private int[] ImpossibleValues(int[] possibleValues)
{
ValuesPool numbers = new ValuesPool();
foreach (var value in possibleValues)
{
numbers.MakeUnavailable(value);
}
return(numbers.GetAvailableValues().ToArray());
}
public IEnumerable <int> GetImpossibleValuesForCell(Board board, Cell cellChecked)
{
foreach (var thermometer in Thermometers)
{
var themoDataForCellChecked = thermometer.GetDataForCell(cellChecked);
if (themoDataForCellChecked != null)
{
#region Sequencial thermometer (unusual)
// This code was created for sequencial thermometers (1, 2, 3...).
// Thermometers usually are not sequencial, they just need to get bigger (2, 4, 8...)
/*
* // Check if any cell inside the thermometer is already set - this should define the entire sequence of the thermometer
* bool sequenceIsFixed = false;
* foreach (var thermoData in thermometer.CoordinateDatas)
* {
* var cellFromThermometer = board.CellsByRow[thermoData.Row].First(boardCell => boardCell.Column == thermoData.Column);
*
* if(cellFromThermometer.CurrentNumber.HasValue)
* {
* // If any cell inside the thermometer already has a value defined, all the numbers that don't satisfy the sequence are impossible
* int onlyValidNumber;
*
* int difference = thermoData.SequenceIndex - themoDataForCellChecked.SequenceIndex;
* if (difference < 0) difference = -difference;
*
* if (thermoData.SequenceIndex > themoDataForCellChecked.SequenceIndex)
* onlyValidNumber = cellFromThermometer.CurrentNumber.Value - difference;
* else
* onlyValidNumber = cellFromThermometer.CurrentNumber.Value + difference;
*
* foreach (var impossibleNumber in new AvailableValues().MakeUnavailable(onlyValidNumber).GetAvailableValues())
* yield return impossibleNumber;
*
* sequenceIsFixed = true;
* break;
* }
* }
*
* if (!sequenceIsFixed)
* {
* foreach (var value in themoDataForCellChecked.ImpossibleValues)
* {
* yield return value;
* }
* }
*/
#endregion
foreach (var thermoData in thermometer.CoordinateDatas)
{
var cellFromThermometer = board.GetCell(cellChecked.Row, cellChecked.Column);
if (cellFromThermometer.CurrentNumber.HasValue)
{
var validNumbers = new ValuesPool();
if (themoDataForCellChecked.SequenceIndex < thermoData.SequenceIndex)
{
validNumbers.MakeUnavailableIfBiggerThan(cellFromThermometer.CurrentNumber.Value);
}
else
{
validNumbers.MakeUnavailableIfSmallerThan(cellFromThermometer.CurrentNumber.Value);
}
validNumbers.MakeUnavailable(cellFromThermometer.CurrentNumber.Value);
// Method return invalid numbers
foreach (var impossibleValues in validNumbers.CreateReverse().GetAvailableValues())
{
yield return(impossibleValues);
}
break;
}
}
foreach (var value in themoDataForCellChecked.ImpossibleValues)
{
yield return(value);
}
}
}
}
