// ==UserScript==
// @name         移动百度优化
// @namespace    http://tampermonkey.net/
// @version      0.6
// @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 longPress(target, eventFn) {//长按事件
		let timer = -1;
		target.addEventListener("touchstart", function() {
			timer = setTimeout(function() {
				eventFn();
			}, 400);
		})
		target.addEventListener("touchend", function() {
			clearTimeout(timer);
		})
	}
	
	function fixSearchBar(noAlert){//固定/解除固定顶栏
		let head = document.querySelector("#page-hd");
		let page=document.querySelector("#page");
		let msg;
		if (head.style.position === "fixed") {
			head.style.position = "";
			page.style.marginTop="";
			storageData("set","isFixed",false);
			msg="顶栏：已解除固定";
		} else {
			head.style.position = "fixed";
			page.style.marginTop=getComputedStyle(head).height;
			storageData("set","isFixed",true);
			msg="顶栏：已固定顶部";
		}
		console.log(msg);
		if(!noAlert){
			alert(msg);
		}
	}

	function getData(key) {//获取需要的数据
		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);
		}
		if (key === "wd") {
			let searchWord = /word=/i.test(ls) ? ls.slice(ls.search("word=") + 5) : "";
			searchWord = !searchWord && /wd=/i.test(ls) ? ls.slice(ls.search("wd=") + 3) : searchWord;
			searchWord = searchWord ? decodeURIComponent(searchWord.split("&")[0].replace("+"," ")) : "";
			return searchWord
		}
		return false;
	}
	
	function storageData(type,key,value){//本地存储相关功能
		let name="mobileBaiduOptimizeSettingsData";
		let initData={
			"isFixed":false
		}
		let data=localStorage.getItem(name);
		try{
			data=data?JSON.parse(data):{};
		}catch(e){
			data={};
		}
		data={...initData,...data};
		if(type==="set"){
			data[key]=value;
			data=JSON.stringify(data);
			localStorage.setItem(name,data);
		}else if(type==="get"){
			return data[key];
		}
	}

	function createSearchBar() {//创建顶部搜索栏
		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.setAttribute("id", "extraSearchgBox");
			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("wd") +
				"' 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>";
			longPress(extraSearchgBox.querySelector(".se-bearicon"), fixSearchBar);
			tabLink.parentElement.insertBefore(extraSearchgBox, tabLink);
			if(storageData("get","isFixed")){
				fixSearchBar(true);
			}
		}
	}

	if (getData("ua") && getData("pd")) {//判断是否启动脚本
		var t = setTimeout(function() {
			createSearchBar();
		}, 200);
		setTimeout(function() {
			clearInterval(t);
		}, 2000);
	}
})();