Make nextPlayers great again

2 files changed, 144 insertions, 67 deletions

diff --git a/src/ch/epfl/xblast/server/GameState.java b/src/ch/epfl/xblast/server/GameState.java
index e75da1d..0d381db 100644
--- a/src/ch/epfl/xblast/server/GameState.java
+++ b/src/ch/epfl/xblast/server/GameState.java
@@ -165,72 +165,142 @@ public final class GameState {
      * @param speedChangeEvents the speed change events
      * @return the next player list
      */
-    private static List<Player> nextPlayers(
-            List<Player> players0,
-            Map<PlayerID, Bonus> playerBonuses,
-            Set<Cell> bombedCells1,
-            Board board1,
-            Set<Cell> blastedCells1,
-            Map<PlayerID, Optional<Direction>> speedChangeEvents) {
-        List<Player> players1 = new ArrayList<>();
-
-        for (Player player0 : players0) {
-            Optional<Direction> event = speedChangeEvents.get(player0.id());
-            // By default the path won't change
-            Sq<Player.DirectedPosition> directedPositions1 = player0.directedPositions();
-
-            // Get the (possibly) requested direction
-            Direction requestedDirection = null;
-            if (event != null) {
-                requestedDirection = event.orElse(null);
-            }
-
-            // Generate the new Sequence of Directed Positions (kinda ugly right now)
-            if (!player0.lifeState().canMove() && requestedDirection != null) { // if the player can't movex
-                directedPositions1 = Player.DirectedPosition.stopped(player0.directedPositions().head());
-            } else if (player0.direction().isParallelTo(requestedDirection)) { // if the player want to go to a parallel directionx
-                Player.DirectedPosition requestedDirectedPosition = new Player.DirectedPosition(player0.position(), requestedDirection);
-                directedPositions1 = Player.DirectedPosition.moving(requestedDirectedPosition);
-            } else if (player0.direction().isPerpendicularTo(requestedDirection)) { // if the player want to go to a perpendicular direction
-                Player.DirectedPosition nextCentralSubCell = player0.directedPositions().findFirst(dp -> dp.position().isCentral());
-                Sq<Player.DirectedPosition> toNextCentralSubCell = player0.directedPositions().takeWhile(dp -> !dp.position().isCentral());
-                Sq<Player.DirectedPosition> pastNextCentralSubCell = Player.DirectedPosition.moving(new Player.DirectedPosition(nextCentralSubCell.position(), requestedDirection));
-                directedPositions1 = toNextCentralSubCell.concat(pastNextCentralSubCell);
-            }
-
-            // Advance of one SubCell on the player's path
-            directedPositions1 = directedPositions1.tail();
-
-            // Check possible collisions and update the Sequence if necessary (kinda ugly right now)
-            Cell possiblyBlockingCell = directedPositions1.tail().findFirst(dp -> dp.position().isCentral()).position().containingCell();
-            if (!board1.blockAt(possiblyBlockingCell).canHostPlayer()) { // if block non-free
-                Sq<Player.DirectedPosition> actualDirectedPosition = Sq.repeat(1 , player0.directedPositions().head());
-                directedPositions1 = actualDirectedPosition.concat(directedPositions1); // won't move for a tick
-            } else if (bombedCells1.contains(possiblyBlockingCell) && possiblyBlockingCell.equals(player0.position().containingCell()) && player0.position().distanceToCentral() == Board.BOMB_BLOCKING_DISTANCE) {
-                Sq<Player.DirectedPosition> actualDirectedPosition = Sq.repeat(1 , player0.directedPositions().head());
-                directedPositions1 = actualDirectedPosition.concat(directedPositions1); // won't move for a tick
-            }
-
-            // Apply damages and generate a new LifeState Sequence
-            Sq<Player.LifeState> lifeStates1;
-            if (player0.lifeState().state() == Player.LifeState.State.VULNERABLE && blastedCells1.contains(directedPositions1.head().position())) {
-                lifeStates1 = player0.statesForNextLife();
-            } else {
-                lifeStates1 = player0.lifeStates().tail();
-            }
-
-            // Create the new player given the new parameters
-            Player player1 = new Player(player0.id(), lifeStates1, directedPositions1, player0.maxBombs(), player0.bombRange());
-
-            // Update the capacities of the player given the possible bonus
-            if (playerBonuses.containsKey(player0.id())) {
-                player1 = playerBonuses.get(player0.id()).applyTo(player1);
-            }
-
-            // Add the newly generated player to the returned list
-            players1.add(player1);
+    private static List<Player> nextPlayers(List<Player> players0, Map<PlayerID, Bonus> playerBonuses,
+                                            Set<Cell> bombedCells1, Board board1, Set<Cell> blastedCells1,
+                                            Map<PlayerID, Optional<Direction>> speedChangeEvents) {
+
+        return players0.stream()
+                .map(p -> {
+                    Optional<Direction> speedChangeEvent = speedChangeEvents.get(p.id());
+                    Direction requestedDirection = speedChangeEvent != null ? speedChangeEvent.orElse(null) : null;
+                    return GameState.nextPlayer(p, playerBonuses.get(p.id()), bombedCells1, board1, blastedCells1, requestedDirection);
+                })
+                .collect(Collectors.toList());
+    }
+
+    private static Player nextPlayer(Player players0, Bonus playerBonus,
+                                     Set<Cell> bombedCells1, Board board1, Set<Cell> blastedCells1,
+                                     Direction requestedDirection) {
+
+        Sq<Player.DirectedPosition> directedPositions1 = GameState.nextPath(players0, requestedDirection);
+
+        // Advance of one SubCell on the player's path
+        directedPositions1 = directedPositions1.tail();
+
+        //Check possible collisions and update the Sequence if necessary (kinda ugly right now)
+        directedPositions1 = GameState.handleCollisions(players0, directedPositions1, board1, bombedCells1);
+
+        // Apply damages and generate a new LifeState Sequence
+        Sq<Player.LifeState> lifeStates1 = GameState.nextLifeState(players0, directedPositions1, blastedCells1);
+
+        // Create the new player given the new parameters
+        Player p1 = new Player(players0.id(), lifeStates1, directedPositions1, players0.maxBombs(), players0.bombRange());
+
+        // Update the capacities of the player given the possible bonus
+        if (playerBonus != null)
+            p1 = playerBonus.applyTo(p1);
+
+        return p1;
+    }
+
+    /**
+     * Generate the new Sequence of Directed Positions.
+     *
+     * @param player0
+     * @param requestedDirection
+     * @return
+     */
+    private static Sq<Player.DirectedPosition> nextPath(Player player0, Direction requestedDirection) {
+        if (!player0.lifeState().canMove())
+            return Player.DirectedPosition.stopped(player0.directedPositions().head());
+
+        if (requestedDirection == null)
+            requestedDirection = player0.direction();
+
+        if (player0.direction().isParallelTo(requestedDirection))
+            return Player.DirectedPosition.moving(new Player.DirectedPosition(player0.position(), requestedDirection));
+
+        if (player0.direction().isPerpendicularTo(requestedDirection)) {
+            Player.DirectedPosition nextCentralSubCell = GameState.projectedDirectedPosition(player0, player0.directedPositions());
+            Sq<Player.DirectedPosition> toNextCentralSubCell = player0.directedPositions().takeWhile(dp -> !dp.position().isCentral());
+            Player.DirectedPosition centralSubCellDirectedPosition = new Player.DirectedPosition(nextCentralSubCell.position(), requestedDirection);
+            Sq<Player.DirectedPosition> pastNextCentralSubCell = Player.DirectedPosition.moving(centralSubCellDirectedPosition);
+            return toNextCentralSubCell.concat(pastNextCentralSubCell);
         }
-        return players1;
+
+        return player0.directedPositions();
+    }
+
+    /**
+     * Check possible collisions and update the Sequence if necessary (kinda ugly right now)
+     *
+     * @param player0
+     * @param projectedPath
+     * @param board1
+     * @param bombedCells1
+     * @return
+     */
+    private static Sq<Player.DirectedPosition> handleCollisions(Player player0,
+                                                                Sq<Player.DirectedPosition> projectedPath,
+                                                                Board board1, Set<Cell> bombedCells1) {
+
+        Cell projectedCell = GameState.projectedDirectedPosition(player0, projectedPath).position().containingCell();
+        if (GameState.isColliding(player0, projectedCell, board1, bombedCells1))
+            return Sq.repeat(1, player0.directedPositions().head())
+                    .concat(projectedPath);
+
+        return projectedPath;
+    }
+
+    /**
+     * @param player0
+     * @param projectedPath
+     * @return
+     */
+
+    private static Player.DirectedPosition projectedDirectedPosition(Player player0, Sq<Player.DirectedPosition> projectedPath) {
+        if (!player0.lifeState().canMove())
+            return new Player.DirectedPosition(player0.position(), player0.direction());
+
+        return projectedPath.tail()
+                .findFirst(directedPos -> directedPos.position().isCentral());
+    }
+
+    /**
+     * @param player0
+     * @param projectedCell
+     * @param board1
+     * @param bombedCells1
+     * @return
+     */
+    private static boolean isColliding(Player player0, Cell projectedCell, Board board1, Set<Cell> bombedCells1) {
+        if (!board1.blockAt(projectedCell).canHostPlayer())
+            return true;
+
+        if (bombedCells1.contains(projectedCell) && projectedCell.equals(player0.position().containingCell()))
+            if (player0.position().distanceToCentral() <= Board.BOMB_BLOCKING_DISTANCE)
+                return true;
+
+        return false;
+    }
+
+    /**
+     * Apply damages and generate a new LifeState Sequence
+     *
+     * @param player0
+     * @param directedPositions1
+     * @param blastedCells1
+     * @return
+     */
+    private static Sq<Player.LifeState> nextLifeState(Player player0, Sq<Player.DirectedPosition> directedPositions1,
+                                                      Set<Cell> blastedCells1) {
+
+        Cell currentCell = directedPositions1.head().position().containingCell();
+
+        if (player0.isVulnerable() && blastedCells1.contains(currentCell))
+            return player0.statesForNextLife();
+        else
+            return player0.lifeStates().tail();
     }
 
     /**
diff --git a/src/ch/epfl/xblast/server/Player.java b/src/ch/epfl/xblast/server/Player.java
index d2f7b88..fdc4715 100644
--- a/src/ch/epfl/xblast/server/Player.java
+++ b/src/ch/epfl/xblast/server/Player.java
@@ -238,7 +238,7 @@ public final class Player {
 
         int newLives = lives() - 1;
 
-        if (newLives >= 0) {
+        if (newLives <= 0) {
             LifeState dead = new LifeState(newLives, LifeState.State.DEAD);
             nextLifeState = nextLifeState.concat(Sq.constant(dead));
         } else {
@@ -260,6 +260,13 @@ public final class Player {
     }
 
     /**
+     * @return the vulnerability state of the player
+     */
+    public boolean isVulnerable() {
+        return this.lifeState().state() == LifeState.State.VULNERABLE;
+    }