import jm.JMC;
import jm.music.data.*;
import jm.music.tools.*;
import jm.util.*;
import java.util.Vector;
import java.awt.event.*;
import java.awt.*;
import java.util.Enumeration;

/**
 * This class does statistical analysis on MIDI files
 * It prompts the user to select a file
 * this proceedure repeats until the user selects 'cancel'
 * @author Andrew R. Brown
 */
 
public final class SimpleAnalysis extends Frame implements JMC{
	static int highNote = 0;
	static int lowNote = 127;
	static double longestRhythm = 0.0;
	static double shortestRhythm  = 1000.0;
	static int shortLength = 1000000;
	static int longLength = 0;
	static int ascending = 0;
	static int descending = 0;
	static int prev = 60;
	static Score s = new Score();
	static int scoreCount = 0;
	
        private static final String PRE_TEXT = 
        "========================================================\n";
	
        public static void main(String[] args){
		new SimpleAnalysis();
	}
		
	public SimpleAnalysis() {
		FileDialog fd;
		Frame f = new Frame();
						
		for(;;) {		
	 		//open a MIDI file
	 		fd = new FileDialog(f,
                                            "Open MIDI file or choose cancel to"
                                            + " finish.",
                                            FileDialog.LOAD);
			fd.show();
		
			//break out when user presses cancel
			if(fd.getFile() ==null) break;
			
			Read.midi(s, fd.getDirectory()+fd.getFile());
			s.setTitle(fd.getFile());
			
			//keep track of the number of scores analysed
			scoreCount++;
			//reset melody length
			int tempLength = 0;
			// iterate through each note
			//find the highest and lowest notes		
			Enumeration enum = s.getPartList().elements();
			while(enum.hasMoreElements()){
				Part nextPt = (Part)enum.nextElement();
				Enumeration enum2 = 
                                              nextPt.getPhraseList().elements();
				while(enum2.hasMoreElements()){
					Phrase nextPhr = 
                                                    (Phrase)enum2.nextElement();
					Enumeration enum3 = 
                                               nextPhr.getNoteList().elements();
					while(enum3.hasMoreElements()){
						Note nextNote = 
                                                      (Note)enum3.nextElement();
						int pitch = nextNote.getPitch();
						//check range
						pitchRange(pitch);
						double rv = 
                                                      nextNote.getRhythmValue();
						//check rhythmic values
						rhythmRange(rv);
						//check meldoy length
						tempLength++;
						//check direction
						upOrDown(pitch);
					}
				}
			}
			//update length extremes
			musicLength(tempLength);
			
			//output the current stats
                        System.out.print(PRE_TEXT);
			System.out.println("STATS after "+scoreCount+
                                           " files. Last score called "+
                                           s.getTitle());
                        System.out.print(PRE_TEXT);
			System.out.println("Lowest note is "+lowNote);
			System.out.println("Highest note is "+highNote);
			System.out.println("---------------------------------");
			System.out.println("Shortest note is "+shortestRhythm);
			System.out.println("Longest note is "+longestRhythm);
			System.out.println("---------------------------------");
			System.out.println("Smallest score contains "+
                                           shortLength+" notes");
			System.out.println("Largest score contains "+longLength+
                                           " notes");
			System.out.println("---------------------------------");
			System.out.println("Upward movements were "+ascending);
			System.out.println("Downward movements were "+
                                           descending);
			System.out.println("---------------------------------");
		}
	}
		
	public void pitchRange(int pitch) {
		//check the range of the MIDI file
		if(pitch < lowNote) lowNote = pitch;
		if(pitch > highNote) highNote = pitch;
	}	
	
	public void rhythmRange(double rv) {
		//check the range of the MIDI file
		if(rv < shortestRhythm) shortestRhythm = rv;
		if(rv > longestRhythm) longestRhythm = rv;
	}	
	
	public void musicLength(int temp) {
		if(temp < shortLength) shortLength = temp;
		if(temp > longLength) longLength = temp;
	}	
	
	public void upOrDown(int pitch) {
		if(pitch < prev) descending++;
		if(pitch > prev) ascending++;
		prev = pitch;
	}
}