/*
    jQuery Tags Input Plugin 1.3.3    
    Copyright (c) 2011 XOXCO, Inc
    
    Documentation for this plugin lives here:
    http://xoxco.com/clickable/jquery-tags-input
    
    Licensed under the MIT license:
    http://www.opensource.org/licenses/mit-license.php

    ben@xoxco.com
    ----------------------------------------1.3.3 Kai 0.1-------------------------------------------
    jQuery Tags Input Plugin 1.3.3 Kai 0.1
    what's new
    add 1 function[getTags()]
    add 4 options default[maxCount:0,lowerCase:false,upperCase:false,regex:'']
    fix some error display addClass('not_valid')
    2012-11-08 jsd.xug@sjtu.edu.cn
    ------------------------------------------------------------------------------------------------
*/

(function($) {
    var kaiOptions=new Array();
    var delimiter = new Array();
    var tags_callbacks = new Array();
    $.fn.doAutosize = function(o){
        var minWidth = $(this).data('minwidth'),
            maxWidth = $(this).data('maxwidth'),
            val = '',
            input = $(this),
            testSubject = $('#'+$(this).data('tester_id'));
    
        if (val === (val = input.val())) {return;}
    
        // Enter new content into testSubject
        var escaped = val.replace(/&/g, '&amp;').replace(/\s/g,' ').replace(/</g, '&lt;').replace(/>/g, '&gt;');
        testSubject.html(escaped);
        // Calculate new width + whether to change
        var testerWidth = testSubject.width(),
            newWidth = (testerWidth + o.comfortZone) >= minWidth ? testerWidth + o.comfortZone : minWidth,
            currentWidth = input.width(),
            isValidWidthChange = (newWidth < currentWidth && newWidth >= minWidth)
                                 || (newWidth > minWidth && newWidth < maxWidth);
    
        // Animate width
        if (isValidWidthChange) {
            input.width(newWidth);
        }


  };
  $.fn.resetAutosize = function(options){
    // alert(JSON.stringify(options));
    var minWidth =  $(this).data('minwidth') || options.minInputWidth || $(this).width(),
        maxWidth = $(this).data('maxwidth') || options.maxInputWidth || ($(this).closest('.tagsinput').width() - options.inputPadding),
        val = '',
        input = $(this),
        testSubject = $('<tester/>').css({
            position: 'absolute',
            top: -9999,
            left: -9999,
            width: 'auto',
            fontSize: input.css('fontSize'),
            fontFamily: input.css('fontFamily'),
            fontWeight: input.css('fontWeight'),
            letterSpacing: input.css('letterSpacing'),
            whiteSpace: 'nowrap'
        }),
        testerId = $(this).attr('id')+'_autosize_tester';
    if(! $('#'+testerId).length > 0){
      testSubject.attr('id', testerId);
      testSubject.appendTo('body');
    }

    input.data('minwidth', minWidth);
    input.data('maxwidth', maxWidth);
    input.data('tester_id', testerId);
    input.css('width', minWidth);
  };

    $.fn.getTags = function() {
        var id = $(this).attr('id');
        var tagslist = $(this).val().split(delimiter[id]);
        return tagslist;
    };

    $.fn.addTag = function(value,options) {
            options = jQuery.extend({focus:false,callback:true},options);
            this.each(function() { 
                var id = $(this).attr('id');

                var tagslist = $(this).val().split(delimiter[id]);
                if (tagslist[0] == '') { 
                    tagslist = new Array();
                }
                            
                var maxCount=kaiOptions[id]['maxCount'];
                if(maxCount>0 && tagslist.length>maxCount-1){
                    $('#'+id+'_tag').addClass('not_valid');
                    return;
                }
                
                var lowerCase=kaiOptions[id]['lowerCase'];
                var upperCase=kaiOptions[id]['upperCase'];
                
                if(lowerCase && upperCase){
                    value = jQuery.trim(value);
                }
                else{
                    if(lowerCase){
                        value = jQuery.trim(value.toLowerCase());
                    }
                    if(upperCase){
                        value = jQuery.trim(value.toUpperCase());
                    }
                }
                
                var _reg=kaiOptions[id]['regex'];
                if(jQuery.trim(_reg).length>0){
                    if(!_reg.exec(value)){
                        $('#'+id+'_tag').addClass('not_valid');
                        return;    
                    }
                }
                
                if (options.unique) {
                    var skipTag = $(this).tagExist(value);
                    if(skipTag == true) {
                        //Marks fake input as not_valid to let styling it
                        $('#'+id+'_tag').addClass('not_valid');
                    }
                } else {
                    var skipTag = false; 
                }                
                
                if (value !='' && skipTag != true) { 
                    $('<span>').addClass('tag').append(
                        $('<span>').text(value).append('&nbsp;&nbsp;'),
                        $('<a>', {
                            href  : '#',
                            title : 'Removing tag',
                            text  : 'x'
                        }).click(function () {
                            return $('#' + id).removeTag(escape(value));
                        })
                    ).insertBefore('#' + id + '_addTag');

                    tagslist.push(value);
                
                    $('#'+id+'_tag').val('');
                    if (options.focus) {
                        $('#'+id+'_tag').focus();
                    } else {        
                        $('#'+id+'_tag').blur();
                    }
                    
                    $.fn.tagsInput.updateTagsField(this,tagslist);
                    
                    if (options.callback && tags_callbacks[id] && tags_callbacks[id]['onAddTag']) {
                        var f = tags_callbacks[id]['onAddTag'];
                        f.call(this, value);
                    }
                    if(tags_callbacks[id] && tags_callbacks[id]['onChange'])
                    {
                        var i = tagslist.length;
                        var f = tags_callbacks[id]['onChange'];
                        f.call(this, $(this), tagslist[i-1]);
                    }                    
                }
        
            });        
            
            return false;
        };
        
    $.fn.removeTag = function(value) { 
            value = unescape(value);
            this.each(function() { 
                var id = $(this).attr('id');
    
                var old = $(this).val().split(delimiter[id]);
                    
                $('#'+id+'_tagsinput .tag').remove();
                str = '';
                for (i=0; i< old.length; i++) { 
                    if (old[i]!=value) { 
                        str = str + delimiter[id] +old[i];
                    }
                }
                
                $.fn.tagsInput.importTags(this,str);

                if (tags_callbacks[id] && tags_callbacks[id]['onRemoveTag']) {
                    var f = tags_callbacks[id]['onRemoveTag'];
                    f.call(this, value);
                }
            });
                    
            return false;
        };
    
    $.fn.tagExist = function(val) {
        var id = $(this).attr('id');
        var tagslist = $(this).val().split(delimiter[id]);
        return (jQuery.inArray(val, tagslist) >= 0); //true when tag exists, false when not
    };
    
    // clear all existing tags and import new ones from a string
    $.fn.importTags = function(str) {
        var id = $(this).attr('id');
        $('#' + id + '_tagsinput .tag').remove();
        $.fn.tagsInput.importTags(this, str);
    };
        
    $.fn.tagsInput = function(options) { 
    var settings = jQuery.extend({
      interactive:true,
      defaultText:'add a tag',
      minChars:0,
      width:'300px',
      height:'100px',
      autocomplete: {selectFirst: false },
      'hide':true,
      'delimiter':',',
      'unique':true,
      removeWithBackspace:true,
      placeholderColor:'#666666',
      autosize: true,
      comfortZone: 20,
      inputPadding: 6*2,
      maxCount:0,
      lowerCase:false,
      upperCase:false,
      regex:''
    },options);

        this.each(function() { 
            if (settings.hide) { 
                $(this).hide();                
            }
            var id = $(this).attr('id');
            if (!id || delimiter[$(this).attr('id')]) {
                id = $(this).attr('id', 'tags' + new Date().getTime()).attr('id');
            }
            
            var data = jQuery.extend({
                pid:id,
                real_input: '#'+id,
                holder: '#'+id+'_tagsinput',
                input_wrapper: '#'+id+'_addTag',
                fake_input: '#'+id+'_tag'
            },settings);
            
            kaiOptions[id]=new Array();
            kaiOptions[id]['maxCount']=settings.maxCount;
            kaiOptions[id]['lowerCase']=settings.lowerCase;
            kaiOptions[id]['upperCase']=settings.upperCase;
            kaiOptions[id]['regex']=settings.regex;
            delimiter[id] = data.delimiter;

            if (settings.onAddTag || settings.onRemoveTag || settings.onChange) {
                tags_callbacks[id] = new Array();
                tags_callbacks[id]['onAddTag'] = settings.onAddTag;
                tags_callbacks[id]['onRemoveTag'] = settings.onRemoveTag;
                tags_callbacks[id]['onChange'] = settings.onChange;
            }
    
            var markup = '<div id="'+id+'_tagsinput" class="tagsinput"><div id="'+id+'_addTag">';
            
            if (settings.interactive) {
                markup = markup + '<input id="'+id+'_tag" value="" data-default="'+settings.defaultText+'" />';
            }
            
            markup = markup + '</div><div class="tags_clear"></div></div>';
            
            $(markup).insertAfter(this);

            $(data.holder).css('width',settings.width);
            $(data.holder).css('min-height',settings.height);
            $(data.holder).css('height','100%');
    
            if ($(data.real_input).val()!='') { 
                $.fn.tagsInput.importTags($(data.real_input),$(data.real_input).val());
            }        
            if (settings.interactive) { 
                $(data.fake_input).val($(data.fake_input).attr('data-default'));
                $(data.fake_input).css('color',settings.placeholderColor);
                $(data.fake_input).resetAutosize(settings);
        
                $(data.holder).bind('click',data,function(event) {
                    $(event.data.fake_input).focus();
                });
            
                $(data.fake_input).bind('focus',data,function(event) {
                    if ($(event.data.fake_input).val()==$(event.data.fake_input).attr('data-default')) { 
                        $(event.data.fake_input).val('');
                    }
                    $(event.data.fake_input).css('color','#000000');        
                });
                        
                if (settings.autocomplete_url != undefined) {
                    autocomplete_options = {source: settings.autocomplete_url};
                    for (attrname in settings.autocomplete) { 
                        autocomplete_options[attrname] = settings.autocomplete[attrname]; 
                    }
                

                    if (jQuery.Autocompleter !== undefined) {
                        $(data.fake_input).autocomplete(settings.autocomplete_url, settings.autocomplete);
                        $(data.fake_input).bind('result',data,function(event,data,formatted) {
                            if (data) {
                                //$('#'+id).addTag(data[0] + "",{focus:true,unique:(settings.unique)});
                                $('#'+id).addTag(data + "",{focus:true,unique:(settings.unique)});
                            }
                          });
                    } else if (jQuery.ui.autocomplete !== undefined) {
                        $(data.fake_input).autocomplete(autocomplete_options);
                        $(data.fake_input).bind('autocompleteselect',data,function(event,ui) {
                            $(event.data.real_input).addTag(ui.item.value,{focus:true,unique:(settings.unique)});
                            return false;
                        });
                    }
                
                    
                } else {
                        // if a user tabs out of the field, create a new tag
                        // this is only available if autocomplete is not used.
                        $(data.fake_input).bind('blur',data,function(event) { 
                            var d = $(this).attr('data-default');
                            if ($(event.data.fake_input).val()!='' && $(event.data.fake_input).val()!=d) { 
                                if( (event.data.minChars <= $(event.data.fake_input).val().length) && (!event.data.maxChars || (event.data.maxChars >= $(event.data.fake_input).val().length)) )
                                    $(event.data.real_input).addTag($(event.data.fake_input).val(),{focus:true,unique:(settings.unique)});
                            } else {
                                $(event.data.fake_input).val($(event.data.fake_input).attr('data-default'));
                                $(event.data.fake_input).css('color',settings.placeholderColor);
                            }
                            return false;
                        });
                
                }
                // if user types a comma, create a new tag
                $(data.fake_input).bind('keypress',data,function(event) {
                    if (event.which==event.data.delimiter.charCodeAt(0) || event.which==13 ) {
                        event.preventDefault();
                        if( (event.data.minChars <= $(event.data.fake_input).val().length) && (!event.data.maxChars || (event.data.maxChars >= $(event.data.fake_input).val().length)) )
                            $(event.data.real_input).addTag($(event.data.fake_input).val(),{focus:true,unique:(settings.unique)});
                          $(event.data.fake_input).resetAutosize(settings);
                        return false;
                    } else if (event.data.autosize) {
                        $(event.data.fake_input).doAutosize(settings);
            
                      }
                });
                //Delete last tag on backspace
                data.removeWithBackspace && $(data.fake_input).bind('keydown', function(event)
                {
                    if(event.keyCode == 8 && $(this).val() == '')
                    {
                         event.preventDefault();
                         var last_tag = $(this).closest('.tagsinput').find('.tag:last').text();
                         var id = $(this).attr('id').replace(/_tag$/, '');
                         last_tag = last_tag.replace(/[\s]+x$/, '');
                         $('#' + id).removeTag(escape(last_tag));
                         $(this).trigger('focus');
                    }
                });
                $(data.fake_input).blur();
                
                //Removes the not_valid class when user changes the value of the fake input
                if(data.unique) {
                    $(data.fake_input).keydown(function(event){
                        if(event.keyCode == 8 || String.fromCharCode(event.which).match(/\w+|[áéíóúÁÉÍÓÚñÑ,/]+/)) {
                            $(this).removeClass('not_valid');
                        }
                    });
                }
            } // if settings.interactive
        });
            
        return this;
    
    };
    
    $.fn.tagsInput.updateTagsField = function(obj,tagslist) { 
        var id = $(obj).attr('id');
        $(obj).val(tagslist.join(delimiter[id]));
    };
    
    $.fn.tagsInput.importTags = function(obj,val) {            
        $(obj).val('');
        var id = $(obj).attr('id');
        var tags = val.split(delimiter[id]);
        for (i=0; i<tags.length; i++) { 
            $(obj).addTag(tags[i],{focus:false,callback:false});
        }
        if(tags_callbacks[id] && tags_callbacks[id]['onChange'])
        {
            var f = tags_callbacks[id]['onChange'];
            f.call(obj, obj, tags[i]);
        }
    };

})(jQuery);