internal StateController(IDataCollector sender, Labyrinth GameState, Player[] Players)
{
this.Phase = sender;
this.Current = GameState;
this.Players = Players;
this.Chest = new Vector2((int)GameState.Board.GetLength(1) / 2, (int)GameState.Board.GetLength(0) / 2);
}
/// <summary
/// Check whether rotating a target players block is a good counter.
/// </summary>
/// <param name="target"></param>
/// <param name="dir"></param>
/// <returns>Returns true </returns>
private bool AttemptRotate(Player target, Direction dir)
{
Current.Rotate((int)target.Position.X, (int)target.Position.Y, Rotate.Left);
if (!Current.PlayerCanMove(target, dir))
return true;
Current.Rotate((int)target.Position.X, (int)target.Position.Y, Rotate.Right, 2);
if (!Current.PlayerCanMove(target, dir))
return true;
Current.Rotate((int)target.Position.X, (int)target.Position.Y, Rotate.Left, 1, true);
return false;
}
/// <summary>
/// Moves a Player object on the board according to specific AI Rules.
/// If the player won the game a true value is returned.
/// </summary>
/// <returns>Returns true if the player calling the method has won.</returns>
internal bool ExecuteNextMove(Player sender, int Chance)
{
bool Answer = AnswerQuestion(Chance);
Phase.IncrementAnswer(Answer);
CalculateMove(sender, Answer);
if (sender.Position == Chest)
return true;
return false;
// Check for win state.
// Call next player.
}
/// <summary>
/// Creates a Labyrinth board with given dimensions.
/// </summary>
/// <param name="BoardSize">An integer defining the board dimensions. This number should be uneven! and greater than 4.</param>
/// <param name="StraightBlocks">An integer defining the amount of Straight type blocks on both the board and reserves combined.</param>
/// <param name="CornerBlocks">An integer defining the amount of Corner type blocks on both the board and reserves combined.</param>
/// <param name="TSplitBlocks">An integer defining the amount of T-Split type blocks on both the board and reserves combined.</param>
/// <param name="ReserveBlocks">An integer defining the amount of reserve blocks available. This value has a default of 5 and should be greater than 0.</param>
internal Labyrinth(IDataCollector sender, Player[] Players, int BoardSize, int StraightBlocks, int CornerBlocks, int TSplitBlocks, int ReserveBlocks)
{
this.Players = Players;
this.Phase = sender;
Board = new LabyrinthBlock[BoardSize, BoardSize];
Reserves = new LabyrinthBlock[ReserveBlocks];
int TotalBlocks = BoardSize * BoardSize + ReserveBlocks - 5; // 5 = Corners + chest
List<int> Blocks = new List<int>(){ StraightBlocks, CornerBlocks, TSplitBlocks };
// Start randomizer
RandomizeBoard(Blocks);
}
public static void Animate(Tuple<string,string,string> AnimationData, LabyrinthBlock[,] CurrentBoard, LabyrinthBlock[] CurrentReserves, Player[] CurrentPlayers, float scale, float offset)
{
if (IsAnimating)
return;
CurrentOperation = AnimationData;
GameBoard = CurrentBoard;
GameReserves = CurrentReserves;
GamePlayers = CurrentPlayers;
Scale = scale;
Offset = offset;
DataSetter set;
if(CurrentOperation == null) {
Game1.CurrentTurn++;
Game1.CurrentPlayerIndex++;
AnimationDone();
return;
}
switch (CurrentOperation.Item1) {
case "PawnMoved":
set = SetPlayerMovementData;
break;
case "HallShifted":
set = SetShiftingData;
break;
case "BlockRotated":
set = SetRotationData;
break;
default:
AnimationDone();
return;
}
set.Invoke();
IsAnimating = true;
}
/// <summary>
/// Executes a counter move without obstructing player movement.
/// </summary>
/// <param name="sender"></param>
/// <param name="dir">Direction in which the player is required to be able to move after the counter move.</param>
private bool ExecuteCounter(Player sender, Direction dir)
{
var EnemyData = new List<Tuple<Player, int>>();
for (int i = 0; i < Players.Length; i++)
if (Players[i] != sender)
EnemyData.Add(Tuple.Create(Players[i], GetTotalDistance(Players[i])));
EnemyData = EnemyData.OrderBy(x => x.Item2).ToList();
for (int i = 0; i < EnemyData.Count; i++) {
if (TryShiftRowCounter(sender, EnemyData[i].Item1, EnemyData, true, dir))
return true;
else if (TryRotateCounter(EnemyData[i].Item1))
return true;
}
return false;
}
/// <summary>
/// If possible moves a row and then the player in a direction.
/// </summary>
/// <returns>Returns true if player was able to move.</returns>
private bool TryShiftRowAndMove(Player sender, Direction dir)
{
if (dir == Direction.Left || dir == Direction.Right) {
if (Current.CanShift((int)sender.Position.Y) && Current.PlayerCanMove(sender, dir)) {
Current.ShiftRow((int)sender.Position.Y, dir);
sender.MovePlayer(dir);
return true;
}
}
else {
if (Current.CanShift((int)sender.Position.X) && Current.PlayerCanMove(sender, dir)) {
Current.ShiftRow((int)sender.Position.X, dir);
sender.MovePlayer(dir);
return true;
}
}
return false;
}
private bool TryShiftRowCounter(Player sender, Player target, List<Tuple<Player,int>> EnemyData, bool AvoidObstruction, Direction dir = Direction.Down)
{
int Distance = GetTotalDistance(target);
try {
if (Current.CanShift((int)target.Position.Y)) { // Can shift target along it's X axis.
if(GoodCounter(target, EnemyData, new Vector2(1,0))) { // Distance of target is increased. Good counter. (Shift Right)
if (!AvoidObstruction) {
Current.ShiftRow((int)target.Position.Y, Direction.Right);
return true;
}
if (sender.Position.X != target.Position.X && // If player is not moved.
(ExpectedPlayerLocation(sender, dir).Y != target.Position.Y || // If the row the player has to move to has not been moved.
Current.PlayerCanMoveOut(ExpectedPlayerLocation(sender, dir) + new Vector2(-1, 0), GetOpposite(dir)))) { // If the row has been moved but the player can move anyway.
Current.ShiftRow((int)target.Position.Y, Direction.Right);
return true;
}
}
else if (GoodCounter(target, EnemyData, new Vector2(-1, 0))) {
if (!AvoidObstruction) {
Current.ShiftRow((int)target.Position.Y, Direction.Left);
return true;
}
if (sender.Position.X != target.Position.X &&
(ExpectedPlayerLocation(sender, dir).Y != target.Position.Y ||
Current.PlayerCanMoveOut(ExpectedPlayerLocation(sender, dir) + new Vector2(1, 0), GetOpposite(dir)))) {
Current.ShiftRow((int)target.Position.Y, Direction.Left);
return true;
}
}
}
if (Current.CanShift((int)target.Position.X)) {
if (GoodCounter(target, EnemyData, new Vector2(0, 1))) {
if (!AvoidObstruction) {
Current.ShiftRow((int)target.Position.X, Direction.Down);
return true;
}
if (sender.Position.Y != target.Position.Y &&
(ExpectedPlayerLocation(sender, dir).X != target.Position.X ||
Current.PlayerCanMoveOut(ExpectedPlayerLocation(sender, dir) + new Vector2(0, -1), GetOpposite(dir)))) {
Current.ShiftRow((int)target.Position.X, Direction.Down);
return true;
}
}
else if (GoodCounter(target, EnemyData, new Vector2(0, -1))) {
if (!AvoidObstruction) {
Current.ShiftRow((int)target.Position.X, Direction.Up);
return true;
}
if (sender.Position.Y != target.Position.Y &&
(ExpectedPlayerLocation(sender, dir).X != target.Position.X ||
Current.PlayerCanMoveOut(ExpectedPlayerLocation(sender, dir) + new Vector2(0, 1), GetOpposite(dir)))) {
Current.ShiftRow((int)target.Position.X, Direction.Up);
return true;
}
}
}
return false;
}
catch {
return false;
}
}
private Vector2 ExpectedPlayerLocation(Player sender, Direction dir)
{
switch (dir) {
case Direction.Left:
return new Vector2(sender.Position.X - 1, sender.Position.Y);
case Direction.Right:
return new Vector2(sender.Position.X + 1, sender.Position.Y);
case Direction.Up:
return new Vector2(sender.Position.X, sender.Position.Y - 1);
default:
return new Vector2(sender.Position.X, sender.Position.Y + 1);
}
}
private bool TryRotateSelf(Player sender, Direction dir)
{
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y, Rotate.Left);
if (Current.PlayerCanMove(sender, dir))
return true;
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y, Rotate.Right, 2);
if (Current.PlayerCanMove(sender, dir))
return true;
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y, Rotate.Left, 1, true);
return false;
}
/// <summary>
/// Executes a counter move disregarding player movement after the counter.
/// Should be used when the player can't move and will only counter others.
/// </summary>
private bool ExecuteCounter(Player sender)
{
var EnemyData = new List<Tuple<Player, int>>(); // List containing all enemies with their respective distance to chest.
for (int i = 0; i < Players.Length; i++)
if (Players[i] != sender)
EnemyData.Add(Tuple.Create(Players[i], GetTotalDistance(Players[i])));
EnemyData = EnemyData.OrderBy(x => x.Item2).ToList(); // Sort array to get the closest player to the chest at the lowest index.
for (int i = 0; i < EnemyData.Count; i++) {
if (TryShiftRowCounter(sender, EnemyData[i].Item1, EnemyData, false))
return true;
else if (TryRotateCounter(EnemyData[i].Item1))
return true;
}
return false;
}
internal bool PlayerCanMoveOut(Player player, Direction dir)
{
if (Board[(int)player.Position.Y, (int)player.Position.X].CanMove(dir))
return true;
return false;
}
private bool OnlyMovePlayer(Player sender, Vector2 Distance)
{
if (Distance.X == 0) {
if (Distance.Y > 0) {
if (Current.PlayerCanMove(sender, Direction.Down)) {
sender.MovePlayer(Direction.Down);
return true;
}
}
else {
if (Current.PlayerCanMove(sender, Direction.Up)) {
sender.MovePlayer(Direction.Up);
return true;
}
}
return false;
}
else if (Distance.Y == 0) {
if (Distance.X > 0) {
if (Current.PlayerCanMove(sender, Direction.Right)) {
sender.MovePlayer(Direction.Right);
return true;
}
}
else {
if (Current.PlayerCanMove(sender, Direction.Left)) {
sender.MovePlayer(Direction.Left);
return true;
}
}
return false;
}
if (Distance.X > 0) {
if (Current.PlayerCanMove(sender, Direction.Right)) {
sender.MovePlayer(Direction.Right);
return true;
}
}
else if (Distance.X < 0) {
if (Current.PlayerCanMove(sender, Direction.Left)) {
sender.MovePlayer(Direction.Left);
return true;
}
}
if (Distance.Y > 0) {
if (Current.PlayerCanMove(sender, Direction.Down)) {
sender.MovePlayer(Direction.Down);
return true;
}
}
else if (Distance.Y < 0) {
if (Current.PlayerCanMove(sender, Direction.Up)) {
sender.MovePlayer(Direction.Up);
return true;
}
}
return false;
}
/// <summary>
/// Executes a counter move to block a target player.
/// </summary>
/// <returns>Returns true if a counter move was found and executed.</returns>
private bool ExecuteCounter(Player sender, Player target)
{
var EnemyData = new List<Tuple<Player, int>>();
for (int i = 0; i < Players.Length; i++)
if (Players[i] != sender)
EnemyData.Add(Tuple.Create(Players[i], GetTotalDistance(Players[i])));
EnemyData = EnemyData.OrderBy(x => x.Item2).ToList();
if (TryShiftRowCounter(sender, target, EnemyData, false))
return true;
else if (TryRotateCounter(target))
return true;
return false;
}
/// <summary>
/// Execute when players X or Y location is alligned with the Chest.
/// </summary>
private void HandleZeroDistance(Player sender, Vector2 Distance, Direction dir)
{
if (Current.PlayerCanMove(sender, dir)) { // Player can move, try to block another player.
ExecuteCounter(sender, dir); // Execute counter move.
sender.MovePlayer(dir); // Move self in direction.
return;
}
// Try rotating self to see if you can move after.
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y, Rotate.Right);
if (Current.PlayerCanMove(sender, dir)) {
sender.MovePlayer(dir);
return;
}
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y, Rotate.Left, 2);
if (Current.PlayerCanMove(sender, dir)) {
sender.MovePlayer(dir);
return;
}
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y, Rotate.Right, 1, true); // Rotating self not usefull, reset rotation.
// Move not possible. Rotate adjacent and check again.
RotateAdjacent(sender, Distance);
// If player can move after rotating , move player.
if (Current.PlayerCanMove(sender, dir))
sender.MovePlayer(dir);
}
private bool LastMove(Player sender, Direction dir)
{
if (Current.PlayerCanMove(sender, dir)) {
sender.MovePlayer(dir);
return true;
}
else if (TryRotateSelf(sender, dir)) {
sender.MovePlayer(dir);
return true;
}
else {
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y, Rotate.Right);
return true;
}
}
private bool HandleSameBlock(Player sender, Vector2 Distance)
{
if (OnlyMovePlayer(sender, Distance))
return true;
if (Distance.X > 0) {
if (TryRotateSelf(sender, Direction.Right) || TryRotate(sender, Direction.Right)) {
sender.MovePlayer(Direction.Right);
return true;
}
}
else if (Distance.X < 0) {
if (TryRotateSelf(sender, Direction.Left) || TryRotate(sender, Direction.Left)) {
sender.MovePlayer(Direction.Left);
return true;
}
}
if (Distance.Y > 0) {
if (TryRotateSelf(sender, Direction.Down) || TryRotate(sender, Direction.Down)) {
sender.MovePlayer(Direction.Down);
return true;
}
}
else if (Distance.Y < 0) {
if (TryRotateSelf(sender, Direction.Up) || TryRotate(sender, Direction.Up)) {
sender.MovePlayer(Direction.Up);
return true;
}
}
return false;
}
/// <summary>
/// Execute when player is within a 1 block radius of chest.
/// </summary>
private void HandleLastMove(Player sender, Vector2 Distance)
{
// State where player is in proximity of chest
if (Distance.X == 0) {
if (Distance.Y > 0)
LastMove(sender, Direction.Down);
else
LastMove(sender, Direction.Up);
return;
}
else if (Distance.Y == 0) {
if (Distance.X > 0)
LastMove(sender, Direction.Right);
else
LastMove(sender, Direction.Left);
return;
}
if (Distance.X == 1 && Distance.Y == 1) { // Player is Left and above of chest.
if (Current.PlayerCanMoveOut(sender, Direction.Right)) {
Current.ShiftRow((int)sender.Position.X, Direction.Down);
sender.MovePlayer(Direction.Right);
}
else if (Current.PlayerCanMoveOut(sender, Direction.Down)) {
Current.ShiftRow((int)sender.Position.Y, Direction.Right);
sender.MovePlayer(Direction.Down);
}
else
Current.ShiftRow((int)sender.Position.X, Direction.Down);
}
else if (Distance.X == -1 && Distance.Y == 1) { // Player is right and above chest.
if (Current.PlayerCanMoveOut(sender, Direction.Left)) {
Current.ShiftRow((int)sender.Position.X, Direction.Down);
sender.MovePlayer(Direction.Left);
}
else if (Current.PlayerCanMoveOut(sender, Direction.Down)) {
Current.ShiftRow((int)sender.Position.Y, Direction.Left);
sender.MovePlayer(Direction.Down);
}
else
Current.ShiftRow((int)sender.Position.X, Direction.Down);
}
else if (Distance.X == 1 && Distance.Y == -1) { // Player is left and below the chest.
if (Current.PlayerCanMoveOut(sender, Direction.Right)) {
Current.ShiftRow((int)sender.Position.X, Direction.Up);
sender.MovePlayer(Direction.Right);
}
else if (Current.PlayerCanMoveOut(sender, Direction.Up)) {
Current.ShiftRow((int)sender.Position.Y, Direction.Right);
sender.MovePlayer(Direction.Up);
}
else
Current.ShiftRow((int)sender.Position.X, Direction.Up);
}
else if (Distance.X == -1 && Distance.Y == -1) { // Player is right and below the chest.
if (Current.PlayerCanMoveOut(sender, Direction.Left)) {
Current.ShiftRow((int)sender.Position.X, Direction.Up);
sender.MovePlayer(Direction.Left);
}
else if (Current.PlayerCanMoveOut(sender, Direction.Up)) {
Current.ShiftRow((int)sender.Position.Y, Direction.Left);
sender.MovePlayer(Direction.Up);
}
else
Current.ShiftRow((int)sender.Position.X, Direction.Up);
}
}
private bool GoodCounter(Player target, List<Tuple<Player, int>> EnemyData, Vector2 Movement)
{
bool GoodMove = true;
for (int i = 0; i < EnemyData.Count; i++)
if (EnemyData[i].Item1 == target) {
if (GetTotalDistance(EnemyData[i].Item1.Position + Movement) > EnemyData[i].Item2)
GoodMove = true;
else
return false;
}
else if (GetTotalDistance(EnemyData[i].Item1.Position + Movement) < EnemyData[i].Item2)
return false;
return GoodMove;
}
private void CalculateMove(Player sender, bool Correct)
{
var Distance = new Vector2(Chest.X - sender.Position.X, Chest.Y - sender.Position.Y);
if (!Correct) { // Incorrect answer. Only rotate an adjacent block.
RotateAdjacent(sender, Distance);
return;
}
for (int i = 0; i < Players.Length; i++) {
if (Players[i] != sender && GetTotalDistance(Players[i]) <= 2) { // Player is in proximity of chest.
if (Players[i].Position != sender.Position && ExecuteCounter(sender, Players[i])) {
OnlyMovePlayer(sender, Distance);
return;
}
}
else if (Players[i] != sender && Players[i].Position == sender.Position) { // Player shares a block with another player.
if (HandleSameBlock(sender, Distance))
return;
else
ExecuteBestMove(sender, Distance);
}
}
ExecuteBestMove(sender, Distance);
}
/// <summary>
/// Rotates and Adjacent block to the player.
/// </summary>
private bool RotateAdjacent(Player sender, Vector2 Distance, bool SecondBest = false)
{
if (Distance.X == 0) { // X-axis is alligned.
if (Distance.Y > 0) { // Needs to move down.
if (TryRotate(sender, Direction.Down))
return true;
else if (!Current.PlayerCanMoveOut(sender.Position + new Vector2(0, 1), Direction.Up))
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y + 1, Rotate.Right);
}
else { // Needs to move up.
if (TryRotate(sender, Direction.Up))
return true;
else if(!Current.PlayerCanMoveOut(sender.Position + new Vector2(0, -1), Direction.Down))
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y - 1, Rotate.Right);
}
return false; // Rotated adjacent but still can't move.
}
else if (Distance.Y == 0) { // Y-axis is alligned.
if (Distance.X > 0) { // Needs to move right.
if (TryRotate(sender, Direction.Right))
return true;
else if (!Current.PlayerCanMoveOut(sender.Position + new Vector2(1, 0), Direction.Left))
Current.Rotate((int)sender.Position.X + 1, (int)sender.Position.Y, Rotate.Right);
}
else { // Needs to move left.
if (TryRotate(sender, Direction.Left))
return true;
else if (!Current.PlayerCanMoveOut(sender.Position + new Vector2(-1, 0), Direction.Right))
Current.Rotate((int)sender.Position.X - 1, (int)sender.Position.Y, Rotate.Right);
}
return false; // rotated adjacent but still can't move.
}
if (Distance.X > 0) { // Rotate right adjacent.
if (TryRotate(sender, Direction.Right))
return true;
if (SecondBest && !Current.PlayerCanMoveOut(sender.Position + new Vector2(1,0), Direction.Left)) {
Current.Rotate((int)sender.Position.X + 1, (int)sender.Position.Y, Rotate.Right);
return true;
}
}
else if (Distance.X < 0) { // Rotate left adjacent.
if (TryRotate(sender, Direction.Left))
return true;
if (SecondBest && !Current.PlayerCanMoveOut(sender.Position + new Vector2(-1, 0), Direction.Right)) {
Current.Rotate((int)sender.Position.X - 1, (int)sender.Position.Y, Rotate.Right);
return true;
}
}
if (Distance.Y > 0) { // Rotate down adjacent.
if (TryRotate(sender, Direction.Down))
return true;
if (SecondBest && !Current.PlayerCanMoveOut(sender.Position + new Vector2(0, 1), Direction.Up)) {
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y + 1, Rotate.Right);
return true;
}
}
else if (Distance.Y < 0) { // Rotate up adjacent.
if (TryRotate(sender, Direction.Up))
return true;
if (SecondBest && !Current.PlayerCanMoveOut(sender.Position + new Vector2(0, -1), Direction.Down)) {
Current.Rotate((int)sender.Position.X, (int)sender.Position.Y - 1, Rotate.Right);
return true;
}
}
// No adjacent rotation improves the player's position. Recursive call to rotate an adjacent block anyway.
if (SecondBest)
return false;
return RotateAdjacent(sender, Distance, true);
}
private Player[] GetPlayers()
{
var toReturn = new Player[PlayerHistory.Length];
for(int i = 0; i < toReturn.Length; i++) {
Vector2 Position;
switch (i) {
case 0:
Position = Vector2.Zero;
break;
case 1:
Position = new Vector2(CurrentBoard.GetLength(0) - 1, 0);
break;
case 2:
Position = new Vector2(CurrentBoard.GetLength(0) - 1);
break;
case 3:
Position = new Vector2(0, CurrentBoard.GetLength(0) - 1);
break;
default: throw new IndexOutOfRangeException("Not more than 4 players can exist.");
}
toReturn[i] = new Player(ConvertColor(PlayerHistory[i]), Position);
}
return toReturn;
}
/// <summary>
/// Checks whether or not rotating an adjacent block is beneficial to the player.
/// </summary>
/// <returns>Returns true when the move is beneficial.</returns>
private bool TryRotate(Player sender, Direction dir)
{
int OffsetX = 0;
int OffsetY = 0;
if (dir == Direction.Right)
OffsetX = 1;
else if (dir == Direction.Left)
OffsetX = -1;
else if (dir == Direction.Up)
OffsetY = -1;
else
OffsetY = 1;
Current.Rotate((int)sender.Position.X + OffsetX, (int)sender.Position.Y + OffsetY, Rotate.Right);
if (Current.PlayerCanMove(sender, dir))
return true;
Current.Rotate((int)sender.Position.X + OffsetX, (int)sender.Position.Y + OffsetY, Rotate.Left, 2);
if (Current.PlayerCanMove(sender, dir))
return true;
Current.Rotate((int)sender.Position.X + OffsetX, (int)sender.Position.Y + OffsetY, Rotate.Right, 1, true);
return false;
}
internal bool PlayerCanMove(Player player, Direction dir)
{
return PlayerCanMove(player.Position, dir);
}
private bool TryRotateCounter(Player target)
{
Vector2 Distance = new Vector2(Chest.X - target.Position.X, Chest.Y - target.Position.Y);
if(Distance.X == 0) {
if (Distance.Y > 0) {
if (!Current.PlayerCanMove(target, Direction.Down)) // Player can't move in the first place.
return false;
if (AttemptRotate(target, Direction.Down))
return true;
}
else {
if (!Current.PlayerCanMove(target, Direction.Up))
return false;
if (AttemptRotate(target, Direction.Up))
return true;
}
}
else if(Distance.Y == 0) {
if(Distance.X > 0) {
if (!Current.PlayerCanMove(target, Direction.Right))
return false;
if (AttemptRotate(target, Direction.Right))
return true;
}
else {
if (!Current.PlayerCanMove(target, Direction.Left))
return false;
if (AttemptRotate(target, Direction.Left))
return true;
}
}
return false;
}
private void ExecuteBestMove(Player sender, Vector2 Distance, bool SecondBest = false)
{
// Handle player being inline with the Chest.
#region New Method : HandleZeroDistance // <<<<<
if (SecondBest)
if (HandleSameBlock(sender, Distance))
return;
if (Distance.X == 0) {
if (Distance.Y > 0) // Player has to move Down.
HandleZeroDistance(sender, Distance, Direction.Down);
else // Player has to move Up.
HandleZeroDistance(sender, Distance, Direction.Up);
return;
}
else if (Distance.Y == 0) {
if (Distance.X > 0) // Player has to move Right.
HandleZeroDistance(sender, Distance, Direction.Right);
else // Player has to move Left.
HandleZeroDistance(sender, Distance, Direction.Left);
return;
}
if (Distance.X == 1 && Distance.Y == 1) {
HandleLastMove(sender, Distance);
return;
}
#endregion
if (Distance.X > 0) {
if (Distance.X != 1) {
if (TryShiftRowAndMove(sender, Direction.Right))
return;
if (SecondBest) {
if (Current.PlayerCanMove(sender, Direction.Right)) {
ExecuteCounter(sender, Direction.Right);
sender.MovePlayer(Direction.Right);
return;
}
else if (Current.CanShift((int)sender.Position.Y)) { // If second best, only move a row. Player can't move.
Current.ShiftRow((int)sender.Position.Y, Direction.Right);
return;
}
}
}
}
else if (Distance.X < 0) {
if (Distance.X != -1) {
if (TryShiftRowAndMove(sender, Direction.Left))
return;
if (SecondBest) {
if (Current.PlayerCanMove(sender, Direction.Left)) {
ExecuteCounter(sender, Direction.Left);
sender.MovePlayer(Direction.Left);
return;
}
else if (Current.CanShift((int)sender.Position.Y)) {
Current.ShiftRow((int)sender.Position.Y, Direction.Left);
return;
}
}
}
}
if (Distance.Y > 0) {
if (Distance.Y != 1) {
if (TryShiftRowAndMove(sender, Direction.Down))
return;
if (SecondBest)
if (Current.PlayerCanMove(sender, Direction.Down)) {
ExecuteCounter(sender, Direction.Down);
sender.MovePlayer(Direction.Down);
return;
}
else if (Current.CanShift((int)sender.Position.X)) {
Current.ShiftRow((int)sender.Position.X, Direction.Down);
return;
}
}
}
else if (Distance.Y < 0) {
if (Distance.Y != 1) {
if (TryShiftRowAndMove(sender, Direction.Up))
return;
if (SecondBest)
if (Current.PlayerCanMove(sender, Direction.Up)) {
ExecuteCounter(sender, Direction.Up);
sender.MovePlayer(Direction.Up);
return;
}
else if (Current.CanShift((int)sender.Position.X)) {
Current.ShiftRow((int)sender.Position.X, Direction.Up);
return;
}
}
}
if (SecondBest) {
// Worst possible move. Only obstruct other player.
if (!RotateAdjacent(sender, Distance))
ExecuteCounter(sender);
return;
// Later implementation ? :
// Annoy other player if you can move.
// else rotate nearby and move.
// else only rotate.
}
ExecuteBestMove(sender, Distance, true);
}
private int GetTotalDistance(Player target)
{
return (int)(Math.Abs(Chest.X - target.Position.X) + Math.Abs(Chest.Y - target.Position.Y));
}