//=============================================================================
// Program : Quiz Scores
// Author  : Daniel Luce
// Date    : 10/02/2015
// Abstract: Extract student information from database. Sort scores, average
//           said scores, and then display the information in descending order.
//=============================================================================

import java.io.*;
import java.util.StringTokenizer;
public class LuceP02quizScores
{
  public static void main(String args[])throws IOException
  {
    FileReader      diskld = new FileReader(new File("p2-quiz-scores.txt"));
    BufferedReader  fileld = new BufferedReader(diskld);
    int numEntries = 0;
    StringTokenizer tkn;
    String          rec;
    String namesTemp[] = new String[500];
    float gradesTemp[][] = new float[500][17];
    int scores[] = new int [12];
    int i = 0;
    int j;
    int k;


    while((rec=fileld.readLine()) !=null)
      {

        j   = 0;
        k   = 0;

        tkn = new StringTokenizer(rec,";,");
        namesTemp[i] = tkn.nextToken();

        while (tkn.hasMoreElements())
          {
            gradesTemp[i][j] = Integer.parseInt(tkn.nextToken());
            j++;
          }

        sortScores(gradesTemp[i]);
        averageTwelve(gradesTemp[i]);

        i++;
        numEntries++;

      }

    String      names[] = new String[numEntries];
    float       grades[][] = new float[numEntries][17];

    for(int n = 0; n < numEntries; n++)
      { //copy elements into accurately sized arrays
        names[n] = namesTemp[n];
        grades[n] = gradesTemp[n];
      }

    sortStudents(names, grades);
    countsGrades(grades,scores);
    displayInformation(names,grades,scores);

  }
  //--------------------------------------------------------
  public static void sortScores(float[] grades) //bubblesorts given array of ints
  {
    float temp;                                 //holding variable
    boolean swapped = true;                     //checks for swaps, true to run at least once
    while (swapped)
      {
        swapped = false;
        for(int i=0; i < grades.length-1; i++)
          {
            if(grades[i] < grades[i+1])
              {
                temp = grades[i];              //swap elements
                grades[i] = grades[ i+1 ];
                grades[i+1] = temp;
                swapped = true;               //shows a swap occurred
              }
          }
      }
  }
  //-----------------------------------------------------------------
  public static void sortStudents(String[] names, float[][] grades) //sorts students by average grades using bubble sort
  {
    float[] tempGrades;                     //holding variable for grade records
    String tempNames;                       //holding variable for name records
    int avgIndex = grades[0].length - 1;    //index of average grades
    boolean swapped = true;                 //checks for swaps, true to run at least once
    while (swapped)
      {
        swapped = false;
        for(int j=0; j < grades.length-1; j++)
          {
            if(grades[j][avgIndex] < grades[j+1][avgIndex])
              {
                //prepare to swap
                tempGrades = grades[j];
                tempNames = names[j];

                //swap grades
                grades[j] = grades[j+1];
                grades[j+1] = tempGrades;

                //swap names
                names[j] = names[j+1];
                names[j+1] = tempNames;
                swapped = true; //shows a swap occurred
              }
          }
      }
  }
  //--------------------------------------------------------
  public static void averageTwelve(float[] grades)
  {
    float avg = 0;
    for(int i = 0; i < 12; i++)
      {
        avg += grades[i];
      }
    grades[grades.length - 1] = (float) (avg/12.0);
  }
  //--------------------------------------------------------
  public static void countsGrades(float[][] grades,int[] scores)
  {
    int i = 0;
    for(i = 0; i < grades.length; i++)
      {
        if(grades[i][16] >= 90 && grades[i][16] <=100)
        {
          scores[0] += 1;
        }
        else
        if(grades[i][16] >=80 && grades[i][16]<90)
          {
            scores[1] += 1;
          }
        else
        if(grades[i][16] >=70 && grades[i][16]<80)
          {
            scores[2] += 1;
          }
        else
        if(grades[i][16] >=60 && grades[i][16]<70)
          {
            scores[3] += 1;
          }
        else
        if(grades[i][16] >=0 && grades[i][16]<60)
          {
            scores[4] += 1;
          }
      }
  }
  //---------------------------------------------------------
  public static void displayInformation(String[] names, float[][] grades, int[] scores)
  {

    System.out.println();
    System.out.println("Project 2 Daniel Luce");
    System.out.println();
    System.out.println("Num Name           Avg Best 12");
    System.out.println("--- -------------  -----------");
    for(int i = 0; i < names.length; i++) //loop through to print names, averages
      {
        System.out.printf("%2d. %-17s %.1f%n", i+1, names[i], grades[i][grades[i].length-1]);
      }

    System.out.println();
    System.out.println("A = " + scores[0]);
    System.out.println("B = " + scores[1]);
    System.out.println("C = " + scores[2]);
    System.out.println("D = " + scores[3]);
    System.out.println("F = " + scores[4]);
  }
}