package model.comPlayer.generator;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import model.Board;
import model.Board.TileColor;
import model.CellPointer;
import model.Move;

import org.apache.log4j.Logger;

public class ValidMoveGenerator implements MoveGenerator {
	private static final Logger LOGGER = Logger
			.getLogger(ValidMoveGenerator.class.getName());

	@Override
	public Move genMove(Board board, boolean asHuman) {
		LOGGER.info("ValidMoveGenerator genMove() stub returning NONE");
		return Move.NONE;
	}

	@Override
	public List<Move> genMoves(Board board, boolean asHuman, int nMoves) {

		List<Move> validMoves = new ArrayList<Move>();

		for (int r = 0; r < Board.NUM_ROWS; r++) {
			for (int c = 0; c < Board.NUM_COLS; c++) {
				if (Board.isLegal(board, new CellPointer(r, c))) {
					for (TileColor color : TileColor.values()) {
						if (color == TileColor.NONE) {
							continue;
						}
						validMoves.add(new Move(color, r, c));
					}
				}
			}
		}

		Collections.shuffle(validMoves);

		if (nMoves == MoveGenerator.ALL_MOVES) {
			return validMoves;
		} else {
			return validMoves.subList(0, Math.min(validMoves.size(), nMoves));
		}
	}
}