/*members*/
public:
	static const int size = 64;//Stone的默认大小
	int TYPE = NORMAL_STONE;//Stone的类型
	int HP = 0, DAMAGE = 0, MP = 0;
	QColor background;
	QPixmap foreground;
	QPen edge;//绘制边缘用
	bool isAnimating = false;//是否处于运动中
private:
	bool mouseHasEntered = false;//鼠标是否曾经进入过这个Stone
	QSize defaultSize = QSize(25, 25);

QSize Stone::sizeHint() const;
//sizeHint会决定Stone的默认大小
//要获取size，请使用Stone::size

bool Stone::isValid() const;
//判断一个Stone是否合法

bool Stone::match(const Stone * stone) const;
//判断两个Stone是否类型相同

virtual void setData();
//设置HP，DAMAGE，MP

virtual void setImage();
//设置background和foreground

protected:
	void paintEvent(QPaintEvent * event) override;
	//由构造器或者update()调用，请勿显性调用
	void mouseReleaseEvent(QMouseEvent * event) override;
	//当鼠标松开时触发
	//当该砖块处于isAnimating的状态中时，无法
	void enterEvent(QEvent *  event) override;
	//鼠标进入时触发：边缘发光
	void leaveEvent(QEvent * event) override;
	//鼠标离开时触发：取消边缘发光

signals:
	void clicked(Stone* me);
//由mouseReleaseEvent触发

public:
	const int boardSize = 8;
	QVector<QVector<Stone*>> board;
private:
	bool isAnimating = false;
	Stone* first;Stone* second;
	QPoint firstPos;QPoint secondPos;
	MoveData md;
	EvaluateState es;
	QVector<QPair<int, int>> pathOne, pathTwo;
	QVector<QPair<int, int>> stoneToCrush;
	ExchangeAnimation* exchangeAnimaion;
	CrushAnimation* crushAnimation;
	GravityAnimation* gravityAnimation;
	StoneManager stoneManager;

public:
	GameLogic(QWidget *parent = Q_NULLPTR);
	
	void setMoveData(int fx, int fy, int sx, int sy);
private:
	bool isTwoStonesConnected();
	//invoke if two stones have been chosen
	bool evaluate(EvaluateState state = Normal, QVector<QVector<bool>>& visited = QVector<QVector<bool>>(0));
	void initializeVisitedVector(QVector<QVector<bool>>& visited);
	bool isPositionValid(int position) const;
	bool isPositionValid(int col, int row) const;
	bool isMoveValid() const;
	void DFS(int x, int y, QVector<QVector<bool>>& visited, QVector<QPair<int, int>>& stones);
	void evaluatePath(QVector<QPair<int, int>>& path);
	//remove illegal elements in path
	void evaluateStonesToCrush(QVector<QPair<int, int>>& path);
	void animateCrushingStones();
	void waitForStopAnimation();
	void enableAllStones();

void stonesCrushing(int hp, int damage, int mp);

public slots:
	void fillBoard();
	void clickedStone(Stone* stone);//invoke by Stone::clicked()
	void deleteStone();
	void deleteStone(int col, int row);
	void changeStone(int row, int col, int type);
	void deleteRect();
	void deleteRect(int col, int row, int width, int height);
	void forceExchange();
	void forceExchange(int x1, int y1, int x2, int y2);
protected slots:
	void endMove();
	void gravity();
	void gravityFinished();
	//evaluate board, if there are stones to crush, go on gravity