package average;
import java.util.Scanner;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.lang.SecurityException;
import java.nio.file.NoSuchFileException;
import java.util.Formatter;
import java.util.FormatterClosedException;
import java.util.NoSuchElementException;
import java.util.InputMismatchException;


public class Average {

	private static Formatter output;

	static Scanner input = new Scanner(System.in);
	static int[] numbers = new int[10];

		public static void main(String[] args)
			{
				openFile();
				addRecords();
				closeFile();
				readRecords();
			}
		public static void openFile()
			{
				try
				{
					output = new Formatter("numbers.txt");
				}
				catch (SecurityException securityException)
				{
					System.err.println("Write permission denied. Terminating.");
					System.exit(1);
				}
				catch (FileNotFoundException fileNotFoundException)
				{
					System.err.println("Error opening file. Terminating.");
					System.exit(1);
				}
			}
		public static void addRecords()
			{
				System.out.print("Hello, welcome to my magical program!\n");

				for (int i = 0 ; i < 10 ; i++) {
					System.out.printf("Please enter integer no. %d: ", i+1);
					numbers[i] = input.nextInt();
					System.out.println();
					{
						try
						{
							output.format("Inputted integer: %s%n", String.valueOf(numbers[i]));
						}
						catch (FormatterClosedException formatterClosedexception)
						{
							System.err.println("Error writing to the file. Terminating.");
							break;
						}
						catch (InputMismatchException inputMismatchException)
						{
							System.err.println("Please restart the program and enter integers ONLY.");
							break;
						}
						catch (NoSuchElementException elementException)
						{
							System.err.println("Invalid input. Please try again.");
							input.nextLine();
						}
					}
	            }
		    }
			public static void closeFile(){
				{
					if (output != null)
						output.close();
				}
			}
			public static void readRecords()
			{
				try (BufferedReader br = new BufferedReader (new FileReader("numbers.txt"))){

					String line;
					int[] number = new int[10];
					int i=-1;
					int sum = 0;
					double average = 0;

					while ((line = br.readLine()) != null) {
						i++;
						String[] split = line.split(":");
						line = split[1].trim();
						number[i] = Integer.parseInt(line);
						System.out.printf("Integer number %d: %d%n", i, numbers[i]);
						sum += number[i];
				    	average = (double) sum/10;
					}

					System.out.printf("%nWould your sum happen to be %d? %n", sum);
					System.out.printf("Which means your average is: %.2f %n", average);

				}
				catch (NoSuchFileException noSuchFileException)
				{
					System.out.print("This file was not created properly and cannot be found.");
				}
				catch (FileNotFoundException fileNotFoundException)
				{
					System.out.print("I can't seem to find your file :( That's too bad...");
				}
				catch (IOException ioexception)
				{
					System.out.print("Whoopsie daisy, you got yourself an IOException. Better luck next time!");
				}
				finally
				{
					System.out.print("Check your numbers.txt file and see what ya got!");
				}
			}
}