            '.course-info',
            '.course-bookends',
            'figure'
        ], function (item) {
            content += (item + ' {background: ' + bgMain +' !important;}');
        });

        styleFragment.innerHTML = content;

        document.body.appendChild(styleFragment);
    }

    injectStyle();
})();