////// END: hard ai functionality
/////////////////////////////////////////////////////////////////
/////////////////////////////////////////////////////////////////
////// START: very hard ai functionality
#region very hard AI
public void invokeVeryHardAI()
{
CandidateTilePos selectedPosCombo = calculateMoves(true, true, false);
if (selectedPosCombo == null) // [SC] no tiles to put on a board
// [SC] dropping a random tile
{
setSelectedTile(playerTiles.getRandomElement());
game.dropPlayerTile(playerIndex);
}
else if (getCanMove())
{
CandidateTileSeq tileSeq = selectedPosCombo.getCandidateTileSeq();
int totalMoveCount = selectedPosCombo.getComboLength();
int currMoveCount = 0;
while (currMoveCount < totalMoveCount)
{
AbstractPos abstrPos = selectedPosCombo.getAbstrPosAt(currMoveCount);
int rowIndex = abstrPos.getRowIndex();
int colIndex = abstrPos.getColIndex();
int tileIndex = abstrPos.getTileIndex();
TileZeroTile tile = tileSeq.getTileAt(tileIndex);
setSelectedTile(tile);
game.setSelectedCell(rowIndex, colIndex, playerIndex);
game.placePlayerTileOnBoard(playerIndex);
currMoveCount++;
}
}
}
private void boardPosPermTraverseTreePaths(TreeNode rootNode, List <AbstractPos> currPath, CandidateTileSeq candTileSeq, int currScore, List <CandidateTilePos> maxScorePosComboList)
{
if (rootNode.hasChildNodes())
{
List <TreeNode> childNodes = rootNode.getChildNodes();
foreach (TreeNode childNode in childNodes)
{
List <AbstractPos> newPath = currPath.listShallowClone();
AbstractPos pos = (AbstractPos)childNode.getValue();
newPath.Add(pos);
boardPosPermTraverseTreePaths(childNode, newPath, candTileSeq, currScore + pos.getScore(), maxScorePosComboList);
}
}
else // [SC] reached the final leaf; no more moves in the combo
{
if (currScore > 0)
{
CandidateTilePos newCandTilePos = new CandidateTilePos(candTileSeq, currPath, currScore);
if (maxScorePosComboList.Count == 0)
{
maxScorePosComboList.Add(newCandTilePos);
}
else if (maxScorePosComboList[0].getTotalScore() == currScore)
{
maxScorePosComboList.Add(newCandTilePos);
}
else if (maxScorePosComboList[0].getTotalScore() < currScore)
{
maxScorePosComboList.Clear();
maxScorePosComboList.Add(newCandTilePos);
}
}
}
}