import java.io.*; // for File
import java.util.*; // for Scanner, Arrays

/*
 * CSE 142
 * Arrays For Tallying
 * Section Attendance
 *
 * This program calculates and prints the quiz section attendance
 * points and grades for each student in each quiz section.
 *
 * This version demonstrates printing to a file.
 */
public class SectionAttendance2 {
	public static void main(String[] args) throws FileNotFoundException {
		// get a scanner on the file, and loop through each line
		Scanner input = new Scanner(new File("section.txt"));
		// creates a new file if needed or overwrites an existing file
		PrintStream out = new PrintStream(new File("output.txt"));
		int section = 1;
		while (input.hasNextLine()) {
			String line = input.nextLine();
			int[] totalPoints = getPoints(line);
			capPoints(totalPoints);
			double[] percents = getPercents(totalPoints);
			printStats(out, section, totalPoints, percents);
			// printStats(System.out, section, totalPoints, percents);

			section++;
		}
	}
	
	// Calculate each student's points within a given section.
	// Return an int[] with student 0's points at element 0,
	// student 1's points at element 1 etc.
	// Uses the cumulative sum pattern we discussed.
	public static int[] getPoints(String line) {
		// Make an array, where each element is the points for a student
		int[] totalPoints = new int[5];
		// 5 students -> length 5 array
		// for each character in the string
		for (int i = 0; i < line.length(); i++) {
			char attendance = line.charAt(i);
			int points = 3; // assume student gets 3 points
			if (attendance == 'a') {
				points = 0;
			} else if (attendance == 'n') {
				points = 1;
			}
			// 0, 5, 10, 15... -> 0
			// 1, 6, 11, 16... -> 1
			// find correct student using mod by the number of students
			// add 0, 1, or 3 points to the correct student
			int curStudent = i % totalPoints.length;
			totalPoints[curStudent] += points;
		}
		return totalPoints;
	}
	
	// Cap the points for each student at 20.
	// Uses the min pattern we discussed.
	public static void capPoints(int[] points) {
		for (int i = 0; i < points.length; i++) {
			points[i] = Math.min(20, points[i]);
		}
	}
	
	// Calculate the percentage for each student out of a possible 20 points.
	public static double[] getPercents(int[] points) {
		double[] percents = new double[points.length];
		for (int i = 0; i < points.length; i++) {
			percents[i] = points[i] * 100.0 / 20.0;
		}
		return percents;
	}
	
	// Print the stats for a section in the following format:
	// Section #
	// Student points: [#, #, #, #, #]
	// Student grades: [#.#, #.#, #.#, #.#, #.#]
	// Output goes to the given PrintStream
	public static void printStats(PrintStream out, int section, int[] totalPoints, double[] percents) {
		out.println("Section " + section);
		out.println("Student points: " +
				Arrays.toString(totalPoints));
		out.println("Student grades: " +
				Arrays.toString(percents));
		out.println();
	}
}