import java.io.File;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
public class javaAccuracyCalculator{
					
	//Read in log.txt, grab first item in array of each line
	//Counter for everytime have readline
	//Calculate accuracy rate
    public static void main(String[] args) {   	
        try {
			if (args.length != 3) {
			System.out.println("Usage: imageClassifier <inputFilename> <classifierType> <outputFilename>");
			}
			else {
				String inputFilename = args[0];
				String classifierType = args[1];
				String outputFilename = args[2];
				FileReader fileReader = new FileReader(inputFilename);
				BufferedReader buf = new BufferedReader(fileReader);
				FileWriter fw = new FileWriter(outputFilename,true);
				String line = null;
				String[] item;
				float trueAccuracyRate  =0;
				float falseAccuracyRate =0;
				int trueCount	= 0;
				int falseCount  = 0;				
				int sheetMusicCount	= 0;
				int notSheetMusicCount	= 0;
				//Splits into each record, since readLine splits by "\n"
				while ((line = buf.readLine()) != null) {
					item = line.split("\t");		
					//Calculate AccuracyRates
					if(item[1].contains("TestImages/SheetMusic/")){
						sheetMusicCount++;
						if(item[3].equals("true")){
							trueCount++;
						}
					}
					if(item[1].contains("TestImages/NotSheetMusic/")){
						notSheetMusicCount++;
						if(item[3].equals("true")){
							falseCount++;
						}
					}						
				}
				
				//Amount of sheetMusic classified images / total amount of images read 
				trueAccuracyRate = ((float)trueCount/(float)sheetMusicCount)*(float)100;
				//Amount of notSheetMusic classified images / total amount of images read 
				falseAccuracyRate = ((float)falseCount/(float)notSheetMusicCount)*(float)100;
				
				fw.write("Classifier: " + classifierType + '\t' + "SheetMusicAccuracyRate: " + trueAccuracyRate + "%" + '\t' + "NotSheetMusicAccuracyRate :" + falseAccuracyRate + "%" + "\n");		
				buf.close();
				fw.close();								
			}
        }
        catch(Exception e){
            System.err.println(e);
        }
    }  
 
}