// ==UserScript==
// @name         移动百度优化
// @namespace    http://tampermonkey.net/
// @version      0.2
// @description  非百度系浏览器使用百度APP的ua时，会缺少搜索栏和控制栏。本脚本可以改善此情况。
// @author       那年那兔那些事
// @include      *://m.baidu.com/s*
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function() {
	'use strict';

	function getData(key) {
		if (key === "ua") {
			let ua = navigator.userAgent;
			let isMobile = /mobile/i.test(ua);
			let isBaidu = /baidu/i.test(ua);
			return isMobile && isBaidu;
		}
		let ls = location.search;
		if(key==="pd"){
			return /pd=/i.test(ls);
		}
		let searchWord = ls.search("word=") !== -1 ? ls.slice(ls.search("word=") + 5) : "";
		searchWord = searchWord ? decodeURI(searchWord.split("&")[0]) : "";
		let pageIndex = ls.search("pn=") !== -1 ? ls.slice(ls.search("pn=") + 3) : "";
		pageIndex = pageIndex ? pageIndex.split("&")[0] : "";
		pageIndex = pageIndex ? parseInt(1 + parseInt(pageIndex) / 10) : 1;
		let homeUrl = "https://m.baidu.com/s?word=" + searchWord;
		let lastUrl = homeUrl + ((pageIndex - 1) > 1 ? "&pn=" + (pageIndex - 2) * 10 : "");
		let nextUrl = homeUrl + "&pn=" + pageIndex * 10;
		let pcUrl = "https://www.baidu.com/s" + ls;
		switch (key) {
			case "ls":
				return ls;
				break;
			case "word":
				return searchWord;
				break;
			case "home":
				return homeUrl;
				break;
			case "last":
				return lastUrl;
				break;
			case "index":
				return pageIndex;
				break;
			case "next":
				return nextUrl;
				break;
			case "pc":
				return pcUrl;
				break;
			default:
				return [ls, searchWord, homeUrl, lastUrl, pageIndex, nextUrl, pcUrl];
				break;
		}
	}

	function createSearchBar() {
		let extraSearchgBox = document.getElementsByClassName("searchboxtop newsearch-white-style")[0];
		let tabLink = document.getElementsByClassName("se-head-tablink")[0];
		if (!extraSearchgBox && tabLink) {
			extraSearchgBox = document.createElement("div");
			extraSearchgBox.setAttribute("m-service", "searchbox");
			extraSearchgBox.setAttribute("class", "searchboxtop newsearch-white-style");
			extraSearchgBox.setAttribute("style", "padding-top:10px");
			extraSearchgBox.innerHTML =
				"<form data-formposition='t' class='se-form' id='se-form' method='get' autocomplete='off' action='/s'><div><div class='suggest-back' style='display: none;'><i class='c-icon'></i></div><div class='con-wrap new-search-con'><div class='con-inner-left'><div class='se-bearicon'></div><input autocomplete='off' autocorrect='off' maxlength='64' id='kw' name='word' type='search' class='se-input adjust-input' placeholder='输入搜索词' value='" +
				getData("word") +
				"' data-sug='1'><div id='cross' class='cross' style='display: none;'></div></div><button id='se-bn' class='se-bn' type='submit'><span>百度一下</span></button></div></div></form><div class='searchboxtop-bg-fade'></div>";
			tabLink.parentElement.insertBefore(extraSearchgBox, tabLink);
		}
	}

	function createPageControl() {
		let pageControl = document.getElementById("page-controller");
		let pageFt = document.getElementById("page-ft");
		if (!pageControl && pageFt) {
			pageControl = document.createElement("div");
			pageControl.id = "page-controller";
			pageControl.style =
				"position: relative;line-height: 52px;margin:.08rem 0;text-align: center;color: #9b9fa4";
			pageControl.innerHTML =
				"<div style='display:inline-block;width:20%;height:100%;'></div><div style='display:inline-block;width:20%;height:100%;'></div><div style='display:inline-block;width:20%;height:100%;'></div><div style='display:inline-block;width:20%;height:100%;'></div><div style='display:inline-block;width:20%;height:100%;'></div>";
			pageControl.children[4].innerHTML = " PC ";
			pageControl.children[3].innerHTML = " > ";
			pageControl.children[2].innerHTML = "第 " + getData("index") + " 页";
			pageControl.children[1].innerHTML = " < ";
			pageControl.children[0].innerHTML = " << ";
			pageControl.children[4].onclick = function() {
				location.href = getData("pc");
			}
			pageControl.children[3].onclick = function() {
				location.href = getData("next");
			}
			pageControl.children[2].onclick = function() {
				let mgs="请输入页码！\n注意：如果跳转的页码>实际页码上限，将显示第1页的内容";
				let newIndex = prompt(msg);
				newIndex = newIndex ? parseInt(newIndex.trim()) : "";
				if (!newIndex) {
					return false;
				}
				if (newIndex < 1) {
					alert("页码必须为一个正整数");
				} else {
					let urlPn = newIndex > 1 ? "&pn=" + (newIndex - 1) * 10 : "";
					location.href = getData("home") + urlPn;
				}
			}
			pageControl.children[1].onclick = function() {
				location.href = getData("last");
			}
			pageControl.children[0].onclick = function() {
				location.href = getData("home");
			}
			pageFt.appendChild(pageControl);
			document.getElementsByClassName("infinite-load-wrap")[0].style.display="none";
		}
	}
	if (getData("ua")&&getData("pd")) {
		var t = setTimeout(function() {
			createSearchBar();
			createPageControl();
		}, 200);
		setTimeout(function() {
			clearInterval(t);
		}, 2000);
	}
})();