// Author: Brian Margell
// Sample Solution to the "Hallways" problem from lecture 4

import becker.robots.*;
import java.util.Random; // to use the "Random" class


public class I_04_If_Complete extends Object
{
	// These are a couple of new commands that belong to the program
	// rather than any particular robot.
	// For right now, don't worry about how these work :)
	public static void hallwayN(City c, int st, int ave, int streetsNorth)
	{
		for(int i = 0; i < streetsNorth; i++)
		{
			new Wall(c, st - i, ave, Direction.WEST);
			new Wall(c, st - i, ave, Direction.EAST);
		}
	}
	
	public static void setupCity(City c)
	{
		// North hallway:
		hallwayN(c, 5, 5, 5);
		new Wall(c, 1, 5, Direction.NORTH);
		new Thing(c, 1, 5);
		
		// West hallway:
		hallwayN(c, 5, 4, 5);
		new Wall(c, 1, 4, Direction.NORTH);
		new Wall(c, 6, 4, Direction.WEST);
		new Wall(c, 6, 4, Direction.SOUTH);
		new Thing(c, 1, 4);
		
		// southern hallway
		hallwayN(c, 9, 4, 2);
		new Wall(c, 7, 4, Direction.WEST);
		new Wall(c, 7, 5, Direction.EAST);
		new Wall(c, 7, 5, Direction.SOUTH);
		new Wall(c, 9, 4, Direction.SOUTH);
		new Thing(c, 9, 4);
		
		// eastern hallway
		new Wall(c, 6, 6, Direction.EAST);
		new Wall(c, 6, 6, Direction.NORTH);
		new Wall(c, 6, 6, Direction.SOUTH);
		new Thing(c, 6, 6);
	}
	
	public static Direction pickDirection()
	{
		Random r = new Random(System.currentTimeMillis());
		switch(r.nextInt(4))
		{
		case 0:
			return Direction.NORTH;
		case 1:
			return Direction.WEST;
		case 2:
			return Direction.EAST;
		case 3:
			return Direction.SOUTH;
		default:
			return Direction.SOUTH; // to keep the compiler happy
		}
	}
	
	
	public static void main(String[] args)
	{ 
		City toronto = new City(12, 9);
		Robot Jo = new Robot(toronto, 6, 5, pickDirection(), 0);
		setupCity(toronto); // ignore this line for now
		
		Jo.move();
		if(Jo.canPickThing()) //east hallway
		{
			Jo.pickThing();
			Jo.turnLeft();
			Jo.turnLeft();
			Jo.move();
			Jo.putThing();
		}
		else
		{
			if(Jo.frontIsClear())
			{
				Jo.move(); //north hallway
				Jo.move();
				Jo.move();
				Jo.move();
				Jo.pickThing();
				Jo.turnLeft();
				Jo.turnLeft();
				Jo.move();
				Jo.move();
				Jo.move();
				Jo.move();
				Jo.move();
				Jo.putThing();
			}
			else
			{	
				Jo.turnLeft(); //start west and south hallways
				Jo.turnLeft();
				Jo.turnLeft();
				Jo.move();
				if(Jo.frontIsClear())
				{
					Jo.move(); //west hallway
					Jo.move();
					Jo.move();
					Jo.move();
					Jo.pickThing();
					Jo.turnLeft();
					Jo.turnLeft();
					Jo.move();
					Jo.move();
					Jo.move();
					Jo.move();
					Jo.move();
					Jo.turnLeft();
					Jo.move();
					Jo.putThing();
				}
				
				else
				{
					Jo.turnLeft(); //south hallway
					Jo.move();
					Jo.move();
					Jo.pickThing();
					Jo.turnLeft();
					Jo.turnLeft();
					Jo.move();
					Jo.move();
					Jo.turnLeft();
					Jo.turnLeft();
					Jo.turnLeft();
					Jo.move();
					Jo.turnLeft();
					Jo.move();
					Jo.putThing();
				}
			}
		}
		
		
	} 
}