import javax.microedition.midlet.*;
import javax.microedition.rms.*;
import javax.microedition.lcdui.*;
import java.io.*;
import java.util.*;
public class Salvestus3 extends MIDlet{
  String hoidlanimi="hoidla2";
  RecordStore rs;
  RecordEnumeration re;
  ValikuVorm valik=new ValikuVorm();
  public Salvestus3(){
    try{
     rs=RecordStore.openRecordStore(hoidlanimi, true);
     re=rs.enumerateRecords(null, null, true);
    }catch(Exception e){teade(e.getMessage());}
  }
  protected void startApp() throws MIDletStateChangeException{
    Display.getDisplay(this).setCurrent(valik);
  }
  protected void pauseApp(){}
  protected void destroyApp(boolean kohustus) throws MIDletStateChangeException{
    try{
      rs.closeRecordStore();
    } catch (Exception e){teade(e.getMessage());} 
  }
  
  
  void teade(String teade){
    Alert a=new Alert("Teade", teade, null, AlertType.CONFIRMATION);
    a.setTimeout(5);
    Display.getDisplay(this).setCurrent(a);
  }
  class ValikuVorm extends List implements CommandListener{
     LisamisVorm lisamine=new LisamisVorm(this);
     VaatamisVorm vaatamine=new VaatamisVorm(this);
     Command ava=new Command("Ava", Command.SCREEN, 1);
     Command valju=new Command("Välju", Command.EXIT, 1);
     ValikuVorm(){
       super("Tegevuse valik", List.IMPLICIT);
       append("Lisa", null);
       Image vaatamispilt=null;
       try{
         vaatamispilt=Image.createImage("/silmad.png");
       } catch(IOException e){
         teade("Probleem pildi laadimisel");
       }
       append("Vaata", vaatamispilt);
       setSelectCommand(ava);
       addCommand(valju);
       addCommand(ava);
       setCommandListener(this);
     }
     public void commandAction(Command c, Displayable d){
       if(c==valju){
          notifyDestroyed();
       }
       if(c==ava){
         if(getSelectedIndex()==0){
           Display.getDisplay(Salvestus3.this).setCurrent(lisamine);
         }
         if(getSelectedIndex()==1){
           Display.getDisplay(Salvestus3.this).setCurrent(vaatamine);
         }
       }
     }
  }
  class LisamisVorm extends Form implements CommandListener{
    TextField tfnimi=new TextField("Eesnimi", "", 20, TextField.ANY);
    DateField dfsynniaeg=new DateField("Sünnipäev", DateField.DATE);
    Command lisa=new Command("Lisa", Command.SCREEN, 1);
    Command yles=new Command("Üles", Command.EXIT, 1);
    Displayable avaja;
    LisamisVorm(Displayable avaja){
       super("Lisamine");
       this.avaja=avaja;
       append(tfnimi);
       append(dfsynniaeg);
       addCommand(lisa);
       addCommand(yles);
       setCommandListener(this);
    }
    public void commandAction(Command c, Displayable d){
      if(c==yles){
        Display.getDisplay(Salvestus3.this).setCurrent(avaja);
      }
      if(c==lisa){
        lisaKirje();
      }
    }

    void lisaKirje(){
      byte[] bm=leiaBaidiMassiiv();
      try{
       rs.addRecord(bm, 0, bm.length);
       dfsynniaeg.setDate(null);
       tfnimi.setString("");
      }catch(Exception e){
        teade(e.getMessage());
      }
    }
    
    byte[] leiaBaidiMassiiv(){
     ByteArrayOutputStream bos=new ByteArrayOutputStream();
     DataOutputStream dos=new DataOutputStream(bos);
     try{
      dos.writeUTF(tfnimi.getString());
      dos.writeLong(dfsynniaeg.getDate().getTime());
     }catch(Exception e){teade(e.getMessage());}
     return bos.toByteArray();
    }
  }

  class VaatamisVorm extends Form implements CommandListener{
    StringItem snimi=new StringItem("Nimi", "");
    DateField dfsynniaeg=new DateField("Sünnipäev", DateField.DATE);
    Command edasi=new Command("Edasi", Command.SCREEN, 1);
    Command tagasi=new Command("Tagasi", Command.SCREEN, 1);
    Command yles=new Command("Üles", Command.BACK, 1);
    Displayable avaja;
    VaatamisVorm(Displayable avaja){
       super("Vaatamine");
       this.avaja=avaja;
       append(snimi);
       append(dfsynniaeg);
       addCommand(edasi);
       addCommand(tagasi);
       addCommand(yles);
       setCommandListener(this);
    }
    public void commandAction(Command c, Displayable d){
     try{
      if(c==yles){
        Display.getDisplay(Salvestus3.this).setCurrent(avaja);
      }
      if(c==edasi){
       if(re.hasNextElement()){
        loeBaidiMassiivist(re.nextRecord());
       }
      }
      if(c==tagasi){
        if(re.hasPreviousElement()){
          loeBaidiMassiivist(re.previousRecord());
        }
      }
     }catch(Exception e){
       teade(e.getMessage());
     }
    }
    void loeBaidiMassiivist(byte[] b){
     try{
      DataInputStream dis=new DataInputStream(new ByteArrayInputStream(b));
      snimi.setText(dis.readUTF());
      dfsynniaeg.setDate(new Date(dis.readLong()));
     }catch(IOException e){
       teade(e.getMessage());
     }
    }
  }
}