import java.awt.*;
import java.io.*;
import java.net.*;
import java.awt.event.*;

public class TVSchedule extends java.applet.Applet implements ItemListener {
  
	Font f = new Font( "Arial Black", Font.ITALIC, 15 );

	DisplayPanel dataPanel;      			 // the display panel
  	String file;                 			 // the data file
	Label title;                  		         // label of the display
  	CheckboxGroup dayOfWeek;     		         // days of week for data
 	Checkbox monday, tuesday, wednesday, 		 // individual checkboxes
	  	 thursday, friday, saturday, sunday;   

	public void init() { 
    
		InputStream instream = null;
    		Panel controlPanelNorth = new Panel();

		    setLayout( new BorderLayout() );
    
   		// initialize the input stream and data panel
    		try { 
        		file = getParameter( "input" );
        		instream = new URL( getDocumentBase(), file ).openStream();
       			dataPanel = new DisplayPanel( instream );
       		}
    		catch ( IOException e ) { 
        		System.err.println
			( "I/O Exception:  probably bad filename or bad connection."
                 	+ e.getMessage() );
      		}

		// make the control panel
  		controlPanelNorth.setLayout( new FlowLayout( FlowLayout.LEFT, 5, 5) );

		title = new Label( "TV Listings" );
		title.setFont( f );

		dayOfWeek = new CheckboxGroup();
 		Panel DaysOfWeekPanel = new Panel();
  		DaysOfWeekPanel.setLayout( new GridLayout( 7, 1 ) );
		monday = new Checkbox( "Monday", dayOfWeek, true );
		monday.addItemListener( this );
		DaysOfWeekPanel.add( monday );
		tuesday = new Checkbox( "Tuesday", dayOfWeek, false );
		tuesday.addItemListener( this );
		DaysOfWeekPanel.add( tuesday );
		wednesday = new Checkbox( "Wednesday", dayOfWeek, false );
		wednesday.addItemListener( this );
		DaysOfWeekPanel.add( wednesday );
		thursday = new Checkbox( "Thursday", dayOfWeek, false );
		thursday.addItemListener( this );
		DaysOfWeekPanel.add( thursday );
		friday = new Checkbox( "Friday", dayOfWeek, false );
		friday.addItemListener( this );
		DaysOfWeekPanel.add( friday );
		saturday = new Checkbox( "Saturday", dayOfWeek, false );
		saturday.addItemListener( this );
		DaysOfWeekPanel.add( saturday );
		sunday = new Checkbox( "Sunday", dayOfWeek, false );
		sunday.addItemListener( this );
		DaysOfWeekPanel.add( sunday );

		controlPanelNorth.add( title );
  
  		// add the two components to the applet area
		add( "East", DaysOfWeekPanel );
		add( "North", controlPanelNorth );
		add( "Center", dataPanel );
	}

	public void itemStateChanged( ItemEvent e ) {
    
		if ( e.getSource() == monday ) {
      			dataPanel.settype( "Monday" );
    		}
    		else if ( e.getSource() == tuesday ) {
     			dataPanel.settype( "Tuesday" );
    		}
   		else if ( e.getSource() == wednesday ) {
    			dataPanel.settype( "Wednesday" );
    		}
    		else if ( e.getSource() == thursday ) {
      			dataPanel.settype( "Thursday" );
    		}  
    		else if ( e.getSource() == friday ) {
      			dataPanel.settype( "Friday" );
    		}  
    		else if ( e.getSource() == saturday ) {
      			dataPanel.settype( "Saturday" );
    		}  
    		else if ( e.getSource() == sunday ) {
      			dataPanel.settype( "Sunday" );
		}  
 
 		dataPanel.displayfile();
  	}
}

class DisplayPanel extends Panel {
  
	String datatype = "Days";   
  	StringBuffer buff;
  	Font f = new Font( "Gothic", Font.ITALIC, 18 );
  	TextArea ta;
  
  	// variables to hold the data from the file 
  	int numdata;
  	int showID[];
  	String TVshowNames[];
  	String showTimes[];
  	String showChannel[];
  	int maxlength;

	public DisplayPanel( InputStream instream ) { 
    
		setLayout( new BorderLayout() );
   		ta = new TextArea( "TV listings for the week . . .", 10, 30 );
    		ta.setFont ( f );
    		add( "Center", ta );
 
 		try {
      			StreamTokenizer intokens = new StreamTokenizer( instream );
      			intokens.parseNumbers(); 
      			intokens.slashSlashComments( true );
     			int tok = intokens.nextToken();  
      			numdata = (int) intokens.nval;
     			showID = new int[numdata];
     			TVshowNames = new String[numdata];
      			showTimes = new String[numdata];
      			showChannel = new String[numdata];

		        // read data items 
      			maxlength = 0;
      			
			for ( int i = 0; i < numdata; i++ ) { 
				tok = intokens.nextToken();
        			showID[i] = (int)intokens.nval;
			        tok = intokens.nextToken();
			        TVshowNames[i] = intokens.sval;
			        tok = intokens.nextToken();  
			        showTimes[i] = intokens.sval;
			  	tok = intokens.nextToken();
			        showChannel[i] = intokens.sval;
			        maxlength = Math.max( maxlength, TVshowNames[i].length() );
			}

		        // for debugging
      			for ( int i = 0; i < numdata; i++ ) { 
				System.out.println( showID[i] );
			        System.out.println( TVshowNames[i] );
			        System.out.println( showTimes[i] );
				System.out.println( showChannel[i] );
			}
    		}
    		catch ( IOException e ) {
			System.err.println
          		( "I/O Exception:  Reading data from file"
       		        + e.getMessage() );
      		}
 	 }

  public void settype ( String s ) {
    
	datatype = s;
  }

  public void displayfile() {
 
 	buff = new StringBuffer();
	Color MondayColor = new Color( 127, 0, 0 );
	Color TuesdayColor = new Color( 0, 127, 127 );
        Color WednesdayColor = new Color( 0, 127, 0 );
        Color ThursdayColor = new Color( 0, 0, 127 );
        Color FridayColor = new Color( 127, 0, 127 );
        Color SaturdayColor = new Color( 127, 127, 127 );
        Color SundayColor = new Color( 127, 127, 0 );

        for ( int i = 0; i < numdata; i++ ) { 
        	if ( datatype.equals( "Monday" ) && showID[i] <= 100 )
          		appendtext( MondayColor, TVshowNames[i], showTimes[i], showChannel[i] );
        	if ( datatype.equals( "Tuesday" ) && ( ( showID[i] > 100 ) && ( showID[i] <= 200 ) ) )
          		appendtext( TuesdayColor, TVshowNames[i], showTimes[i], showChannel[i] );
	        if ( datatype.equals( "Wednesday" ) && ( ( showID[i] > 200 ) && ( showID[i] <= 300 ) ) )
        		appendtext( WednesdayColor, TVshowNames[i], showTimes[i], showChannel[i] );
       		if ( datatype.equals( "Thursday" ) && ( ( showID[i] > 300 ) && ( showID[i] <= 400 ) ) )
          		appendtext( ThursdayColor, TVshowNames[i], showTimes[i], showChannel[i] );
        	if ( datatype.equals( "Friday" ) && ( ( showID[i] > 400 ) && ( showID[i] <= 500 ) ) )
          		appendtext( FridayColor, TVshowNames[i], showTimes[i], showChannel[i] );
        	if ( datatype.equals( "Saturday" ) && ( ( showID[i] > 500 ) && ( showID[i] <= 600 ) ) )
          		appendtext( SaturdayColor, TVshowNames[i], showTimes[i], showChannel[i] );
   	        if ( datatype.equals( "Sunday" ) && ( ( showID[i] > 600 ) && ( showID[i] <= 700 ) ) )
          		appendtext( SundayColor, TVshowNames[i], showTimes[i], showChannel[i] );
      	}
    
	ta.setText( buff.toString() );
  }

  public void appendtext ( Color c, String s, String t, String h ) {

    	ta.setForeground ( c );
    	int diff = maxlength - s.length();

    	buff.append( s + "      ");
    	for ( int i = 0; i < diff; i++ ) buff.append( " " );
    	buff.append( "  " + t );
   	buff.append( "  " + h + "\n" );
  }
}