/* Lesley Hogan
 * June 30th 2006
 * Triathlon.java
 * Calculate Ironman triathlon equivalents from normal triathlon times
 * CS 101 HW J1:
 * http://www.cs.virginia.edu/~asb/teaching/cs101-spring06/hws/hwj1/index.html
 */

package net.bunnie.uva.cs101;

import java.util.*;

public class Triathlon {
    public static void main (String[] args) {
		final double KILOMETERS_PER_MILE = 1.609344;
		final double OLYMPIC_SWIM_LENGTH_KM = 1.5;
		final double OLYMPIC_BIKE_LENGTH_KM = 40;
        final double OLYMPIC_RUN_LENGTH_KM = 10;
        final double IRONMAN_SWIM_LENGTH_KM = 3.8;
		final double IRONMAN_BIKE_LENGTH_KM = 180;
        final double IRONMAN_RUN_LENGTH_KM = 42.195;
        
        //legend
        System.out.println("Ironman Triathlon: how long will it take you?\n");
		
		//gather data
		Scanner stdin = new Scanner (System.in);
		System.out.println("Your Olympic Triathlon times in hours, please:");
		System.out.print("Swim: ");
		double olympicSwimTime = stdin.nextDouble();
		System.out.print("Bike: ");
		double olympicBikeTime = stdin.nextDouble();
		System.out.print("Run: ");
		double olympicRunTime = stdin.nextDouble();
		System.out.print("Your Olympic Triathlon times: ");
        System.out.print("Swim, " + olympicSwimTime + "; ");
        System.out.print("Bike, " + olympicBikeTime + "; ");
        System.out.print("Run, " + olympicRunTime + "\n\n");
        //displays 1.0, 2.0, 1.0
        
        //computations
        double kilometerSwimRate = olympicSwimTime * 60 / OLYMPIC_SWIM_LENGTH_KM;
        double kilometerBikeRate = olympicBikeTime * 60 / OLYMPIC_BIKE_LENGTH_KM;
        double kilometerRunRate = olympicRunTime * 60 / OLYMPIC_RUN_LENGTH_KM;
        double mileSwimRate = kilometerSwimRate * KILOMETERS_PER_MILE;
        double mileBikeRate = kilometerBikeRate * KILOMETERS_PER_MILE;
        double mileRunRate = kilometerRunRate * KILOMETERS_PER_MILE;
        double ironmanSwimTime = kilometerSwimRate * IRONMAN_SWIM_LENGTH_KM / 60;
        double ironmanBikeTime = kilometerBikeRate * IRONMAN_BIKE_LENGTH_KM / 60;
        double ironmanRunTime = kilometerRunRate * IRONMAN_RUN_LENGTH_KM / 60;
        double ironmanTotalTime = ironmanSwimTime + ironmanBikeTime + ironmanRunTime;
        
        //display computations
        System.out.println("Your Olympic Triathlon rates: ");
        System.out.println("  Swim: " + kilometerSwimRate + " min/km (" +
            mileSwimRate + " min/mile)");
        System.out.println("  Bike: " + kilometerBikeRate + " min/km (" +
            mileBikeRate + " min/mile)");
        System.out.println("   Run: " + kilometerRunRate + " min/km (" +
            mileRunRate + " min/mile)\n");
        // displays 40.0/64.--, 3.0/4.82--, 6.0/9.65--
        
        System.out.println("Projected Ironman Triathlon times: ");
        System.out.println("Swim: " + ironmanSwimTime + "hrs");
        System.out.println("Bike: " + ironmanBikeTime + "hrs");
        System.out.println("Run: " + ironmanRunTime + "hrs");
        System.out.println("Total: " + ironmanTotalTime  + "hrs");
        //oops forgot to divide by 60. now it displays the right answers
        // 2.53333333, 9.0, 4.2195, 15.75283333
        
        //more efficient-looking code using arrays and loops
        
        //initialize
		final double[] OLYMPIC_LENGTH_KM = {1.5, 40, 10};
		final double[] IRONMAN_LENGTH_KM = {3.8, 180, 42.195};
		String[] events = {"Swim", "Bike", "Run"};
		double[] olympicTime = new double[events.length];
		double[] kilometerRate = new double[events.length];
		double[] mileRate = new double[events.length];
		double[] ironmanTime = new double[events.length + 1];
		int i;
		String[] printable = {"Your Olympic Triathlon times: ",
		    "Your Olympic Triathlon rates:\n",
		    "Projected Ironman Triathlon times: \n"};
		
		//gather
		System.out.println("Ironman Triathlon: how long will it take you?\n");
		System.out.println("Your Olympic Triathlon times in hours, please:");
		for (i = 0; i < events.length; i++) {
		    System.out.print(events[i] + ": ");
		    olympicTime[i] = stdin.nextDouble();
		    
		    //create string to print after input is entered
		    printable[0] += events[i] + ", " + olympicTime[i];
		    if (i == events.length - 1) {
		        printable[0] += "\n";
            }
            else {
		        printable[0] += "; ";
            }
		    
		    //calculations
		    kilometerRate[i] = olympicTime[i] * 60 / OLYMPIC_LENGTH_KM[i];
		    mileRate[i] = kilometerRate[i] * KILOMETERS_PER_MILE;
		    ironmanTime[i] = kilometerRate[i] * IRONMAN_LENGTH_KM[i] / 60;
		    ironmanTime[events.length] += ironmanTime[i];
		    
		    //create final output strings
		    printable[1] += "  " + events[i] + ": " + kilometerRate[i];
		    printable[1] += " min/km (" + mileRate[i] + " min/mile)\n";
		    printable[2] += "  " + events[i] + ": " + ironmanTime[i] + "\n";
        }
        //print out what the user entered
        System.out.println(printable[0]);
        //print out the calculations
        System.out.println(printable[1]);
        System.out.print(printable[2]);
        System.out.println("Total: " + ironmanTime[events.length]);;
    }
}