// Relization of the function that still doesn't implement in IE


// Declaring valid date character, minimum year and maximum year
var dtCh= "/";
var minYear=2008;
var maxYear=2020;

function isInteger(s){
	var i;
    for (i = 0; i < s.length; i++){   
        // Check that current character is number.
        var c = s.charAt(i);
        if (((c < "0") || (c > "9"))) return false;
    }
    // All characters are numbers.
    return true;
}

function stripCharsInBag(s, bag){
	var i;
    var returnString = "";
    // Search through string's characters one by one.
    // If character is not in bag, append to returnString.
    for (i = 0; i < s.length; i++){   
        var c = s.charAt(i);
        if (bag.indexOf(c) == -1) returnString += c;
    }
    return returnString;
}

function daysInFebruary (year){
	// February has 29 days in any year evenly divisible by four,
    // EXCEPT for centurial years which are not also divisible by 400.
    return (((year % 4 == 0) && ( (!(year % 100 == 0)) || (year % 400 == 0))) ? 29 : 28 );
}
function DaysArray(n) {
	for (var i = 1; i <= n; i++) {
		this[i] = 31
		if (i==4 || i==6 || i==9 || i==11) {this[i] = 30}
		if (i==2) {this[i] = 29}
   } 
   return this;
}

function isDateValue(dtStr){
	var daysInMonth = DaysArray(12)
	var pos1=dtStr.indexOf(dtCh)
	var pos2=dtStr.indexOf(dtCh,pos1+1)
	var strMonth=dtStr.substring(0,pos1)
	var strDay=dtStr.substring(pos1+1,pos2)
	var strYear=dtStr.substring(pos2+1)
	strYr=strYear
	if (strDay.charAt(0)=="0" && strDay.length>1) strDay=strDay.substring(1)
	if (strMonth.charAt(0)=="0" && strMonth.length>1) strMonth=strMonth.substring(1)
	for (var i = 1; i <= 3; i++) {
		if (strYr.charAt(0)=="0" && strYr.length>1) strYr=strYr.substring(1)
	}
	month=parseInt(strMonth)
	day=parseInt(strDay)
	year=parseInt(strYr)
	if (pos1==-1 || pos2==-1){
		alert("The date format should be : mm/dd/yyyy")
		return false
	}
	if (strMonth.length<1 || month<1 || month>12){
		alert("Please enter a valid month")
		return false
	}
	if (strDay.length<1 || day<1 || day>31 || (month==2 && day>daysInFebruary(year)) || day > daysInMonth[month]){
		alert("Please enter a valid day")
		return false
	}
	if (strYear.length != 4 || year==0 || year<minYear || year>maxYear){
		alert("Please enter a valid 4 digit year between "+minYear+" and "+maxYear)
		return false
	}
	if (dtStr.indexOf(dtCh,pos2+1)!=-1 || isInteger(stripCharsInBag(dtStr, dtCh))==false){
		alert("Please enter a valid date")
		return false
	}
  return true
}

function isTimeIntervalValid(startDate, startTime, endDate, endTime) {
	var utcStartTime = Date.parse(startDate.attr("value") + " " + startTime.attr("value"));
	var utcEndTime = Date.parse(endDate.attr("value") + " " + endTime.attr("value"));
	
	return (utcStartTime < utcEndTime);
}

function isDateValid() {
  var startDate = $("#edit-startdate");
  var endDate   = $("#edit-enddate");
	var startTime = $("#edit-starttime");
  var endTime   = $("#edit-endtime");
	
	if (startDate.attr("value") == "") {
		alert("Please enter start date");
		return false;
	}
	
	if (endDate.attr("value") == "") {
		alert("Please enter end date");
		return false;
	}
	
	if (isDateValue(startDate.attr("value"))==false){
		startDate.focus();
		return false;
	}
	  
	if (isDateValue(endDate.attr("value"))==false){
		endDate.focus();
		return false;
	}
	
	if (!isTimeIntervalValid(startDate, startTime, endDate, endTime)) {
		alert("Please enter a valid time interval");
		return false;
	}
	
	return true;
}

function updateDates() {
  isDateValid();
  updateWithSpecialRates();
}

function updateWithSpecialRates() {
  
  id = $("#edit-parking-id");
  if (id.length == 0) {return false;} // Return empty if no parking id present.
  
  
  start = $("#edit-startdate").attr("value");
  end = $("#edit-enddate").attr("value");
  pid = $("#edit-parking-id").attr("value");

  $.get(
  '/ajax/parking/check-special-rates?pid='+pid+'&start='+start+'&end='+end+'&as_selects=1',
  {},
  function(data) {
    if(data) {
      //Update the type select with new price data.
      //alert(data);
      insert = '<div class="form-item"><select name="parking_type" class="form-select" id="edit-parking-type" >' + data + '</select></div>';
      //alert(insert);
      $('#parking-type-wrapper').html(insert);
    }
  });
  
  return false;
}

function updateEndDate() {
  
  var startDate = $("#edit-startdate");
  var endDate   = $("#edit-enddate");
	var startTime = $("#edit-starttime");
  var endTime   = $("#edit-endtime");
  
  if (!isTimeIntervalValid(startDate, startTime, endDate, endTime)) {
    var enddate = new Date();
    var start = $("#edit-startdate").attr("value");
    var endtime = Date.parse(start) + 86400000;
    enddate.setTime(endtime);
  
    var end = (enddate.getMonth()+1) +'/'+ enddate.getDate()+'/'+ enddate.getFullYear();
    $("#edit-enddate").val(end);
  }
  
  return;
}