// Copyright (c) 2013-2017 Software AG, Darmstadt, Germany and/or Software AG USA Inc., Reston, VA, USA

/* date value validation */

var day = 0;
var month = 0;
var year = 0;
var leap;
var state;
var valid;
var dayString;
var yearString;
var dateValue;
var dateVal;
var dateFormat;
var sDate;
var format;
var delimiter;


//main function
function dateFormatChecker(dateVal, dateFormat)
{
    if (dateVal == "")
    {
        return true;
    }

    var stateValidity = isDate(dateVal, dateFormat);
    if (stateValidity == true)
    {
        return true;
    }
    else
    {
        return false;
    }
}

// Checks the format
function isDate(dateValue, format)
{
    var caseValue = 0;
    if (format == "MM/DD/YYYY" || format == "MM/DD/RRRR")
    {
        caseValue = 1;
        delimiter = '/';
    }

    else if (format == "MM-DD-YYYY" || format == "MM-DD-RRRR")
    {
        caseValue = 1;
        delimiter = '-';
    }

    else if (format == "MM.DD.YYYY" || format == "MM.DD.RRRR")
    {
        caseValue = 1;
        delimiter = '.';
    }

    else if (format == "MM/DD/YY")
    {
        caseValue = 4;
        delimiter = '/';
    }

    else if (format == "DD/MM/YYYY")
    {
        caseValue = 2;
        delimiter = '/';
    }

    else if (format == "DD-MM-YYYY" || format == "DD-MM-RRRR")
    {
        caseValue = 2;
        delimiter = '-';
    }

    else if (format == "DD.MM.YYYY" || format == "DD.MM.RRRR")
    {
        caseValue = 2;
        delimiter = '.';
    }

    else if (format == "DD/MM/YY")
    {
        caseValue = 5;
        delimiter = '/';
    }

    else if (format == "YYYY/MM/DD")
    {
        caseValue = 3;
        delimiter = '/';
    }

    else if (format == "YYYY-MM-DD" || format == "RRRR-MM-DD")
    {
        caseValue = 3;
        delimiter = '-';
    }

    else if (format == "YYYY.MM.DD" || format == "RRRR.MM.DD")
    {
        caseValue = 3;
        delimiter = '.';
    }

    else if (format == "DD-MON-YYYY")
    {
        caseValue = 6;
        delimiter = '-';
    }
    
    else if (format == "YYYYMMDD")
    {
    	 caseValue = 7;
         delimiter = '';
    }

    else
    {
        caseValue = 100;
        delimiter = '!';
    }

    valid = isValid(caseValue, dateValue, delimiter);
    if(delimiter != ''){
    	var tempArray = dateValue.split(delimiter);
    	if (tempArray.length != 3)
    	{
    		return false;
    	}
    }
    return valid;
}


function isValid(n, sDateValue, sDelimiter)
{
    switch (n)
    {
        case 1:
            var dArr = sDateValue.split(sDelimiter); //MM DD YYYY
            month = dArr[0];
            day = dArr[1];
            year = dArr[2];
            break;

        case 2:
            var dArr = sDateValue.split(sDelimiter);  //DD MM YYYY
            day = dArr[0];
            month = dArr[1];
            year = dArr[2];
            break;

        case 3:
            var dArr = sDateValue.split(sDelimiter); //YYYY MM DD
            year = dArr[0];
            month = dArr[1];
            day = dArr[2];
            break;

        case 4:
            var dArr = sDateValue.split(sDelimiter); //MM/DD/YY
            month = dArr[0];
            day = dArr[1];
            year = "20" + dArr[2];
            break;

        case 5:
            var dArr = sDateValue.split(sDelimiter); //DD/MM/YY
            day = dArr[0];
            month = dArr[1];
            year = "20" + dArr[2];
            break;

        case 6:
            var dArr = sDateValue.split(sDelimiter); //DD-MON-YYYY
            day = dArr[0];
            month = dArr[1];
            year = dArr[2];
            state = monthList(day, month, year);
            return state;
            //break;
            
        case 7:
        	year = sDateValue.substr(0,4); //YYYYMMDD
            month = sDateValue.substr(4,2);
            day = sDateValue.substr(6,2);
            break;

        case 100:
            return false; // invalid format
    }
    var vState = valueValidator(day, month, year);
    if (vState == false)
    {
        return false;
    }
    else
    {
        state = dateValid(day, month, year);
        return state;
    }
}


//checks day,month,year seperately for invalid characters
function valueValidator(vDay, vMonth, vYear)
{
    if (month == undefined || day == undefined || year == undefined)
    {
        return false;
    }
    var numeric1 = IsNumeric(day);
    if (numeric1 == false)
    {
        return false;
    }
    var numeric2 = IsNumeric(month);
    if (numeric2 == false)
    {
        return false;
    }
    var numeric3 = IsNumeric(year);
    if (numeric3 == false)
    {
        return false;
    }
    return true;
}


 // checks if the String entered contains alphabets or special characters....
function IsNumeric(sDate)
{
    var ValidChars = "0123456789";
    var Char;
    var IsNumber = true;
    if (sDate == undefined || sDate == null || sDate == 0)
    {
        return false;
    }
    else
    {
        for (i = 0; i < sDate.length && IsNumber == true; i++)
        {
            Char = sDate.charAt(i);
            if (ValidChars.indexOf(Char) ==  - 1)
            {
                IsNumber = false;
                return IsNumber;
            }
        }
        return IsNumber;
    }
}

//checks if the entered day,month & year is valid....
function dateValid(day, month, year)
{
    if (month.length == 1)
    // if date or month is single valued,
    {
        month = "0" + month;
    } // '0' is added to it as prefix.....
    if (day.length == 1)
    // date & month are converted to standard format.
    {
        day = "0" + day;
    }

    //Day cannot be less than 1
    if (day < 1 || day > 31)
    {
        return false;
    }
    // Month should be 1<=Month<=12
    if ((month < 1) || (month > 12))
    {
       return false;
    }

    if ((day > 31) && ((month == "01") || (month == "03") || (month == "05") ||
        (month == "07") || (month == "08") || (month == "10") || (month == "12")
        ))
    {
        return false;
    }

    if ((day > 30) && ((month == "04") || (month == "06") || (month == "09") ||
        (month == "11")))
    {
        return false;
    }
    if ((year == 0) || (year.length > 4))
    {
        return false;
    }

    // Checks the Leap Year
    if ((year % 400 == 0) || (year % 4 == 0) && (year % 100 != 0))
    {
        leap = 1;
    }
    else
    {
        leap = 0;
    }
    if ((month == 2) && (leap == 1) && (day > 29))
    {
        return false;
    }
    if ((month == 2) && (leap != 1) && (day > 28))
    {
        return false;
    }
    return true;
}


// for case :12 for validating DD-MON-YYYY format
function monthList(day, month, year)
{
    if (day == undefined || month == undefined || year == undefined)
    {
        return false;
    }

    if (day.length == 1)
    {
        day = "0" + day;
    }

    var numericDay = IsNumeric(day);
    if (numericDay == false)
    {
        return false;
    }

    var numericYear = IsNumeric(year);
    if (numericYear == false)
    {
        return false;
    }

    if ("JAN" == upperCase(month))
    {
        month = "01";
    }
    else if ("FEB" == upperCase(month))
    {
        month = "02";
    }
    else if ("MAR" == upperCase(month))
    {
        month = "03";
    }
    else if ("APR" == upperCase(month))
    {
        month = "04";
    }
    else if ("MAY" == upperCase(month))
    {
        month = "05";
    }
    else if ("JUN" == upperCase(month))
    {
        month = "06";
    }
    else if ("JUL" == upperCase(month))
    {
        month = "07";
    }
    else if ("AUG" == upperCase(month))
    {
        month = "08";
    }
    else if ("SEP" == upperCase(month))
    {
        month = "09";
    }
    else if ("OCT" == upperCase(month))
    {
        month = "10";
    }
    else if ("NOV" == upperCase(month))
    {
        month = "11";
    }
    else if ("DEC" == upperCase(month))
    {
        month = "12";
    }
    else
    {
        return false;
    }

    var case12 = dateValid(day, month, year);
    return case12;
}

function upperCase(arg)
{
    return (arg.toUpperCase());
}

function validateTSFormat(dateVal, dateFormat, dataPrecision){
 if(dateVal.length > 0){
 var dateStr = dateVal.split(' ');

 if(!dateFormatChecker(dateStr[0], dateFormat)){
  return false;
 }

 var TSStr = dateStr[1];

  if(!validateTSString(TSStr.replace(' ',''), dataPrecision)){
   return false;
  }else{
   return true;
  }
 }else{
  return true;
 }

}

//00:00:00.000000000
function validateTSString(TSStr, dataPrecision){

    var TSDataArray = TSStr.split(":");

    if(isValidPositiveNumber(TSDataArray[0]) && TSDataArray[0]<60  && isValidPositiveNumber(TSDataArray[1]) && TSDataArray[1]<60 ){

     var TS3 = TSDataArray[2].split(".");

     if(isValidPositiveNumber(TS3[0]) && TS3[0]<60  && isValidPositiveNumber(TS3[1])){
    	 if(TS3[1] != null){
	    	 var valueBeyondPrecision = TS3[1].substring(dataPrecision, TS3[1].length);
    		 if(valueBeyondPrecision > 0){
    			 return false;
    	 	}
    	 }
         return true;
     }else{
         return false;
     }
    }else{
         return false;
    }
}

function isValidPositiveNumber (s){
        var bag = "0123456789";
        var i;
        var vCheck = false;

        if(s!=null){
          for (i = 0; i < s.length; i++){
                 var c = s.charAt(i);
                 if (bag.indexOf(c) == -1) return false;
          }
       }else{
                 return false;
       }

     return true;
  }