var tabFilter, menu = [],
    liIndex, curNav, delMenu;
layui.define(["element", "jquery"], function (exports) {
    var element = layui.element,
        $ = layui.jquery,
        layId,
        Tab = function () {
            this.tabConfig = {
                closed: true,
                openTabNum: 100,
                tabFilter: "bodyTab"
            }
        };

    //获取二级菜单数据
    Tab.prototype.render = function () {
        var _this = this;
        $.ajax({
            url: 'mainMenu?sysId=' + location.searchObj().sysId,
            data: {
                requestMode: 0
            },
            async: false,
            success: function (res) {
                
                //layer.closeAll('loading'); //关闭加载层
                if (!(res.retHead.errCode - 0)) {
                    navs = res.retBody.list;
                    if (!navs) {
                        return;
                    }
                    //显示左侧菜单
                    if ($(".navBar").html() == '') {
                        $(".navBar").html(navBar(navs)).height($(window).height() - 60);
                        element.init(); //初始化页面元素
                        $(window).resize(function () {
                            $(".navBar").height($(window).height() - 60);
                        })
                    }
                } else if ((res.retHead.errCode - 0) == 1004) {
                    top.location.href = window.hywa.jumpPage.login;
                }
            }
        });
    }

    //参数设置
    Tab.prototype.set = function (option) {
        var _this = this;
        $.extend(true, _this.tabConfig, option);
        return _this;
    };

    //通过title获取lay-id
    Tab.prototype.getLayId = function (title) {
        $(".layui-tab-title.top_tab li").each(function () {
            if ($(this).find("cite").text() == title) {
                layId = $(this).attr("lay-id");
            }
        })
        return layId;
    }
    //通过title判断tab是否存在
    Tab.prototype.hasTab = function (title) {
        var tabIndex = -1;
        $(".layui-tab-title.top_tab li").each(function () {
            if ($(this).find("cite").text() == title) {
                tabIndex = 1;
            }
        })
        return tabIndex;
    }

    //右侧内容tab操作
    var tabIdIndex = 0;
    Tab.prototype.tabAdd = function (_this) {
        if (window.sessionStorage.getItem("menu")) {
            menu = JSON.parse(window.sessionStorage.getItem("menu"));
        }
        var that = this;
        var closed = that.tabConfig.closed,
            openTabNum = that.tabConfig.openTabNum;
        tabFilter = that.tabConfig.tabFilter;
        if (_this.find("i.iconfont,i.layui-icon").attr("data-icon") != undefined) {
            var title = '';
            if (that.hasTab(_this.find("cite").text()) == -1 && _this.siblings("dl.layui-nav-child").length ==
                0) {
                if ($(".layui-tab-title.top_tab li").length == openTabNum) {
                    layer.msg('只能同时打开' + openTabNum + '个选项卡哦。不然系统会卡的！');
                    return;
                }
                tabIdIndex++;
                title += '<cite>' + _this.find("cite").text() + '</cite>';
                title += '<i class="layui-icon layui-unselect layui-tab-close" data-id="' + tabIdIndex +
                    '">&#x1006;</i>';
                element.tabAdd(tabFilter, {
                    title: title,
                    content: "<iframe src='views/" + _this.attr("data-url") + "' data-id='" + tabIdIndex +
                        "'></frame>",
                    id: new Date().getTime()
                })

                //当前窗口内容
                var curmenu = {
                    "icon": _this.find("i.iconfont").attr("data-icon") != undefined ? _this.find(
                        "i.iconfont").attr("data-icon") : _this.find("i.layui-icon").attr(
                            "data-icon"),
                    "title": _this.find("cite").text(),
                    "href": _this.attr("data-url"),
                    "layId": new Date().getTime()
                }
                menu.push(curmenu);
                window.sessionStorage.setItem("menu", JSON.stringify(menu)); //打开的窗口
                window.sessionStorage.setItem("curmenu", JSON.stringify(curmenu)); //当前的窗口
                element.tabChange(tabFilter, that.getLayId(_this.find("cite").text()));
                that.tabMove(); //顶部窗口是否可滚动
            } else {
                //当前窗口内容
                var curmenu = {
                    "icon": _this.find("i.iconfont").attr("data-icon") != undefined ? _this.find(
                        "i.iconfont").attr("data-icon") : _this.find("i.layui-icon").attr(
                            "data-icon"),
                    "title": _this.find("cite").text(),
                    "href": _this.attr("data-url"),
                    "layId": new Date().getTime()
                }
                window.sessionStorage.setItem("curmenu", JSON.stringify(curmenu)); //当前的窗口
                element.tabChange(tabFilter, that.getLayId(_this.find("cite").text()));
                that.tabMove(); //顶部窗口是否可滚动
            }
        }
    }

    //顶部窗口移动
    Tab.prototype.tabMove = function () {
        $(window).on("resize", function () {
            var topTabsBox = $("#top_tabs_box"),
                topTabsBoxWidth = $("#top_tabs_box").width(),
                topTabs = $("#top_tabs"),
                topTabsWidth = $("#top_tabs").width(),
                tabLi = topTabs.find("li.layui-this"),
                top_tabs = document.getElementById("top_tabs");;

            if (topTabsWidth > topTabsBoxWidth) {
                if (tabLi.position().left > topTabsBoxWidth || tabLi.position().left + topTabsBoxWidth > topTabsWidth) {
                    topTabs.css("left", topTabsBoxWidth - topTabsWidth);
                } else {
                    topTabs.css("left", -tabLi.position().left);
                }
                //拖动效果
                var flag = false;
                var cur = {
                    x: 0,
                    y: 0
                }
                var nx, dx, x;
                function down() {
                    flag = true;
                    var touch;
                    if (event.touches) {
                        touch = event.touches[0];
                    } else {
                        touch = event;
                    }
                    cur.x = touch.clientX;
                    dx = top_tabs.offsetLeft;
                }
                function move() {
                    var self = this;
                    window.getSelection ? window.getSelection().removeAllRanges() : document.selection.empty();
                    if (flag) {
                        var touch;
                        if (event.touches) {
                            touch = event.touches[0];
                        } else {
                            touch = event;
                        }
                        nx = touch.clientX - cur.x;
                        x = dx + nx;
                        if (x > 0) {
                            x = 0;
                        } else {
                            if (x < topTabsBoxWidth - topTabsWidth) {
                                x = topTabsBoxWidth - topTabsWidth;
                            } else {
                                x = dx + nx;
                            }
                        }
                        top_tabs.style.left = x + "px";
                        //阻止页面的滑动默认事件
                        document.addEventListener("touchmove", function () {
                            event.preventDefault();
                        }, false);
                    }
                }
                //鼠标释放时候的函数
                function end() {
                    flag = false;
                }
                //pc端拖动效果
                topTabs.on("mousedown", down);
                topTabs.on("mousemove", move);
                $(document).on("mouseup", end);
                //移动端拖动效果
                topTabs.on("touchstart", down);
                topTabs.on("touchmove", move);
                topTabs.on("touchend", end);
            } else {
                //移除pc端拖动效果
                topTabs.off("mousedown", down);
                topTabs.off("mousemove", move);
                topTabs.off("mouseup", end);
                //移除移动端拖动效果
                topTabs.off("touchstart", down);
                topTabs.off("touchmove", move);
                topTabs.off("touchend", end);
                topTabs.removeAttr("style");
                return false;
            }
        }).resize();
    }

    $("body").on("click", ".top_tab li", function () {
        //切换后获取当前窗口的内容
        var curmenu = '';
        var menu = JSON.parse(window.sessionStorage.getItem("menu"));
        curmenu = menu[$(this).index() - 1];
        if ($(this).index() == 0) {
            window.sessionStorage.setItem("curmenu", '');
        } else {
            window.sessionStorage.setItem("curmenu", JSON.stringify(curmenu));
            if (window.sessionStorage.getItem("curmenu") == "undefined") {
                //如果删除的不是当前选中的tab,则将curmenu设置成当前选中的tab
                if (curNav != JSON.stringify(delMenu)) {
                    window.sessionStorage.setItem("curmenu", curNav);
                } else {
                    window.sessionStorage.setItem("curmenu", JSON.stringify(menu[liIndex - 1]));
                }
            }
        }
        element.tabChange(tabFilter, $(this).attr("lay-id")).init();
    })

    //删除tab
    $("body").on("click", ".top_tab li i.layui-tab-close", function () {
        //删除tab后重置session中的menu和curmenu
        liIndex = $(this).parent("li").index();
        var menu = JSON.parse(window.sessionStorage.getItem("menu"));
        //获取被删除元素
        delMenu = menu[liIndex - 1];
        var curmenu = window.sessionStorage.getItem("curmenu") == "undefined" ? "undefined" : window.sessionStorage
            .getItem("curmenu") == "" ? '' : JSON.parse(window.sessionStorage.getItem("curmenu"));
        if (JSON.stringify(curmenu) != JSON.stringify(menu[liIndex - 1])) { //如果删除的不是当前选中的tab
            // window.sessionStorage.setItem("curmenu",JSON.stringify(curmenu));
            curNav = JSON.stringify(curmenu);
        } else {
            if ($(this).parent("li").length > liIndex) {
                window.sessionStorage.setItem("curmenu", curmenu);
                curNav = curmenu;
            } else {
                window.sessionStorage.setItem("curmenu", JSON.stringify(menu[liIndex - 1]));
                curNav = JSON.stringify(menu[liIndex - 1]);
            }
        }
        menu.splice((liIndex - 1), 1);
        window.sessionStorage.setItem("menu", JSON.stringify(menu));
        element.tabDelete("bodyTab", $(this).parent("li").attr("lay-id")).init();
    })

    var bodyTab = new Tab();
    exports("bodyTab", function (option) {
        return bodyTab.set(option);
    });
})