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


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

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



public class MessageCanvas extends Canvas
{
    private StudentSchedule schedule;
    private EAFrame parentFrame ;
    private Vector messages;

	public MessageCanvas(EAFrame parentFrame )
	{
	    this.parentFrame = parentFrame;
	    this.schedule = parentFrame.schedule;
	    messages = new Vector();
	}

	public void paint( Graphics g )
	{
	    removeAllMessages();
	    getUCMessages();
	    getICSMessages();
	    getPrerequisite();
	    int line = 0;
	    for(int i = 0; i< messages.size(); i++ )
	        g.drawString((String)messages.elementAt(i), 20, 17*line++ + 10);
	}

    void setSchedule( StudentSchedule schedule )
    {
        this.schedule = schedule;
    }

	public void removeAllMessages()
	{
	    messages.removeAllElements();
	}
	public void newLine()
	{
	    messages.addElement(new String(""));
	}



	public void getUCMessages()
	{
	   UCRequirement UCR = new UCRequirement();
	   float units = schedule.getUCIUnits();
	   messages.addElement( new String("     ******** UC MESSAGES ********     " ));
	   newLine();
	   if ( !UCR.metUnitRequirement(schedule))
	        messages.addElement( new String("Total number of units is "
	                + units + ", which is less than the required 180."));
	   else
	        messages.addElement( new String("Minimum Number of Units met."));

	   float GPA = schedule.getOverallGPA();
	   if ( !UCR.metGPARequirement(schedule))
	        messages.addElement( new String("Cumulative GPA is " +
	                GPA + ", which is less than 2.0." ));
	   // Breadth;
	   if ( UCR.metResidenceRequirement(schedule) )
	        messages.addElement( new String("Residence Requirement met.") );
	   else
	        messages.addElement( new String("Residence Requirement unmet.") );
       newLine(); newLine();

	}

	public void getICSMessages()
	{
	    ICSRequirement ICR = new ICSRequirement(parentFrame.courseList);
	    messages.addElement( new String("     ++++++++ ICS MESSAGES ++++++++     "));
	    newLine();
	    messages.addElement( new String("REQUIRED COURES:"));
	    newLine();
	    Enumeration temp = ICR.metRequire(schedule);
	    while( temp.hasMoreElements())
	    {
	        Course course = (Course) temp.nextElement();
	        messages.addElement( new String( "Required course " + course.getCourseId() +
	                    " is not on Schedule.") );
	    }
	    newLine();
	    messages.addElement( new String("INTEMEDIATE COURSES:"));
	    newLine();
	    String str = ICR.metIntemediate(schedule);
        messages.addElement( new String("Two intermediate ICS courses must be on Schedule."));
        messages.addElement( str );
        newLine();


        messages.addElement( new String("PROJECT COURSES"));
        newLine();
        messages.addElement( new String("Two ICS project courses must be on Schedule."));
	    temp = ICR.metProject(schedule);
	    while(temp.hasMoreElements())
	        messages.addElement((String)temp.nextElement());
        newLine();

        messages.addElement( new String("UPPER DIVISION MATH"));
        newLine();
	    str = ICR.metUDMath(schedule);
	    messages.addElement(str);
	}

	public void getPrerequisite()
	{
	    newLine();
	    messages.addElement( new String("     ======== ICS PREREQUISITES ========     "));
	    newLine();
	    Enumeration e = schedule.getAllCourses();
	    while (e.hasMoreElements())
	    {
	        CourseInfo cif = (CourseInfo)e.nextElement();
	        CourseId cid = cif.getCourseId();
	        Quarter q = cif.getQuarter();
	        ListedCourse hoodoo = parentFrame.courseList.getCourse(cid);
	        Prerequisite pre = hoodoo.getPrerequisite();
            if( hoodoo != null && !pre.hasBeenMetBefore(q,schedule))
            {
                messages.addElement( "Prerequisite " +
                    pre.nonMetPrerequisites(q,schedule) + " for course " +
                    cid + " has not been met.");
            }
        }

	}
	public void Debug(String mesg)
	{
	    System.out.println(mesg);
	}
}