//global variable needed later
var NumItemsOnTest:int=30;
var i:int;

//vars for data array.  will be used in initialization
var numCols:int, numRows:int, fillValue:String, DataArray:Array;
var HeaderRow = "ExperimentName,ExperimentVersion,SubjectNumber,SubjectNumberLong,Sex,Age,Date,TimeStart,ExpTimeToEndSeconds,OptionToWitholdResponse,DistractorDuration,TEST_CONDITION,ItemCode,ItemType,WhichItemLinkedTo,Lure_SimilarDissimilar,OriginalFirstOrSecond,StudyDuration,StudyOrder,TestOrder,OriginalOnLeftOrRight,AlternateItemCode,IsTargetPresent,SubjectResponse_SingleItem,SubjectResponse_2AFC,RT_SubjectResponse,SubjectConfidence,RT_SubjectConfidence,SubjectReportOrNot,RT_SubjectReportOrNot,ResponseCorrect_SingleItem,ResponseType_SingleItem,ResponseCorrect_2AFC,CorrectlyWithheldOnTargetAbsentTrial,FinalQresponse";
var HeaderArray = HeaderRow.split(","); //Will use ".indexof" with this header array throughout the exp to get appropriate column numbers.  for example: HeaderArray.indexOf("StudyOrder")






//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// INITIALIZE 2D DATA ARRAY
// Note: EVERYTHING in this array will be strings.  Even the numbers.  So, 3 will be entered as "3".

numCols = HeaderArray.length;
fillValue = "NA";
numRows = NumItemsOnTest+1; //+1 because the header row is included in the array (as row 0)
DataArray = new Array();

//fill all cells with "NA" to begin
for (i = 0; i < numRows; i++) {
  DataArray.push(new Array());
  for (j = 0; j < numCols; j++) {
    DataArray[i].push(fillValue);
  }
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//fill some initial values, that have already been declared elsewhere
DataArray[0]=HeaderArray;  //this sets the first row of the data array to be the header row.

for (i = 1; i<numRows; i++) //start at 1 instead of 0 bc we don't want to overwrite the header row
{
	DataArray[i][HeaderArray.indexOf("ExperimentName")] = ExperimentName;
	DataArray[i][HeaderArray.indexOf("ExperimentVersion")] = ExperimentVersion;
	DataArray[i][HeaderArray.indexOf("SubjectNumber")] = SubjectNumber;
	DataArray[i][HeaderArray.indexOf("SubjectNumberLong")] = SubjectNumberLong;
	DataArray[i][HeaderArray.indexOf("Sex")] = SubjectSex;
	DataArray[i][HeaderArray.indexOf("Age")] = SubjectAge;
	DataArray[i][HeaderArray.indexOf("Date")] = todaysDate.toDateString();
	DataArray[i][HeaderArray.indexOf("TimeStart")] = todaysDate.toTimeString();
	DataArray[i][HeaderArray.indexOf("OptionToWitholdResponse")] = String(OptionToWitholdResponse);	
	DataArray[i][HeaderArray.indexOf("DistractorDuration")] = String(DistractorDuration);
	DataArray[i][HeaderArray.indexOf("TEST_CONDITION")] = TEST_CONDITION;	
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Assign random study order
//Make a 1D array containing the numbers 1 through however many items there are
var StudyOrderArray:Array= new Array();
for (i=1; i<numRows; i++){StudyOrderArray.push(String(i));}

//Now shuffle it
shuffle(StudyOrderArray);

//now go through the data array and assign the study orders
for (i=1; i<numRows; i++){
	DataArray[i][HeaderArray.indexOf("StudyOrder")] = StudyOrderArray[i-1];  //i-1 because the StudyOrderArray is 0-based, whereas we're always starting with row 1 in the DataArray since it has the header row as row 0
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~



//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// ROW LOOKUP FUNCTION

//This function looks up the appropriate row number in a 2D array, given a column number and a cell value you want to find in that column.
//Note that cellValue must be a STRING, so for example "3" not 3.  also, someDataArray must be a 2D array of course.

function fxnRowLookup(cellValue:String,someDataArray:Object,colNum:int):int{	
	var tempresult:int=NaN;	
	var numRows:int=someDataArray.length;
	for(var i=1; i<numRows; i++){if(someDataArray[i][colNum]==cellValue){tempresult=i;}}		
	return tempresult;
}

//Example of use, to get the ItemCode of the next item on the test:
CurrentItemRow=fxnRowLookup(String(ItemCount+1),DataArray,HeaderArray.indexOf("TestOrder"));	
CurrentItemCode=DataArray[CurrentItemRow][HeaderArray.indexOf("ItemCode")];
	
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~	
	
	
	
	
	
	
	
// randomly shuffles elements of a 1D array	
function shuffle(a:Object):void
{
	var i:int = a.length, j:int, t;
	while (-- i)
	{
		t = a[i];
		j = Math.random() * (i + 1);
		a[i] = a[j];
		a[j] = t;
	}
}