/*
 * 創建日期 2004-11-22
 *
 * TODO 要更改此生成的文件的模板，請轉至
 * 窗口 － 首選項 － Java － 代碼樣式 － 代碼模板
 */
package game;

import java.awt.event.*;
//import javax.swing.*;
import java.awt.*;
/**
 * @author Jerry703
 *
 * TODO 要更改此生成的類型注釋的模板，請轉至
 * 窗口 － 首選項 － Java － 代碼樣式 － 代碼模板
 */
public class GameListener implements ActionListener{
	public GroupButton mypanel;//保存自己的監聽對象的句柄
	//public MenuPanel menupanel;
	public boolean first = true;//是否為第一次按鈕
	SingleButton choise;//當前選擇按鈕的句柄
	SingleButton before;//上次選擇的按鈕的句柄
	int x;//上次選擇按鈕所在的坐標x值
	int y;//通上的y值
	public boolean hasway;//是否存在通路
	SingleButton smallx;//判斷前后2個按鈕的相對位置
	SingleButton bigx;//判斷前后2個按鈕的相對位置
	SingleButton smally;//判斷前后2個按鈕的相對位置
	SingleButton bigy;//判斷前后2個按鈕的相對位置
	
	public GameListener(GroupButton temp){
		this.mypanel = temp;
	}
	/* （非 Javadoc）
	 * @see java.awt.event.ActionListener#actionPerformed(java.awt.event.ActionEvent)
	 * 監聽器
	 */
	public void actionPerformed(ActionEvent e) {
		/*
		 * 如果監聽對象為SingleButton的事例時
		 * 如果是在該面版按下的第一個按鈕時調用getFirst
		 * 否則用doCheck方法檢查本次按鈕與上次按鈕是否類型相同
		 * 如果相同，則再進入路線查找函數findWay
		 * 如果路線查找成功，將這2個按鈕刪除
		 */
		if (e.getSource() instanceof SingleButton){
			if (first){
				getFirst(e);
			}
			else{
				if (doCheck(e)){
					if (findWay(e)){
						deleteSame(e);
					}
					else{
						before.setBackground(Color.GRAY);
						getFirst(e);
					}
				}
				else{
					clearIt();
					getFirst(e);
				}
			}
		}
		return;
	}
	
	public void getFirst(ActionEvent e){
		/*
		 * 函數功能：
		 * 保存本次點擊按鈕的坐標，并且設置背景顏色
		 */
		first = false;
		choise = (SingleButton)e.getSource();
		x = choise.x;
		y = choise.y;
		choise.setBackground(Color.GREEN);
		System.out.println("選擇了字母‘"+choise.type+"’，長度為"+choise.type);
	}
	public boolean doCheck(ActionEvent e){
		/*
		 * 檢查本次點擊與上次點擊是否：同一按鈕、同類按鈕、不同按鈕
		 * 返回boolean值
		 */
		before = choise;
		choise = (SingleButton)e.getSource();
		System.out.println("選擇了字母‘"+choise.type+"’，長度為"+choise.type);
		if (choise.x == x && choise.y == y){
			clearIt();
			System.out.println("選擇了同一個按鈕");
			return false;
		}
		if (before.type == choise.type){
			choise.setBackground(Color.green);
			System.out.println("選擇了字符相同的按鈕");
			return true;
		}
		else{
			before.setBackground(Color.GRAY);
			x = choise.x;
			y = choise.y;
			choise.setBackground(Color.GREEN);
			System.out.println("選擇不同的按鈕");
			return false;
		}	
	}
	public boolean findWay(ActionEvent e){
		/*
		 * 根據前后兩個按鈕的坐標，判斷2個按鈕位置的相對關系
		 * 并且得出x軸與y軸的絕對值，對x軸和y軸進行依次查找
		 * 找出主軸后調用副函數hasXfindY，hasYfindX，查找支線路線
		 * 成功得到路線返回真
		 * 否則返回假
		 */
		try{
			System.out.println("進入路線查詢");
			if (before.x<choise.x){
				smallx = before;
				bigx = choise;
			}
			else{
				smallx = choise;
				bigx = before;
			}
			if (before.y<choise.y){
				smally = before;
				bigy = choise;
			}
			else{
				smally = choise;
				bigy = before;
			}
			before.empty = true;
			choise.empty = true;
			int xstart;
			int xend;
			if (this.x < choise.x){
				xstart = this.x;
				xend = choise.x;
			}
			else{
				xstart = choise.x;
				xend = this.x;
			}
			int ystart;
			int yend;
			if (this.y < choise.y){
				ystart = this.y;
				yend = choise.y;
			}
			else{
				ystart = choise.y;
				yend = this.y;
			}
			//int xstart = x<choise.x?x:choise.x;
			//int xend = choise.x>x?choise.x:x;
			//int ystart = y<choise.y?y:choise.y;
			//int yend = choise.y>y?choise.y:y;
			if (!(Math.abs(choise.x - x) == 0)){
				System.out.println("X為主軸查找");
				int j;
				for (j=0;j<mypanel.MaxY;++j){
					hasway = true;
					for (int m=xstart;m<=xend;++m){
						if ( ! (mypanel.groupbutton[j][m] == null || mypanel.groupbutton[j][m].empty)){
							hasway = false;
							System.out.print(mypanel.groupbutton[j][m].empty + "  ");
							break;	
						}
						System.out.print(j+"時 "+m+"為空？："+mypanel.groupbutton[j][m].empty + "  ");
					}
					if (hasway && hasXfindY(j,smallx.y,xstart) && hasXfindY(j,bigx.y,xend)){
						return true;
					}
					else
						hasway = false;
				}
			}
			if (!(Math.abs(choise.y - y) == 0)){
				System.out.println("以Y主軸查找");
				int i;
				for (i=0;i<mypanel.MaxX;++i){
					hasway = true;
					for (int n=ystart;n<=yend;++n){
						if (!(mypanel.groupbutton[n][i] == null || mypanel.groupbutton[n][i].empty)){
							hasway = false;
							break;
						}
					}
					if (hasway && hasYfindX(i,smally.x,ystart) && hasYfindX(i,bigy.x,yend)){
						return true;
					}
					else
						hasway = false;
				}
			}
			return false;
		}catch(Exception error){
			error.printStackTrace();
			return false;
		}
		finally{
			before.empty = false;
			choise.empty = false;
		}
	}
	public boolean hasXfindY(int start,int end,int x){
		/*
		 * 找到x軸主線后，查找Y軸的2條支線
		 * 2條支線均成功返回真
		 * 否則返回假
		 */
		if (start == end){
			System.out.println("找到一條連線");
			return true;
		}
		if (start>end){
			int temp;
			temp = start;
			start = end;
			end = temp;
		}
		for (int i=start;i<=end;++i){
			if ( ! (mypanel.groupbutton[i][x] == null || mypanel.groupbutton[i][x].empty)){
				hasway = false;
				System.out.println("連線失敗");
				return false;
			}
		}
		System.out.println("找到一條連線");
		return true;
	}
	public boolean hasYfindX(int start,int end,int y){
		/*
		 * 找到y軸主線后，查找x軸的2條支線
		 * 2條支線均成功返回真
		 * 否則返回假
		 */
		if (start == end){
			System.out.println("可直接連線");
			return true;
		}
		if (start>end){
			int temp;
			temp = start;
			start = end;
			end = temp;
		}
		for (int i=start;i<=end;++i){
			if (! (mypanel.groupbutton[y][i] == null || mypanel.groupbutton[y][i].empty)){
				hasway = false;
				System.out.println("連線失敗");
				return false;
			}
		}
		System.out.println("找到一條連線");
		return true;
	}
	public void deleteSame(ActionEvent e){
		/*
		 * 將2個按鈕的empty屬性設為true
		 * 刪除這2個按鈕
		 * 調用狀態清空函數，清除所有屬性
		 */
		before.empty = true;
		choise.empty = true;
		mypanel.groupbutton[before.y][before.x].hide();
		//mypanel.remove(mypanel.groupbutton[before.y][before.x]);
		mypanel.repaint();
		mypanel.groupbutton[choise.y][choise.x].hide();
		//mypanel.remove(mypanel.groupbutton[choise.y][choise.x]);
		mypanel.repaint();
		mypanel.count -= 2;
		this.clearIt();
	}
	public void clearIt(){
		/*
		 * 清空狀態
		 */
		if (choise != null){
			choise.setBackground(Color.GRAY);
			choise = null;
		}
		if (before != null){
			before.setBackground(Color.GRAY);
			before = null;
		}
		this.x = -1;
		this.y = -1;
		this.before = null;
		this.choise = null;
		this.first = true;
	}
}