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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 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;
/**
* Create a new single stone stone set
*
* @param stone
* single stone of the set
*/
public StoneSet(Stone stone) {
stones = Collections.singletonList(stone);
}
/**
* Create a stone set from a list of stones
*
* @param stones
* list of stones to build a set of
*/
public StoneSet(List<Stone> stones) {
this.stones = new ArrayList<Stone>(stones);
}
/** Validity type of the set */
public enum Type {
/** Set is a valid group */
GROUP,
/** Set is a valid run */
RUN,
/** Set is invalid */
INVALID
}
/**
* Test for rule conflict within the StoneSet
*
* @return true when the set is valid according to the rules
*/
public boolean isValid(GameSettings settings) {
return classify(settings).getFirst() != 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 Pair<Type, Integer> classify(GameSettings settings) {
if (stones.size() < 3) {
return new Pair<Type, Integer>(INVALID, 0);
}
int nonJoker = -1;
for (int i = 0; i < stones.size(); i++) {
if (stones.get(i).isJoker()) {
continue;
}
nonJoker = i;
}
if (nonJoker == -1) {
if (stones.size() > settings.getHighestValue()) {
return new Pair<Type, Integer>(INVALID, 0);
} else if (stones.size() > settings.getStoneColors().size()) {
return new Pair<Type, Integer>(
RUN,
(settings.getHighestValue() * (settings.getHighestValue() + 1))
/ 2
- (stones.size() - settings.getHighestValue())
* (stones.size() - settings.getHighestValue() - 1)
/ 2);
} else {
return new Pair<Type, Integer>(GROUP, stones.size()
* settings.getHighestValue());
}
}
int runScore = isValidRun(nonJoker, settings);
int groupScore = isValidGroup(stones.get(nonJoker).getValue(), settings);
if (runScore > groupScore) {
return new Pair<Type, Integer>(RUN, runScore);
} else if (groupScore == 0) {
return new Pair<Type, Integer>(INVALID, 0);
} else {
return new Pair<Type, Integer>(GROUP, groupScore);
}
}
/**
* Test for rule conflict within the StoneSet, assuming we have a run
*
* @param referencePosition
* position of stone used as reference (any non-joker stone)
* @param settings
*/
private int isValidRun(int referencePosition, GameSettings settings) {
StoneColor runColor = stones.get(referencePosition).getColor();
int startValue = stones.get(referencePosition).getValue()
- referencePosition;
int endValue = startValue + stones.size() - 1;
if (startValue < 1 || endValue > settings.getHighestValue()) {
return 0;
}
for (int i = 0; i < stones.size(); i++) {
if (stones.get(i).isJoker()) {
continue;
}
if (stones.get(i).getColor() != runColor) {
return 0;
}
if (stones.get(i).getValue() != i + startValue) {
return 0;
}
}
int value = 0;
for (int i = 0; i < stones.size(); i++) {
value += startValue + i;
}
return value;
}
/**
* Test for rule conflict within the StoneSet, assuming we have a group
*
* @param settings
*/
private int isValidGroup(int value, GameSettings settings) {
if (stones.size() > settings.getStoneColors().size()) {
return 0;
}
Set<StoneColor> seenColors = new HashSet<StoneColor>();
for (Stone i : stones) {
if (i.isJoker()) {
continue;
}
if (i.getValue() != value) {
return 0;
}
if (seenColors.contains(i.getColor())) {
return 0;
} else {
seenColors.add(i.getColor());
}
}
return value * stones.size();
}
/**
* 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 UnsupportedOperationException();
}
};
}
@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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