;(function ($) {
    /*
     * 基于jQuery實(shí)現(xiàn)類似Google+圈子選擇功能插件（支持鍵盤事件）@Mr.Think(http://mrthink.net/)
     */
    $.fn.iChoose = function (options) {
        var SELF=this;
        var iset = $.extend({}, $.fn.iChoose.defaults, options);
        var _h,pull=null;
        var main=$(iset.choMain);
        var chose=$(iset.choCls,main);
        var input=$(SELF);
        var tips=$(iset.tips,main);
        var cls=iset.selCls;
        var ids=$(iset.chsIds);
        var _l=iset.limit;
        //若無(wú)列表數(shù)據(jù)則中斷
        if(iset.data.length==0){return false}
        //初始化下拉列表
        var tpl='<div class="'+iset.pullCls+'"><ul>';
        var tplArr=[];
        $.each(iset.data,function(k,v){
            tplArr.push('<li data-mid="'+ v.mid+'" data-name="'+ v.filterName.toUpperCase()+'" class="hook_visible hook_'+v.mid+'">'+ v.name+'</li>');
        });
        tpl=tpl+tplArr.join('')+'</ul></div>';
        if(pull==null){
            main.append(tpl);
        }
        pull=$('.'+iset.pullCls,main);
        _h=pull.find('li').outerHeight(true);
        pull.width(main.width()-2);
        //操作函數(shù)
        var Action={
            init:function(){
                //列表鼠標(biāo)劃過
                pull.delegate('li.hook_visible','mouseover',function(){
                    $(this).addClass(cls).siblings().removeClass(cls);
                });
                //選擇列表
                pull.delegate('li.hook_visible','click',function(){
                    Action.choose($(this));
                });
                //點(diǎn)擊彈出列表
                chose.click(function(){
                    Action.show();
                });
                //移除已選擇
                chose.delegate('.'+iset.removeEl,'click',function(){
                    Action.undock($(this));
                });
            },
            move: function(dir) {
                //上下移動(dòng) - 上::str=up | 下::step=down;
                var index;
                var item=pull.find('li.hook_visible').filter(':visible');
                var cur=item.filter('.'+cls);
                cur.size()==0 ? index=-1 : index=item.index(cur);
                item.eq(dir=='up' ? (index<1 ? 0 : index-1) : index+1).addClass(cls).siblings().removeClass(cls);
                //移動(dòng)時(shí)跟隨滾動(dòng)
                if(item.size()>_l){
                    //下翻滾動(dòng)
                    if(dir=='down'){
                        pull.scrollTop((index+2-_l)*_h);
                    }
                    //上翻滾動(dòng)
                    if(dir=='up'){
                        pull.scrollTop((index-1)*_h);
                    }
                }
            },
            choose:function(el){
                //列表選擇
                var mid=el.attr('data-mid');
                var name=el.text();
                tips.before('<div class="'+iset.selItemCls+'"><span>'+name+'</span><a href="javascript:;" class="'+iset.removeEl+'" data-mid="'+mid+'">x</a></div>');
                input.focus();
                el.hide().removeClass('hook_visible');
                //返回選中列表id
                ids.val() =='' ? ids.val(mid) : ids.val(ids.val()+','+mid);
                pull.find('li.hook_visible:first').addClass(cls).siblings().removeClass(cls);
                this.upstyle();
            },
            undock:function(el){
                //刪除已選
                var mid=el.attr('data-mid');
                var idsArr=ids.val().split(',');
                input.focus();
                el.parent().remove();
                idsArr=$.grep(idsArr,function(v,k){
                   return v != mid;
                });
                ids.val(idsArr.join(','));
                pull.find('li.hook_'+mid).show().addClass('hook_visible');
                this.upstyle();
            },
            show:function(){
                //顯示列表
                pull.slideDown(100,function(){Action.match('')});
                pull.find('li.hook_visible:first').addClass(cls).siblings().removeClass(cls);
                $(SELF).focus();
                tips.hide();
                input.addClass(iset.inputWCls);
            },
            hide:function(){
                //隱藏列表
                pull.slideUp(100);
                $(SELF).blur();
                tips.show();
                input.removeClass(iset.inputWCls);
            },
            upstyle:function(type){
                //更新下拉列表樣式 - 當(dāng)已選換行時(shí) --
                var len=pull.find('li.hook_visible').size();
                if(type=='match'){
                    len=pull.find('li:visible').size();
                }
                if(len<_l){
                    pull.height(_h*len);
                    if(len==0){
                        this.hide();
                    }
                }else{
                    pull.height(_h*_l);
                }
                pull.css('top',chose.outerHeight());
            },
            match:function(str){
                //過濾選擇 - 拼音選擇須插件支持
                var visible=pull.find('li.hook_visible');
                visible.each(function(){
                    var name=$(this).attr('data-name');
                    name.match(str.toUpperCase())!=null ? $(this).show() : $(this).hide();
                });
                if(visible.size()==0 && $('.'+iset.noResCls).size()==0){
                    pull.find('li:first').before('<li class="'+iset.noResCls+'">暫無(wú)可選擇列表</li>')
                }
                this.upstyle('match');
            },
            blur:function(str){
                //非選擇區(qū)域點(diǎn)擊隱藏
                pull.find('li.hook_visible').each(function(){
                    var name=$(this).text();
                    if(name == str){
                        Action.choose($(this));
                    }
                });
                input.val('');
            }
        }
        Action.init();
        //鍵盤控制 - 綁定輸入表單
        $(this).on({
            //鍵盤彈起
            'keyup change':function(){
                var val= $.trim(input.val());
                Action.match(val);
            },
            //失去焦點(diǎn)
            'blur':function(){
                var val= $.trim(input.val());
                Action.blur(val);
            },
            //鍵盤按下 -- 捕獲鍵盤值，以執(zhí)行對(duì)應(yīng)事件
            /*
            8  - delete;
            27 - esc;
            38 - up;
            40 - down;
            9  - tab;
            13 - enter
             */
            'keydown':function(e){
                switch (e.keyCode) {
                    case 8:
                        if($.trim(input.val())==''){
                            e.preventDefault();
                            var last=chose.find('.'+iset.removeEl+':last');
                            if(last.size()>0){
                                Action.undock(last);
                            }
                        }
                        break;
                    case 27:
                        e.preventDefault();
                        Action.hide();
                        break;
                    case 38:
                        e.preventDefault();
                        Action.move('up');
                        break;
                    case 40:
                        e.preventDefault();
                        Action.move('down')
                        break;
                    case 9:
                    case 13:
                        e.preventDefault();
                        Action.choose(pull.find('.'+cls));
                        break;
                    default:
                        $.noop();
                }
            }
        });
        //點(diǎn)擊非當(dāng)前區(qū)域隱藏彈出層
        main.click(function(e){
            e.stopPropagation();
        });
        $(document).click(function(){
           Action.hide();
        });
    }
    $.fn.iChoose.defaults = {
        /*
        data:傳入值，可以實(shí)時(shí)ajax傳上，演示中是json值，具體格式可參考mod.udatas.js中的$.map(...)
        limit:每次顯示的條數(shù)，其他滾動(dòng)顯示
        choMain:載入?yún)^(qū)域id
        pullCls:彈出列表的class
        choCls:已選擇列表的外圍class
        selItemCls:已選擇的單個(gè)元素class
        removeEl:刪除元素的class
        selCls:列表高亮的class
        inputWCls:input的class
        tips:默認(rèn)提示值元素鉤子
        noResCls:列表中無(wú)結(jié)果時(shí)的cls
        chsIds:已選擇列表的id值，傳給后端用的。（此值亦可用回調(diào)函數(shù)把值從插件中回傳出來(lái)）
         */
        data:UDatas,
        limit:5,
        choMain:'#iChooseMain',
        pullCls:'icm-list',
        choCls:'.icm-box',
        selItemCls:'icm-item',
        removeEl:'icm-delete',
        selCls:'selected',
        inputWCls:'icm-input-w',
        tips:'.icm-cur-txt',
        noResCls:'hook_noresult',
        chsIds:'#iChooseIds'
    }
})(jQuery);