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package jrummikub.model;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import sun.reflect.generics.reflectiveObjects.NotImplementedException;
import jrummikub.util.Pair;
import static jrummikub.model.StoneSet.Type.*;
/** Class managing {@link Stone}s joined together to form sets */
public class StoneSet implements Iterable<Stone>, Sizeable {
static final float VERTICAL_BORDER = 0.5f;
static final float HORIZONTAL_BORDER = 0.125f;
private List<Stone> stones;
public StoneSet(Stone stone) {
stones = Collections.singletonList(stone);
}
public StoneSet(List<Stone> stones) {
this.stones = new ArrayList<Stone>(stones);
}
public enum Type {
GROUP, RUN, INVALID
}
/**
* Test for rule conflict within the StoneSet
*
* @return true when the set is valid according to the rules
*/
public boolean isValid() {
return classify() != INVALID;
}
/**
* Test for rule conflict within the StoneSet and determine whether the set is
* a group or a run
*
* @return GROUP or RUN for valid sets, INVALID otherwise
*/
public Type classify() {
// TODO: extend this for score calculation (release 2...)
if (stones.size() < 3) {
return INVALID;
}
int nonJoker1 = -1, nonJoker2 = -1;
for (int i = 0; i < stones.size(); i++) {
if (stones.get(i).isJoker()) {
continue;
}
nonJoker2 = nonJoker1;
nonJoker1 = i;
}
if (nonJoker2 == -1) {
return GROUP;
}
// is run
if (stones.get(nonJoker1).getColor() == stones.get(nonJoker2).getColor()) {
return isValidRun(nonJoker1) ? RUN : INVALID;
}
// is group
else {
return isValidGroup(stones.get(nonJoker1).getValue()) ? GROUP : INVALID;
}
}
/**
* Test for rule conflict within the StoneSet, assuming we have a run
*
* @param referencePosition
* position of stone used as reference (any non-joker stone)
*/
private boolean isValidRun(int referencePosition) {
StoneColor runColor = stones.get(referencePosition).getColor();
int startValue = stones.get(referencePosition).getValue()
- referencePosition;
int endValue = startValue + stones.size() - 1;
if (startValue < 1 || endValue > 13) {
return false;
}
for (int i = 0; i < stones.size(); i++) {
if (stones.get(i).isJoker()) {
continue;
}
if (stones.get(i).getColor() != runColor) {
// warum macht er das nicht?
return false;
}
if (stones.get(i).getValue() != i + startValue) {
return false;
}
}
return true;
}
/**
* Test for rule conflict within the StoneSet, assuming we have a group
*/
private boolean isValidGroup(int value) {
if (stones.size() > 4) {
return false;
}
Set<StoneColor> seenColors = new HashSet<StoneColor>();
for (Stone i : stones) {
if (i.isJoker()) {
continue;
}
if (i.getValue() != value) {
return false;
}
if (seenColors.contains(i.getColor())) {
return false;
} else {
seenColors.add(i.getColor());
}
}
return true;
}
/**
* Splits the StoneSet at a specified {@link Position} and returns two new
* Stone Sets
*
* @param position
* Splitting {@link Position}
* @return A pair of StoneSets, one for each split part
*/
public Pair<StoneSet, StoneSet> splitAt(int position) {
if (position == 0) {
return new Pair<StoneSet, StoneSet>(null, this);
} else if (position == stones.size()) {
return new Pair<StoneSet, StoneSet>(this, null);
}
StoneSet firstSet = new StoneSet(stones.subList(0, position));
StoneSet secondSet = new StoneSet(stones.subList(position, stones.size()));
return new Pair<StoneSet, StoneSet>(firstSet, secondSet);
}
/**
* Joins StoneSet to another StoneSet and returns the resulting new StoneSet
*
* @param other
* StoneSet to be joined to active StoneSet
* @return the combined StoneSet
*/
public StoneSet join(StoneSet other) {
List<Stone> joinedList = new ArrayList<Stone>();
joinedList.addAll(stones);
joinedList.addAll(other.stones);
return new StoneSet(joinedList);
}
/**
* Returns the number of stones in the set.
*
* @return number of stones
*/
public int size() {
return stones.size();
}
/**
* Returns the i-th stone of the set (starting with 0)
*
* @param i
* number of the stone to return
* @return the i-th stone
*/
public Stone get(int i) {
return stones.get(i);
}
@Override
public Iterator<Stone> iterator() {
final Iterator<Stone> it = stones.iterator();
return new Iterator<Stone>() {
@Override
public boolean hasNext() {
return it.hasNext();
}
@Override
public Stone next() {
return it.next();
}
@Override
public void remove() {
// removing stones is impossible
throw new NotImplementedException();
}
};
}
@Override
public float getWidth() {
return stones.size() + 2 * VERTICAL_BORDER;
}
@Override
public float getHeight() {
return 1 + 2 * HORIZONTAL_BORDER;
}
@Override
public String toString() {
String ret = "StoneSet[";
boolean first = true;
for (Stone stone : stones) {
if (!first)
ret += ",";
ret += stone.toString();
first = false;
}
return ret + "]";
}
}
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