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package ch.epfl.maze.physical;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
/**
* Daedalus in which predators hunt preys. Once a prey has been caught by a
* predator, it will be removed from the daedalus.
*
* @author EPFL
* @author Pacien TRAN-GIRARD
*/
public final class Daedalus extends World {
private final Set<Predator> predators;
private final Set<Predator> predatorHistory;
private final Set<Prey> preys;
private final Set<Prey> preyHistory;
/**
* Constructs a Daedalus with a labyrinth structure
*
* @param labyrinth Structure of the labyrinth, an NxM array of tiles
*/
public Daedalus(int[][] labyrinth) {
super(labyrinth);
this.predators = new HashSet<>();
this.predatorHistory = new HashSet<>();
this.preys = new HashSet<>();
this.preyHistory = new HashSet<>();
}
@Override
public boolean isSolved() {
return this.preys.isEmpty();
}
/**
* Adds a predator to the daedalus.
*
* @param p The predator to add
*/
public void addPredator(Predator p) {
this.predators.add(p);
this.predatorHistory.add((Predator) p.copy());
}
/**
* Adds a prey to the daedalus.
*
* @param p The prey to add
*/
public void addPrey(Prey p) {
this.preys.add(p);
this.preyHistory.add((Prey) p.copy());
}
/**
* Removes a predator from the daedalus.
*
* @param p The predator to remove
*/
public void removePredator(Predator p) {
this.predators.remove(p);
}
/**
* Removes a prey from the daedalus.
*
* @param p The prey to remove
*/
public void removePrey(Prey p) {
this.preys.remove(p);
}
@Override
public Set<Animal> getAnimalSet() {
return Stream
.concat(this.predators.stream(), this.preys.stream())
.collect(Collectors.toSet());
}
/**
* Returns a copy of the set of all current predators in the daedalus.
*
* @return A set of all predators in the daedalus
*/
public Set<Predator> getPredatorSet() {
return new HashSet<>(this.predators);
}
/**
* Returns a copy of the list of all current predators in the daedalus.
*
* @return A list of all predators in the daedalus
* @deprecated Use @code{Set<Predator> getPredatorSet()} instead
*/
public List<Predator> getPredators() {
return new ArrayList<>(this.getPredatorSet());
}
/**
* Returns a copy of the set of all current preys in the daedalus.
*
* @return A set of all preys in the daedalus
*/
public Set<Prey> getPreySet() {
return new HashSet<>(this.preys);
}
/**
* Returns a copy of the list of all current preys in the daedalus.
*
* @return A list of all preys in the daedalus
* @deprecated Use @code{Set<Prey> getPreySet()} instead
*/
public List<Prey> getPreys() {
return new ArrayList<>(this.getPreySet());
}
/**
* Determines if the daedalus contains a predator.
*
* @param p The predator in question
* @return <b>true</b> if the predator belongs to the world, <b>false</b>
* otherwise.
*/
public boolean hasPredator(Predator p) {
return this.predators.contains(p);
}
/**
* Determines if the daedalus contains a prey.
*
* @param p The prey in question
* @return <b>true</b> if the prey belongs to the world, <b>false</b>
* otherwise.
*/
public boolean hasPrey(Prey p) {
return this.preys.contains(p);
}
@Override
public void reset() {
this.predators.clear();
this.predators.addAll(this.predatorHistory);
this.preys.clear();
this.preys.addAll(this.preyHistory);
}
}
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