package cn.edu.usc.snake.entities;

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;

import cn.edu.usc.snake.util.ConstValue;

public class Ground {

	private int[][] rocks = new int[ConstValue.PANEL_WIDTH][ConstValue.PANEL_HEIGHT];
	
	public Ground() {
		for(int x = 0; x < ConstValue.PANEL_WIDTH; x ++) {
			rocks[x][0] = 1;
			rocks[x][ConstValue.PANEL_HEIGHT - 1] = 1;
		}
	}
	
	/**
	 * 檢查點p是否為石頭
	 * @param p
	 * @return
	 */
	public boolean isRock(Point p) {
		for(int x = 0; x < ConstValue.PANEL_WIDTH; x ++) {
			for(int y = 0; y <ConstValue.PANEL_HEIGHT; y ++) {
				if(1 == rocks[x][y] && 
						(x == p.x && y == p.y)) {
					return true;
				}
			}
		}
		return false;
	}
	
	/**
	 * 檢查蛇是否碰到石頭
	 * @param snake
	 * @return
	 */
	public boolean isSnakeEatRock(Snake snake) {
		for(int x = 0; x < ConstValue.PANEL_WIDTH; x ++) {
			for(int y = 0; y < ConstValue.PANEL_HEIGHT; y ++) {
				if(1 == rocks[x][y] &&
						(x == snake.getHead().x && y == snake.getHead().y)) {
					return true;
				}
			}
		}
		return false;
	}
	
	/**
	 * 顯示石頭
	 * @param g
	 */
	public void drawMe(Graphics g) {
		Color c = g.getColor();
		g.setColor(Color.WHITE);
		for(int x = 0; x < ConstValue.PANEL_WIDTH; x ++) {
			for(int y = 0; y < ConstValue.PANEL_HEIGHT; y ++) {
				if(1 == rocks[x][y]) {
					g.fill3DRect(x * ConstValue.CELL_WIDTH,
							y * ConstValue.CELL_HEIGHT,
							ConstValue.CELL_WIDTH,
							ConstValue.CELL_HEIGHT,
							true);
				}
			}
		}
		g.setColor(c);
	}
}