/*
 * MultiDatesPicker v1.6.4
 * http://multidatespickr.sourceforge.net/
 * 
 * Copyright 2014, Luca Lauretta
 * Dual licensed under the MIT or GPL version 2 licenses.
 */
(function( $ ){
  $.extend($.ui, { multiDatesPicker: { version: "1.6.4" } });
  
  $.fn.multiDatesPicker = function(method) {
    var mdp_arguments = arguments;
    var ret = this;
    var today_date = new Date();
    var day_zero = new Date(0);
    var mdp_events = {};
    
    function removeDate(date, type) {
      if(!type) type = 'picked';
      date = dateConvert.call(this, date);
      for(var i = 0; i < this.multiDatesPicker.dates[type].length; i++)
        if(!methods.compareDates(this.multiDatesPicker.dates[type][i], date))
          return this.multiDatesPicker.dates[type].splice(i, 1).pop();
    }
    function removeIndex(index, type) {
      if(!type) type = 'picked';
      return this.multiDatesPicker.dates[type].splice(index, 1).pop();
    }
    function addDate(date, type, no_sort) {
      if(!type) type = 'picked';
      date = dateConvert.call(this, date);
      
      // @todo: use jQuery UI datepicker method instead
      date.setHours(0);
      date.setMinutes(0);
      date.setSeconds(0);
      date.setMilliseconds(0);
      
      if (methods.gotDate.call(this, date, type) === false) {
        this.multiDatesPicker.dates[type].push(date);
        if(!no_sort) this.multiDatesPicker.dates[type].sort(methods.compareDates);
      } 
    }
    function sortDates(type) {
      if(!type) type = 'picked';
      this.multiDatesPicker.dates[type].sort(methods.compareDates);
    }
    function dateConvert(date, desired_type, date_format) {
      if(!desired_type) desired_type = 'object';/*
      if(!date_format && (typeof date == 'string')) {
        date_format = $(this).datepicker('option', 'dateFormat');
        if(!date_format) date_format = $.datepicker._defaults.dateFormat;
      }
      */
      return methods.dateConvert.call(this, date, desired_type, date_format);
    }
    
    var methods = {
      init : function( options ) {
        var $this = $(this);
        this.multiDatesPicker.changed = false;
        
        var mdp_events = {
          beforeShow: function(input, inst) {
            this.multiDatesPicker.changed = false;
            if(this.multiDatesPicker.originalBeforeShow) 
              this.multiDatesPicker.originalBeforeShow.call(this, input, inst);
          },
          onSelect : function(dateText, inst) {
            var $this = $(this);
            this.multiDatesPicker.changed = true;
            
            if (dateText) {
              $this.multiDatesPicker('toggleDate', dateText);
              this.multiDatesPicker.changed = true;
              // @todo: this will be optimized when I'll move methods to the singleton.
            }
            
            if (this.multiDatesPicker.mode == 'normal' && this.multiDatesPicker.pickableRange) {
              if(this.multiDatesPicker.dates.picked.length > 0) {
                var min_date = this.multiDatesPicker.dates.picked[0],
                  max_date = new Date(min_date.getTime());
                
                methods.sumDays(max_date, this.multiDatesPicker.pickableRange-1);
                  
                // counts the number of disabled dates in the range
                if(this.multiDatesPicker.adjustRangeToDisabled) {
                  var c_disabled, 
                    disabled = this.multiDatesPicker.dates.disabled.slice(0);
                  do {
                    c_disabled = 0;
                    for(var i = 0; i < disabled.length; i++) {
                      if(disabled[i].getTime() <= max_date.getTime()) {
                        if((min_date.getTime() <= disabled[i].getTime()) && (disabled[i].getTime() <= max_date.getTime()) ) {
                          c_disabled++;
                        }
                        disabled.splice(i, 1);
                        i--;
                      }
                    }
                    max_date.setDate(max_date.getDate() + c_disabled);
                  } while(c_disabled != 0);
                }
                
                if(this.multiDatesPicker.maxDate && (max_date > this.multiDatesPicker.maxDate))
                  max_date = this.multiDatesPicker.maxDate;
                
                $this
                  .datepicker("option", "minDate", min_date)
                  .datepicker("option", "maxDate", max_date);
              } else {
                $this
                  .datepicker("option", "minDate", this.multiDatesPicker.minDate)
                  .datepicker("option", "maxDate", this.multiDatesPicker.maxDate);
              }
            }
            
            if(this.multiDatesPicker.originalOnSelect && dateText)
              this.multiDatesPicker.originalOnSelect.call(this, dateText, inst);
            
          },
          beforeShowDay : function(date) {
            var $this = $(this),
              gotThisDate = $this.multiDatesPicker('gotDate', date) !== false,
              isDisabledCalendar = $this.datepicker('option', 'disabled'),
              isDisabledDate = $this.multiDatesPicker('gotDate', date, 'disabled') !== false,
              areAllSelected = this.multiDatesPicker.maxPicks <= this.multiDatesPicker.dates.picked.length;
            
            var bsdReturn = [true, '', null];
            if(this.multiDatesPicker.originalBeforeShowDay)
              bsdReturn = this.multiDatesPicker.originalBeforeShowDay.call(this, date);
            
            bsdReturn[1] = gotThisDate ? 'ui-state-highlight '+bsdReturn[1] : bsdReturn[1];
            bsdReturn[0] = bsdReturn[0] && !(isDisabledCalendar || isDisabledDate || (areAllSelected && !bsdReturn[1]));
            return bsdReturn;
          }
        };
        
        // value have to be extracted before datepicker is initiated
        if($this.val()) var inputDates = $this.val()
        
        if(options) {
          // value have to be extracted before datepicker is initiated
          //if(options.altField) var inputDates = $(options.altField).val();
          if(options.separator) this.multiDatesPicker.separator = options.separator;
          if(!this.multiDatesPicker.separator) this.multiDatesPicker.separator = ', ';
          
          this.multiDatesPicker.originalBeforeShow = options.beforeShow;
          this.multiDatesPicker.originalOnSelect = options.onSelect;
          this.multiDatesPicker.originalBeforeShowDay = options.beforeShowDay;
          this.multiDatesPicker.originalOnClose = options.onClose;
          
          // datepicker init
          $this.datepicker(options);
          
          this.multiDatesPicker.minDate = $.datepicker._determineDate(this, options.minDate, null);
          this.multiDatesPicker.maxDate = $.datepicker._determineDate(this, options.maxDate, null);
          if(options.addDates) methods.addDates.call(this, options.addDates);
           
          if(options.addDisabledDates)
            methods.addDates.call(this, options.addDisabledDates, 'disabled');
          
          methods.setMode.call(this, options);
        } else {
          $this.datepicker();
        }
        $this.datepicker('option', mdp_events);
        
        // adds any dates found in the input or alt field
        if(inputDates) $this.multiDatesPicker('value', inputDates);
        
        // generates the new string of added dates
        var inputs_values = $this.multiDatesPicker('value');
        
        // fills the input field back with all the dates in the calendar
        $this.val(inputs_values);
        
        // Fixes the altField filled with defaultDate by default
        var altFieldOption = $this.datepicker('option', 'altField');
        if (altFieldOption) $(altFieldOption).val(inputs_values);
        
        // Updates the calendar view
        $this.datepicker('refresh');
      },
      compareDates : function(date1, date2) {
        date1 = dateConvert.call(this, date1);
        date2 = dateConvert.call(this, date2);
        // return > 0 means date1 is later than date2 
        // return == 0 means date1 is the same day as date2 
        // return < 0 means date1 is earlier than date2 
        var diff = date1.getFullYear() - date2.getFullYear();
        if(!diff) {
          diff = date1.getMonth() - date2.getMonth();
          if(!diff) 
            diff = date1.getDate() - date2.getDate();
        }
        return diff;
      },
      sumDays : function( date, n_days ) {
        var origDateType = typeof date;
        obj_date = dateConvert.call(this, date);
        obj_date.setDate(obj_date.getDate() + n_days);
        return dateConvert.call(this, obj_date, origDateType);
      },
      dateConvert : function( date, desired_format, dateFormat ) {
        var from_format = typeof date;
        var $this = $(this);
        
        if(from_format == desired_format) {
          if(from_format == 'object') {
            try {
              date.getTime();
            } catch (e) {
              $.error('Received date is in a non supported format!');
              return false;
            }
          }
          return date;
        }
        
        if(typeof date == 'undefined') date = new Date(0);
        
        if(desired_format != 'string' && desired_format != 'object' && desired_format != 'number')
          $.error('Date format "'+ desired_format +'" not supported!');
        
        if(!dateFormat) {
          // thanks to bibendus83 -> http://sourceforge.net/tracker/index.php?func=detail&aid=3213174&group_id=358205&atid=1495382
          var dp_dateFormat = $this.datepicker('option', 'dateFormat');
          if (dp_dateFormat) {
            dateFormat = dp_dateFormat;
          } else {
            dateFormat = $.datepicker._defaults.dateFormat;
          }
        }
        
        // converts to object as a neutral format
        switch(from_format) {
          case 'object': break;
          case 'string': date = $.datepicker.parseDate(dateFormat, date); break;
          case 'number': date = new Date(date); break;
          default: $.error('Conversion from "'+ desired_format +'" format not allowed on jQuery.multiDatesPicker');
        }
        // then converts to the desired format
        switch(desired_format) {
          case 'object': return date;
          case 'string': return $.datepicker.formatDate(dateFormat, date);
          case 'number': return date.getTime();
          default: $.error('Conversion to "'+ desired_format +'" format not allowed on jQuery.multiDatesPicker');
        }
        return false;
      },
      gotDate : function( date, type ) {
        if(!type) type = 'picked';
        for(var i = 0; i < this.multiDatesPicker.dates[type].length; i++) {
          if(methods.compareDates.call(this, this.multiDatesPicker.dates[type][i], date) === 0) {
            return i;
          }
        }
        return false;
      },
      value : function( value ) {
        if(value && typeof value == 'string') {
          methods.addDates.call(this, value.split(this.multiDatesPicker.separator));
        } else {
          var dates = methods.getDates.call(this, 'string');
          return dates.length
            ? dates.join(this.multiDatesPicker.separator)
            : "";
        }
      },
      getDates : function( format, type ) {
        if(!format) format = 'string';
        if(!type) type = 'picked';
        switch (format) {
          case 'object':
            return this.multiDatesPicker.dates[type];
          case 'string':
          case 'number':
            var o_dates = new Array();
            for(var i in this.multiDatesPicker.dates[type])
              o_dates.push(
                dateConvert.call(
                  this, 
                  this.multiDatesPicker.dates[type][i], 
                  format
                )
              );
            return o_dates;
          
          default: $.error('Format "'+format+'" not supported!');
        }
      },
      addDates : function( dates, type ) {
        if(dates.length > 0) {
          if(!type) type = 'picked';
          switch(typeof dates) {
            case 'object':
            case 'array':
              if(dates.length) {
                for(var i = 0; i < dates.length; i++)
                  addDate.call(this, dates[i], type, true);
                sortDates.call(this, type);
                break;
              } // else does the same as 'string'
            case 'string':
            case 'number':
              addDate.call(this, dates, type);
              break;
            default: 
              $.error('Date format "'+ typeof dates +'" not allowed on jQuery.multiDatesPicker');
          }
          //$(this).datepicker('refresh');
        } else {
          $.error('Empty array of dates received.');
        }
      },
      removeDates : function( dates, type ) {
        if(!type) type = 'picked';
        var removed = [];
        if (Object.prototype.toString.call(dates) === '[object Array]') {
          for(var i in dates.sort(function(a,b){return b-a})) {
            removed.push(removeDate.call(this, dates[i], type));
          }
        } else {
          removed.push(removeDate.call(this, dates, type));
        }
        return removed;
      },
      removeIndexes : function( indexes, type ) {
        if(!type) type = 'picked';
        var removed = [];
        if (Object.prototype.toString.call(indexes) === '[object Array]') {
          for(var i in indexes.sort(function(a,b){return b-a})) {
            removed.push(removeIndex.call(this, indexes[i], type));
          }
        } else {
          removed.push(removeIndex.call(this, indexes, type));
        }
        return removed;
      },
      resetDates : function ( type ) {
        if(!type) type = 'picked';
        this.multiDatesPicker.dates[type] = [];
      },
      toggleDate : function( date, type ) {
        if(!type) type = 'picked';
        
        switch(this.multiDatesPicker.mode) {
          case 'daysRange':
            this.multiDatesPicker.dates[type] = []; // deletes all picked/disabled dates
            var end = this.multiDatesPicker.autoselectRange[1];
            var begin = this.multiDatesPicker.autoselectRange[0];
            if(end < begin) { // switch
              end = this.multiDatesPicker.autoselectRange[0];
              begin = this.multiDatesPicker.autoselectRange[1];
            }
            for(var i = begin; i < end; i++) 
              methods.addDates.call(this, methods.sumDays.call(this,date, i), type);
            break;
          default:
            if(methods.gotDate.call(this, date) === false) // adds dates
              methods.addDates.call(this, date, type);
            else // removes dates
              methods.removeDates.call(this, date, type);
            break;
        }
      }, 
      setMode : function( options ) {
        var $this = $(this);
        if(options.mode) this.multiDatesPicker.mode = options.mode;
        
        switch(this.multiDatesPicker.mode) {
          case 'normal':
            for(option in options)
              switch(option) {
                case 'maxPicks':
                case 'minPicks':
                case 'pickableRange':
                case 'adjustRangeToDisabled':
                  this.multiDatesPicker[option] = options[option];
                  break;
                //default: $.error('Option ' + option + ' ignored for mode "'.options.mode.'".');
              }
          break;
          case 'daysRange':
          case 'weeksRange':
            var mandatory = 1;
            for(option in options)
              switch(option) {
                case 'autoselectRange':
                  mandatory--;
                case 'pickableRange':
                case 'adjustRangeToDisabled':
                  this.multiDatesPicker[option] = options[option];
                  break;
                //default: $.error('Option ' + option + ' does not exist for setMode on jQuery.multiDatesPicker');
              }
            if(mandatory > 0) $.error('Some mandatory options not specified!');
          break;
        }
        
        /*
        if(options.pickableRange) {
          $this.datepicker("option", "maxDate", options.pickableRange);
          $this.datepicker("option", "minDate", this.multiDatesPicker.minDate);
        }
        */
        
        if(mdp_events.onSelect)
          mdp_events.onSelect();
      },
      destroy: function(){
        this.multiDatesPicker = null;
        $(this).datepicker('destroy');
      }
    };
    
    this.each(function() {
      var $this = $(this);
      if (!this.multiDatesPicker) {
        this.multiDatesPicker = {
          dates: {
            picked: [],
            disabled: []
          },
          mode: 'normal',
          adjustRangeToDisabled: true
        };
      }
      
      if(methods[method]) {
        var exec_result = methods[method].apply(this, Array.prototype.slice.call(mdp_arguments, 1));
        switch(method) {
          case 'removeDates':
          case 'removeIndexes':
          case 'resetDates':
          case 'toggleDate':
          case 'addDates':
            var altField = $this.datepicker('option', 'altField');
            // @todo: should use altFormat for altField
            var dates_string = methods.value.call(this);
            if (altField !== undefined && altField != "") {
              $(altField).val(dates_string);
            }
            $this.val(dates_string);
            
            $.datepicker._refreshDatepicker(this);
        }
        switch(method) {
          case 'removeDates':
          case 'getDates':
          case 'gotDate':
          case 'sumDays':
          case 'compareDates':
          case 'dateConvert':
          case 'value':
            ret = exec_result;
        }
        return exec_result;
      } else if( typeof method === 'object' || ! method ) {
        return methods.init.apply(this, mdp_arguments);
      } else {
        $.error('Method ' +  method + ' does not exist on jQuery.multiDatesPicker');
      }
      return false;
    }); 
    
    return ret;
  };

  var PROP_NAME = 'multiDatesPicker';
  var dpuuid = new Date().getTime();
  var instActive;

  $.multiDatesPicker = {version: false};
  //$.multiDatesPicker = new MultiDatesPicker(); // singleton instance
  $.multiDatesPicker.initialized = false;
  $.multiDatesPicker.uuid = new Date().getTime();
  $.multiDatesPicker.version = $.ui.multiDatesPicker.version;
  
  // allows MDP not to hide everytime a date is picked
  $.multiDatesPicker._hideDatepicker = $.datepicker._hideDatepicker;
  $.datepicker._hideDatepicker = function(){
    var target = this._curInst.input[0];
    var mdp = target.multiDatesPicker;
    if(!mdp || (this._curInst.inline === false && !mdp.changed)) {
      return $.multiDatesPicker._hideDatepicker.apply(this, arguments);
    } else {
      mdp.changed = false;
      $.datepicker._refreshDatepicker(target);
      return;
    }
  };

  // Workaround for #4055
  // Add another global to avoid noConflict issues with inline event handlers
  window['DP_jQuery_' + dpuuid] = $;
})( jQuery );