/**
 * jQuery Idealgewicht plugin
 *
 * @name jquery-idealweight-1.1.js
 * @author Rocco Wernicke - http://r-wernicke.de
 * @version 1.1
 * @date Februar 28, 2017
 * @category jQuery plugin
 * @copyright (c) 2017 Rocco Wernicke
 */
(function (factory)
{
  if (typeof define === 'function' && define.amd)
  {
    // AMD
    define(['jquery'], factory);
  }
  else if (typeof module === 'object' && module.exports)
  {
    factory(require('jquery'));
  }
  else
  {
    // Browser globals
    factory(jQuery);
  }
}(function ($)
{
  "use strict";

  $.fn.idealweight = function (options)
  {
    var config = {
      //css-class for result
      output: 'result',
      //name-attribute for inputs
      weight: 'iWeight',
      size: 'iSize',
      button: 'btnCalc',
      reset: 'btnReset',
      //name for radio-input
      gender: 'sGender',
      //css-class for span
      genderMsg: 'gender-msg',
      weightMsg: 'weight-msg',
      sizeMsg: 'size-msg'
    };

    $.extend(config, options);

    var $sOutput = $('.' + config.output);
    var $iWeight = $('input[name="' + config.weight + '"]');
    var $iSize = $('input[name="' + config.size + '"]');
    var $button = $('button[name="' + config.button + '"]');
    var $btnReset = $('button[name="' + config.reset + '"]');
    var $sGenderMsg = $('.' + config.genderMsg);
    var $sWeightMsg = $('.' + config.weightMsg);
    var $sSizeMsg = $('.' + config.sizeMsg);

    $sGenderMsg.hide();
    $sWeightMsg.hide();
    $sSizeMsg.hide();

    var _$iWeigth;
    var _$iSize;
    var _$sGender;

    $iWeight.focusin(function ()
    {
      if (_CheckGender() == false)
      {
        $sOutput.html('Bitte Ihr Geschlecht angeben!').css('color', 'brown');
      }
      else
      {
        $sOutput.html("");
      }
    });

    $iWeight.focusout(function ()
    {
      if (_checkWeight() == false)
      {
        $sOutput.html('Bitte Ihr Gewicht angeben!').css("color", "brown");
      }
    });

    $iSize.focusout(function ()
    {
      if (_checkSize() == false)
      {
        $sOutput.html("Bitte Ihre Größe angeben!").css("color", "brown");
      }
    });


    $button.on("click", function (e)
    {
      //e.preventDefault();
      var normalgewicht;
      var idealgewicht;
      var gender;

      if (_CheckGender() == false || _checkSize() == false || _checkWeight() == false)
      {
        $sOutput.html("Bitte alles ausfühlen.").css("color", "brown");
        return false;
      }
      else
      {
        $sOutput.html("");

        if (_$sGender == 'm')
        {
          idealgewicht = _IdealMan(_$iSize);
          normalgewicht = _Normal(_$iSize);
          gender = "m";
        }
        else if (_$sGender == 'w')
        {
          idealgewicht = _IdealWoman(_$iSize);
          normalgewicht = _Normal(_$iSize);
          gender = "w";
        }


        var _$sString = "
"
                + "Derzeitiges Gewicht: " + _$iWeigth + " kg
"
                + "Normalgewicht:  " + normalgewicht + " kg
"
                + "Idealgwicht: "
                + idealgewicht + " kg
"
                + _checkDifNorml(gender, _$iWeigth, _$iSize) + "
"
                + "Ihr BMI beträgt: " + _bmi(_$iSize, _$iWeigth)
                + "
";


        $sOutput.html(_$sString).css("color", "black");

      }
    });


    $btnReset.on("click", function ()
    {
      $('input:radio[name="' + config.gender + '"]').prop('checked', false);
      $iWeight.val("");
      $iSize.val("");
      $sGenderMsg.hide();
      $sWeightMsg.hide();
      $sSizeMsg.hide();
      $sOutput.hide();
    });



    /***
     * wurde ein das Geschlecht gewählt
     * @returns Boolean
     */
    function _CheckGender()
    {
      if ($("input:radio[name='" + config.gender + "']:checked").val() == 'm' || $("input:radio[name='" + config.gender + "']:checked").val() == 'w')
      {
        $sGenderMsg.show("slow");
        _$sGender = $('input:radio[name="' + config.gender + '"]:checked').val();
        return true;
      }
      else
      {
        return false;
      }
    }

    /**
     * input fuer groesse und gewicht validieren
     * @returns {boolean}
     * */
    function _checkSize()
    {
      var size = parseInt($iSize.val());

      if (size == '' || isNaN(size))
      {
        return false;
      }
      else
      {
        _$iSize = size;
        $sSizeMsg.show("slow");
        return true;
      }
    }

    function _checkWeight()
    {
      var weight = parseInt($iWeight.val());

      if (weight == '' || isNaN(weight))
      {
        return false;
      }
      else
      {
        _$iWeigth = weight;
        $sWeightMsg.show("slow");
        return true;
      }
    }

    /**
     * gender
     *  man = m
     *  woman = w
     * */
    function _checkDifNorml(sGender, iWeight, iSize)
    {
      var normal = _Normal(iSize);
      var iDif;
      var sStr;
      var ideal;
      var iIdealDif;
      var sStr2;

      if (normal > iWeight)
      {
        iDif = normal - iWeight;
        sStr = 'unter';
      }
      else
      {
        iDif = iWeight - normal;
        sStr = 'über';
      }

      if (sGender == 'w')
      {
        ideal = _IdealWoman(iSize);
      }
      else if (sGender == 'm')
      {
        ideal = _IdealMan(iSize);
      }

      if (ideal > iWeight)
      {
        iIdealDif = ideal - iWeight;
        sStr2 = "unter";
      }
      else
      {
        iIdealDif = iWeight - ideal;
        sStr2 = 'über';
      }



      return  "Ihr derzeitiges Gewicht von " + iWeight
              + " kg liegt mit " + iDif + " kg "
              + sStr + " dem Normalgwicht von " + normal + " kg, " + "
"
              + " und mit " + iIdealDif + " kg " + sStr2 + " Ihren Idealgewicht von " + ideal + " kg.";
    }


    function _bmi(iSize, iWeight)
    {
      var iBmi = iWeight / ((iSize / 100) * (iSize/ 100));
      var iResult = iBmi.toFixed(1);
      return iResult;
    }

    function _Normal(iSize)
    {
      var normal = iSize - 100;
      return normal;
    }

    function _IdealMan(iSize)
    {
      var ideal = (iSize - 100) * 0.9;
      return ideal.toFixed(0);
    }

    function _IdealWoman(iSize)
    {
      var ideal = (iSize - 100) * 0.85;
      return ideal.toFixed(0);
    }
  };


}));