import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;
import java.lang.*;
import javax.swing.*;



public class Redaktor extends JApplet implements ActionListener,TextListener{
    String failinimi;
    int akendeArv=1;
    TextArea tekstivali1=new TextArea();
    TextArea tekstivali2=new TextArea();
    TextArea tekstivali3=new TextArea();
    TextArea tekstivali4=new TextArea();
    TextArea tekstivali5=new TextArea();
    TextArea tekstivali6=new TextArea();
    JButton   nupp2=new JButton("Uus");
    JButton   nupp=new JButton("Salvesta");
    JButton   nupp1=new JButton("Ava aknas");
    JButton   nupp3=new JButton("Sulge");
    TextField tf1=new TextField("");
    JTabbedPane paneel2=new JTabbedPane();  
    JPanel p1=new JPanel(new GridLayout(1,3));
    JSplitPane paneel=new JSplitPane(JSplitPane.VERTICAL_SPLIT,p1,paneel2);
    
    
    TextArea valjad[]=new TextArea[]{tekstivali1, tekstivali2,tekstivali3,tekstivali4,tekstivali5,tekstivali6};
    
      
    public Redaktor(){   //konstruktor
    	nupp.addActionListener(this);
    	nupp1.addActionListener(this);
    	nupp2.addActionListener(this);
    	nupp3.addActionListener(this);
    	tf1.addTextListener(this);
    	tekstivali1.addTextListener(this);
    	tekstivali2.addTextListener(this);
    	tekstivali3.addTextListener(this);
    	tekstivali4.addTextListener(this);
    	tekstivali5.addTextListener(this);
    	tekstivali6.addTextListener(this);
    	nupp.setEnabled(false);
    	nupp1.setEnabled(false);
    	p1.add(nupp2);
    	p1.add(nupp); //
    	p1.add(nupp3); //
    	p1.add(nupp1);//
    	p1.add(tf1);
    	getContentPane().add(paneel);
    }
   
   
   public void avaAken(String failinimi, int aken){
   	    if (failinimi.length()>0){
   	     paneel2.add(failinimi,valjad[aken]);  //
   	     } 
   	   }
   
  
  
  
  public void sulgeAken(int aken){
   	    paneel2.remove(aken);  
   	    tf1.setText("");   
   	   
   	   }
  
    	
    
  
  
  
  
  public void avaFail(String failinimi, String tegevus, int aken){
 		try{	
  	
  			if (tegevus=="loe"){
  	  			//System.out.println("avaFail-loe , aken "+aken+"  ");
  	  			BufferedReader sisse=new BufferedReader(new FileReader(failinimi));
   	    	 	paneel2.setTitleAt(aken,failinimi);
   	    	 		   
   	    	 	valjad[aken].setText("");   //TextArea tyhjendamine - 
   	    	 	String rida=sisse.readLine();
   				    while (rida!=null){
		    			valjad[aken].append(rida+"\n");  
		    		 	rida=sisse.readLine();
	   		 		}
         
			}
	 	
	 	
	 	
	 	
	 	
	 	} catch (Exception viga){System.out.println("Viga:"+viga);}
	 
	
	
	
		 try{
   
   			if (tegevus=="salvesta"){
   				//System.out.println("avaFail-salvesta aken " +aken);
   				PrintWriter valja=new PrintWriter(new FileWriter(failinimi));
   	 			paneel2.setTitleAt(aken,failinimi);
    			valja.println(valjad[aken].getText()); //
    			valja.close();
   	
   			}
    
  
  		 } catch (Exception viga){System.out.println("Viga:"+viga);}
    	  	
  }
   
  
 
 
 
 
 
 
  public void actionPerformed(ActionEvent e){
  	if ((e.getSource()==nupp2) && (tf1.getText().endsWith(".txt"))){   //uus aken
  		avaAken(tf1.getText(), (paneel2.getTabCount()));              // tyhja akna avamisel vaja teada olemasolevaid aknaid
  		//System.out.println("Akna indeks"+paneel2.getSelectedIndex());
		tf1.setText("");
		if (paneel2.getTabCount()==6){
			nupp2.setEnabled(false);
			}
		}
 	
 	 if (e.getSource()==nupp){
  		avaFail(tf1.getText(), "salvesta",paneel2.getSelectedIndex());
		}
  
  	 
  	 
  	
  	 if (e.getSource()==nupp1){
  		
  		     if (paneel2.getTabCount()==0){ //kas on yldse avatud aknaid ; siin oli getSelectedIndex
  	        	   	 avaAken(tf1.getText(), 0);   // tyhja akna avamisel (0 indeks) vaja teada olemasolevaid aknaid
  	    	     	}
  	  	 	avaFail(tf1.getText(), "loe",paneel2.getSelectedIndex());    
  	    
			}
		
	   
	   
	
	  if (e.getSource()==nupp3){      //sulgemine
  		
  		     if (paneel2.getTabCount()>0){ //kas on yldse avatud aknaid
  	            	sulgeAken(paneel2.getSelectedIndex());
  	         
  	         		}
  	   	
  	    
			}
  
  
   }
 




	public void textValueChanged(TextEvent m){
				
				if (m.getSource()==tf1){
						nupp1.setEnabled(true);
						if(paneel2.getTabCount()>0){
							nupp.setEnabled(true);
							}
    		
    					if(!tf1.getText().endsWith(".txt") || (tf1.getText().length() <4)){
							nupp.setEnabled(false);
							nupp1.setEnabled(false);
							}
	 
						}
 				
 				
 				if ((m.getSource()==tekstivali1) || (m.getSource()==tekstivali2) || (m.getSource()==tekstivali3)|| (m.getSource()==tekstivali4)|| (m.getSource()==tekstivali5)||(m.getSource()==tekstivali6)){
                        tf1.setText(paneel2.getTitleAt(paneel2.getSelectedIndex()));
 						nupp.setEnabled(true);
 						}
 				
 				}

 
   
   
   
   
   
   public static void main(String argumendid[]){
    	JFrame f=new JFrame("Redaktor"); 
    	f.getContentPane().add(new Redaktor());
       	f.setSize(500, 300);
    	f.setVisible(true);
  	}
}