package test5;

public class AverageMatch {

    private static int[] student = {2, 3, 1, 7, 5};

    private static String[] movies = {"movie1", "movie2"};

    private static int[][] friends = {
            {1, 3, 4, 5, 7},
            {3, 5, 8, 6, 9},
            {6, 4, 1, 2, 3},
            {9, 7, 5, 3, 1},
            {8, 6, 4, 2, 1}
    };

    /*
        int matches

        for each entry in student
            for each row in friends
                for each column in friends
                    if student entry matches friend[row][column]
                        increment matches
                    end if
                end for
            end for
        end for


        matches > 0 ?
            print average (matches / friends.length)
        else
            print no matches
     */

    public static void main(String[] args) {
        int matches = 0;
        int average;

        for (int i = 0; i < friends.length; i++) {
            matches += sharedPreferences(student, friends[i]);
        }

        if (matches > 0) {
            average = matches / friends.length;

            System.out.println("The five friends share on average " + average + " preferences with the student");
        } else {
            System.out.println("No matches");
        }
    }

    public static int sharedPreferences(int[] studentPreferences, int[] friendPreferences) {
        int matches = 0;

        for (int i = 0; i < studentPreferences.length; i++) {
            for (int j = 0; j < friendPreferences.length; j++) {
                if (studentPreferences[i] == friendPreferences[j]) {
                    matches++;
                }
            }
        }

        return matches;
    }
}