package FrameTest;

import java.awt.Button;
import java.awt.Frame;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.StringTokenizer;
import java.util.Vector;

import javax.naming.spi.DirStateFactory.Result;
import javax.swing.JTextField;

import FrameTest.CalProject.MyCalculators;

public class Awtcalculation extends Frame implements ActionListener, KeyListener{
	private boolean FirstArithmetic;										// 첫번째에 사칙연산 삽입 금지
	private String lastText;
	private String	beforeChar = "";										// 사칙연산 연속 입력 방지 
	private String	showText = "";											// 계산식 저장
	private Vector<String> arrayAwtcalculation = new Vector<String>(50); 	// 사칙연산 저장하는 배열
	private float lastValue;												// = 후에 남은 값 저장
	private int 	maxSize =0;
	private float result = 0;

	StringTokenizer st;
	
	JTextField Calresult;
	
	public Awtcalculation() {
		super("계산기 1본");
		GridBagLayout gridbag = new GridBagLayout();
		GridBagConstraints constraint = new GridBagConstraints();
		
		constraint.fill = GridBagConstraints.BOTH;
		
		/** TextField Result */
		
		constraint.gridwidth = 4;
		constraint.gridwidth =
				GridBagConstraints.REMAINDER;
		
		Calresult = new JTextField("");
		Calresult.setHorizontalAlignment(JTextField.RIGHT);
		gridbag.setConstraints(Calresult, constraint);
		add(Calresult);

		/** Button */
		
		constraint.gridwidth = 2;
		
		Button backBtn = new Button("←");
		gridbag.setConstraints(backBtn, constraint);
		add(backBtn);
		backBtn.addActionListener(new ButtonListener());

		constraint.gridwidth =
				GridBagConstraints.REMAINDER;
		
		Button clearBtn = new Button("C");
		gridbag.setConstraints(clearBtn, constraint);
		add(clearBtn);
		clearBtn.addActionListener(new ButtonListener());
		
		constraint.weightx = 1.0;
		constraint.gridwidth = 1;
		
		Button numSevenBtn = new Button("7");
		gridbag.setConstraints(numSevenBtn, constraint);
		add(numSevenBtn);
		numSevenBtn.addActionListener(new ButtonListener());
		
		Button numEightBtn = new Button("8");
		gridbag.setConstraints(numEightBtn, constraint);
		add(numEightBtn);
		numEightBtn.addActionListener(new ButtonListener());
		
		Button numNineBtn = new Button("9");
		gridbag.setConstraints(numNineBtn, constraint);
		add(numNineBtn);
		numNineBtn.addActionListener(new ButtonListener());
		
		constraint.gridwidth =
				GridBagConstraints.REMAINDER;
		constraint.weightx = 1.0;
		
		Button numDeivideBtn = new Button("/");
		gridbag.setConstraints(numDeivideBtn, constraint);
		add(numDeivideBtn);
		numDeivideBtn.addActionListener(new ButtonListener());
		
		constraint.gridwidth = 1;
		
		Button numFourBtn = new Button("4");
		gridbag.setConstraints(numFourBtn, constraint);
		add(numFourBtn);
		numFourBtn.addActionListener(new ButtonListener());
		
		Button numFiveBtn = new Button("5");
		gridbag.setConstraints(numFiveBtn, constraint);
		add(numFiveBtn);
		numFiveBtn.addActionListener(new ButtonListener());
		
		Button numSixBtn = new Button("6");
		gridbag.setConstraints(numSixBtn, constraint);
		add(numSixBtn);
		numSixBtn.addActionListener(new ButtonListener());
		
		constraint.gridwidth = constraint.REMAINDER;
		
		Button numMultplyBtn = new Button("*");
		gridbag.setConstraints(numMultplyBtn, constraint);
		add(numMultplyBtn);
		numMultplyBtn.addActionListener(new ButtonListener());
		
		constraint.gridwidth = 1;
		
		Button numOneBtn = new Button("1");
		gridbag.setConstraints(numOneBtn, constraint);
		add(numOneBtn);
		numOneBtn.addActionListener(new ButtonListener());
		
		Button numTwoBtn = new Button("2");
		gridbag.setConstraints(numTwoBtn, constraint);
		add(numTwoBtn);
		numTwoBtn.addActionListener(new ButtonListener());

		Button numThreeBtn = new Button("3");
		gridbag.setConstraints(numThreeBtn, constraint);
		add(numThreeBtn);
		numThreeBtn.addActionListener(new ButtonListener());

		constraint.gridwidth = constraint.REMAINDER;
		
		Button numMinusBtn = new Button("-");
		gridbag.setConstraints(numMinusBtn, constraint);
		add(numMinusBtn);
		numMinusBtn.addActionListener(new ButtonListener());
		
		constraint.gridwidth = 1;
		
		Button numZeroBtn = new Button("0");
		gridbag.setConstraints(numZeroBtn, constraint);
		add(numZeroBtn);
		numZeroBtn.addActionListener(new ButtonListener());
		
		Button numConBtn = new Button(".");
		gridbag.setConstraints(numConBtn, constraint);
		add(numConBtn);
		numConBtn.addActionListener(new ButtonListener());
		
		Button numEqualsBtn = new Button("=");
		gridbag.setConstraints(numEqualsBtn, constraint);
		add(numEqualsBtn);
		numEqualsBtn.addActionListener(new ButtonListener());
		
		Button numPlusBtn = new Button("+");
		gridbag.setConstraints(numPlusBtn, constraint);
		add(numPlusBtn);
		numPlusBtn.addActionListener(new ButtonListener());
		
		/** 프레임 닫기 이벤트 */
		addWindowListener(
			new WindowAdapter(){
				public void windowClosing(WindowEvent e){
					System.exit(0);
				}
			}
		);
		
		/** Frame set */
		Calresult.addKeyListener(new MyCalculators());
		Calresult.requestFocus();
		setLayout(gridbag);
		setLocation(700, 200);
		pack();
		setVisible(true);
	}
	
	public class Action{
		public void Calculation(String str){
			System.out.println("str : " + str);
			if(str.contains("+") || str.contains("-") || str.contains("*") || str.contains("/")){
				st = new StringTokenizer(str , "+-*/" , true);		// true , +-*/ 포함해서 자르기

				arrayAwtcalculation.clear();	// 벡터 배열 초기화
				while(st.hasMoreTokens()){		
					arrayAwtcalculation.addElement(String.valueOf(st.nextToken()));	// 토큰을 벡터에 삽입
				}
				
				System.out.println(arrayAwtcalculation);
				result = 0;
				result += Float.parseFloat(arrayAwtcalculation.elementAt(0));
				System.out.println(result);
				for(int z = 1; z < arrayAwtcalculation.size(); z++){
					if(arrayAwtcalculation.elementAt(z).equals("+")){
						result += Float.parseFloat(arrayAwtcalculation.elementAt(z+1));
					} else if(arrayAwtcalculation.elementAt(z).equals("-")){
						result -= Float.parseFloat(arrayAwtcalculation.elementAt(z+1));
					} else if(arrayAwtcalculation.elementAt(z).equals("*")){
						result *= Float.parseFloat(arrayAwtcalculation.elementAt(z+1));
					} else if(arrayAwtcalculation.elementAt(z).equals("/")){
						result /= Float.parseFloat(arrayAwtcalculation.elementAt(z+1));
					}
				}
				Calresult.setText(String.valueOf(result));
			}else{
				;
			}
		}
	}
	
	private class ButtonListener extends Action implements ActionListener{
		
		public void actionPerformed(ActionEvent e){
			e.getActionCommand();
			// 시작이 사칙연산으로 시작되면 안됨.
			if(showText.isEmpty() || showText == "" || showText == null){
				FirstArithmetic = false;
			}else{
				FirstArithmetic = true;
			}
				
			/** 숫자 및 뒤로가기, 초기화 */
			if(e.getActionCommand() == "C"){
				beforeChar = "";
				showText= "";
				result	=0;
			} else if(e.getActionCommand() == "←" && showText.length() >= 1){
				showText = showText.substring(0,showText.length()-1);
			} else if(e.getActionCommand() == "0" || e.getActionCommand() == "1" || e.getActionCommand() == "2" || e.getActionCommand() == "3" || e.getActionCommand() == "4" || e.getActionCommand() == "5" || e.getActionCommand() == "6" || e.getActionCommand() == "7" || e.getActionCommand() == "8" || e.getActionCommand() == "9"){
				showText += beforeChar = e.getActionCommand();
			}
			
			/** 사칙연산 */
			System.out.println(beforeChar);
			if ((e.getActionCommand() == "+" ||  e.getActionCommand() == "-" || e.getActionCommand() == "*" || e.getActionCommand() == "/" || e.getActionCommand() == ".") && FirstArithmetic){
				if(!(beforeChar.equals("+") || beforeChar.equals("-") || beforeChar.equals("*") || beforeChar.equals("/") || beforeChar.equals("=") || beforeChar.equals("."))){		// 사칙연산 연속 두번 방지
					beforeChar = "";
					showText += beforeChar = e.getActionCommand();
				}
			}
			
			System.out.println("쌓이는 값 : " + showText);
			Calresult.setText(showText);
			
			if (e.getActionCommand() == "="){
				lastText = showText.substring(showText.length()-1);
				if(!e.getActionCommand().equals(beforeChar)){
					if(lastText.equals("+") || lastText.equals("-") || lastText.equals("*") || lastText.equals("/") || lastText.equals(".")){
						showText = showText.substring(0,showText.length()-1);
					}
					Calculation(showText);
				}
			}
		}
	}
	
	class MyCalculators extends Action implements KeyListener{
		@Override
		public void keyTyped(KeyEvent e){}
		@Override
	    public void keyPressed(KeyEvent e){
			if(showText.length() == 0 || showText == " "){
				FirstArithmetic = false;
			} else {
				FirstArithmetic = true;
			}
			
			System.out.println(e.getKeyCode());
	    	if(e.getKeyCode() == KeyEvent.VK_0 || e.getKeyCode() == KeyEvent.VK_NUMPAD0){
	    		showText+=0;
	    		beforeChar = "0";
	    	} else if(e.getKeyCode() == KeyEvent.VK_1 || e.getKeyCode() == KeyEvent.VK_NUMPAD1){
	    		showText+=1;
	    		beforeChar = "1";
	    	} else if(e.getKeyCode() == KeyEvent.VK_2 || e.getKeyCode() == KeyEvent.VK_NUMPAD2){
	    		showText+=2;
	    		beforeChar = "2";
	    	} else if(e.getKeyCode() == KeyEvent.VK_3 || e.getKeyCode() == KeyEvent.VK_NUMPAD3){
	    		showText+=3;
	    		beforeChar = "3";
	    	} else if(e.getKeyCode() == KeyEvent.VK_4 || e.getKeyCode() == KeyEvent.VK_NUMPAD4){
	    		showText+=4;
	    		beforeChar = "4";
	    	} else if(e.getKeyCode() == KeyEvent.VK_5 || e.getKeyCode() == KeyEvent.VK_NUMPAD5){
	    		showText+=5;
	    		beforeChar = "5";
	    	} else if(e.getKeyCode() == KeyEvent.VK_6 || e.getKeyCode() == KeyEvent.VK_NUMPAD6){
	    		showText+=6;
	    		beforeChar = "6";
	    	} else if(e.getKeyCode() == KeyEvent.VK_7 || e.getKeyCode() == KeyEvent.VK_NUMPAD7){
	    		showText+=7;
	    		beforeChar = "7";
	    	} else if(e.getKeyCode() == KeyEvent.VK_8 || e.getKeyCode() == KeyEvent.VK_NUMPAD8){
	    		showText+=8;
	    		beforeChar = "8";
	    	} else if(e.getKeyCode() == KeyEvent.VK_9 || e.getKeyCode() == KeyEvent.VK_NUMPAD9){
	    		showText+=9;
	    		beforeChar = "9";
	    	} else if(e.getKeyCode() == KeyEvent.VK_BACK_SPACE && showText.length() >= 1){
	    		showText = showText.substring(0,showText.length()-1);
	    	} else if(e.getKeyCode() == KeyEvent.VK_PLUS || e.getKeyCode() == KeyEvent.VK_PLUS + 46 || e.getKeyCode() == 107 && FirstArithmetic){
	    		System.out.println("beforeChar : "+ beforeChar + "boolean : " + !beforeChar.equals("+"));
					beforeChar = "";
					beforeChar = "+";
					showText+="+";
	    	} else if(e.getKeyCode() == KeyEvent.VK_MINUS || e.getKeyCode() == KeyEvent.VK_MINUS + 64 && FirstArithmetic){
	    		if(!beforeChar.equals("-")){		// 사칙연산 연속 두번 방지
	    			beforeChar = "";
	    			beforeChar = "-";
	    			showText+="-";
	    		}
	    	} else if(e.getKeyCode() == KeyEvent.VK_DIVIDE || e.getKeyCode() == KeyEvent.VK_DIVIDE + 64 && FirstArithmetic){
	    		if(!beforeChar.equals("/")){		// 사칙연산 연속 두번 방지
	    			beforeChar = "";
	    			beforeChar = "/";
	    			showText+="/";
	    		}
	    	} else if(e.getKeyCode() == KeyEvent.VK_MULTIPLY || e.getKeyCode() == KeyEvent.VK_MULTIPLY + 50 && FirstArithmetic){
	    		if(!beforeChar.equals("*")){		// 사칙연산 연속 두번 방지
	    			beforeChar = "";
	    			beforeChar = "*";
	    			showText+="*";
	    		}
	    	} else if(e.getKeyCode() == KeyEvent.VK_COLON || e.getKeyCode() == KeyEvent.VK_COLON + 48 && FirstArithmetic){
	    		if(!beforeChar.equals(".")){		// 사칙연산 연속 두번 방지
	    			beforeChar = "";
	    			beforeChar = ".";
	    			showText+=".";
	    		}
	    	} else if((e.getKeyCode() == KeyEvent.VK_EQUALS && !(e.getKeyCode() == KeyEvent.VK_PLUS)) || e.getKeyCode() == KeyEvent.VK_ENTER){
	    		if(!beforeChar.equals("=")){		// 사칙연산 연속 두번 방지
	    			lastText = showText.substring(showText.length()-1);
					if(lastText.equals("+") || lastText.equals("-") || lastText.equals("*") || lastText.equals("/") || lastText.equals(".")){
						showText = showText.substring(0,showText.length()-1);
					}
	    			Calculation(showText);
	    		}
	    	}
	    	System.out.println(showText);
	    }
		@Override
	    public void keyReleased(KeyEvent e){
	    }
	}
	
	public static void main(String args[]){
		new Awtcalculation();
	}
}