// CSE 142, Summer 2008 (Marty Stepp)
// This program processes a file of employee data and outputs
// each employee's hours worked and hours per day.
//
// The program demonstrates line-based file processing and using
// a Scanner to tokenize the contents of each individual line.
//
// This second version demonstrates file searching.
// It asks the user for an ID and only shows employee(s) that match it.

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

public class Hours2 {
	public static void main(String[] args) throws FileNotFoundException {
		Scanner console = new Scanner(System.in);
		System.out.print("Enter an ID: ");
		int desiredID = console.nextInt();
	
		Scanner input = new Scanner(new File("hours.txt"));
		boolean found = false;   // boolean flag; set to true if we find a match
		
		while (input.hasNextLine() && !found) {
			// "123 Susan 12.5 8.1 7.6 3.2"
			String line = input.nextLine();
			Scanner lineScanner = new Scanner(line);
			
			int id = lineScanner.nextInt();       // 123
			if (id == desiredID) {
				found = true;
				String name = lineScanner.next();  // "Susan"
				
				// cumulative sum of all hours worked by this employee
				double sum = 0.0;
				int days = 0;
				while (lineScanner.hasNextDouble()) {
					sum = sum + lineScanner.nextDouble();
					days++;
				}
				
				System.out.println(name + " (ID#" + id + ") worked " + 
						sum + " hours (" + (sum/days) + " / day)");
			}
		}
		
		if (!found) {
			// never found a match; print error message
			System.out.println("ID#" + desiredID + " not found.");
		}
	}
}