package edu.iastate.cs228.hw1;


/**
 *
 * Living refers to the life form occupying a square in a world grid. It is a
 * superclass of Badger, Empty, Fox, Grass, and Rabbit, and has two abstract
 * methods awaiting implementation.
 *
 */
public abstract class Living
{
	protected World world; // the world in which the life form resides
	protected int row;     // location of the square on which
	protected int column;  // the life form resides

	// constants to be used as indices.
	protected static final int BADGER = 0;
	protected static final int EMPTY = 1;
	protected static final int FOX = 2;
	protected static final int GRASS = 3;
	protected static final int RABBIT = 4;

	public static final int NUM_LIFE_FORMS = 5;

	// life expectancies
	public static final int BADGER_MAX_AGE = 4;
	public static final int FOX_MAX_AGE = 5;
	public static final int RABBIT_MAX_AGE = 3;


	/**
	 * Censuses all life forms in the 3 X 3 neighborhood in a world.
	 * @param population  counts of all life forms
	 */
	protected void census(int population[ ])
	{
		// TODO
		//
		// Count the numbers of Badgers, Empties, Foxes, Grasses, and Rabbits
		// in the 3 by 3 neighborhood centered at this Living object.  Store the
		// counts in the array population[] at indices 0, 1, 2, 3, 4, respectively.

		for(int i = row-1; i <= row + 1; i++ )
		{
			for(int j = column - 1; j <= column + 1; j++)
			{
				if(i>0 && j > 0 && i < world.getWidth() && j < world.getWidth())
				{
					if(world.grid[row][column].who() == State.BADGER )
						population[BADGER] ++;
					else if(world.grid[row][column].who() == State.FOX )
						population[FOX] ++;
					else if(world.grid[row][column].who() == State.GRASS )
						population[GRASS] ++;
					else if(world.grid[row][column].who() == State.RABBIT )
						population[RABBIT] ++;
					else population[EMPTY] ++;
				}
			}
		}
	}


	/**
	 * Gets the identity of the life form on the square.
	 * @return State
	 */
	public abstract State who();
	// To be implemented in each class of Badger, Empty, Fox, Grass, and Rabbit.
	//
	// There are five states given in State.java. Include the prefix State in
	// the return value, e.g., return State.Fox instead of Fox.


	/**
	 * Determines the life form on the square in the next cycle.
	 * @param  wNew  world of the next cycle
	 * @return Living
	 */
	public abstract Living next(World wNew);
	// To be implemented in the classes Badger, Empty, Fox, Grass, and Rabbit.
	//
	// For each class (life form), carry out the following:
	//
	// 1. Obtains counts of life forms in the 3X3 neighborhood of the class object.

	// 2. Applies the survival rules for the life form to determine the life form
	//    (on the same square) in the next cycle.  These rules are given in the
	//    project description.
	//
	// 3. Generate this new life form at the same location in the world wNew.


}