// ==UserScript==
// @name              国家中小学智慧教育平台助手
// @namespace         github.com/hmjz100
// @version           0.6
// @description       一个基于 JavaScript 的国家中小学智慧教育平台教材免登录下载地址获取工具，美化页面
// @author            hmjz100
// @match             *://basic.smartedu.cn/*
// @match             *://*.zxx.edu.cn/*
// @icon              https://basic.smartedu.cn/favicon.ico
// @license           MIT
// @grant             GM_getResourceText
// @require           https://unpkg.com/jquery@3.6.3/dist/jquery.min.js
// @require           https://unpkg.com/sweetalert2@11/dist/sweetalert2.all.min.js
// @resource Swal     https://unpkg.com/sweetalert2@11/dist/sweetalert2.min.css
// @resource SwalDark https://unpkg.com/@sweetalert2/theme-dark@5.0.15/dark.min.css
// ==/UserScript==

(function BasicEduDownload() {
	'use strict';

	/*
	防止代码因其他原因被执行多次
	这段代码出自 Via轻插件，作者谷花泰
	*/
	let key = encodeURIComponent('（改）B站成分检测器:主代码');
	if (window[key]) return;
	window[key] = true;
	console.log("【国家中小学智慧教育平台助手】即时\n运行中…")
	addDownStyle();

	let contentType = new URL(location.href).searchParams.get("contentType") || '';
	let contentId = new URL(location.href).searchParams.get("contentId") || '';

	// 默认收起侧栏
	waitForKeyElements('[class^="index-module_collapse_"]', (element) => {
		element.click();
	}, true)

	if (/^\/tchMaterial\/detail/.test(location.pathname)) {
		// 点击取消按钮
		waitForKeyElements('button[type="button"].fish-btn[style]', (element) => {
			element.click();
		})
		if (contentType === 'assets_document' && contentId) {
			let url = Promise.any(["1","2","3"].map(base => fetch(`https://s-file-${base}.ykt.cbern.com.cn/zxx/ndrv2/resources/tch_material/details/${contentId}.json`)
				.then(response => {
					if (!response.ok) {
						throw new Error('请求失败');
					}
					return response.json();
				})
				.then(data => {
					console.log(data)
					let bookInfo = {
						id: data.id,
						title: data.global_title['zh-CN'],
						cover: data.custom_properties.thumbnails[0],
						url: `https://r${base}-ndr.ykt.cbern.com.cn/edu_product/esp/assets/${contentId}.pkg/pdf.pdf`,
					};
					return bookInfo;
				})
				.catch(error => {
					console.error('【国家中小学智慧教育平台助手】\n获取数据时发生错误:', error);
				})
			));

			url.then(async data => {
				console.log(data);
				waitForKeyElements("iframe#pdfPlayerFirefox[src]", (element) => {
					let iframe = element[0];
					let url = new URL(iframe.src);
					url.searchParams.set("file", data.url);
					iframe.src = url.toString();
				}, true)
				let dialog = await Swal.fire({
					title: data.title,
					imageUrl: data.cover,
					imageHeight: 300,
					allowOutsideClick: false,
					showCloseButton: true,
					showDenyButton: true,
					confirmButtonText: '跳转',
					heightAuto: false,
					scrollbarPadding: false,
					denyButtonText: '关闭',
					html: `<div>点击“跳转”后将在新标签页打开PDF链接<br>部分浏览器支持点击按钮后支持直接预览教材<br>(加载预览速度较慢)<br>如果支持预览请耐心等待加载完成<br>加载完成后会出现“下载”图标按钮<br>关闭此窗口后在本页也许可以预览PDF</div>
				`
				});
				if (dialog.isConfirmed) {
					window.open(data.url, "_blank")
				}
			}).catch(error => {
				console.error('【国家中小学智慧教育平台助手】\n获取数据时发生错误:', error);
				message.error('发生错误，此教材无法获取' + error)
			});
		}
	}

	// 移除顶部广告
	waitForKeyElements('[class^="index-module_download"]', (element) => {
		element.remove()
	}, true)

	waitForKeyElements('[class^="index-module_menu-container_"]', (element) => {
		var timebar = $('<div class="index-module_tip"><img src="/img/wenxintishi.67f17cbe.png?x-bce-process=image/format,f_auto"/><span id="basicEduGreeting"></span>，现在是<span id="basicEduTime"></span>感谢您使用本脚本~</div>')
		if (element && element.length > 0) {
			element.after(timebar)
		}
	}, true)

	waitForKeyElements('#zxxcontent', (element) => {
		var poembar = $('<div class="index-module_tip"><img src="/img/wenxintishi.67f17cbe.png?x-bce-process=image/format,f_auto"/><span id="todayPoem"></span></div>')
		if (element && element.length > 0) {
			let text = poembar.find("#todayPoem")
			element.after(poembar)
			text.on('click', () => {
				if (text[0].innerText === "加载中……") return;
				text[0].innerText = "加载中……"
				text.css({ "cursor": "default" });
				Poem(text)
			})
			text[0].innerText = "加载中……"
			text.css({ "cursor": "default" });
			Poem(text)
		}
	}, true)

	window.setInterval(() => {
		var time = document.getElementById('basicEduTime');
		var greeting = document.getElementById('basicEduGreeting');
		if (time && greeting) {
			time.innerText = Time();
			greeting.innerText = Greeting();
		}
	}, 500);

	var toast = Swal.mixin({
		toast: true,
		position: 'bottom-end',
		showConfirmButton: false,
		timer: 3500,
		timerProgressBar: true,
		showCloseButton: true,
		didOpen: (toast) => {
			toast.addEventListener('mouseenter', Swal.stopTimer);
			toast.addEventListener('mouseleave', Swal.resumeTimer);
		}
	});

	var message = {
		success: function (text) {
			toast.fire({ html: text, icon: 'success' });
		},
		error: function (text) {
			toast.fire({ html: text, icon: 'error' });
		},
		warning: function (text) {
			toast.fire({ html: text, icon: 'warning' });
		},
		info: function (text) {
			toast.fire({ html: text, icon: 'info' });
		},
		question: function (text) {
			toast.fire({ html: text, icon: 'question' });
		}
	};

	function Time() {
		function repair(i) {
			if (i >= 0 && i <= 9) {
				return "0" + i;
			} else {
				return i;
			}
		}
		var date = new Date();
		var year = date.getFullYear();
		var month = repair(date.getMonth() + 1);
		var day = repair(date.getDate());
		var hours = repair(date.getHours());
		var minute = repair(date.getMinutes());
		var second = repair(date.getSeconds());

		var curTime = year + "年 - " + month + "月 - " + day + "日 " + hours + "时 : " + minute + "分 : " + second + "秒";
		return curTime;
	}

	function Greeting() {
		var date = new Date();
		var hour = date.getHours();
		var greeting = '';

		if (hour >= 0 && hour <= 10) {
			greeting = '早上好';
		} else if (hour > 10 && hour <= 14) {
			greeting = '中午好';
		} else if (hour > 14 && hour <= 18) {
			greeting = '下午好';
		} else if (hour > 18 && hour <= 24) {
			greeting = '晚上好';
		}
		return greeting;
	}

	function Poem(element) {
		fetch('https://v1.hitokoto.cn/?c=i')
			.then(response => response.json()) // 转换响应为 JSON 格式
			.then(data => {
				// 使用数据更新页面元素
				element[0].innerText = `「${data.hitokoto}」${data.from_who || ""}`;
				element.css({ "cursor": "pointer" });
			})
			.catch(error => {
				// 处理错误情况
				console.error('获取诗词时发生错误:', error);
				element.innerText = '诗词加载失败';
			});
	}

	function addStyle(id, tag, css) {
		tag = tag || 'style';
		let doc = document, styleDom = doc.getElementById(id);
		if (styleDom) styleDom.remove();
		let style = doc.createElement(tag);
		style.rel = 'stylesheet';
		style.id = id;
		tag === 'style' ? style.innerHTML = css : style.href = css;
		doc.getElementsByTagName('body')[0].appendChild(style);
	}

	function addDownStyle() {
		let color = "#1e62ec";
		let swalcss = `
			.swal2-loader{display:none;align-items:center;justify-content:center;width:2.2em;height:2.2em;margin:0 1.875em;-webkit-animation:swal2-rotate-loading 1.5s linear 0s infinite normal;animation:swal2-rotate-loading 1.5s linear 0s infinite normal;border-width:.25em;border-style:solid;border-radius:100%;border-color:${color} transparent ${color} transparent }
			.swal2-styled.swal2-confirm{border:0;border-radius:.25em;background:initial;background-color:${color};color:#fff;font-size:1em}
			.swal2-styled.swal2-confirm:focus{box-shadow:0 0 0 3px ${color}80 }
			.swal2-timer-progress-bar{width:100%;height:.25em;background:${color}33 }
			.swal2-progress-steps .swal2-progress-step{z-index:20;flex-shrink:0;width:2em;height:2em;border-radius:2em;background:${color};color:#fff;line-height:2em;text-align:center}
			.swal2-progress-steps .swal2-progress-step.swal2-active-progress-step{background:${color} }
			.swal2-progress-steps .swal2-progress-step-line{z-index:10;flex-shrink:0;width:2.5em;height:.4em;margin:0 -1px;background:${color}}
		`
		let css = `
			[class^="index-module_header-wrap_"] [class^="index-module_header"] .theme-menu-normal {
				/*height: 95px !important;*/
				height: auto !important;
			}
			
			[class^="index-module_header-wrap_"] [class^="index-module_header"] .theme-menu-sticky {
				height: auto !important;
				-webkit-backdrop-filter: blur(15px);
				backdrop-filter: blur(15px);
				background: rgba(255, 255, 255, 0.8);
			}
			
			.index-module_tip {
				cursor: default;
				text-align: center;
				display: inline-flex;
				justify-content: center;
				margin: 10px 0;
				width: 100%;
			}

			.index-module_tip img {
				margin-right: 5px;
				width: 20px;
				height: 20px;
			}

			#basicEduTime{
				margin: 0 5px;
				color: ${color};
			}
		`;
		// 先监听颜色方案变化 SweetAlert2-Default
		window.matchMedia('(prefers-color-scheme: dark)').addListener((e) => {
			if (e.matches) {
				// 切换到暗色主题
				addStyle('swal-pub-style', 'style', GM_getResourceText('SwalDark'));
			} else {
				// 切换到浅色主题
				addStyle('swal-pub-style', 'style', GM_getResourceText('Swal'));
			}
			addStyle('SweetAlert2-User', 'style', swalcss);
		});

		// 再修改主题 SweetAlert2-Default
		if (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches) {
			// 切换到暗色主题
			addStyle('swal-pub-style', 'style', GM_getResourceText('SwalDark'));
		} else {
			// 切换到浅色主题
			addStyle('swal-pub-style', 'style', GM_getResourceText('Swal'));
		}
		addStyle('SweetAlert2-User', 'style', swalcss);
		addStyle('BasicSmartEdu-User', 'style', css);
	}

	function waitForKeyElements(selectorTxt, actionFunction, bWaitOnce, iframeSelector) {
		var targetbadges, btargetsFound;
		if (typeof iframeSelector == "undefined")
			targetbadges = $(selectorTxt);
		else
			targetbadges = $(iframeSelector).contents()
				.find(selectorTxt);
		if (targetbadges && targetbadges.length > 0) {
			btargetsFound = true;
			targetbadges.each(function () {
				var jThis = $(this);
				var alreadyFound = jThis.data('alreadyFound') || false;
				if (!alreadyFound) {
					var cancelFound = actionFunction(jThis);
					if (cancelFound) {
						btargetsFound = false;
					} else {
						jThis.data('alreadyFound', true);
					}
				}
			});
		} else {
			btargetsFound = false;
		}
		var controlObj = waitForKeyElements.controlObj || {};
		var controlKey = selectorTxt.replace(/[^\w]/g, "_");
		var timeControl = controlObj[controlKey];
		if (btargetsFound && bWaitOnce && timeControl) {
			clearInterval(timeControl);
			delete controlObj[controlKey]
		} else {
			if (!timeControl) {
				timeControl = setInterval(function () {
					waitForKeyElements(selectorTxt, actionFunction, bWaitOnce, iframeSelector);
				}, 500);
				controlObj[controlKey] = timeControl;
			}
		}
		waitForKeyElements.controlObj = controlObj;
	}
})();