#pragma once

#include "map.h"

#define DIR_NONE	0
#define DIR_UP		1
#define DIR_DOWN   -1
#define DIR_RIGHT	2
#define DIR_LEFT   -2

class Mover
{
private:
	int new_x;
	int new_y;
	int old_x;
	int old_y;

	int new_dir;
	int old_dir;

	int speed;

	int width;
	int height;

	// 尝试按dir方向移动，并给出new_xy值
	bool TryMove(int dir,int& nx,int &ny, const Map* map)
	{
		/* 等待完善 */
		// 判断是否脱轨
		// 判断是否撞墙
		// 判断是否穿越边界
		return true;
	}

public:

	void SetDir(int dir) { new_dir = dir; }
	void SetXY(int x, int y) { new_x = x; new_y = y; }
	void SetOldXY(int x, int y) { old_x = x; old_y = y; }
	void SetSpeed(int s) { speed = s; }
	void SetWH(int w, int h) { width = w; height = h; }

	int GetX() const { return new_x; }
	int GetY() const { return new_y; }
	int GetOldX() const { return old_x; }
	int GetOldY() const { return old_y; }
	int GetW() const { return width; }
	int GetH() const { return height; }

	bool Move(const Map* map)
	{
		int nx, ny;
		bool s = TryMove(new_dir, nx, ny, map);

		// 如果新dir移动失败，将尝试使用旧dir移动
		if(s == false && old_dir != new_dir)
		{
			s = TryMove(old_dir, nx, ny, map);
		}

		// 两种移动策略中，有一种成功，则
		if (s)
		{
			old_x = new_x;
			old_y = new_y;
			old_dir = new_dir;
			new_x = nx;
			new_y = ny;
		}

		return s;
	}
	
	// 初始化
	void Init(int x,int y,int s,int w,int h)
	{
		old_x = x;
		old_y = y;

		new_x = x;
		new_y = y;

		speed = s;

		old_dir = DIR_NONE;
		new_dir = DIR_NONE;

		width = w;
		height = h;
	}
};