(function($) {
  
  $.fn.formValidator = function(options) {
    $(this).click(function() { 
    
      // merge options with defaults
   	  var merged_options = $.extend({}, $.formValidator.defaults, options);
    
      var result = $.formValidator(merged_options);
    
      if (result && jQuery.isFunction(merged_options.onSuccess)) {
        merged_options.onSuccess();
        return false;
      } else if (!result && jQuery.isFunction(merged_options.onError)) {
        merged_options.onError();
        return false;
      } else {
        return result; 
      }
    });
  };
  
  $.formValidator = function (merged_options) {
    
    // result boolean
    var boolValid = true;
    
    // result error message
    var errorMsg = '';
    
    // clean errors
    $(merged_options.scope + ' .error-both, ' + merged_options.scope + ' .error-same, ' + merged_options.scope + ' .error-input').removeClass('error-both').removeClass('error-same').removeClass('error-input');
    
    // gather inputs & check is valid
    $(merged_options.scope+' .req-email, '+merged_options.scope+' .req-string, '+merged_options.scope+' .req-same, '+merged_options.scope+' .req-both, '+merged_options.scope+' .req-numeric, '+merged_options.scope+' .req-date, '+merged_options.scope+' .req-min').each(function() {
      thisValid = $.formValidator.validate($(this),merged_options);
      boolValid = boolValid && thisValid.error;
      if (!thisValid.error) errorMsg  = thisValid.message;
    });
    
    // check extra bool
    if (!merged_options.extraBool() && boolValid) {
      boolValid = false;
      errorMsg = merged_options.extraBoolMsg;
    }
    
    // submit form if there is and valid
    if ((merged_options.scope != '') && boolValid) {
      $(merged_options.errorDiv).fadeOut();
    }
    
    // if there is errorMsg print it if it is not valid
    if (!boolValid && errorMsg != '') {
      
      var tempErr = (merged_options.customErrMsg != '') ? merged_options.customErrMsg : errorMsg;
      $(merged_options.errorDiv).hide().html(tempErr).fadeIn();
    }
    
    return boolValid;
  };
  
  $.formValidator.validate = function(obj,opts) {
    var valAttr = (obj.val() == obj.attr('title')) ? '' : obj.val();
    var css = opts.errorClass;
    var mail_filter = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
    var numeric_filter = /(^-?\d\d*\.\d*$)|(^-?\d\d*$)|(^-?\.\d\d*$)|(^-?\d*$)/;
    var tmpresult = true;
    var result = true;
    var errorTxt = '';
    
    // REQUIRED FIELD VALIDATION
    if (obj.hasClass('req-string')) {
      tmpresult = (valAttr != '') && (valAttr != obj.attr('title'));
      if (!tmpresult) errorTxt = opts.errorMsg.reqString;
      result = result && tmpresult;
    }
    // SAME FIELD VALIDATION
    if (obj.hasClass('req-same')) {
      
      tmpresult = true;
      
      group = obj.attr('rel');
      tmpresult = true;
      $(opts.scope+' .req-same[rel="'+group+'"]').each(function() { 
        if($(this).val() != valAttr || valAttr == '') {
          tmpresult = false;
        }
      });
      if (!tmpresult && !opts.silent) {
        $(opts.scope+' .req-same[rel="'+group+'"]').parent().parent().addClass('error-same');
        errorTxt = opts.errorMsg.reqSame;
      } else {
        $(opts.scope+' .req-same[rel="'+group+'"]').parent().parent().removeClass('error-same');
      }
      
      result = result && tmpresult;
    }
    // BOTH INPUT CHECKING
    // if one field entered, the others should too.
    if (obj.hasClass('req-both')) {
      
      tmpresult = true;
      
      if (valAttr != '') {
        
        group = obj.attr('rel');

        $(opts.scope+' .req-both[rel="'+group+'"]').each(function() { 
          if($(this).val() == '') {
            tmpresult = false;
          }
        });
        
        if (!tmpresult && !opts.silent) {
          $(opts.scope+' .req-both[rel="'+group+'"]').parent().parent().addClass('error-both');
          errorTxt = opts.errorMsg.reqBoth;
        } else {
          $(opts.scope+' .req-both[rel="'+group+'"]').parent().parent().removeClass('error-both');
        }
      }
      
      result = result && tmpresult;
    }
    // E-MAIL VALIDATION
    if (obj.hasClass('req-email')) {
      tmpresult = mail_filter.test(valAttr);
      if (!tmpresult) errorTxt = (valAttr == '') ? opts.errorMsg.reqMailEmpty : opts.errorMsg.reqMailNotValid;
      result = result && tmpresult;
    }
    // DATE VALIDATION
    if (obj.hasClass('req-date')) {
      
      tmpresult = true;
      
      var arr = valAttr.split(opts.dateSeperator);
      var curDate = new Date();
      
      if (valAttr == '') {
        
        tmpresult = true;
      } else {
        
        if (arr.length < 3) {
          tmpresult = false;
        } else {
          tmpresult = (arr[0] <= 31) && (arr[1] <= 12) && (arr[2] <= curDate.getFullYear());
        }
      }
      
      if (!tmpresult) errorTxt = opts.errorMsg.reqDate;
      result = result && tmpresult;
    }
    // MINIMUM REQUIRED FIELD VALIDATION
    if (obj.hasClass('req-min')) {
      tmpresult = (valAttr.length >= obj.attr('minlength'));
      if (!tmpresult) errorTxt = opts.errorMsg.reqMin.replace('%1',obj.attr('minlength'));
      result = result && tmpresult;
    }
    // NUMERIC FIELD VALIDATION
    if (obj.hasClass('req-numeric')) {
      tmpresult = numeric_filter.test(valAttr);
      if (!tmpresult) errorTxt = opts.errorMsg.reqNum;
      result = result && tmpresult;
    }
    
    if (obj.attr('rel')) {
      if (result) { $('#'+obj.attr('rel')).removeClass(css); } else if(!opts.silent) { $('#'+obj.attr('rel')).addClass(css); }
    } else {
      if (result) { 
        if (opts.errorTarget != '') obj.parents(opts.errorTarget).removeClass(css); else obj.removeClass(css); 
      } else { 
        if (opts.errorTarget != '') obj.parents(opts.errorTarget).addClass(css); else obj.addClass(css); 
      }
    }
    
    return {
      error: result,
      message: errorTxt
    };
  };
  
  // CUSTOMIZE HERE or overwrite by sending option parameter
  $.formValidator.defaults = {
    silent      : false,
    onSuccess   : null,
    onError     : null,
    scope       : '',
    errorTarget : '',
    errorClass  : 'error-input',
    errorDiv    : '#warn',
    errorMsg    :   {
					reqString		:	'Este campo não pode ser vazio',
					reqDate			:	'Data inválida, utilize dd/mm/aaaa',
					reqNum			:	'Neste campo só é permitido números',
					reqMailNotValid	:	'E-mail inválido',
					reqMailEmpty	:	'E-mail n&amp;atilde;o pode ser em branco',
					reqSame			:	'Preencha corretamente os campos',
					reqBoth			:	'Voc&ecirc; n&amp;atilde;o preencheu corretamente os campos do formul&amp;aacute;rio',
					reqMin			:	'Este campo requer no m&iacute;nimo %1 caracter(es)'
              },
    customErrMsg  : '',
    extraBoolMsg  : 'Por favor confira o formulario!',
    dateSeperator : '.',
    extraBool   : function() { return true; }
  };
})(jQuery);

// FORM VALIDATOR JQUERY PLUGIN - END