import java.text.*;
import java.util.*;

/**This class contains the main method used to run the game.
 */
public class Game {
	
	//CONSTANTS
 	public static final int DEFAULT_INVENTORY_SIZE = 5;
 	public static final int MAX_INVENTORY_SIZE = 15;
 	public static final int MAX_CARGO_AMT = 10;  // how many of each
 	public static final double MAX_CARGO_PRICE = 100.0;
 	public static final double DEFAULT_INITIAL_FUEL = 1000.0;
 	public static final double DEFAULT_FUEL_BURN_RATE = 5.0;
 	public static final double DEFAULT_INITIAL_MONEY = 1000.0;
 	public static final int UNIVERSE_HEIGHT = 12;
 	public static final int UNIVERSE_WIDTH = 10;
 	public static final double UNIVERSE_DENSITY = 0.1;
 	public static final double MAX_COST_FACTOR = 3.0;

 	// random number generator
	public static Random rand = new Random();
	// the universe for the game
	private static Universe universe;
	// a general purpose number format
	public static NumberFormat style = NumberFormat.getNumberInstance();	
	
	/** Gets the universe for the game
	 * @return the universe for the game
	 */
	public static Universe getUniverse() {
		return universe;
	}

	public static void advanceTurn() {
		//rotate();
	}
	// application entry point
	public static void main (String args[]) {
	    // sets the maximum decimal places for numbers to 2
	    style.setMaximumFractionDigits(2);	
	    style.setMinimumFractionDigits(2);
	    // creates a new universe and populates it
	    universe = new Universe (UNIVERSE_HEIGHT, UNIVERSE_WIDTH, UNIVERSE_DENSITY);
	    universe.populate();
	    // creates a new vehicle and places it at a random location in the universe
	    Vehicle vehicle = new Vehicle("InterGallactic Thunderbird", null, 
					  new Inventory(), DEFAULT_INITIAL_FUEL, 
					  "gozorkas", DEFAULT_FUEL_BURN_RATE, 
					  DEFAULT_INITIAL_MONEY, 0);
	    vehicle.setLocation (universe.getRandomLocation());
	    
	    // print introductory banner
		System.out.println("Welcome to CS101 Space Trader v4!");
		System.out.println();
		System.out.println("Your " + vehicle.getVehicleType() + " is starting at " +
				   vehicle.getLocation() + ".");
		System.out.println("You burn fuel at the rate of " +
				   Game.style.format(vehicle.getFuelBurnRate()) + " " +
				   vehicle.getFuelUnits() + " per million kilometers.");	    
	    
	    // begins playing the game
	    vehicle.takeTurn();
	    
	    // trip done! Print out summary.
		System.out.println();
		System.out.println("Congratulations, Space Trader! ");
		System.out.println("Your " + vehicle.getVehicleType() + " traveled " + 
					Game.style.format(vehicle.getTotalDistanceTraveled()) + 
				    " million kilometers.");
		System.out.println("You still have " + Game.style.format(vehicle.getFuel()) + 
					" " + vehicle.getFuelUnits() + " of fuel available.");
		System.out.println("Take the rest of the day off, Space Trader -- you deserve it!");
		System.out.println();
	}
	
}