/*仿百度标签输入v0.1
* @name jquery.tagsinput.js
* @version 0.1
* @author liping
* @date 2014/06/10
* @Email:272323108@qq.com
*/
(function ($) {
    $.fn.TagsInput = function (options) {
        //默认参数
        var defaults = {
            usedTags: "",
            hotTags: "",
            tagNum: 0,
            maxWords: 0
        };
        //用传入参数覆盖了默认值
        var opts = $.extend(defaults, options);
        //对象
        var $this = $(this);
        $this.hide();
        var arrayTags;
        var strHtml;
        strHtml = "<div class=\"tags-wrapper clearfix\">";
        strHtml += "<div id=\"addTagWrap\" ><div class=\"added-tags-wrapper\"></div>";
        strHtml += "<input id=\"tagInput\" type=\"text\" placeholder=\"添加标签，以逗号、分号或空格隔开，分隔符占一个字符长度\" autocomplete=\"off\">";
        strHtml += "</div><div class=\"layer-tags-wrapper\">";
        if (opts.usedTags != "") {
            strHtml += "<div class=\"clearfix layer-tags-box\"><div class=\"layer-tags-left\">记忆标签</div><div class=\"layer-tags-right\">";
            arrayTags = opts.usedTags.split('|');
            for (i = 0; i < arrayTags.length; i++) {
                strHtml += "<a class=\"layer-tag-name\" href=\"javascript:;\">" + arrayTags[i] + "</a>";
            }
            strHtml += "</div></div>";
        }
        if (opts.hotTags != "") {
            strHtml += "<div class=\"clearfix layer-tags-box\"><div class=\"layer-tags-left\">热门标签</div><div class=\"layer-tags-right\">";
            arrayTags = opts.hotTags.split('|');
            for (i = 0; i < arrayTags.length; i++) {
                strHtml += "<a class=\"layer-tag-name\" href=\"javascript:;\">" + arrayTags[i] + "</a>";
            }
            strHtml += "</div></div>";
        }
        if (opts.tagNum != 0 && opts.maxWords != 0) {
            //strHtml += "<div class=\"layer-tags-foot clearfix \">最多可添加" + opts.tagNum + "个标签，每个标签不超过" + opts.maxWords + "个汉字</div>";
			strHtml += "<div class=\"layer-tags-foot clearfix \">最多可添加" + opts.tagNum + "个标签，每个标签不超过" + opts.maxWords + "个字符</div>";
        }
        else if (opts.tagNum != 0 && opts.maxWords == 0) {
            strHtml += "<div class=\"layer-tags-foot clearfix \">最多可添加" + opts.tagNum + "个标签</div>";
        }
        else if (opts.tagNum == 0 && opts.maxWords != 0) {
            //strHtml += "<div class=\"layer-tags-foot clearfix \">每个标签不超过" + opts.maxWords + "个汉字</div>";
			strHtml += "<div class=\"layer-tags-foot clearfix \">每个标签不超过" + opts.maxWords + "个字符</div>";
        }
        else {
            //strHtml += "<div class=\"layer-tags-foot clearfix \">标签个数最好少于10个，每个标签最好不超过10个汉字</div>";
			strHtml += "<div class=\"layer-tags-foot clearfix \">标签个数最好少于10个，每个标签最好不超过10个字符</div>";
        }
        strHtml += "</div></div>";
        $(strHtml).insertAfter($this);
        if ($(".layer-tag-name").length > 0) {
            $(".layer-tags-foot").addClass("layer-tags-foot-top");
        }

        var inputTags = $this.val();
        arrayTags = inputTags.split(',');
        for (i = 0; i < arrayTags.length; i++) {
            addTag(arrayTags[i]);
        }
        $(".layer-tag-name").each(function () {
            $(this).click(function () { addTag($(this).text()); });
        });

        $("#tagInput").keydown(function (e) {
            var keyCode = e.which || e.keyCode;
            if (keyCode == 13 || keyCode == 32 || keyCode == 9) {
                if (addTag($(this).val())) { $(this).val(""); }
                return false;
            }
        }).keyup(function (e) {
            var keyCode = e.which || e.keyCode;
            if (keyCode == 188 || keyCode == 59 || keyCode == 186) {
                if (addTag($(this).val())) { $(this).val(""); }
                return false;
            }
        }).click(function () {
            $(".layer-tags-wrapper").show();
        }).blur(function () {
            if (addTag($(this).val())) { $(this).val(""); }
            return false;
        });

        $(".tags-wrapper").mouseleave(function () {
            $(".layer-tags-wrapper").hide();
        });

        function addTag(obj) {
            obj = obj.replace(/[ |,|，|;|；]/g, "");
            if (obj == "") { return false; }
            //只统计汉字字数
            var num = 0;
            //var arr = obj.match(/[^\x00-\xff]/g);
            //if (arr != null) {
                num = obj.length;
                if (opts.maxWords > 0 && num > opts.maxWords) {
                    //MessageBox("单个标签最多" + opts.maxWords + "个汉字");
					MessageBox("单个标签最多" + opts.maxWords + "个字符");
                    return false;
                }
                num = 0;
           //}
            var tags = $("#addTagWrap .inner-tag-name");
            var flag = true;
            var s = "";
            tags.each(function () {
                if ($(this).text() == obj) {
                    flag = false;
                    return false;
                }
                num++;
                s += $(this).text() + "|";
            });
            if (opts.tagNum > 0 && num >= opts.tagNum) {
                MessageBox("最多可添加" + opts.tagNum + "个标签");
                return false;
            }
            if (flag) {
                $(".added-tags-wrapper").append("<div class=\"inner-tag-wrapper\"><span class=\"inner-tag-name\">" + obj + "</span><a class=\"inner-tag-close\" title=\"删除\" href=\"javascript:;\">×</a></div>");
                $(".added-tags-wrapper .inner-tag-close:last").click(function () {
                    $(this).parent().remove();
                    var t = getRemoveValue();
                    $this.val(t);
                });
                s += obj + "|";
                if (s.length > 0) {
                    s = s.substring(0, s.length - 1);
                    $this.val(s);
                }
                return true;
            }
            else {
                MessageBox("该标签已经存在");
                return false;
            }
        }

        function MessageBox(obj) {
            $("<div class=\"message-box\">" + obj + "</div>").appendTo("body");
            $(".message-box").delay(1000).fadeOut("slow", function () {
                $(this).remove();
            });
        }
        
        function getRemoveValue() {
        	var tags = $("#addTagWrap .inner-tag-name");
        	var s = "";
            tags.each(function () {
                s += $(this).text() + "|";
            });
            if (s.length > 0) {
                s = s.substring(0, s.length - 1);
            }
            return s;
        }
    };
})(jQuery);