// This program searches an input file of employees' hours worked
// for a particular employee and outputs that employee's hours data.
//
// Second version that uses a method and demonstrates the use of null.

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

public class HoursWorked2 {
    public static void main(String[] args) throws FileNotFoundException {
        Scanner console = new Scanner(System.in);
        System.out.print("Enter a name: ");
        String searchName = console.next();   // "BRAD"
        
        Scanner input = new Scanner(new File("hours.txt"));
        Scanner lineScan = search(input, searchName);
                
        if (lineScan == null) {
            System.out.println("Not found!");
        } else {
            // process the line
            double sum = 0.0;
            int count = 0;
            while (lineScan.hasNextDouble()) {
                double hours = lineScan.nextDouble();
                sum += hours;
                count++;
            }

            double average = sum / count;
            System.out.println(searchName + " worked " + sum + 
                               " hours (" + average + " hours/day)");
        }
    }
    
    // Searches the input file for the record of the person with the given
    // name.  Returns the line containing this record, or null if not found.
    public static Scanner search(Scanner input, String searchName) {
        while (input.hasNextLine()) {
            String line = input.nextLine();   // "456 Brad 4.0 11.6 6.5 2.7 12"
            Scanner lineScan = new Scanner(line);
            int id = lineScan.nextInt();      // 456
            String name = lineScan.next();    // "Brad"
            if (name.equalsIgnoreCase(searchName)) {
                return lineScan;
            }
        }
        
        return null;  // not found
    }
}