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 */
package adrianmom;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

/**
 *
 * @author Archer
 */
public class AdrianMom {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        Map<String, Double> students = new HashMap<>();
        boolean running = true;
        Scanner scan = new Scanner(System.in);
        while(running){
            String name;
            double grade;
            System.out.print("Please enter student name: ");
            name = scan.nextLine();
            System.out.print("Please enter student grade: ");
            grade = scan.nextDouble();
            students.put(name, grade);
            System.out.print("Add more students? 1 for yes, any other number for no: ");
            int proceed;
            proceed = scan.nextInt();
            if(!(proceed == 1)){
                running = false;
            }
            scan.nextLine();
        }

        /**
         * Calculates the average class test grade
         */
        double gradeTotal = 0;
        double highestGrade = Double.MIN_VALUE;
        for (Double grade : students.values()) {
            gradeTotal += grade;
            if(grade > highestGrade)
                highestGrade = grade;
        }

        double classAverage = gradeTotal/students.size();
        ArrayList<String> studentsBelowAvg = new ArrayList<>();
        ArrayList<String> studentsHighestTest = new ArrayList<>();

        /**
         * Runs through hash map entries, finding the students
         * with the highest test grade and below average test grades
         */
        for (Map.Entry entry : students.entrySet()) {
            String key = (String)entry.getKey();
            Double value = (Double)entry.getValue();
            if(value < classAverage)
                studentsBelowAvg.add(key);
            if(value == highestGrade)
                studentsHighestTest.add(key);
        }

        /**
         * Prints out student data extracted from the arrayLists
         */
        System.out.println("Class Average: " + classAverage + "%");
        System.out.println("Students with below average test grades:");
        for(String studentName : studentsBelowAvg){
            System.out.println(studentName);
        }
        System.out.println("Next time study for the test!");
        System.out.println("");
        System.out.println("Students with the highest test grade:");
        for(String studentName : studentsHighestTest){
            System.out.println(studentName);
        }
    }
}