import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

import java.lang.System;
import java.util.Timer;
import java.util.TimerTask;

public class MeetingTimerMID
    extends MIDlet 
    implements CommandListener 
  {
  // Forms & fields
  private Form mMainForm;        // Main form for the screen
  private Form mSettingsForm;    // Enter salary & attendee values
  private Form mHelpForm;        // Help screen
  private TextField mSalary;     // Avg salary field in mSettingsForm
  private TextField mAttendees;   // Num of atendees field in mSettingsForm
  private Command mStartCmd;      // "Start Timer" command 
  private Command mStopCmd;       // "Stop Timer" command
  private StringItem mUpdateItem; // The item in the main form to display
  
  // MeetingTimer object to calculate the cost of the meeting
  private MyMeetingTimer mMeetingTimer = null;
  
  public MeetingTimerMID() 
  {
    // Default settings - 5 employees at $50K
    long salary = 50000;
    long attendees = 5;
  
    // Create a main form and add a welcome string
    mMainForm = new Form("Meeting Timer");
    mMainForm.append(new StringItem(null, 
      "Total cost of this meeting:\n"));
    
    // Create a string item to be overwritten by the display refresh
    mUpdateItem = new StringItem(null, "-Timer Off-");
    mMainForm.append(mUpdateItem);

    // Add commands and command listener
    mMainForm.addCommand(new Command("Exit", Command.EXIT, 0));
    
    mStartCmd = new Command("Start Timer", Command.SCREEN, 1);   // Toggle Start/Stop menu
    mStopCmd = new Command("Stop Timer", Command.SCREEN, 1);
    mMainForm.addCommand(mStartCmd);
    
    mMainForm.addCommand(new Command("Settings", Command.SCREEN, 2));
    mMainForm.addCommand(new Command("Reset", Command.SCREEN, 3));
    mMainForm.addCommand(new Command("Help", Command.SCREEN, 4));
    mMainForm.setCommandListener(this);
    
    // Now, create a form to enter the data for the meeting
    mSettingsForm = new Form("Enter Settings");
    mAttendees = new TextField("People attending:", 
      String.valueOf(attendees),
      5, TextField.NUMERIC);
    mSalary = new TextField("(Estimated) Avg Salary ($/yr):", 
      String.valueOf(salary),
      6, TextField.NUMERIC);
    mSettingsForm.append(mAttendees);
    mSettingsForm.append(mSalary);
    mSettingsForm.addCommand(new Command("Back", Command.BACK, 0));
    mSettingsForm.addCommand(new Command("Help", Command.SCREEN, 1));
    mSettingsForm.setCommandListener(this);
    
    // Finally, create the help screen
    mHelpForm = new Form("Help");
    mHelpForm.append(new StringItem(null, 
      "- Use the \"SETTINGS\" screen to enter the number of people attending your meeting and their average salary.\n"));
    mHelpForm.append(new StringItem(null, 
      "- Use the \"START TIMER\" or \"STOP TIMER\" buttons to count down the meeting cost.\n"));
    mHelpForm.append(new StringItem(null, 
      "- Use \"RESET\" to zero out the meeting cost.\n"));
    mHelpForm.append(new StringItem(null, 
      "- Visit www.theHaws.org for more stuff!\n"));
    mHelpForm.addCommand(new Command("Back", Command.BACK, 0));
    mHelpForm.setCommandListener(this);
    
    // Set up and start the timer to refresh the display.
    mMeetingTimer = new MyMeetingTimer();
    
    // Modify Meeting Timer values to match fields on Settings form
    mMeetingTimer.setSalary(salary);
    mMeetingTimer.setAttendees(attendees);
  }
  
  public void startApp() {
    Display.getDisplay(this).setCurrent(mMainForm);
  }

  
  public void pauseApp() {}
  
  public void destroyApp(boolean unconditional) {}
  
  public void commandAction(Command c, Displayable s) {
    if (c.getLabel().equals("Exit") )
      {
      notifyDestroyed();
      }
    else if (c.getLabel().equals("Settings") )
      {
      // Go to Settings form from Main form
      Display.getDisplay(this).setCurrent(mSettingsForm);
      }
    else if (c.getLabel().equals("Back") )
      {
      // Modify Meeting Timer values to match fields on Settings form
      mMeetingTimer.setSalary((long)Integer.parseInt(mSalary.getString()));
      mMeetingTimer.setAttendees((long)Integer.parseInt(mAttendees.getString()));
      
      // Go to Main form, returning from Settings form
      Display.getDisplay(this).setCurrent(mMainForm);
      }
    else if (c.getLabel().equals("Start Timer") )
      {
      mMeetingTimer.startTimer();
      
      mMainForm.removeCommand(mStartCmd);
      mMainForm.addCommand(mStopCmd);
      }
    else if (c.getLabel().equals("Stop Timer") )
      {
      mMeetingTimer.stopTimer();
      
      mMainForm.addCommand(mStartCmd);
      mMainForm.removeCommand(mStopCmd);
      }
    else if (c.getLabel().equals("Reset") )
      {
      mMeetingTimer.reset();      // Reset count totals
      }
    else if (c.getLabel().equals("Help") )
      {
      // Go to Help screen
      Display.getDisplay(this).setCurrent(mHelpForm);
      }
  }
  
  
private class MyMeetingTimer extends MeetingTimer 
  {
  // The method to repaint the screen
  public void paint() 
    {
    // Now, update the timer on the main form
    mUpdateItem.setText("  Cost: "+getCost()+"\n  Hours: "+getHours());
    }
  }
    
    
}