/*******************************
* Name: Huy Nguyen             *
* Lab #5                       *
* Fall 1998, ICS 52            *
********************************/


// ScheduleDialog.java -- ICS 52 homework #5 -- Fall, 1998

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.lang.Integer.*;
import java.io.*;
import SAO.*;

public class ScheduleDialog extends Dialog
{

    Label           lblCourseNumber, lblCourseTitle, lblDept, lblQuarter,
                    lblYear, lblGrade, lblUnit, lblList;
	TextField       txtCourseTitle, txtCourseNumber, txtUnit, txtYear;
	Choice          choiceQuarter, choiceDept, choiceGrade;
	Button          btnAdd, btnRemove;
	Checkbox        radioTaken, radioPlanned, radioTransfered;
	CheckboxGroup   Group1;
	ListScrollPane  scrollList;
	StudentSchedule schedule;
	EAFrame           parentFrame;
	SAOCourseList   courseList;

	public ScheduleDialog(EAFrame parentFrame)
	{
	    super(parentFrame, "Edit Schedule Dialog", true);
	    this.schedule = parentFrame.schedule;
	    this.parentFrame = parentFrame;
	    this.courseList = parentFrame.courseList;

		setLayout(null);
		setVisible(false);
		setSize(450,470);
		setResizable(false);
		setBackground(Color.lightGray);

		lblUnit = new Label("Unit:");
		lblUnit.setBounds(204,144,30,20);
		add(lblUnit);

		txtUnit = new TextField();
		txtUnit.setBounds(252,144,80,20);
		txtUnit.setVisible( false );
		add(txtUnit);

		lblCourseNumber = new Label("Course No.:");
		lblCourseNumber.setBounds(16,120,68,20);
		add(lblCourseNumber);

		lblCourseTitle = new Label("Course Title:",Label.RIGHT);
		lblCourseTitle.setBounds(12,72,72,20);
		add(lblCourseTitle);

		lblDept = new Label("Department:",Label.RIGHT);
		lblDept.setBounds(12,96,72,20);
		add(lblDept);

		lblQuarter = new Label("Quarter:");
		lblQuarter.setBounds(192,96,60,20);
		add(lblQuarter);

		lblGrade = new Label("Grade:",Label.RIGHT);
		lblGrade.setBounds(36,144,48,20);
		add(lblGrade);

		txtCourseTitle = new TextField(17);
		txtCourseTitle.setBounds(96,72,236,20);
		txtCourseTitle.setVisible(false);
		add(txtCourseTitle);

		txtCourseNumber = new TextField();
		txtCourseNumber.setBounds(96,120,72,20);
		add(txtCourseNumber);

		choiceGrade = new Choice();
		Grade temp = new Grade("A");
		choiceGrade.addItem(" ");    // empty grade for planned or Taking course.
		String[] grades = temp.getGrades();
		for(int i = 0; i<grades.length; i++)
		    choiceGrade.addItem(grades[i]);
		try {
			choiceGrade.select(0);
		}
		catch (IllegalArgumentException e) { }
		choiceGrade.addItemListener(new GradeListener());
		add(choiceGrade);
		choiceGrade.setBounds(96,144,72,20);

		choiceQuarter = new Choice();
		choiceQuarter.addItem("WINTER");
		choiceQuarter.addItem("SPRING");
		choiceQuarter.addItem("SUMMER");
		choiceQuarter.addItem("FALL");
		try {
			choiceQuarter.select(0);
		}
		catch (IllegalArgumentException e) { }
		add(choiceQuarter);
		choiceQuarter.setBounds(252,96,80,20);

		lblYear = new Label("Year:");
		lblYear.setBounds(204,120,36,20);
		add(lblYear);

		choiceDept = new Choice();
		Enumeration e = courseList.getAllDepts();
		while(e.hasMoreElements())
		{
		    String str = (String) e.nextElement();
		    choiceDept.addItem( str );
		}
		try {
			choiceDept.select(1);
		}
		catch (IllegalArgumentException ill) { }
		choiceDept.addItemListener( new ChoiceListener());
		add(choiceDept);
		choiceDept.setBounds(96,96,72,19);
		choiceDept.setFont(new Font("Dialog", Font.PLAIN, 12));

		txtYear = new TextField();
		txtYear.setBounds(252,120,80,20);
		add(txtYear);

		btnAdd = new Button("Add");
		btnAdd.setBounds(348,104,62,26);
		btnAdd.setBackground(new Color(12632256));
		btnAdd.addActionListener( new ButtonListener());
		add(btnAdd);

		btnRemove = new Button();
		btnRemove.setLabel("Remove");
		btnRemove.setBounds(348,140,62,26);
		btnRemove.setBackground(new Color(12632256));
		btnRemove.addActionListener( new ButtonListener() );
		add(btnRemove);

		Group1 = new CheckboxGroup();
		RadioListener radioListener = new RadioListener();
		radioTaken = new Checkbox("Passed", Group1, false);
		radioTaken.setState(true);
		radioTaken.addItemListener( radioListener );
		radioTaken.setBounds(30,174,70,16);
		add(radioTaken);
		radioTransfered = new Checkbox("Transfered", Group1, false);
		radioTransfered.setBounds(120,174,80,16);
		add(radioTransfered);
		radioPlanned = new Checkbox("Planned or Taking", Group1, false);
		radioPlanned.setBounds(220,174,150,16);
		radioPlanned.addItemListener( radioListener );
		add(radioPlanned);

		lblList = new Label("COURSE LIST");
		lblList.setBounds(160,210,144,20);
		add(lblList);

		scrollList = new ListScrollPane(schedule,false);
		scrollList.setBounds(24,240,324,192);
		add(scrollList);

		setTitle("Schedule Dialog");
		this.addWindowListener( new MyWindowAdapter() );
		setVisible(true);
	}

	class MyWindowAdapter extends WindowAdapter
	{
		public void windowClosing(WindowEvent event)
		{
		    parentFrame.setSchedule( schedule );
		    parentFrame.setScrollList( scrollList);
		    dispose();
		}
	}

	boolean checkCourseID()
	{
	    if( txtCourseNumber.getText().equals("") )
	    {
	        messageBox("Course Number cannot be null", true);
	        return true;
	    }
	    return false;
	}
	boolean checkYear()
	{
	    if( txtYear.getText().equals("") )
	    {
	        messageBox("Quarter must be specified for passed Course", true);
	        return true;
	    }
	    int year = java.lang.Integer.parseInt(txtYear.getText());
	    if (year>2002 || year < 1995 )
	    {
	        messageBox("Year must be from 1995 to 2002", true);
	        return true;
	    }
	    return false;
	}
	int checkQuarter()
	{
	   return choiceQuarter.getSelectedIndex();
	}

	int checkUnit()
	{
	    String units = txtUnit.getText();
	    int temp;
	    try {
    	    temp = java.lang.Integer.parseInt(units);
    	} catch (NumberFormatException e)
    	{
    	    messageBox("Units must be an integer value",true);
	        return -1;
	    }
	    if (temp <= 0)
	    {
	        messageBox("Units must be a positive integer",true);
	        return -1;
	    }
	    return temp;
	}


	public void addCourse()
    {
        boolean passed = false;
        if (radioTransfered.getState() || radioTaken.getState() )
            passed = true;
        boolean ICS = choiceDept.getSelectedItem().equals("ICS");
        CourseInfo newCourse;
        ListedCourse temp;
        if(checkCourseID() || checkYear())
            return;
        CourseId c= new CourseId(choiceDept.getSelectedItem(),txtCourseNumber.getText());
        if ( schedule.indexOf( c ) >= 0 )
        {
            messageBox("The same course already existed in the schedule. Please verify.",true);
            return;
        }
        Quarter q = new Quarter(checkQuarter(),java.lang.Integer.parseInt(txtYear.getText()));
        String grade = choiceGrade.getSelectedItem();
        if( grade.equals(" ") && passed )
        {
            messageBox("Grade is null. Please check if course is planned",true);
            return;
        }
        if ( !ICS && (txtCourseTitle.getText().equals(null) || txtUnit.getText().equals(null)) )
        {
            messageBox("Either CourseTitle, Unit or Department is not correct. Please verify.",true);
            return;
        }
        if ( !ICS && checkUnit()< 0  )
        {
            return;
        }
        else if ( ICS )
        {
            temp = courseList.getCourse( c );
	        if ( temp == null)
	        {
	            messageBox("Course not found. Please check Department name or Course number", true);
	            return;
	        }
	    }
	    //---------------------//
	    if(passed)
	    {
	        Grade g = new Grade(grade);
            newCourse = new CourseInfo( c, q, g, (radioTaken.getState()?
                                       CourseInfo.PASS : CourseInfo.TRANSFER) );
        }
        else
        {
            newCourse = new CourseInfo( c, q, CourseInfo.PLAN );
	    }

        if( !ICS )
        {
            newCourse.setTitle( txtCourseTitle.getText() );
            newCourse.setUnits( checkUnit() );
        }
        schedule.addCourse( newCourse );
        schedule.modified = true;
        scrollList.setSchedule( schedule );
        parentFrame.scrollList.setSchedule( schedule );
        txtCourseTitle.setText("");
        txtUnit.setText("");

	}

	public void removeCourse()
	{
	    int index = scrollList.getSelectedIndex();
	    schedule.removeCourse( index );
	    schedule.modified = true;
	    scrollList.setSchedule( schedule );
        parentFrame.scrollList.setSchedule( schedule );
        parentFrame.setScrollList(scrollList);

	}

	class ButtonListener implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			Object object = event.getSource();
			if (object == btnAdd)
			    addCourse();
			else if ( object == btnRemove )
			{
			    Debug("are you here?");
			    removeCourse();
			}
			else
			    return;
		}
	}
	class ChoiceListener implements ItemListener
	{
	    public void itemStateChanged( ItemEvent event )
	    {
	        Object obj = event.getItem();
	        if (! obj.toString().equals("ICS"))
	        {
	            txtCourseTitle.setVisible(true);
	            txtUnit.setVisible(true);
	        }
	        else
	        {
	            txtCourseTitle.setVisible(false);
	            txtUnit.setVisible(false);
	        }
	    }
	}
	class RadioListener implements ItemListener
	{
	    public void itemStateChanged( ItemEvent event )
	    {
	        Object obj = event.getSource();
	        try {
	            if (obj == radioPlanned )
			        choiceGrade.select(0);
			    else
		            choiceGrade.select(1);
		    } catch (IllegalArgumentException e) { }
		}
	}
	class GradeListener implements ItemListener
	{
	    public void itemStateChanged(ItemEvent event )
	    {
	        if(choiceGrade.getSelectedItem().equals(" "))
	            radioPlanned.setState(true);
	        else
	            radioTaken.setState(true);
	    }
	}

	public void messageBox(String mesg,boolean button)
	{
	    Attention a = new Attention(parentFrame,true,mesg,button);
	    a.show();
	}
	public void Debug(String mesg)
	{
	    System.out.println(mesg);
	}

}